WO2002044044A2 - Sac en matiere plastique comprenant a son sommmet une fermeture de scellement permanent - Google Patents

Sac en matiere plastique comprenant a son sommmet une fermeture de scellement permanent Download PDF

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Publication number
WO2002044044A2
WO2002044044A2 PCT/CA2001/001660 CA0101660W WO0244044A2 WO 2002044044 A2 WO2002044044 A2 WO 2002044044A2 CA 0101660 W CA0101660 W CA 0101660W WO 0244044 A2 WO0244044 A2 WO 0244044A2
Authority
WO
WIPO (PCT)
Prior art keywords
longitudinal
longitudinal groove
tongue
disposed
barb
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.)
Ceased
Application number
PCT/CA2001/001660
Other languages
English (en)
Other versions
WO2002044044A3 (fr
Inventor
Dean Scaratt
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Rayton Packaging Inc
Original Assignee
Rayton Packaging Inc
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Rayton Packaging Inc filed Critical Rayton Packaging Inc
Priority to AU2002221379A priority Critical patent/AU2002221379A1/en
Publication of WO2002044044A2 publication Critical patent/WO2002044044A2/fr
Publication of WO2002044044A3 publication Critical patent/WO2002044044A3/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

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
    • B65D33/00—Details of, or accessories for, sacks or bags
    • B65D33/16—End- or aperture-closing arrangements or devices
    • B65D33/25—Riveting; Dovetailing; Screwing; using press buttons or slide fasteners
    • B65D33/2508—Riveting; Dovetailing; Screwing; using press buttons or slide fasteners using slide fasteners with interlocking members having a substantially uniform section throughout the length of the fastener; Sliders therefor
    • B65D33/2566—Riveting; Dovetailing; Screwing; using press buttons or slide fasteners using slide fasteners with interlocking members having a substantially uniform section throughout the length of the fastener; Sliders therefor using two or more independently operable slide fasteners
    • 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
    • B65D33/00—Details of, or accessories for, sacks or bags
    • B65D33/16—End- or aperture-closing arrangements or devices
    • B65D33/25—Riveting; Dovetailing; Screwing; using press buttons or slide fasteners
    • B65D33/2508—Riveting; Dovetailing; Screwing; using press buttons or slide fasteners using slide fasteners with interlocking members having a substantially uniform section throughout the length of the fastener; Sliders therefor
    • B65D33/2516—Riveting; Dovetailing; Screwing; using press buttons or slide fasteners using slide fasteners with interlocking members having a substantially uniform section throughout the length of the fastener; Sliders therefor comprising tamper-indicating means, e.g. located within the fastener
    • B65D33/2533—Riveting; Dovetailing; Screwing; using press buttons or slide fasteners using slide fasteners with interlocking members having a substantially uniform section throughout the length of the fastener; Sliders therefor comprising tamper-indicating means, e.g. located within the fastener the slide fastener being located between the product compartment and the tamper indicating means
    • 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
    • B65D33/00—Details of, or accessories for, sacks or bags
    • B65D33/16—End- or aperture-closing arrangements or devices
    • B65D33/25—Riveting; Dovetailing; Screwing; using press buttons or slide fasteners
    • B65D33/2508—Riveting; Dovetailing; Screwing; using press buttons or slide fasteners using slide fasteners with interlocking members having a substantially uniform section throughout the length of the fastener; Sliders therefor
    • B65D33/2541—Riveting; Dovetailing; Screwing; using press buttons or slide fasteners using slide fasteners with interlocking members having a substantially uniform section throughout the length of the fastener; Sliders therefor characterised by the slide fastener, e.g. adapted to interlock with a sheet between the interlocking members having sections of particular shape

Definitions

  • This invention relates generally to plastic bags and, more specifically, to plastic bags having zipper openings.
  • Plastic bags having plastic "zipper” operiings have had enormous popularity over the last 20 years. Such plastic bags can be repeatedly unsealed and resealed without the necessity of tools and without extraneous devices (such as twist ties, tape, etc.).
  • plastic bags An important use of such plastic bags is for packaging fruits and vegetables prior to shipment to market.
  • the state-of-the-art for packaging fruits and vegetables was to load plastic bags through a bottom opening and then seal the bottom opening using heat sealing devices, or using adhesives or plastic tape.
  • All such prior art sealing methods have their drawbacks.
  • Heat sealing equipment is expensive, slow, cumbersome and difficult to use in the field.
  • Adhesives and plastic tapes have additional disadvantages. For one thing, adhesives and plastic tapes are difficult to keep clean when packaging is conducted in dusty environments, such as outdoors or in warehouses. Also, adhesives and plastic tapes are often ineffective and/or difficult to work in excessively cold, hot or humid environments.
  • the invention satisfies this need.
  • the invention is a plastic bag having an upper portion and a lower portion, the plastic bag comprising (a) a front wall and a rear wall, both walls being comprised of a flexible thermoplastic material and having a top edge, a bottom-most portion, a first side edge and an opposed second side edge, the first side edge of the front wall being attached to the first side edge of the rear wall, the second side edge of the front wall being attached to the second side edge of the rear wall and the bottom-most portion of the front wall being attached to the bottom-most portion of the rear wall so that the front wall and the rear wall are disposed opposite to one another and cooperate to define an interior bag compartment having an opening between the opposed top edges, (b) a plastic reopenable zipper disposed in the upper portion of the plastic bag capable of alternatively sealing and unsealing the front and rear walls, (c) a first longitudinal groove disposed between the reopenable zipper and the top edge of either the front wall or the rear wall, the first longitudinal groove being disposed
  • the terms "permanently sealed” and “one-time sealing mechanism” are meant to connote a seal or sealing mechanism which cannot be opened by grasping the opposite walls of the bag proximate to the "one-time sealing mechanism” and pulling at those walls in opposite directions. That is, the plastic material which comprises one or both walls fails before the sealing mechanism can be opened in this manner.
  • the first longitudinal tongue has at least one bulbous upper portion and the longitudinal groove has one or more corresponding expanded lower portions.
  • the plastic bag further comprises: (a) a second longitudinal groove disposed between the reopenable zipper and the top edge of the wall having the first longitudinal tongue and disposed in parallel with the first longitudinal tongue; and (b) a second longitudinal tongue disposed between the reopenable zipper and the top edge of the wall opposite the wall having the second longitudinal groove and disposed in parallel with the first longitudinal groove, the second longitudinal tongue being disposed, sized and dimensioned to mate with the second longitudinal groove.
  • the second longitudinal tongue has a bulbous upper portion and the second longitudinal has an expanded lower portion. It is preferred that both longitudinal tongues have opposed barb edges which mate with corresponding barb receiving spaces within the longitudinal grooves.
  • the invention has been found to provide an efficient method of packaging fruits and vegetables in bags, even in dusty packaging locations or in excessively cold, hot or humid locations.
  • the invention always provides a tidy and aesthetically pleasing appearance.
  • the invention avoids the problem in the prior art of materials inadvertently falling out of the bottom of the bag.
  • Figure 1 is a perspective view of a plastic bag having features of the invention
  • Figure 2 is a cross-sectional view of the plastic bag of Figure 1 taken along line 2-2;
  • Figure 3A is a cross-sectional detail view of a one-time sealing mechanism useable in the invention, taken along line 3-3 in Figure 1;
  • Figure 3B is a cross-sectional detail view of a second one-time sealing mechanism useable in the invention, taken along line 3-3 in Figure 1;
  • Figure 3C is a cross-sectional detail view of a third one-time sealing mechanism useable in the invention, taken along line 3-3 in Figure 1 ;
  • Figure 4 is a cross-sectional side detail view of the bottom most portion of the plastic bag, taken along line B-B in Figure 1. DESCRD7TION OF THE INVENTION
  • the invention is a plastic bag 10 having an upper portion 48 and a lower portion 50.
  • the plastic bag 10 comprises a front wall 12, a rear wall 14, a plastic reopenable zipper 16 and a tongue-and-groove, one-time sealing mechanism 18.
  • the front wall 12 and rear wall 14 are generally comprised of a flexible thermoplastic material, such as low density polyethylene, linear low density polyethylene or other similar flexible material known in the art to be useable in the construction of a plastic bag.
  • a flexible thermoplastic material such as low density polyethylene, linear low density polyethylene or other similar flexible material known in the art to be useable in the construction of a plastic bag.
  • both walls 12 and 14 have a top edge 20, a bottom-most portion 22, a first side edge 24 and an opposed second side edge 26.
  • the first side edge 22 of the front wall 12 is attached to the first side edge 24 of the rear wall 14
  • the second side edge 26 of the front wall 12 is attached to the second side edge 26 of the rear wall 14
  • the bottom-most portion 22 of the front wall 12 is attached to the bottom-most portion 22 of the rear wall 14, so that the front wall 12 and the rear wall 14 are disposed opposite to one another and cooperate to define an interior bag compartment 28, having an opening between the opposed top edges 20.
  • the front wall 12 and the rear wall 14 are integral as illustrated in Figure 6.
  • the front wall 12 and the rear wall 14 are formed from a single sheet of plastic 52 folded in half to form the bottom 54 of the plastic bag 10. Forming the bottom 54 of the plastic bag 10 in this fashion gives the bottom 54 of the plastic bag 10 increased strength over bottoms 54 of plastic bags 10 formed by sealing the bottom- most portions 22 of separate front walls 12 and rear walls 14.
  • FIG. 7 is a cross-sectional view of a typical reopenable zipper 16.
  • zipper it is meant those plastic bag sealing devices generally known in the art having a longitudinal tongue disposed on one plastic edge sized and dimensioned to mate with an opposed longitudinal groove disposed on an opposing edge.
  • the longitudinal tongue and the longitudinal groove are sized and dimensioned so that, when the tongue is disposed within the groove, a tight seal is provided, but the tongue can readily be removed from the groove without the use of special tools and later re-sealed, also without the use of special tools.
  • the one-time sealing mechanism 18 comprises a first longitudinal groove 30 and a first longitudinal tongue 32.
  • the first longitudinal groove 30 is disposed between the reopenable zipper 16 and the top edge 20 of either the front wall 12 or the rear wall 14.
  • the first longitudinal tongue 32 is disposed between the reopenable zipper 16 and the top edge 20 of the wall 12 or 14 opposite the wall 12 or 14 having the first longitudinal groove 30.
  • the first longitudinal tongue 32 is disposed, sized and dimensioned to mate with the first longitudinal groove 30, in such a way that the front and rear walls 12 and 14 can be permanently sealed near the top edges 20.
  • the rear wall 14 contains the first longitudinal groove 30 and the front wall 12 contains the first longitudinal tongue 32, or vice- versa. It is important only that one of the two walls 12 or 14 has the first longitudinal groove 30 and the opposite wall 12 or 14 has a corresponding first longitudinal tongue 32.
  • the first longitudinal tongue 32 has a bulbous upper portion 34 and the first longitudinal groove 30 has a corresponding expanded lower portion 36, so that the first longitudinal tongue 32 fits snugly within the first longitudinal groove 30.
  • the first longitudinal tongue 32 has at least one barb edge 37 extending along its length
  • the first longitudinal groove 30 has at least one corresponding barb receiving space 38 so that, when the first longitudinal tongue 32 is disposed within the first longitudinal groove 30, the barb edge 37 on the first longitudinal tongue 32 mates with the barb receiving space 38 on the longitudinal groove 30, thereby preventing the first longitudinal tongue 32 from being removed from the first longitudinal groove 30.
  • the first longitudinal tongue 32 has two opposed barb edges 37 and the first longitudinal groove 30 has two corresponding opposed barb receiving spaces 38.
  • Such a design provides increased assurance that the first longitudinal tongue 32 cannot be removed from the first longitudinal groove 30 once the first longitudinal tongue 32 is mated with the first longitudinal groove 30.
  • the plastic bag 10 further comprise a second longitudinal groove 40 disposed between the reopenable zipper 16 and the top edge 20 of the wall 12 or 14 having the first longitudinal tongue 32.
  • the second longitudinal groove 40 is disposed in parallel with the first longitudinal tongue 32.
  • the plastic bag 10 also comprises a second longitudinal tongue 42 disposed between the reopenable zipper 16 and the top edge 20 of the wall 12 or 14 having the first longitudinal groove 30 and disposed in parallel with the first longitudinal groove 30.
  • the second longitudinal tongue 42 is disposed, sized and dimensioned to mate with the second longitudinal groove 42.
  • the second longitudinal tongue 42 preferably has at least one barb edge 44, more preferably a pair of opposed barb edges
  • the height H of the first longitudinal tongue 32 and the second longitudinal tongue 42 is about 0.134 mm, and the corresponding depth D of the first longitudinal groove and the second longitudinal groove is about 0.134 mm. It is further typical that the width W x of the bulbous upper portion 34 of the first longitudinal tongue 32 and the second longitudinal tongue 42 is about 0.134 mm and the width W 2 of corresponding expanded lower portion of the first longitudinal groove 30 and the second longitudinal groove 40 is about 0.136 mm.
  • the length of the barb edges 37 are typically 0.034 mm and are preferably angled with respect to a longitudinal axis 47 of the first longitudinal tongue 32 and the second longitudinal tongue 42 by an angle «, which is less than about 90°, preferably, less than about 75°.
  • the overall width A of the one-time sealing mechanism 18 is typically about 0.543 mm
  • the overall thickness B is typically about 0.260 mm
  • the thickness of one side C is typically about 0.197 mm
  • the width D of one side is typically about 0.465 mm.
  • Figure 3B illustrates an alternative one-time sealing mechanism 18 useable in the invention.
  • one of the two walls 12 or 14 has a pair of longitudinal tongues 32, each having a bulbous portion 34 with a cross-sectional arrowlike shape having two opposed barb edges 37.
  • a pair of aligned longitudinal grooves 30 In the wall 12 or 14 opposite the wall 12 or 14 comprising the pair of longitudinal tongues 32 are disposed a pair of aligned longitudinal grooves 30.
  • Each longitudinal groove 30 has an expanded lower portion 36 with a pair of opposed inwardly-directed clamping arms 35, sized and dimensioned to accept and then firmly retain each respective longitudinal tongue 32.
  • Each longitudinal groove 30 has a pair of barb receiving spaces 38.
  • the combined thickness J of the one-time sealing mechamsm 18 (including the thickness of the first wall and the second wall) is about 0.070 inches.
  • the overall thickness K of the one-time sealing mechanism 18 is about 0.128 inches.
  • FIG. 3C illustrates yet another one-time sealing mechanism 18 useable in the invention.
  • both walls 12 and 14 contain an identical sealing mechanism moiety 39.
  • the two sealing moieties 39 are disposed opposite one another.
  • both moieties 39 comprise a pair of interior longitudinal tongues 32 and a single exterior longitudinal tongue 41.
  • Each interior tongue 32 has a bulbous portion
  • both moieties 39 define a pair of longitudinal grooves 30 disposed between pairs of tongues 32 and 41.
  • Each longitudinal groove 30 has an expanded lower portion 36 defining a single barb receiving space 38.
  • the overall thickness M of the one-time sealing mechamsm 18 is about 0.07 inches and the overall width N of the one-time sealing mechamsm 18 is about 0.127 inches.
  • the height P of each moiety 39 at each internal longitudinal tongue 32 is about 0.053 inches and the width Q of each moiety 39 is about 0.110 inches.
  • the front wall 12 of the plastic bag 10 is printed with instructions which instruct the user to cut away the one-time sealing mechanism 18 (or tear along a perforated line disposed between the one-time mechamsm 18 and the reopenable zipper 16) to gain access to the interior bag compartment 28. It is also typical that the front wall 12 is printed with further instructions, instructing the user to reseal the plastic bag 10 after use by sealing the resealable zipper 16.
  • the plastic bag 10 of the invention has been found to provide a most convenient method of packaging fruits and vegetables, even in highly dusty environments or in excessively cold, hot or humid environments.
  • the packer fills the plastic bag 10 with fruits or vegetables (or some other commodity) through the top opening.
  • the one-time sealing mechanism 18 is permanently sealed by mating the longitudinal tongue 32 or tongues 32 and 42 with the corresponding longitudinal groove 30 or grooves 30 and 40.
  • the bag 10 is thereby made ready for delivery to a retail establishment.
  • a retail worker may lift each plastic bag 10 from its respective shipping box.
  • the retailer worker may display the plastic bags in the shipping box and a customer may lift a plastic bag 10 from the shipping box.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Bag Frames (AREA)

Abstract

Ce sac en matière plastique (10) comprend une fermeture en matière plastique, réversible (16) située sur la portion supérieure du sac, ainsi qu'un mécanisme de fermeture en matière plastique à emploi unique (19) situé entre le sommet du sac (20) et la fermeture pouvant être rouverte, de manière à constituer un scellement permanent, à emploi unique, sur les bords supérieurs du sac. Ce scellement est tel qu'il ne peut être brisé sans endommager de façon visible le sac.
PCT/CA2001/001660 2000-11-28 2001-11-21 Sac en matiere plastique comprenant a son sommmet une fermeture de scellement permanent Ceased WO2002044044A2 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU2002221379A AU2002221379A1 (en) 2000-11-28 2001-11-21 Plastic bag with permanent sealing zipper at the top of the bag

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US72382700A 2000-11-28 2000-11-28
US09/723,827 2000-11-28

Publications (2)

Publication Number Publication Date
WO2002044044A2 true WO2002044044A2 (fr) 2002-06-06
WO2002044044A3 WO2002044044A3 (fr) 2002-10-03

Family

ID=24907859

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CA2001/001660 Ceased WO2002044044A2 (fr) 2000-11-28 2001-11-21 Sac en matiere plastique comprenant a son sommmet une fermeture de scellement permanent

Country Status (2)

Country Link
AU (1) AU2002221379A1 (fr)
WO (1) WO2002044044A2 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2013019619A1 (fr) * 2011-07-29 2013-02-07 Illinois Tool Works Inc. Sac à fermeture de sécurité/à sécurité enfant
JP2013139279A (ja) * 2012-01-04 2013-07-18 C I Kasei Co Ltd 嵌合具及び嵌合具付き袋体
JP2013180825A (ja) * 2012-03-05 2013-09-12 C I Kasei Co Ltd 嵌合具及び嵌合具付き袋体

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5851071A (en) 1997-09-11 1998-12-22 Rayton Packaging, Inc. Plastic bag with permanent sealing zipper

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH08198279A (ja) * 1995-01-17 1996-08-06 Nakajima Poriechiren Kogyo Kk 母乳等用保存袋
JPH10139050A (ja) * 1996-11-11 1998-05-26 Idemitsu Petrochem Co Ltd 咬合具付き袋
US6004032A (en) * 1998-06-30 1999-12-21 Reynolds Consumer Products, Inc. Tamper-evident closure arrangements and methods

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5851071A (en) 1997-09-11 1998-12-22 Rayton Packaging, Inc. Plastic bag with permanent sealing zipper

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2013019619A1 (fr) * 2011-07-29 2013-02-07 Illinois Tool Works Inc. Sac à fermeture de sécurité/à sécurité enfant
JP2013139279A (ja) * 2012-01-04 2013-07-18 C I Kasei Co Ltd 嵌合具及び嵌合具付き袋体
JP2013180825A (ja) * 2012-03-05 2013-09-12 C I Kasei Co Ltd 嵌合具及び嵌合具付き袋体

Also Published As

Publication number Publication date
AU2002221379A1 (en) 2002-06-11
WO2002044044A3 (fr) 2002-10-03

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