CA2308583C - Elevated bottom carton - Google Patents
Elevated bottom carton Download PDFInfo
- Publication number
- CA2308583C CA2308583C CA002308583A CA2308583A CA2308583C CA 2308583 C CA2308583 C CA 2308583C CA 002308583 A CA002308583 A CA 002308583A CA 2308583 A CA2308583 A CA 2308583A CA 2308583 C CA2308583 C CA 2308583C
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- Prior art keywords
- elevated
- carton
- elevated portion
- primary
- side panels
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
- 239000011087 paperboard Substances 0.000 claims abstract description 17
- 239000000123 paper Substances 0.000 claims description 20
- 230000007704 transition Effects 0.000 claims description 10
- 235000021056 liquid food Nutrition 0.000 claims description 2
- 238000010521 absorption reaction Methods 0.000 abstract description 19
- 238000004806 packaging method and process Methods 0.000 abstract description 9
- 230000000284 resting effect Effects 0.000 abstract 1
- 238000007789 sealing Methods 0.000 description 16
- 239000000047 product Substances 0.000 description 7
- 239000011094 fiberboard Substances 0.000 description 4
- 239000000463 material Substances 0.000 description 2
- 239000004698 Polyethylene Substances 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 239000006227 byproduct Substances 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- -1 polyethylene Polymers 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 239000002861 polymer material Substances 0.000 description 1
- 238000009877 rendering Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D5/00—Rigid or semi-rigid containers of polygonal cross-section, e.g. boxes, cartons or trays, formed by folding or erecting one or more blanks made of paper
- B65D5/02—Rigid or semi-rigid containers of polygonal cross-section, e.g. boxes, cartons or trays, formed by folding or erecting one or more blanks made of paper by folding or erecting a single blank to form a tubular body with or without subsequent folding operations, or the addition of separate elements, to close the ends of the body
- B65D5/06—Rigid or semi-rigid containers of polygonal cross-section, e.g. boxes, cartons or trays, formed by folding or erecting one or more blanks made of paper by folding or erecting a single blank to form a tubular body with or without subsequent folding operations, or the addition of separate elements, to close the ends of the body with end-closing or contents-supporting elements formed by folding inwardly a wall extending from, and continuously around, an end of the tubular body
- B65D5/061—Rectangular containers having a body with gusset-flaps folded inwardly beneath the closure flaps
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Cartons (AREA)
- Table Devices Or Equipment (AREA)
- Diaphragms For Electromechanical Transducers (AREA)
- Packages (AREA)
- Packaging Frangible Articles (AREA)
- Auxiliary Devices For And Details Of Packaging Control (AREA)
Abstract
A carton (10, 210) having a primary elevated bottom portion (20, 220) extending along the length of an exposed raw paperboard edge (40, 240) to protect the carton (10, 210) and to prevent moisture absorption. The carton (10, 210) may also have a secondary elevated bottom portion (100, 300) substantially within the primary elevated portion (20, 220) and have an elevation greater than the primary elevated bottom portion (20, 220). Additional elevated portions (20a, 220a) are provided for additional raw paperboard edges (40b, 240b) on the bottom of the carton (10, 210). The present invention alleviates the problem of cartons (10, 210) having soggy bottoms since the point of absorption, the raw paperboard edge (40, 240), is elevated above the moisture which may be present during distribution from the packaging machine to the retailer. The elevated bottom portion (20, 220) is actually inverted into the carton (10, 210) with planar portions (60, 260 and 62, 262) resting on the surface to support the carton (10, 210).
Description
ELEVATED BOTTOM CARTON
The present invention relates to a carton having an elevated bottom.
Specifically, the present invention relates to a carton having the edge portions of the bottom elevated to protect the raw paperboard edges from damage and absorption of moisture.
Cartons fabricated from a carton blank on a form, fill and seal packaging machine risk absorption of moisture into the raw paperboard edges of the bottom of the carton. This absorption is accelerated if the raw paperboard edges are damaged and the carton is continuously exposed to moisture. The transportation, loading and storage of the carton from the conveyance between the packaging machinelpacker unit and the retailer display are all sources for damage and moisture absorption.
The raw paper edges are a by-product of the composition of the carton blank. Generally, the carton blank is cut and scored from a sheet of coated fiberboard material. The coated fiberboard material is usually composed of three layers, and may have a barrier layer juxtaposed between fiberboard layers. The exposed surfaces of this sheet are coated with a polymer material such as polyethylene. However, the coating does not extend to the edges which are thus left uncoated, and partially unprotected at least to moisture and sensitive to damage. When the carton is erected and partially formed, these raw paper edges are most prevalent at the bottom of the carton. If moisture is absorbed into the raw paper edges, the water may be absorbed throughout the fiberboard interior layer, which due to its cellulose-like nature, has a strong affinity for liquids.
This absorption of moisture may compromise the integrity of the carton thereby .
rendering it defective.
This problem has yet to be directly addressed by the packaging industry.
However, inventions directed to resolving the stability of cartons have been disclosed in the prior art. Mills et al, U.S. Patent Nos. 5,482,204, and 5.588,943.
respectively for a Carton Bottom Sealer and Carton Bottom Sealing Dies disclose cartons having an embossed inverse pyramidal bottom which is directed to providing greater stability to the filled carton and to reduce bulging of the carton.
It should be noted, as shown in FIGS. 8 and 9 of the Mills et al Patents, that the end portions of the exposed raw paper edges of the bottom of the carton are not embossed, and therefore are susceptible to moisture absorption.
Fujikawa et al, U.S. Patent No. 5,222.667, for a Container Made Of Paper-Base Laminate, similarly discloses a carton having an inverted V-shaped bottom to provide greater stability to the carton. As shown in FIG. 6 of the Fujikawa et al Patent, the raw paper edge of panel 27 is not inverted and is susceptible to moisture absorption since the V-shaped inversion begins at the raw paper edge and since the inversion must be centered to provide stability to the carton.
The present invention mitigates the problem of absorption of moisture through raw paper edges by providing a carton having the raw paper edges elevated in order to protect the raw paperboard edges and reduce the susceptibility of moisture absorption.
The present invention is able to accomplish this without adversely affecting the carton.
Therefore, an object of the present invention is to provide a carton having elevated raw paper edges on the bottom of the carton to prevent moisture absorption.
Another object of the present invention is to provide a carton having all raw paper edges on the bottom of the carton elevated in order to prevent moisture absorption.
One feature of the present invention is the provision of a carton having bottom panels sealed together to form a sealed bottom with the edge of one bottom panel exposed wherein a region surrounding the edge is elevated to prevent moisture absorption.
Another feature of the present invention is the provision of a carton having bottom panels sealed together to form a sealed bottom with a plurality of raw paper edges exposed wherein all of the raw paper edges are elevated to prevent moisture absorption.
Therefore, in one aspect the invention provides a carton having a plurality of side panels, the plurality of side panels including at least a first pair of opposing side panels and a second pair of opposing side panels generally perpendicular to the first pair of opposing side panels, and a plurality of bottom panels, each bottom panel corresponding to an adjacent side panel, the plurality of bottom panels being folded and sealed together to form a sealed carton bottom, a last folded and sealed bottom panel having an exposed edge traversing the bottom of the carton. The carton comprises: a primary elevated portion extending along a length of the exposed edge between the first pair of opposing side panels and generally parallel to the second pair of opposing side panels, the primary elevated portion being inverted into the carton and having an elevation; a first substantially planar portion defined by one side of the primary elevated portion, the first pair of opposing side panels and one of the second pair of opposing side panels; a second substantially planar portion defined by another side of the elevated portion, the first pair of opposing side panels and another of the second pair of side panels; and a secondary elevated portion disposed within the primary elevated portion, the secondary elevated portion having an elevation above the elevation of the primary elevated portion.
3a In another embodiment the invention provides a carton having a plurality of side panels, the plurality of side panels including at least a first pair of opposing side panels and a second pair of opposing side panels generally perpendicular to the first pair of opposing side panels, and a plurality of bottom panels, each bottom panel corresponding to an adjacent side panel, the plurality of bottom panels being folded and sealed together to form a sealed carton bottom, a last folded and sealed bottom panel having a first exposed edge traversing the bottom of the carton and a second exposed edge substantially perpendicular to the first exposed edge. The carton comprises: a primary elevated portion extending along a length of the first exposed edge between the first pair of opposing side panels and generally parallel to the second pair of opposing side panels, the primary elevated portion being inverted into the carton and having an elevation; a side elevated portion extending along a length of the second exposed edge, the side elevated portion being inverted into the carton and having an elevation; a first substantially planar portion defined by one side of the primary elevated portion, the first pair of opposing side panels and one of the second pair of opposing side panels; a second substantially planar portion defined by another side of the primary elevated portion, the first pair of opposing side panels and another of the second pair of opposing side panels;
and secondary elevated portion disposed within the primary elevated portion, the secondary elevated portion having an elevation above the elevation of the primary elevated portion.
In another aspect a carton according to the invention can have a plurality of side panels, the plurality of side panels including at least a first pair of opposing side panels and a second pair of opposing side panels generally perpendicular to the first pair of opposing side panels, and a plurality of bottom panels, each bottom panel corresponding to an adjacent side panel, the plurality of bottom panels being folded and sealed together to form a sealed carton bottom, a last folded and sealed bottom panel having a plurality of exposed edges; the carton comprising: a plurality of primary elevated portions, each of the plurality of primary elevated portions corresponding to an associated one of the exposed edges, each of the primary elevated portions having an elevation; and a secondary elevated portion disposed within one of the plurality of primary elevated portions, the secondary elevated portion having an elevation above the elevation of the primary elevated portion within which it is disposed.
3b In a specific embodiment according to the invention a carton for a liquid food product has first, second, third and fourth side panels, each side panel ending at a corresponding bottom panel, first and third opposing bottom panels folded under second and fourth opposing bottom panels, the fourth bottom panel having a first exposed edge of paperboard or paper transversing the bottom of the carton from the end of the first side panel to the end of the third side panel and a second exposed edge of paperboard or paper substantially perpendicular to the first exposed edge. The carton further comprises: a first elevated portion extending along the length of the first exposed edge from the end of the first side panel to the end of the third side panel, the first elevated portion being inverted into the carton thereby inverting the first exposed edge, the first exposed edge lying on a first horizontal plane; a second elevated portion extending along the entire length of the second exposed edge, the second elevated portion being inverted into the carton thereby inverting the second exposed edge, the second exposed edge lying on the first horizontal plane; a first substantially planar portion defined by one side of the elevated portion and the ends of the fourth side panel and portions of the first and third side panels, the first substantially planar portion being substantially perpendicular to the corresponding side panels and lying on a second horizontal plane; and a second substantially planar portion defined by an opposing side of the elevated portion and the ends of the second side panel and portions of the first and third side panels, the second substantially planar portion being substantially perpendicular to the corresponding side panels and lying on the second horizontal plane. The first substantially planar portion and the second substantially planar portion define an area on the bottom of the carton larger than the first and second elevated portions and whereby the first horizontal plane lies above the second horizontal plane.
In yet another aspect, the invention contemplates a carton having a plurality of side panels and a plurality of bottom panels corresponding thereto, the plurality of bottom panels folded and sealed together to form a sealed bottom, the carton having a first exposed edge traversing the bottom of the carton and a second exposed edge substantially perpendicular to the first exposed edge. The carton comprises: a primary elevated portion extending along a length of the first exposed edge, the elevated portion being inverted into the carton; a first substantially planar portion defined by one side of the elevated portion and the ends of side panels corresponding thereto, the first substantially 3c planar portion being substantially perpendicular to the corresponding side panels; a second substantially planar portion defined by another side of the elevated portion and the ends of side panels corresponding thereto, the second substantially planar portion being substantially perpendicular to the corresponding side panels; and a side angled portion extending along the length of the second exposed edge, the side angled portion being inverted into the carton forming an obtuse angle with one of said first and second substantially planar portions.
In accordance with an alternative embodiment a carton has a plurality of side panels and a plurality of bottom panels corresponding thereto, the plurality of bottom panels folded and sealed together to form a sealed bottom, a last folded and sealed bottom panel having a first exposed edge traversing the bottom of the carton and a penultimate folded and sealed bottom panel having a second exposed edge substantially perpendicular to the first exposed edge. This carton comprises: a primary elevated portion extending along the length of the first exposed edge, the primary elevated portion being inverted into the carton; a side elevated portion extending along the length of the second exposed edge, the side elevated portion being inverted into the carton;
a first substantially planar portion defined by one side of the primary elevated portion and the ends of side panels corresponding thereto, the first substantially planar portion being substantially perpendicular to the corresponding side panels; a second substantially planar portion defined by another side of the primary elevated portion and the ends of side panels corresponding thereto, the second substantially planar portion being substantially perpendicular to the corresponding side panels, the previously-mentioned side elevated portion forming an obtuse angle with one of said first and second substantially planar portions; and a first secondary elevated portion disposed within the primary elevated portion, the secondary elevated portion being inverted into the carton a depth greater than a depth of the primary elevated portion.
A yet additional aspect provides a carton having a plurality of side panels and a plurality of bottom panels corresponding thereto, the plurality of bottom panels folded and sealed together to form a sealed bottom, a last folded and sealed bottom panel having a first exposed edge traversing the bottom of the carton and a penultimate folded and sealed bottom panel having a second exposed edge substantially perpendicular to the first exposed edge. This carton comprises: a primary elevated portion extending along a 3d length of the first exposed edge, the primary elevated portion being inverted into the carton; a side elevated portion extending along a length of the second exposed edge, the side elevated portion being inverted into the carton; a first substantially planar portion defined by one side of the primary elevated portion and the ends of side panels corresponding thereto, the first substantially planar portion being substantially perpendicular to the corresponding side panels; a second substantially planar portion defined by another side of the primary elevated portion and the ends of side panels corresponding thereto, the second substantially planar portion being substantially perpendicular to the corresponding side panels, the above-mentioned side elevated portion forming an obtuse angle with one of said first and second substantially planar portions; a first secondary elevated portion disposed within the primary elevated portion, the first secondary elevated portion being inverted into the carton a depth that is greater than a depth of the primary elevated portion; and a second secondary elevated portion disposed within the primary elevated portion and opposite the first secondary elevated portion, the second secondary elevated portion being inverted into the carton a depth that is greater than a depth of the primary elevated portion.
Brief Description of the Drawings Several features of the present invention are further described in connection with the accompanying drawings in which:
There is illustrated in FIG. 1 a perspective view of one embodiment of a carton of the present invention.
There is illustrated in FIG. 2 a plan view of a blank for the carton of FIG.
1.
There is illustrated in FIG. 3 bottom perspective view of one embodiment of a carton of the present invention.
There is illustrated in FIG. 4 bottom perspective view of another embodiment of a carton of the present invention.
There is illustrated in FIG. 5 bottom perspective view of a preferred embodiment of a carton of the present invention.
There is illustrated in FIG. 6 a perspective view of another embodiment of a carton of the present invention.
There is illustrated in FIG. 7 a plan view of a blank for the carton of FIG.
6.
There is illustrated in FIG. 8 bottom perspective view of one embodiment of a carton of the present invention.
There is illustrated in FIG. 9 bottom perspective view of another embodiment of a carton of the present invention.
There is illustrated in FIG. 1 a carton 10 embodying the present invention.
The carton 10 has a plurality of side panels 12a and 12b, a top panel 14, a top fin 5 16, bottom score lines 18a and 18b defining the bottom from the side panels 12a and 12b, and an elevated portion 20. The side panel 12b is actually folded over and sealed to a sealing panel 22. The folding and sealing of the carton creates a raw paper edge which extends from the top 16 to the bottom of the carton 10 along this intersection of the sealing panel 22 and side panel 12b, top panel 14, top fin 16 and the bottom panel corresponding to side panel 12b.
FIG. 2 illustrates a blank 30 of the carton 10 of FIG. 1. The side panels ~12a-d are separated from bottom panels 32a-d by bottom horizontal score lines and each of the side panels 12a-d and bottom panels 32a-d are separated from each other by vertical score lines 36. The side panels 12a-d are separated from top panels 14 and 14b-d by top horizontal score lines 38. The top fin panels 16 and 16b-d are separated from top panels 14 and 14b-d by upper horizontal score line 39. The sealing panel 22 is separated from side panel 12a by a vertical score line 36. A top sealing panel 22b and a bottom sealing panel 22c further define sealing panel 22. The raw paper edge 40 extends along top fin 16, top panel 14, side panel 12b and bottom panel 32b.
FIG. 3 shows an embodiment of the present invention. The bottom of the carton 10 has the elevated portion 20 bounded by substantially planar portions and 62. The planar portions 60 and 62 are substantially perpendicular to side panels 12a, 12b and 12c and 12d, not shown. The planar portions 60 and 62 c~ contact a conveyor belt while elevated portion 20 is elevated above the belt and any moisture thereon. The same applies during distribution whether in a crate or a shelf at a store.
The elevated portion 20 is further defined by angled portions 64 and 66 and elevated planar portion 70. The elevated planar portion 70 is further defined as elevated planar portion 70a and elevated planar portion 70b. The elevated planar portion 70a substantially includes a portion of panel 32b while elevated planar portion 70b includes a portion of panel 32d. The exposed raw paper edge 40a traverses the bottom of the carton 10, extending from the end of panel 12 a to the end of panel 12c, not shown. Likewise, the elevated portion 20 traverses the bottom of the carton 10. Preferably, elevated portion 20 is centered on the bottom of the carton 10 with planar portions 60 and 62 being equal in area to each other.
However, those skilled in the pertinent art will recognize that planar portions 60 and 62 may be unequal and elevated portion 20 may be uncentered without departing from the scope and spirit of the present invention.
It is readily apparent that elevated portion 70a. angled portion 64 and planar portion 60 all are part of bottom panel 32b. Also. elevated portion 70b, angled portion 66 and planar portion 62 all are part of bottom panel 32d.
FIG. 4 shows an alternate embodiment of the present invention. FIG. 4 is similar to FIG. 3 except that all exposed raw paper edges 40a and 40b are elevated. The exposed edge 40b is substantially perpendicular to exposed edge 40a. A second elevated portion 20a elevates this exposed edge 40b thereby preventing moisture absorption as with exposed edge 40a. The second elevated portion 20a has an angled portion 70 that engages planar portion 60, side panel 12a, and angled portion 64. Those skilled in the art will recognize that the exposed raw edges may be elevated in a similar fashion without departing from the scope and content of the present invention.
A preferred embodiment of the present invention is illustrated in FIG. 5.
As shown in FIG. 5, the exposed edge 40b is substantially perpendicular to exposed edge 40a. A side elevated portion 20a elevates this exposed edge 40b thereby preventing moisture absorption as with exposed edge 40a. The side elevated portion 20a has an angled portion 72 which engages planar portion 60, side panel 12a, and angled portion 64. Those skilled in the art will recognize that the exposed raw edges may be elevated in a similar fashion without departing from the scope and content of the present invention.
Approximately in the center of the elevated portion 20 is a secondary elevated portion 100. The secondary elevated portion 100 prevents loss of elevation in the center of the bottom of the carton 10 during transportation from a packaging machine to the retailer/wholesaler to the consumer. As is apparent, the center of the bottom of the carton 10 is most susceptible to deelevation from the weight of the product. The weight of the product in the carton 10 is focused on the center of the bottom of the carton 10, and thus it is necessary to provide greater elevation in this area. This greater elevation is provided by the seconday elevated portion 100 which compensates for gravitational forces exerted by the product on the center of the bottom of the carton 10.
In a preferred embodiment, the secondary elevated portion 100 is triangular in shape with its apex 1 O1 near the exact center of the bottom of the carton 10. The secondary elevated portion 100 is substantially contained within elevated planar portions 70a and 70b. However, there is a transition to angled portion 66. Alternatively, the triangular shaped embodiment of the secondary WO 99/2053b PCT/US98/22029 elevated portion 100 may be rotated any degree from 1-360 degrees, about apex 101 while not departing from the scope and spirit of the present invention.
Thus.
the secondary elevated portion 100 may lie entirely within elevated planar portion 70a.
In the preferred embodiment, the secondary elevated portion 100 is partially defined by secondary angled portions 102, 104, 106 and 108. The secondary angled portions 102 and 104 form a transition from the secondary elevated portion 100 to elevated planar portion 70a whereas the secondary angled portions 106 and 108 form a transition from the secondary elevated portion 100 to elevated planar portion 70b.
The bottom of the carton 10 is usually formed on a mandrel of a form, fill and seal packaging machine, not shown. The carton blanks 30 are fed from a magazine, not shown, to a bottom forming station of the machine, not shown.
During the transfer from magazine to bottom forming station, the carton blank is erected. On the bottom forming station, the bottom panels are pretreated if necessary, and then heat-sealed together to form the bottom. This is accomplished by pressing against the bottom panels as they lie on the mandrel. In order to achieve the elevated bottom of the present invention, one may have a special press and mandrel that allows for the elevated bottom of the present invention.
There is illustrated in FIG. 6 a carton 210 another embodiment of the present invention. The carton 210 has a plurality of side panels 212a and 212b, a top panel 214, a top fin 216, bottom score lines 218a and 218b defining the bottom from the side panels 212a and 212b, and an elevated portion 220. A sealing panel 222, partially shown in FIG. 6, is connected to the side panel 212a and is folded over and sealed to the side panel 212b, not shown. The folding and sealing of the carton creates a raw paperboard edge which extends from the top 216 to the bottom of the carton 210 along this intersection of the sealing panel 222 and side panel 212b, top panel 214, top fin 216 and the bottom panel corresponding to side panel 212d.
FIG. 7 illustrates a blank 230 of the carton 210 of FIG. 6. The side panels 212a-d are separated from bottom panels 232a-d by bottom horizontal score lines 234 and each of the side panels 212a-d and bottom panels 232a-d are separated from each other by vertical score lines 236. The side panels 212a-d are separated from top panels 214a-d by top horizontal score lines 238. The top fin panels 216a-d are separated from top panels 214a-d by upper horizontal score line 239.
The sealing panel 222 is separated from side panel 212a by a vertical score line 236. A top sealing panel 222b and a bottom sealing panel 222c further define sealing panel 222. The raw paperboard edge 240 extends along the entire perimeter of the carton blank 230. However, for purposes of this invention, the most important portions of the raw paperboard edge 240 are portions 240a and 240b which lie on the bottom of the carton. All other portions of the raw paperboard edge 240 are either covered by a coated panel, or are elevated above the surface when the blank 230 is formed into a carton 210. Thus, moisture absorption by these portions of the raw paperboard edge 240 is highly unlikely.
FIG. 8 shows another embodiment of the elevated bottom of the present invention. The bottom of the carton 210 has the elevated portion 220 bounded by substantially planar portions 260 and 262. The planar portions 260 and 262 are substantially perpendicular to side panels 212a, 212b and 212c and 212d, not shown. The planar portions 260 and 262 contact a surface such as a conveyor belt on a packaging machine while the elevated portion 220 is elevated above the surface and any moisture thereon. The same applies during distribution of the carton whether in a crate or on a shelf at a store.
The elevated portion 220 is further defined by angled portions 264 and 266 and elevated planar portion 270. The elevated planar portion 270 is further 5 defined as elevated planar portion 270a and elevated planar portion 270b.
The elevated planar portion 270a substantially includes a portion of panel 232b while elevated planar portion 270b includes a portion of panel 232d. The exposed raw paperboard edge 240b traverses the bottom of the carton 210, extending from the end of panel 212a to the end of panel 212c, not shown. Likewise, the elevated 10 portion 220 traverses the bottom of the carton 210. Preferably, the elevated portion 220 is centered on the bottom of the carton 210 with planar portions and 262 being equal in area to each other. However, those skilled in the pertinent art will recognize that planar portions 260 and 262 may be unequal and elevated portion 220 may be uncentered without departing from the scope and spirit of the present invention.
It is readily apparent that elevated portion 270a_ angled portion 264 and planar portion 260 all are part of bottom panel 232b. Also, elevated portion 270b, angled portion 266 and planar portion 262 all are part of bottom panel 232d.
The exposed edge 240a is substantially perpendicular to exposed edge 240b. A side elevated/angled portion 220a elevates this exposed edge 240a thereby preventing moisture absorption as with exposed edge 240b. The side elevated/angled portion 220a has an angled portion 272 which engages planar portion 260, side panel 212a, and angled portion 264. Those skilled in the art will recognize that the exposed raw edges may be elevated in a similar fashion without -departing from the scope and content of the present invention.
Another embodiment of the elevated bottom of the carton of the present invention is shown in FIG. 9. The carton 210 of FIG. 9 is similar to the carton 210 of FIG. 8 except that approximately in the center of the elevated portion are secondary elevated portions 300 and 301. The secondary elevated portions 300 and 301 prevent loss of elevation in the center of the bottom of the carton 210 during transportation from a packaging machine to the retailer/wholesaler to the consumer. As is apparent, the center of the bottom of the carton 210 is most susceptible to deelevation from the weight of the product. The weight of the product in the carton 210 is focused on the center of the bottom of the carton 210.
and thus it is necessary to provide greater elevation in this area. This greater elevation is provided by the secondary elevated portions 300 and 301 which compensate for gravitational forces exerted by the product on the center of the bottom of the carton 210.
In an exemplary embodiment, the secondary elevated portions 300 and 301 are triangular in shape with apices 302a-b facing the center of the bottom of the carton 210. The secondary elevated portions 300 and 301 are substantially contained within elevated planar portions 270a and 270b. However, there is a transition for each secondary elevated portions 300 and 301 to angled portions and 264, respectively. Alternatively, the triangular shaped embodiment of the secondary elevated portions 300 and 301 may be rotated any degree from 1-360 degrees, about apices 302a-b while not departing from the scope and spirit of the present invention. Thus, the secondary elevated portions 300 and 301 may lie entirely within elevated planar portion 270b and 270a, respectively.
In this embodiment, the secondary elevated portions 300 and 301 are partially defined by secondary angled portions 304a-d. The secondary angled WO 99/20536 PCT/US98l22029 portions 304a-d form a transition from the secondary elevated portions 300 and 301 to the elevated planar portions 270b and 270a.
In an alternative embodiment not shown, the canon 210 of FIG. 9 may only have one secondary elevated portion 300 or 301 which may be disposed on either of planar portion 270a or 270b.
The bottom of the carton 210 is usually formed on a mandrel of a form, fi 11 and seal packaging machine, not shown. The carton blanks 230 are fed from a magazine, not shown, to a bottom forming station of the machine, not shown.
During the transfer from magazine to bottom forming station, the carton blank is erected. On the bottom forming station, the bottom panels are pretreated if necessary, and then heat sealed together to form the bottom. This is accomplished by pressing against the bottom panels as they lie on the mandrel. In order to achieve the elevated bottom of the present invention, one may have a special sealing plate and mandrel which allows for the elevated bottom of the present invention.
The present invention relates to a carton having an elevated bottom.
Specifically, the present invention relates to a carton having the edge portions of the bottom elevated to protect the raw paperboard edges from damage and absorption of moisture.
Cartons fabricated from a carton blank on a form, fill and seal packaging machine risk absorption of moisture into the raw paperboard edges of the bottom of the carton. This absorption is accelerated if the raw paperboard edges are damaged and the carton is continuously exposed to moisture. The transportation, loading and storage of the carton from the conveyance between the packaging machinelpacker unit and the retailer display are all sources for damage and moisture absorption.
The raw paper edges are a by-product of the composition of the carton blank. Generally, the carton blank is cut and scored from a sheet of coated fiberboard material. The coated fiberboard material is usually composed of three layers, and may have a barrier layer juxtaposed between fiberboard layers. The exposed surfaces of this sheet are coated with a polymer material such as polyethylene. However, the coating does not extend to the edges which are thus left uncoated, and partially unprotected at least to moisture and sensitive to damage. When the carton is erected and partially formed, these raw paper edges are most prevalent at the bottom of the carton. If moisture is absorbed into the raw paper edges, the water may be absorbed throughout the fiberboard interior layer, which due to its cellulose-like nature, has a strong affinity for liquids.
This absorption of moisture may compromise the integrity of the carton thereby .
rendering it defective.
This problem has yet to be directly addressed by the packaging industry.
However, inventions directed to resolving the stability of cartons have been disclosed in the prior art. Mills et al, U.S. Patent Nos. 5,482,204, and 5.588,943.
respectively for a Carton Bottom Sealer and Carton Bottom Sealing Dies disclose cartons having an embossed inverse pyramidal bottom which is directed to providing greater stability to the filled carton and to reduce bulging of the carton.
It should be noted, as shown in FIGS. 8 and 9 of the Mills et al Patents, that the end portions of the exposed raw paper edges of the bottom of the carton are not embossed, and therefore are susceptible to moisture absorption.
Fujikawa et al, U.S. Patent No. 5,222.667, for a Container Made Of Paper-Base Laminate, similarly discloses a carton having an inverted V-shaped bottom to provide greater stability to the carton. As shown in FIG. 6 of the Fujikawa et al Patent, the raw paper edge of panel 27 is not inverted and is susceptible to moisture absorption since the V-shaped inversion begins at the raw paper edge and since the inversion must be centered to provide stability to the carton.
The present invention mitigates the problem of absorption of moisture through raw paper edges by providing a carton having the raw paper edges elevated in order to protect the raw paperboard edges and reduce the susceptibility of moisture absorption.
The present invention is able to accomplish this without adversely affecting the carton.
Therefore, an object of the present invention is to provide a carton having elevated raw paper edges on the bottom of the carton to prevent moisture absorption.
Another object of the present invention is to provide a carton having all raw paper edges on the bottom of the carton elevated in order to prevent moisture absorption.
One feature of the present invention is the provision of a carton having bottom panels sealed together to form a sealed bottom with the edge of one bottom panel exposed wherein a region surrounding the edge is elevated to prevent moisture absorption.
Another feature of the present invention is the provision of a carton having bottom panels sealed together to form a sealed bottom with a plurality of raw paper edges exposed wherein all of the raw paper edges are elevated to prevent moisture absorption.
Therefore, in one aspect the invention provides a carton having a plurality of side panels, the plurality of side panels including at least a first pair of opposing side panels and a second pair of opposing side panels generally perpendicular to the first pair of opposing side panels, and a plurality of bottom panels, each bottom panel corresponding to an adjacent side panel, the plurality of bottom panels being folded and sealed together to form a sealed carton bottom, a last folded and sealed bottom panel having an exposed edge traversing the bottom of the carton. The carton comprises: a primary elevated portion extending along a length of the exposed edge between the first pair of opposing side panels and generally parallel to the second pair of opposing side panels, the primary elevated portion being inverted into the carton and having an elevation; a first substantially planar portion defined by one side of the primary elevated portion, the first pair of opposing side panels and one of the second pair of opposing side panels; a second substantially planar portion defined by another side of the elevated portion, the first pair of opposing side panels and another of the second pair of side panels; and a secondary elevated portion disposed within the primary elevated portion, the secondary elevated portion having an elevation above the elevation of the primary elevated portion.
3a In another embodiment the invention provides a carton having a plurality of side panels, the plurality of side panels including at least a first pair of opposing side panels and a second pair of opposing side panels generally perpendicular to the first pair of opposing side panels, and a plurality of bottom panels, each bottom panel corresponding to an adjacent side panel, the plurality of bottom panels being folded and sealed together to form a sealed carton bottom, a last folded and sealed bottom panel having a first exposed edge traversing the bottom of the carton and a second exposed edge substantially perpendicular to the first exposed edge. The carton comprises: a primary elevated portion extending along a length of the first exposed edge between the first pair of opposing side panels and generally parallel to the second pair of opposing side panels, the primary elevated portion being inverted into the carton and having an elevation; a side elevated portion extending along a length of the second exposed edge, the side elevated portion being inverted into the carton and having an elevation; a first substantially planar portion defined by one side of the primary elevated portion, the first pair of opposing side panels and one of the second pair of opposing side panels; a second substantially planar portion defined by another side of the primary elevated portion, the first pair of opposing side panels and another of the second pair of opposing side panels;
and secondary elevated portion disposed within the primary elevated portion, the secondary elevated portion having an elevation above the elevation of the primary elevated portion.
In another aspect a carton according to the invention can have a plurality of side panels, the plurality of side panels including at least a first pair of opposing side panels and a second pair of opposing side panels generally perpendicular to the first pair of opposing side panels, and a plurality of bottom panels, each bottom panel corresponding to an adjacent side panel, the plurality of bottom panels being folded and sealed together to form a sealed carton bottom, a last folded and sealed bottom panel having a plurality of exposed edges; the carton comprising: a plurality of primary elevated portions, each of the plurality of primary elevated portions corresponding to an associated one of the exposed edges, each of the primary elevated portions having an elevation; and a secondary elevated portion disposed within one of the plurality of primary elevated portions, the secondary elevated portion having an elevation above the elevation of the primary elevated portion within which it is disposed.
3b In a specific embodiment according to the invention a carton for a liquid food product has first, second, third and fourth side panels, each side panel ending at a corresponding bottom panel, first and third opposing bottom panels folded under second and fourth opposing bottom panels, the fourth bottom panel having a first exposed edge of paperboard or paper transversing the bottom of the carton from the end of the first side panel to the end of the third side panel and a second exposed edge of paperboard or paper substantially perpendicular to the first exposed edge. The carton further comprises: a first elevated portion extending along the length of the first exposed edge from the end of the first side panel to the end of the third side panel, the first elevated portion being inverted into the carton thereby inverting the first exposed edge, the first exposed edge lying on a first horizontal plane; a second elevated portion extending along the entire length of the second exposed edge, the second elevated portion being inverted into the carton thereby inverting the second exposed edge, the second exposed edge lying on the first horizontal plane; a first substantially planar portion defined by one side of the elevated portion and the ends of the fourth side panel and portions of the first and third side panels, the first substantially planar portion being substantially perpendicular to the corresponding side panels and lying on a second horizontal plane; and a second substantially planar portion defined by an opposing side of the elevated portion and the ends of the second side panel and portions of the first and third side panels, the second substantially planar portion being substantially perpendicular to the corresponding side panels and lying on the second horizontal plane. The first substantially planar portion and the second substantially planar portion define an area on the bottom of the carton larger than the first and second elevated portions and whereby the first horizontal plane lies above the second horizontal plane.
In yet another aspect, the invention contemplates a carton having a plurality of side panels and a plurality of bottom panels corresponding thereto, the plurality of bottom panels folded and sealed together to form a sealed bottom, the carton having a first exposed edge traversing the bottom of the carton and a second exposed edge substantially perpendicular to the first exposed edge. The carton comprises: a primary elevated portion extending along a length of the first exposed edge, the elevated portion being inverted into the carton; a first substantially planar portion defined by one side of the elevated portion and the ends of side panels corresponding thereto, the first substantially 3c planar portion being substantially perpendicular to the corresponding side panels; a second substantially planar portion defined by another side of the elevated portion and the ends of side panels corresponding thereto, the second substantially planar portion being substantially perpendicular to the corresponding side panels; and a side angled portion extending along the length of the second exposed edge, the side angled portion being inverted into the carton forming an obtuse angle with one of said first and second substantially planar portions.
In accordance with an alternative embodiment a carton has a plurality of side panels and a plurality of bottom panels corresponding thereto, the plurality of bottom panels folded and sealed together to form a sealed bottom, a last folded and sealed bottom panel having a first exposed edge traversing the bottom of the carton and a penultimate folded and sealed bottom panel having a second exposed edge substantially perpendicular to the first exposed edge. This carton comprises: a primary elevated portion extending along the length of the first exposed edge, the primary elevated portion being inverted into the carton; a side elevated portion extending along the length of the second exposed edge, the side elevated portion being inverted into the carton;
a first substantially planar portion defined by one side of the primary elevated portion and the ends of side panels corresponding thereto, the first substantially planar portion being substantially perpendicular to the corresponding side panels; a second substantially planar portion defined by another side of the primary elevated portion and the ends of side panels corresponding thereto, the second substantially planar portion being substantially perpendicular to the corresponding side panels, the previously-mentioned side elevated portion forming an obtuse angle with one of said first and second substantially planar portions; and a first secondary elevated portion disposed within the primary elevated portion, the secondary elevated portion being inverted into the carton a depth greater than a depth of the primary elevated portion.
A yet additional aspect provides a carton having a plurality of side panels and a plurality of bottom panels corresponding thereto, the plurality of bottom panels folded and sealed together to form a sealed bottom, a last folded and sealed bottom panel having a first exposed edge traversing the bottom of the carton and a penultimate folded and sealed bottom panel having a second exposed edge substantially perpendicular to the first exposed edge. This carton comprises: a primary elevated portion extending along a 3d length of the first exposed edge, the primary elevated portion being inverted into the carton; a side elevated portion extending along a length of the second exposed edge, the side elevated portion being inverted into the carton; a first substantially planar portion defined by one side of the primary elevated portion and the ends of side panels corresponding thereto, the first substantially planar portion being substantially perpendicular to the corresponding side panels; a second substantially planar portion defined by another side of the primary elevated portion and the ends of side panels corresponding thereto, the second substantially planar portion being substantially perpendicular to the corresponding side panels, the above-mentioned side elevated portion forming an obtuse angle with one of said first and second substantially planar portions; a first secondary elevated portion disposed within the primary elevated portion, the first secondary elevated portion being inverted into the carton a depth that is greater than a depth of the primary elevated portion; and a second secondary elevated portion disposed within the primary elevated portion and opposite the first secondary elevated portion, the second secondary elevated portion being inverted into the carton a depth that is greater than a depth of the primary elevated portion.
Brief Description of the Drawings Several features of the present invention are further described in connection with the accompanying drawings in which:
There is illustrated in FIG. 1 a perspective view of one embodiment of a carton of the present invention.
There is illustrated in FIG. 2 a plan view of a blank for the carton of FIG.
1.
There is illustrated in FIG. 3 bottom perspective view of one embodiment of a carton of the present invention.
There is illustrated in FIG. 4 bottom perspective view of another embodiment of a carton of the present invention.
There is illustrated in FIG. 5 bottom perspective view of a preferred embodiment of a carton of the present invention.
There is illustrated in FIG. 6 a perspective view of another embodiment of a carton of the present invention.
There is illustrated in FIG. 7 a plan view of a blank for the carton of FIG.
6.
There is illustrated in FIG. 8 bottom perspective view of one embodiment of a carton of the present invention.
There is illustrated in FIG. 9 bottom perspective view of another embodiment of a carton of the present invention.
There is illustrated in FIG. 1 a carton 10 embodying the present invention.
The carton 10 has a plurality of side panels 12a and 12b, a top panel 14, a top fin 5 16, bottom score lines 18a and 18b defining the bottom from the side panels 12a and 12b, and an elevated portion 20. The side panel 12b is actually folded over and sealed to a sealing panel 22. The folding and sealing of the carton creates a raw paper edge which extends from the top 16 to the bottom of the carton 10 along this intersection of the sealing panel 22 and side panel 12b, top panel 14, top fin 16 and the bottom panel corresponding to side panel 12b.
FIG. 2 illustrates a blank 30 of the carton 10 of FIG. 1. The side panels ~12a-d are separated from bottom panels 32a-d by bottom horizontal score lines and each of the side panels 12a-d and bottom panels 32a-d are separated from each other by vertical score lines 36. The side panels 12a-d are separated from top panels 14 and 14b-d by top horizontal score lines 38. The top fin panels 16 and 16b-d are separated from top panels 14 and 14b-d by upper horizontal score line 39. The sealing panel 22 is separated from side panel 12a by a vertical score line 36. A top sealing panel 22b and a bottom sealing panel 22c further define sealing panel 22. The raw paper edge 40 extends along top fin 16, top panel 14, side panel 12b and bottom panel 32b.
FIG. 3 shows an embodiment of the present invention. The bottom of the carton 10 has the elevated portion 20 bounded by substantially planar portions and 62. The planar portions 60 and 62 are substantially perpendicular to side panels 12a, 12b and 12c and 12d, not shown. The planar portions 60 and 62 c~ contact a conveyor belt while elevated portion 20 is elevated above the belt and any moisture thereon. The same applies during distribution whether in a crate or a shelf at a store.
The elevated portion 20 is further defined by angled portions 64 and 66 and elevated planar portion 70. The elevated planar portion 70 is further defined as elevated planar portion 70a and elevated planar portion 70b. The elevated planar portion 70a substantially includes a portion of panel 32b while elevated planar portion 70b includes a portion of panel 32d. The exposed raw paper edge 40a traverses the bottom of the carton 10, extending from the end of panel 12 a to the end of panel 12c, not shown. Likewise, the elevated portion 20 traverses the bottom of the carton 10. Preferably, elevated portion 20 is centered on the bottom of the carton 10 with planar portions 60 and 62 being equal in area to each other.
However, those skilled in the pertinent art will recognize that planar portions 60 and 62 may be unequal and elevated portion 20 may be uncentered without departing from the scope and spirit of the present invention.
It is readily apparent that elevated portion 70a. angled portion 64 and planar portion 60 all are part of bottom panel 32b. Also. elevated portion 70b, angled portion 66 and planar portion 62 all are part of bottom panel 32d.
FIG. 4 shows an alternate embodiment of the present invention. FIG. 4 is similar to FIG. 3 except that all exposed raw paper edges 40a and 40b are elevated. The exposed edge 40b is substantially perpendicular to exposed edge 40a. A second elevated portion 20a elevates this exposed edge 40b thereby preventing moisture absorption as with exposed edge 40a. The second elevated portion 20a has an angled portion 70 that engages planar portion 60, side panel 12a, and angled portion 64. Those skilled in the art will recognize that the exposed raw edges may be elevated in a similar fashion without departing from the scope and content of the present invention.
A preferred embodiment of the present invention is illustrated in FIG. 5.
As shown in FIG. 5, the exposed edge 40b is substantially perpendicular to exposed edge 40a. A side elevated portion 20a elevates this exposed edge 40b thereby preventing moisture absorption as with exposed edge 40a. The side elevated portion 20a has an angled portion 72 which engages planar portion 60, side panel 12a, and angled portion 64. Those skilled in the art will recognize that the exposed raw edges may be elevated in a similar fashion without departing from the scope and content of the present invention.
Approximately in the center of the elevated portion 20 is a secondary elevated portion 100. The secondary elevated portion 100 prevents loss of elevation in the center of the bottom of the carton 10 during transportation from a packaging machine to the retailer/wholesaler to the consumer. As is apparent, the center of the bottom of the carton 10 is most susceptible to deelevation from the weight of the product. The weight of the product in the carton 10 is focused on the center of the bottom of the carton 10, and thus it is necessary to provide greater elevation in this area. This greater elevation is provided by the seconday elevated portion 100 which compensates for gravitational forces exerted by the product on the center of the bottom of the carton 10.
In a preferred embodiment, the secondary elevated portion 100 is triangular in shape with its apex 1 O1 near the exact center of the bottom of the carton 10. The secondary elevated portion 100 is substantially contained within elevated planar portions 70a and 70b. However, there is a transition to angled portion 66. Alternatively, the triangular shaped embodiment of the secondary WO 99/2053b PCT/US98/22029 elevated portion 100 may be rotated any degree from 1-360 degrees, about apex 101 while not departing from the scope and spirit of the present invention.
Thus.
the secondary elevated portion 100 may lie entirely within elevated planar portion 70a.
In the preferred embodiment, the secondary elevated portion 100 is partially defined by secondary angled portions 102, 104, 106 and 108. The secondary angled portions 102 and 104 form a transition from the secondary elevated portion 100 to elevated planar portion 70a whereas the secondary angled portions 106 and 108 form a transition from the secondary elevated portion 100 to elevated planar portion 70b.
The bottom of the carton 10 is usually formed on a mandrel of a form, fill and seal packaging machine, not shown. The carton blanks 30 are fed from a magazine, not shown, to a bottom forming station of the machine, not shown.
During the transfer from magazine to bottom forming station, the carton blank is erected. On the bottom forming station, the bottom panels are pretreated if necessary, and then heat-sealed together to form the bottom. This is accomplished by pressing against the bottom panels as they lie on the mandrel. In order to achieve the elevated bottom of the present invention, one may have a special press and mandrel that allows for the elevated bottom of the present invention.
There is illustrated in FIG. 6 a carton 210 another embodiment of the present invention. The carton 210 has a plurality of side panels 212a and 212b, a top panel 214, a top fin 216, bottom score lines 218a and 218b defining the bottom from the side panels 212a and 212b, and an elevated portion 220. A sealing panel 222, partially shown in FIG. 6, is connected to the side panel 212a and is folded over and sealed to the side panel 212b, not shown. The folding and sealing of the carton creates a raw paperboard edge which extends from the top 216 to the bottom of the carton 210 along this intersection of the sealing panel 222 and side panel 212b, top panel 214, top fin 216 and the bottom panel corresponding to side panel 212d.
FIG. 7 illustrates a blank 230 of the carton 210 of FIG. 6. The side panels 212a-d are separated from bottom panels 232a-d by bottom horizontal score lines 234 and each of the side panels 212a-d and bottom panels 232a-d are separated from each other by vertical score lines 236. The side panels 212a-d are separated from top panels 214a-d by top horizontal score lines 238. The top fin panels 216a-d are separated from top panels 214a-d by upper horizontal score line 239.
The sealing panel 222 is separated from side panel 212a by a vertical score line 236. A top sealing panel 222b and a bottom sealing panel 222c further define sealing panel 222. The raw paperboard edge 240 extends along the entire perimeter of the carton blank 230. However, for purposes of this invention, the most important portions of the raw paperboard edge 240 are portions 240a and 240b which lie on the bottom of the carton. All other portions of the raw paperboard edge 240 are either covered by a coated panel, or are elevated above the surface when the blank 230 is formed into a carton 210. Thus, moisture absorption by these portions of the raw paperboard edge 240 is highly unlikely.
FIG. 8 shows another embodiment of the elevated bottom of the present invention. The bottom of the carton 210 has the elevated portion 220 bounded by substantially planar portions 260 and 262. The planar portions 260 and 262 are substantially perpendicular to side panels 212a, 212b and 212c and 212d, not shown. The planar portions 260 and 262 contact a surface such as a conveyor belt on a packaging machine while the elevated portion 220 is elevated above the surface and any moisture thereon. The same applies during distribution of the carton whether in a crate or on a shelf at a store.
The elevated portion 220 is further defined by angled portions 264 and 266 and elevated planar portion 270. The elevated planar portion 270 is further 5 defined as elevated planar portion 270a and elevated planar portion 270b.
The elevated planar portion 270a substantially includes a portion of panel 232b while elevated planar portion 270b includes a portion of panel 232d. The exposed raw paperboard edge 240b traverses the bottom of the carton 210, extending from the end of panel 212a to the end of panel 212c, not shown. Likewise, the elevated 10 portion 220 traverses the bottom of the carton 210. Preferably, the elevated portion 220 is centered on the bottom of the carton 210 with planar portions and 262 being equal in area to each other. However, those skilled in the pertinent art will recognize that planar portions 260 and 262 may be unequal and elevated portion 220 may be uncentered without departing from the scope and spirit of the present invention.
It is readily apparent that elevated portion 270a_ angled portion 264 and planar portion 260 all are part of bottom panel 232b. Also, elevated portion 270b, angled portion 266 and planar portion 262 all are part of bottom panel 232d.
The exposed edge 240a is substantially perpendicular to exposed edge 240b. A side elevated/angled portion 220a elevates this exposed edge 240a thereby preventing moisture absorption as with exposed edge 240b. The side elevated/angled portion 220a has an angled portion 272 which engages planar portion 260, side panel 212a, and angled portion 264. Those skilled in the art will recognize that the exposed raw edges may be elevated in a similar fashion without -departing from the scope and content of the present invention.
Another embodiment of the elevated bottom of the carton of the present invention is shown in FIG. 9. The carton 210 of FIG. 9 is similar to the carton 210 of FIG. 8 except that approximately in the center of the elevated portion are secondary elevated portions 300 and 301. The secondary elevated portions 300 and 301 prevent loss of elevation in the center of the bottom of the carton 210 during transportation from a packaging machine to the retailer/wholesaler to the consumer. As is apparent, the center of the bottom of the carton 210 is most susceptible to deelevation from the weight of the product. The weight of the product in the carton 210 is focused on the center of the bottom of the carton 210.
and thus it is necessary to provide greater elevation in this area. This greater elevation is provided by the secondary elevated portions 300 and 301 which compensate for gravitational forces exerted by the product on the center of the bottom of the carton 210.
In an exemplary embodiment, the secondary elevated portions 300 and 301 are triangular in shape with apices 302a-b facing the center of the bottom of the carton 210. The secondary elevated portions 300 and 301 are substantially contained within elevated planar portions 270a and 270b. However, there is a transition for each secondary elevated portions 300 and 301 to angled portions and 264, respectively. Alternatively, the triangular shaped embodiment of the secondary elevated portions 300 and 301 may be rotated any degree from 1-360 degrees, about apices 302a-b while not departing from the scope and spirit of the present invention. Thus, the secondary elevated portions 300 and 301 may lie entirely within elevated planar portion 270b and 270a, respectively.
In this embodiment, the secondary elevated portions 300 and 301 are partially defined by secondary angled portions 304a-d. The secondary angled WO 99/20536 PCT/US98l22029 portions 304a-d form a transition from the secondary elevated portions 300 and 301 to the elevated planar portions 270b and 270a.
In an alternative embodiment not shown, the canon 210 of FIG. 9 may only have one secondary elevated portion 300 or 301 which may be disposed on either of planar portion 270a or 270b.
The bottom of the carton 210 is usually formed on a mandrel of a form, fi 11 and seal packaging machine, not shown. The carton blanks 230 are fed from a magazine, not shown, to a bottom forming station of the machine, not shown.
During the transfer from magazine to bottom forming station, the carton blank is erected. On the bottom forming station, the bottom panels are pretreated if necessary, and then heat sealed together to form the bottom. This is accomplished by pressing against the bottom panels as they lie on the mandrel. In order to achieve the elevated bottom of the present invention, one may have a special sealing plate and mandrel which allows for the elevated bottom of the present invention.
Claims (41)
1. A carton having a plurality of side panels, the plurality of side panels including at least a first pair of opposing side panels and a second pair of opposing side panels generally perpendicular to the first pair of opposing side panels, and a plurality of bottom panels, each bottom panel corresponding to an adjacent side panel, the plurality of bottom panels being folded and sealed together to form a sealed carton bottom, a last folded and sealed bottom panel having an exposed edge traversing the bottom of the carton, the carton comprising:
a primary elevated portion extending along a length of the exposed edge between the first pair of opposing side panels and generally parallel to the second pair of opposing side panels, the primary elevated portion being inverted into the carton and having an elevation;
a first substantially planar portion defined by one side of the primary elevated portion, the first pair of opposing side panels and one of the second pair of opposing side panels;
a second substantially planar portion defined by another side of the elevated portion, the first pair of opposing side panels and another of the second pair of side panels; and a secondary elevated portion disposed within the primary elevated portion, the secondary elevated portion being elevated a distance greater than the elevation of the primary elevated portion.
a primary elevated portion extending along a length of the exposed edge between the first pair of opposing side panels and generally parallel to the second pair of opposing side panels, the primary elevated portion being inverted into the carton and having an elevation;
a first substantially planar portion defined by one side of the primary elevated portion, the first pair of opposing side panels and one of the second pair of opposing side panels;
a second substantially planar portion defined by another side of the elevated portion, the first pair of opposing side panels and another of the second pair of side panels; and a secondary elevated portion disposed within the primary elevated portion, the secondary elevated portion being elevated a distance greater than the elevation of the primary elevated portion.
2. A carton having a plurality of side panels, the plurality of side panels including at least a first pair of opposing side panels and a second pair of opposing side panels generally perpendicular to the first pair of opposing side panels, and a plurality of bottom panels, each bottom panel corresponding to an adjacent side panel, the plurality of bottom panels being folded and sealed together to form a sealed carton bottom, a last folded and sealed bottom panel having a first exposed edge traversing the bottom of the carton and a second exposed edge substantially perpendicular to the first exposed edge, the carton comprising:
a primary elevated portion extending along a length of the first exposed edge between the first pair of opposing side panels and generally parallel to the second pair of opposing side panels, the primary elevated portion being inverted into the carton and having an elevation;
a side elevated portion extending along a length of the second exposed edge, the side elevated portion being inverted into the carton and having an elevation;
a first substantially planar portion defined by one side of the primary elevated portion, the first pair of opposing side panels and one of the second pair of opposing side panels;
a second substantially planar portion defined by another side of the primary elevated portion, the first pair of opposing side panels and another of the second pair of opposing side panels; and a secondary elevated portion disposed within the primary elevated portion, the secondary elevated portion being elevated a distance greater than the elevation of the primary elevated portion.
a primary elevated portion extending along a length of the first exposed edge between the first pair of opposing side panels and generally parallel to the second pair of opposing side panels, the primary elevated portion being inverted into the carton and having an elevation;
a side elevated portion extending along a length of the second exposed edge, the side elevated portion being inverted into the carton and having an elevation;
a first substantially planar portion defined by one side of the primary elevated portion, the first pair of opposing side panels and one of the second pair of opposing side panels;
a second substantially planar portion defined by another side of the primary elevated portion, the first pair of opposing side panels and another of the second pair of opposing side panels; and a secondary elevated portion disposed within the primary elevated portion, the secondary elevated portion being elevated a distance greater than the elevation of the primary elevated portion.
3. The carton according to claim 1 or 2, wherein the primary elevated portion further comprises a first angled portion engaging the first substantially planar portion, and a second angled portion engaging the second substantially planar portion.
4. The carton according to claim 3, wherein the primary elevated portion further comprises an elevated planar portion engaging the first and second angled portions, the primary elevated planar portion lying on a plane inverted into the carton.
5. The carton according to claim 3 or 4, wherein the side elevated portion engages the second angled portion.
6. The carton according to any one of claims 1 to 5, wherein the secondary elevated portion is triangular in shape.
7. The carton according to any one of claims 1 to 6, further comprising a plurality of secondary angled portions forming a transition from the secondary elevated portion to the primary elevated portion.
8. The carton according to any one of claims 1 to 7, wherein the secondary elevated portion is formed at a center of the bottom of the carton.
9. The carton according to any one of claims 1 to 8, wherein the first and second substantially planar portions are substantially equal in area.
10. The carton according to any one of claims 1 to 9, wherein the exposed edge is off-center with respect to the center of the primary elevated portion.
11. A carton having a plurality of side panels, the plurality of side panels including at least a first pair of opposing side panels and a second pair of opposing side panels generally perpendicular to the first pair of opposing side panels, and a plurality of bottom panels, each bottom panel corresponding to an adjacent side panel, the plurality of bottom panels being folded and sealed together to form a sealed carton bottom, a last folded and sealed bottom panel having a plurality of exposed edges, the carton comprising:
a plurality of primary elevated portions, each of the plurality of primary elevated portions corresponding to an associated one of the exposed edges, each of the primary elevated portions having an elevation; and a secondary elevated portion disposed within one of the plurality of primary elevated portions, the secondary elevated portion being elevated a distance greater than the elevation of the primary elevated portion within which it is disposed.
a plurality of primary elevated portions, each of the plurality of primary elevated portions corresponding to an associated one of the exposed edges, each of the primary elevated portions having an elevation; and a secondary elevated portion disposed within one of the plurality of primary elevated portions, the secondary elevated portion being elevated a distance greater than the elevation of the primary elevated portion within which it is disposed.
12. The carton according to claim 11, wherein the secondary elevated portion is triangular in shape.
13. The carton according to claim 11 or 12, further comprising a plurality of secondary angled portions forming a transition from the secondary elevated portion to the primary elevated portion.
14. The carton according to claim 11, 12 or 13, wherein the secondary elevated portion is in the center of the bottom of the carton.
15. A carton for a liquid food product, the carton having first, second, third and fourth side panels, each side panel ending at a corresponding bottom panel, first and third opposing bottom panels folded under second and fourth opposing bottom panels, the fourth bottom panel having a first exposed edge of paperboard or paper transversing the bottom of the carton from the end of the first side panel to the end of the third side panel and a second exposed edge of paperboard or paper substantially perpendicular to the first exposed edge, the carton comprising:
a first elevated portion extending along the length of the first exposed edge from the end of the first side panel to the end of the third side panel, the first elevated portion being inverted into the carton thereby inverting the first exposed edge, the first exposed edge lying on a first horizontal plane;
a second elevated portion extending along the entire length of the second exposed edge, the second elevated portion being inverted into the carton thereby inverting the second exposed edge, the second exposed edge lying on the first horizontal plane;
a first substantially planar portion defined by one side of the elevated portion and the ends of the fourth side panel and portions of the first and third side panels, the first substantially planar portion being substantially perpendicular to the corresponding side panels and lying on a second horizontal plane; and a second substantially planar portion defined by an opposing side of the elevated portion and the ends of the second side panel and portions of the first and third side panels, the second substantially planar portion being substantially perpendicular to the corresponding side panels and lying on the second horizontal plane;
wherein the first substantially planar portion and the second substantially planar portion define an area on the bottom of the carton larger than the first and second elevated portions and whereby the first horizontal plane lies above the second horizontal plane.
a first elevated portion extending along the length of the first exposed edge from the end of the first side panel to the end of the third side panel, the first elevated portion being inverted into the carton thereby inverting the first exposed edge, the first exposed edge lying on a first horizontal plane;
a second elevated portion extending along the entire length of the second exposed edge, the second elevated portion being inverted into the carton thereby inverting the second exposed edge, the second exposed edge lying on the first horizontal plane;
a first substantially planar portion defined by one side of the elevated portion and the ends of the fourth side panel and portions of the first and third side panels, the first substantially planar portion being substantially perpendicular to the corresponding side panels and lying on a second horizontal plane; and a second substantially planar portion defined by an opposing side of the elevated portion and the ends of the second side panel and portions of the first and third side panels, the second substantially planar portion being substantially perpendicular to the corresponding side panels and lying on the second horizontal plane;
wherein the first substantially planar portion and the second substantially planar portion define an area on the bottom of the carton larger than the first and second elevated portions and whereby the first horizontal plane lies above the second horizontal plane.
16. The carton according to claim 15, wherein the first elevated portion further comprises a first angled portion engaging the first substantially planar portion, and a second angled portion engaging the second substantially planar portion.
17. The carton according to claim 16, wherein the first elevated portion further comprises an elevated planar portion engaging the first and second angled portions, the first elevated planar portion lying on a plane inverted into the carton.
18. The carton according to claim 15, 16 or 17, wherein the first and second substantially planar portions are substantially equal in area.
19. The carton according to any one of claims 15 to 18, wherein the second elevated portion engages the second angled portion.
20. The carton according to any one of claims 15 to 19, wherein the first substantially planar portion defines an area of the bottom of the carton larger than the area defined by the first and second elevated portions combined.
21. A carton having a plurality of side panels and a plurality of bottom panels corresponding thereto, the plurality of bottom panels folded and sealed together to form a sealed bottom, the carton having a first exposed edge traversing the bottom of the carton and a second exposed edge substantially perpendicular to the first exposed edge, the carton comprising:
a primary elevated portion extending along a length of the first exposed edge, the elevated portion being inverted into the carton;
a first substantially planar portion defined by one side of the elevated portion and the ends of the side panels corresponding thereto, the first substantially planar portion being substantially perpendicular to the corresponding side panels;
a second substantially planar portion defined by another side of the elevated portion and the ends of the side panels corresponding thereto, the second substantially planar portion being substantially perpendicular to the corresponding side panels; and a side angled portion extending along the length of the second exposed edge, the side angled portion being inverted into the carton forming an obtuse angle with one of said first and second substantially planar portions.
a primary elevated portion extending along a length of the first exposed edge, the elevated portion being inverted into the carton;
a first substantially planar portion defined by one side of the elevated portion and the ends of the side panels corresponding thereto, the first substantially planar portion being substantially perpendicular to the corresponding side panels;
a second substantially planar portion defined by another side of the elevated portion and the ends of the side panels corresponding thereto, the second substantially planar portion being substantially perpendicular to the corresponding side panels; and a side angled portion extending along the length of the second exposed edge, the side angled portion being inverted into the carton forming an obtuse angle with one of said first and second substantially planar portions.
22. The carton according to claim 21, including a first angled portion extending between the primary elevated portion and the first substantially planar portion, and a second angled portion extending between the second substantially planar portion and the primary elevated portion.
23. The carton according to claim 22, wherein the primary elevated portion further comprises a first elevated planar portion engaging the first angled portion, and a second elevated planar portion engaging the second angled portion, the first elevated planar portion lying on a first plane and the second elevated planar portion lying on a second plane that is not coplanar with the first plane.
24. The carton according to claim 21, 22 or 23, wherein the first and second substantially planar portions are substantially equal in area.
25. The carton according to any one of claims 21 to 24, wherein the first exposed edge is asymmetrically disposed on a center of the primary elevated portion.
26. The carton according to any one of claims 21 to 25, including a first secondary elevated portion disposed within the primary elevated portion, the secondary elevated portion being elevated a distance greater than an elevation of the primary elevated portion.
27. The carton according to claim 26, including a plurality of secondary angled portions forming a transition from the first secondary elevated portion to the primary elevated portion.
28. The carton according to claim 26 or 27, including a second secondary elevated portion disposed on the primary elevated portion in opposing relation to the secondary elevated portion.
29. The carton according to any one of claims 21 to 28, wherein the primary elevated portion defines a plane that is generally parallel to and spaced from a plane defined by the first substantially planar portion and a plane defined by the second substantially planar portion.
30. A carton having a plurality of side panels and a plurality of bottom panels corresponding thereto, the plurality of bottom panels folded and sealed together to form a sealed bottom, a last folded and sealed bottom panel having a first exposed edge traversing the bottom of the carton and a penultimate folded and sealed bottom panel having a second exposed edge substantially perpendicular to the first exposed edge, the carton comprising:
a primary elevated portion extending along the length of the first exposed edge, the primary elevated portion being inverted into the carton;
a side elevated portion extending along the length of the second exposed edge, the side elevated portion being inverted into the carton;
a first substantially planar portion defined by one side of the primary elevated portion and the ends of side panels corresponding thereto, the first substantially planar portion being substantially perpendicular to the corresponding side panels;
a second substantially planar portion defined by another side of the primary elevated portion and the ends of side panels corresponding thereto, the second substantially planar portion being substantially perpendicular to the corresponding side panels, said side elevated portion forming an obtuse angle with one of said first and second substantially planar portions; and a first secondary elevated portion disposed within the primary elevated portion, the secondary elevated portion being inverted into the carton a depth greater than a depth of the primary elevated portion.
a primary elevated portion extending along the length of the first exposed edge, the primary elevated portion being inverted into the carton;
a side elevated portion extending along the length of the second exposed edge, the side elevated portion being inverted into the carton;
a first substantially planar portion defined by one side of the primary elevated portion and the ends of side panels corresponding thereto, the first substantially planar portion being substantially perpendicular to the corresponding side panels;
a second substantially planar portion defined by another side of the primary elevated portion and the ends of side panels corresponding thereto, the second substantially planar portion being substantially perpendicular to the corresponding side panels, said side elevated portion forming an obtuse angle with one of said first and second substantially planar portions; and a first secondary elevated portion disposed within the primary elevated portion, the secondary elevated portion being inverted into the carton a depth greater than a depth of the primary elevated portion.
31. The carton according to claim 30, wherein the first secondary elevated portion is triangular in shape.
32. The carton according to claim 30 or 31, further comprising a plurality of secondary angled portions forming a transition from the secondary elevated portion to the primary elevated portion.
33. The carton according to claim 30, 31 or 32, wherein the primary elevated portion further comprises a first angled portion extending therefrom to the first substantially planar portion, and a second angled portion extending from the primary elevated portion to the second substantially planar portion.
34. The carton according to claim 33, wherein the primary elevated portion further comprises a first elevated planar portion engaging the first angled portion, and a second elevated planar portion engaging the second angled portion, the first elevated planar portion lying on a first plane and the second elevated planar portion lying on a second plane, the first and second planes being non-coplanar.
35. The carton according to claim 34, further comprising a second secondary elevated portion disposed on the second elevated planar portion of the primary elevated portion and opposite of the first secondary elevated portion, the second secondary elevated portion disposed on the first elevated planar portion.
36. The carton according to claim 33, 34 or 35, wherein the side elevated portion engages the second angled portion.
37. The carton according to any one of claims 30 to 36, wherein the first secondary elevated portion is disposed at a center of the bottom of the carton.
38. A carton having a plurality of side panels and a plurality of bottom panels corresponding thereto, the plurality of bottom panels folded and sealed together to form a sealed bottom, a last folded and sealed bottom panel having a first exposed edge traversing the bottom of the carton and a penultimate folded and sealed bottom panel having a second exposed edge substantially perpendicular to the first exposed edge, the carton comprising:
a primary elevated portion extending along a length of the first exposed edge, the primary elevated portion being inverted into the carton;
a side elevated portion extending along a length of the second exposed edge, the side elevated portion being inverted into the carton;
a first substantially planar portion defined by one side of the primary elevated portion and the ends of the side panels corresponding thereto, the first substantially planar portion being substantially perpendicular to the corresponding side panels;
a second substantially planar portion defined by another side of the primary elevated portion and the ends of the side panels corresponding thereto, the second substantially planar portion being substantially perpendicular to the corresponding side panels, said side elevated portion forming an obtuse angle with one of said first and second substantially planar portions;
a first secondary elevated portion disposed within the primary elevated portion, the first secondary elevated portion being inverted into the carton a depth that is greater than a depth of the primary elevated portion; and a second secondary elevated portion disposed within the primary elevated portion and opposite the first secondary elevated portion, the second secondary elevated portion being inverted into the carton a depth that is greater than a depth of the primary elevated portion.
a primary elevated portion extending along a length of the first exposed edge, the primary elevated portion being inverted into the carton;
a side elevated portion extending along a length of the second exposed edge, the side elevated portion being inverted into the carton;
a first substantially planar portion defined by one side of the primary elevated portion and the ends of the side panels corresponding thereto, the first substantially planar portion being substantially perpendicular to the corresponding side panels;
a second substantially planar portion defined by another side of the primary elevated portion and the ends of the side panels corresponding thereto, the second substantially planar portion being substantially perpendicular to the corresponding side panels, said side elevated portion forming an obtuse angle with one of said first and second substantially planar portions;
a first secondary elevated portion disposed within the primary elevated portion, the first secondary elevated portion being inverted into the carton a depth that is greater than a depth of the primary elevated portion; and a second secondary elevated portion disposed within the primary elevated portion and opposite the first secondary elevated portion, the second secondary elevated portion being inverted into the carton a depth that is greater than a depth of the primary elevated portion.
39. The carton according to claim 38, wherein the primary elevated portion further comprises a first angled portion extending therefrom to the first substantially planar portion, and a second angled portion extending from the primary elevated portion to the second substantially planar portion.
40. The carton according to claim 38 or 39, further comprising a plurality of secondary angled portions forming a transition from the first and second secondary elevated portions to the primary elevated portion.
41. The carton according to claim 38, 39 or 40, wherein the primary elevated portion further comprises a first elevated planar portion engaging the first angled portion, and a second elevated planar portion engaging the second angled portion, the first elevated planar portion lying on a first plane and the second elevated planar portion lying on a second plane, the first and second planes being non-coplanar.
Applications Claiming Priority (7)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US08/955,063 US5845840A (en) | 1997-10-21 | 1997-10-21 | Elevated bottom carton |
| US09/052,401 US5988490A (en) | 1997-10-21 | 1998-03-31 | Elevated bottom carton |
| US09/052,401 | 1998-03-31 | ||
| US09/128,748 US6027015A (en) | 1997-10-21 | 1998-08-04 | Elevated bottom carton |
| US09/128,748 | 1998-08-04 | ||
| US08/955,063 | 1998-08-04 | ||
| PCT/US1998/022029 WO1999020536A1 (en) | 1997-10-21 | 1998-10-19 | Elevated bottom carton |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CA2308583A1 CA2308583A1 (en) | 1999-04-29 |
| CA2308583C true CA2308583C (en) | 2005-04-12 |
Family
ID=27368126
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002308583A Expired - Fee Related CA2308583C (en) | 1997-10-21 | 1998-10-19 | Elevated bottom carton |
Country Status (11)
| Country | Link |
|---|---|
| EP (1) | EP0999983B1 (en) |
| JP (1) | JP4225687B2 (en) |
| AT (1) | ATE296231T1 (en) |
| AU (1) | AU1100999A (en) |
| BR (1) | BR9814089A (en) |
| CA (1) | CA2308583C (en) |
| DE (1) | DE69830316T2 (en) |
| DK (1) | DK0999983T3 (en) |
| ES (1) | ES2241174T3 (en) |
| NO (1) | NO325838B1 (en) |
| WO (1) | WO1999020536A1 (en) |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3586232A (en) * | 1969-02-06 | 1971-06-22 | Pneumatic Scale Corp | Carton |
| GB8901319D0 (en) * | 1989-01-21 | 1989-03-15 | Elopak Systems | Packaging |
| JP3002753B2 (en) | 1991-02-05 | 2000-01-24 | 四国化工機株式会社 | Paper-based laminate container and bottom crimping device therefor |
| US5482204A (en) | 1994-03-21 | 1996-01-09 | International Paper Company | Carton bottom sealer |
| US5762595A (en) * | 1996-10-01 | 1998-06-09 | Elopak Systems Ag | Flat-sitting container bottom end closure and mechanism for forming same |
| US6739499B1 (en) * | 1997-06-11 | 2004-05-25 | Nimco Corporation | Method and apparatus for forming a stable container bottom |
-
1998
- 1998-10-19 DK DK98953694T patent/DK0999983T3/en active
- 1998-10-19 ES ES98953694T patent/ES2241174T3/en not_active Expired - Lifetime
- 1998-10-19 AT AT98953694T patent/ATE296231T1/en active
- 1998-10-19 AU AU11009/99A patent/AU1100999A/en not_active Abandoned
- 1998-10-19 CA CA002308583A patent/CA2308583C/en not_active Expired - Fee Related
- 1998-10-19 EP EP98953694A patent/EP0999983B1/en not_active Expired - Lifetime
- 1998-10-19 DE DE69830316T patent/DE69830316T2/en not_active Expired - Lifetime
- 1998-10-19 BR BR9814089-2A patent/BR9814089A/en not_active IP Right Cessation
- 1998-10-19 JP JP2000516890A patent/JP4225687B2/en not_active Expired - Fee Related
- 1998-10-19 WO PCT/US1998/022029 patent/WO1999020536A1/en not_active Ceased
-
2000
- 2000-04-14 NO NO20001968A patent/NO325838B1/en not_active IP Right Cessation
Also Published As
| Publication number | Publication date |
|---|---|
| JP4225687B2 (en) | 2009-02-18 |
| NO20001968D0 (en) | 2000-04-14 |
| CA2308583A1 (en) | 1999-04-29 |
| WO1999020536A1 (en) | 1999-04-29 |
| NO20001968L (en) | 2000-04-14 |
| DE69830316D1 (en) | 2005-06-30 |
| ES2241174T3 (en) | 2005-10-16 |
| DK0999983T3 (en) | 2005-08-08 |
| DE69830316T2 (en) | 2006-03-09 |
| BR9814089A (en) | 2000-10-03 |
| NO325838B1 (en) | 2008-07-28 |
| EP0999983A1 (en) | 2000-05-17 |
| JP2002511363A (en) | 2002-04-16 |
| ATE296231T1 (en) | 2005-06-15 |
| AU1100999A (en) | 1999-05-10 |
| EP0999983B1 (en) | 2005-05-25 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EEER | Examination request | ||
| MKLA | Lapsed |
Effective date: 20181019 |