WO2018020230A2 - Procédé de création d'une ébauche qui peut être pliée à partir d'une forme plane en un réceptacle tridimensionnel pour l'emballage et une ébauche correspondante - Google Patents

Procédé de création d'une ébauche qui peut être pliée à partir d'une forme plane en un réceptacle tridimensionnel pour l'emballage et une ébauche correspondante Download PDF

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Publication number
WO2018020230A2
WO2018020230A2 PCT/GB2017/052165 GB2017052165W WO2018020230A2 WO 2018020230 A2 WO2018020230 A2 WO 2018020230A2 GB 2017052165 W GB2017052165 W GB 2017052165W WO 2018020230 A2 WO2018020230 A2 WO 2018020230A2
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WO
WIPO (PCT)
Prior art keywords
blank
film
cut
receptacle
web
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/GB2017/052165
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English (en)
Other versions
WO2018020230A3 (fr
Inventor
Quang Phung
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.)
Rapid Action Packaging Ltd
Original Assignee
Rapid Action Packaging Ltd
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 Rapid Action Packaging Ltd filed Critical Rapid Action Packaging Ltd
Publication of WO2018020230A2 publication Critical patent/WO2018020230A2/fr
Publication of WO2018020230A3 publication Critical patent/WO2018020230A3/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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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
    • B65D5/42—Details of containers or of foldable or erectable container blanks
    • B65D5/4279—Joints, seams, leakproof joints or corners, special connections between panels
    • 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
    • B65D5/20—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-up portions connected to a central panel from all sides to form a container body, e.g. of tray-like form
    • B65D5/2014—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-up portions connected to a central panel from all sides to form a container body, e.g. of tray-like form the central panel having a non rectangular shape
    • B65D5/2028—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-up portions connected to a central panel from all sides to form a container body, e.g. of tray-like form the central panel having a non rectangular shape triangular
    • 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
    • B65D5/20—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-up portions connected to a central panel from all sides to form a container body, e.g. of tray-like form
    • B65D5/2038—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-up portions connected to a central panel from all sides to form a container body, e.g. of tray-like form at least two opposed folded-up portions having a non-rectangular shape
    • B65D5/2042—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-up portions connected to a central panel from all sides to form a container body, e.g. of tray-like form at least two opposed folded-up portions having a non-rectangular shape triangular
    • 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
    • B65D5/42—Details of containers or of foldable or erectable container blanks
    • B65D5/56—Linings or internal coatings, e.g. pre-formed trays provided with a blow- or thermoformed layer
    • B65D5/563—Laminated linings; Coatings
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B2105/00—Rigid or semi-rigid containers made by assembling separate sheets, blanks or webs
    • B31B2105/001—Rigid or semi-rigid containers made by assembling separate sheets, blanks or webs made from laminated webs, e.g. including laminating the webs
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B2105/00—Rigid or semi-rigid containers made by assembling separate sheets, blanks or webs
    • B31B2105/002—Making boxes characterised by the shape of the blanks from which they are formed
    • B31B2105/0024—Making boxes having all side walls attached to the bottom
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B2110/00—Shape of rigid or semi-rigid containers
    • B31B2110/30—Shape of rigid or semi-rigid containers having a polygonal cross section
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B2120/00—Construction of rigid or semi-rigid containers
    • B31B2120/40—Construction of rigid or semi-rigid containers lined or internally reinforced
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B50/00—Making rigid or semi-rigid containers, e.g. boxes or cartons
    • B31B50/14—Cutting, e.g. perforating, punching, slitting or trimming
    • B31B50/146—Cutting, e.g. perforating, punching, slitting or trimming using tools mounted on a drum
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B50/00—Making rigid or semi-rigid containers, e.g. boxes or cartons
    • B31B50/14—Cutting, e.g. perforating, punching, slitting or trimming
    • B31B50/16—Cutting webs
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B50/00—Making rigid or semi-rigid containers, e.g. boxes or cartons
    • B31B50/25—Surface scoring
    • B31B50/256—Surface scoring using tools mounted on a drum
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B50/00—Making rigid or semi-rigid containers, e.g. boxes or cartons
    • B31B50/60—Uniting opposed surfaces or edges; Taping
    • B31B50/62—Uniting opposed surfaces or edges; Taping by adhesives
    • B31B50/624—Applying glue on blanks
    • 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
    • B65D5/36—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 specially constructed to allow collapsing and re-erecting without disengagement of side or bottom connections
    • B65D5/3607—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 specially constructed to allow collapsing and re-erecting without disengagement of side or bottom connections formed by folding or erecting a single blank
    • 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
    • B65D5/42—Details of containers or of foldable or erectable container blanks
    • B65D5/4204—Inspection openings or windows
    • 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
    • B65D5/42—Details of containers or of foldable or erectable container blanks
    • B65D5/4266—Folding lines, score lines, crease lines

Definitions

  • the present invention relates to a method of creating a blank that can be folded from a planar form into a three-dimensional receptacle for packing and to a corresponding blank.
  • the method has particular applications to food packaging and the like and has been explicitly designed as a sandwich pack. It will be appreciated, however, that the idea being described is applicable to any form of packaging which is folded from a planar blank and in which there is a need to have a pack which minimises gas passages into the pack, but which is not hermetically sealed.
  • One of these is known as the Freshpack.
  • sandwich packs are produced from blanks and are semi- assembled before being folded in half along a centre line and supplied to food producers as a stack of packs. The packs are then opened up and filled in a die which has a shape corresponding to the shape of the pack. The same die then presses a hinged lid over the top of the pack and attaches it to an out turned flange at the opening to the pack.
  • This pack is similarly formed by being folded from a blank of a laminate of a flexible material such as card and film.
  • a pack is hermetically sealed because there is a continuous layer of the gas barrier film which surrounds the content of the pack. Where there are junctions between sides of the pack, the film is fused in these regions to preserve the hermetic seal.
  • our modified atmosphere pack is provided with bridging film for example between adjacent flanges. Such film is stretched across a gap between adjacent flanges and is fused to the lid thereby eliminating any pin holes and preserving the continuous layer of the gas barrier film.
  • the two types of pack have very different customer bases in that a retailer such as a supermarket with a high turnover of sandwiches who makes their sandwiches in a central depot will require the first product while a retailer such as a petrol station with a lower turnover of sandwiches supplied from a central depot will want the much longer life.
  • the present invention is aimed at providing an improvement to the non-hermetically sealed packs which will extend their shelf life without adding to the cost and which can be filled and closed by a user using simple equipment and, ideally, on existing equipment.
  • the present invention takes the approach of improving on the existing non-hermetically sealed design by attempting to make existing gas paths through the pack as small as possible.
  • the present invention recognises that, in any three-dimensional receptacle which is formed from a folded blank, there is inevitably at least one region in which a number of free edges must come together in one corner. This creates a pin hole which is a significant gas path into the container in our Freshpack container. Rather than trying to create a hermetic seal in this region using face to face film contact of two laminated portions to replicate our modified atmosphere pack, we have, instead, created a web of unsupported film in the vicinity of this corner. This web is designed to be crumpled when the receptacle is formed and attaches to at least one of the faces from the other part of the blank which is at this corner.
  • the pin hole which is otherwise present at this corner is at least covered by a film.
  • the crumpled film in the immediate vicinity of this corner which is attached to the fourth and/or fifth face provides, at worst, a tortuous path around the film in this region.
  • a receptacle formed from a planar blank according to claim 1 .
  • a method of forming the receptacle comprising forming a receptacle according to claim 1 and folding it to create the receptacle.
  • the present invention also extends to the method according to claim 4.
  • Such an approach is similar to the approach adopted in WO 2008/025982 in which a first series of cuts are formed prior to lamination and then a second cut is formed to sever the blank and to form unsupported web portions in corners which are between adjacent out- turned flanges on the face which receives the lid.
  • WO 2008/025982 all areas of film, without board, have the board cut and fully removed during the first cutting process, to make "windows".
  • the outline cut is also made through the film first, and into the flexible material. But in this case the flexible material has not been removed from the web regions in the through cut.
  • the cutter uses a shallower blade in this area, so that the film is cut but the blade, at most, only enters into the surface of the flexible material below, leaving the flexible material within the web region still attached to the flexible material in the waste area around the blank. This flexible material will therefore form part of the waste matrix such that it pulls away with the waste matrix, to leave a clean window on the edge of the pack.
  • a further aspect of the invention is defined in claim 5.
  • the Freshpack container there is no U-shaped cut-out between adjacent flange portions. Instead, there is simply a straight cut between the flange portions. These simply separate when the flanges are out-turned creating a pin hole between the lid and the flanges at the interface.
  • Our modified atmosphere pack does have a similar U-shaped cut-out, but this extends for less than half the depth of the flange portions. The cut line is therefore significantly longer as a consequence of which, when the flanges are out-turned, the film has to stretch far more than it does in the present invention in which the cut line is much shorter.
  • This longer cut line is essential in the modified atmosphere pack as there must be enough depth of film in this region to form a hermetic seal with the lid.
  • this configuration cannot be adopted with our Freshpack design which uses a film which could not be stretched to the required degree.
  • the shorter cut line requires the film to stretch to a much smaller extent than in the modified atmosphere design, this is able to provide a small amount of film which will cover the pin hole which would otherwise be present but does not require a stretchier film.
  • the aim of the invention is to cover the pin hole rather than provide a hermetic seal such that the smaller depth of film which is stretched between the flanges in this corner is adequate for the purpose.
  • the length of the cut out is less than 5mm and more preferably less than 4mm.
  • Fig. 1 is a plan view of a blank from which the pack is formed
  • Fig. 2 is a plan view of the pack in a "fold flat" configuration
  • Fig. 3 is a side view of the pack in its erected configuration with the lid open;
  • Fig. 4a is a schematic diagram showing the various stages in the method of production of the blank
  • Fig. 4b is a schematic diagram showing the various stages in the method of converting the blank to flat packs
  • Fig. 5 is a diagram showing the first set of cuts
  • Fig. 6 is a similar diagram showing a second set of cuts
  • Fig. 7 is a similar diagram showing the combined set of cuts
  • Fig. 8 shows a detailed portion of a web region
  • Figs. 9A-9D show cross-sections through line IX-IX in Fig. 8 in various stages of the manufacturing process.
  • the pack comprises a first face 1 which is in the shape of a right angled isosceles triangle with two shorter edges 3, 4 which are formed with score lines and a long edge 5 formed with a score line.
  • the first face 1 also has a fold-flat score line bisecting the triangular face.
  • a lid 8 is formed on the opposite side of the longer edge 5.
  • the lid 8 has a window 9 which is optional and can be of any shape.
  • the window 9 is formed by a film which is laminated onto the card. As shown in Fig. 1 , the card is the uppermost layer and the film is laminated to the side of the card facing away from the plane of the paper.
  • the outer peripheral region 10 of the lid 8 will connect the flanges to close the pack as described below.
  • the fold flat line 6 extends across the centre of the lid 8 as shown in Fig. 1 .
  • a second face 12 which is generally rectangular is provided on the opposite side of the short edge 3 and has a flange 13 separated from the edge 14 of the face 12 closest to the lid 8 by a score line.
  • This structure is replicated with a third face 16 extending from the second short edge 4 and having flange 17.
  • a tab 18 which folds onto the second face 12 to close the bottom corner of the pack. This is assisted by a web 19 of film which projects beyond the card as described in greater detail below.
  • the pack has a fourth face 20 as shown in Fig. 3. This is formed of two parts, namely a first panel 21 extending from the second face 12 and a second panel 22 extending from the third panel 16. As can be seen in Fig. 3, there is a fold flat line 23 extending across the second panel 22 such that, in the finished pack, it is in alignment with the fold flat line 6 through the first face 1 and lid 8.
  • the second panel 22 extends beyond the fold flat line 23.
  • the first panel 21 stops short of the fold flat line 23 as can be seen in Fig. 3 where its outer edge 24 is short of the fold flat line 23.
  • the tab 18 is folded up and the second and third faces 12, 16 are brought together at the apex 30. Adhesive is applied to the tab 18 to adhere it to the film on the first face 12.
  • the fourth face is formed by a similar bonding process in which an overlapping portion 31 of the second panel 22 is adhered to the first panel 21 .
  • the partially assembled pack is then folded flat along fold flat lines 6 and 23 into the configuration shown in Fig. 2.
  • a stack of containers in this configuration take up very little space, and can be packed into suitable outers for supply to an end user.
  • An end user will then either transfer stacks of packs into an automated denester to open and load the packs into the sealing machine or unfold a pack, and place it by hand into the feed conveyor for a sealing machine, which has suitably shaped hoppers that match the dimensions of the open top of the pack and provide support for the prismatic shape of the pack body.
  • the pack is then filled with a sandwich before the lid is folded over and sealed either by hand or by use of automated equipment.
  • a sealing flange made of a short flange portion 40 which extends across a top edge 42 of the first panel 21 and a long flange portion 42 which extends across the top edge 43 of the second panel 22 beyond the fold flat line 23.
  • a web 44 of film is retained in a corner of the blank between the overlapping region 31 and the long flange portion 41 . This web 44 forms a seal between the flange portions 40, 41 and the lid 10 in the finished container. As can be seen in Fig. 3, there is a gap 45 between the flange portion 40, 41 in which part of the web 44 is visible.
  • a reel of a web of material from which the packs are to be formed is indicated at 130.
  • the material may be a relatively heavy grade paper or a soft card.
  • a paper weight in the range 20 to 25 gsm may be used although 80 to 200 gsm is preferred.
  • Food grade papers can be used including both coated (single or double-sided), uncoated papers and natural papers are suitable as are recycled papers.
  • the reel is mounted on a roller 131 to enable the web to be unrolled and fed to a plurality of stations where different treatments are carried out on the web. In the first operation the web 132 passes between several (e.g.
  • upper and lower rollers 133 which apply print colours and varnishes.
  • the upper rollers are print or varnish applying rollers and the lower rollers support the web from below in the region where it is engaged by the upper rollers.
  • Initial upper rollers print text and graphical information on the upper surface of the web and subsequent rollers apply a coating or coatings of varnish to protect the print.
  • the web then passes between upper and lower cutter rollers 134, 135 on which there are cutting blades designed to form continuous lines of cut, intermittent lines of cut (perforation lines) or lines of partial cut (cutting only part way through the substrate). Partial cuts or perforation cut lines are made through the web where the subsequent blank is to be folded between adjacent walls of the blank or between adjacent tabs and walls of the blank.
  • the cutters on the roller 135 also form the window 9 in the lid 8 by forming a continuous cut in the required window shape and then removing the cut out portion of web to form a window.
  • the window cut out portions are usually relatively large, by design, as they are easy to handle as they are removed.
  • a web of thin plastics transparent film 136 is fed from a roll 137.
  • Adhesive is applied to either the back of the web 132 or the face of the film 136 and film brought into contact with the reverse surface of the web 132 to overlie the web.
  • the film is pressed against the web between upper and lower rolls 138 and 139 to laminate the film to the paper web.
  • the rolls are followed by a dryer 140.
  • the transparent film may be any clear film or multi-film laminate, such as, but not exclusive to, polylactic acid (cellulose), PP (polypropylene - BOPP), PET (Polyethyleneterephthalate - Polyester), or PE (polyethylene - OPP).
  • the web can be passed to the end of the machine and rewound to produce a reel.
  • a reel of the thus formed laminated web can be transported to a further apparatus for completing the blanks.
  • the web 132 then passes to a further pair of cutter rollers 141 , 142 having shaped cutters to cut a folded blank 143 (as discussed below with reference to Fig. 6) from the web to separate the blank which can be erected into a pack form as shown in Figures 1 to 3.
  • the carton blanks are collated at the end of the machine 145 ready for stacking and transferring to the next process.
  • Fig. 5 The first cut performed by the rollers 134, 135 is shown in Fig. 5.
  • the reference numerals of Fig. 1 have been introduced at the appropriate place in Fig. 5 to designate the various faces of the blank even though these are not yet fully formed in this Figure. These simply represent the regions of the blank where the various features will be formed following the final cut described below.
  • a number of fold lines are formed by partially cutting the web. These include the fold flat line 6, the score lines at the shorter edges 3, 4, the score lines on the opposite side of the second 12 and third 16 faces, the score line along the edge 5 between the first face 1 and the lid 8, score line 50 to form a fold line at the bottom edge of the third face 16, and a score line to form the fold flat line 23 on the second panel 22.
  • the cuts may be partially through the web and/or may be discontinuous to form a line of weakness to create a fold. They do not fully cut all of the material in any of these lines.
  • a number of full cuts are made, namely cuts which are not intermediate and extend through the full depth of the web. These are a cut 51 to form the window 9, a cut 52 as the first cut in a web portion 53 in the vicinity of the web 19 as described in greater detail below and a cut 54 to form a web portion 55 in the vicinity of the web 44 as described below.
  • a number of additional through cuts 58 are also made at this stage. These are short cuts which penetrate fully through the web. In the finished blank, these ensure that the web material of adjacent flanges can easily be separated when the flanges are folded out. This is described in greater detail below.
  • the final cut performed by the cutting rollers 141 , 142 is shown in Fig. 6. This is the cut which releases the blank from the web and therefore extends fully around the perimeter of the blank and all the way through the web of flexible material and the film except in the regions of the web portions 53 and 55 as described below. Additional cuts are made at this stage including a cut 62 to form a tab 18. Two U-shaped cuts 63 are made at junctions between adjacent flanges as described below.
  • the cutting process in the first web portion 53 will now be described with reference to Figs. 8 and 9.
  • the process is the same for the second web portion 55, albeit with a different shape and this will not be described separately.
  • the first cut 52, 53 is made through the web 132. This cut forms the edge of the web in a corner of the finished blank.
  • This process is shown in Fig. 9A.
  • Fig. 9B the laminate has been formed by the addition of the film 136. This has been printed with adhesive as described above in every region except for region 70 which is devoid of adhesive.
  • This non-adhesive region 70 corresponds to the footprint of the web portion outlined by 52, 53 and 64, and is shown shaded in Fig. 8.
  • Blanks 145 are taken from the stack and passed through a succession of stations including a folding station 150 in which the tab 18 is folded inwardly and the overlapping portion 31 is folded inwardly along the fold flat line 23.
  • the blank then moves to a gluing station 151 where glue guns apply adhesive to the tab 18 and the overlapping region 31 .
  • the blank then moves to a folding station 152 where the blank is folded in half such that the second face 12 adheres to the tab 18 and the first panel 21 is adhered to the overlapping portion 31 to form the finished blank as described with reference to Fig. 2.
  • the tab 18 is then adhered to the second face 12 as this is folded in and a second corner 147 between the second face 12 and first panel 21 and folded into a position such that it coincides with the first corner 146. In this position, the overlapping portion 31 is adhered to the first panel 21 .
  • This is not sufficient to guarantee a hermetic seal in the coinciding first and second corners 146 and 147 but it does at least serve to create a tortuous passageway around the web 19 which is far more effective at reducing the gas flow into the pack than the previous pin hole.
  • the film web 44 adjacent to the flange portion is formed in the same manner as described above. This is able to seal the gap 45 between the flange portions 40, 41 when the lid is closed. Since this flap of film runs along the heat seal area of the flange, it is sealed, along with the lid, and forms a near hermetic seal at this point in the pack, where there would normally be a small hole in packs without this flap of film.
  • the U-shaped cuts 63 between the flanges 13, 14 and 17, 41 together with the through cuts 58 form a region in the blank where, in the vicinity of the junction between adjacent flanges, there is a short through cut 58 which remains covered with the film as this cut was part of the first cut formed before lamination.
  • this film is stretched, but only to a small degree as the length of the cut 58 and the finished blank is very short. This ensures a small stretched piece of film in the vicinity of the corner which will cover a pin hole which is otherwise formed in this location where the lid is attached to the flanges.
  • the cuts 58 can be on the final cutter rather than the first cutter. This does not close the corner as effectively as when the cuts are on the first cutter, but the hole at this point will be small.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Making Paper Articles (AREA)

Abstract

L'invention concerne une ébauche plane qui peut être pliée en un réceptacle tridimensionnel pour l'emballage. L'ébauche est formée d'un stratifié d'une feuille de matériau flexible collée à une feuille de film. Plusieurs faces (16, 18, 22, 31) se rejoignent au niveau d'un premier coin (146). D'autres faces (12, 21) se rejoignent au niveau d'un second coin (147) qui est séparé du premier coin (146) dans l'ébauche, mais qui coïncide avec le premier coin dans le réceptacle. Une bande de film non supporté (19) est disposée au niveau du premier coin qui est froissé lorsque les coins (146, 147) sont amenés l'un en direction de l'autre pour former le réceptacle afin de former une barrière aux gaz non scellée hermétiquement dans les coins coïncidents. L'invention concerne un procédé de séparation de l'ébauche qui ne laisse pas de quelconque matériau ou film flexible non raccordé et qui laisse un matériau de film non supporté dans les régions de bande. Entre des parties de bord adjacentes, une découpe en forme de U (63) est formée. Une ligne de coupe (58) est formée dans le matériau flexible, mais pas le film s'étendant de la base de la découpe jusqu'au coin. Le film qui recouvre la ligne de coupe est configuré pour s'étirer lorsque les bords sont retournés.
PCT/GB2017/052165 2016-07-25 2017-07-25 Procédé de création d'une ébauche qui peut être pliée à partir d'une forme plane en un réceptacle tridimensionnel pour l'emballage et une ébauche correspondante Ceased WO2018020230A2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB1612850.6 2016-07-25
GB1612850.6A GB2552776A (en) 2016-07-25 2016-07-25 A method of creating a blank that can be folded from a planar form into a three-dimensional receptacle for packaging and a corresponding blank

Publications (2)

Publication Number Publication Date
WO2018020230A2 true WO2018020230A2 (fr) 2018-02-01
WO2018020230A3 WO2018020230A3 (fr) 2018-03-22

Family

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PCT/GB2017/052165 Ceased WO2018020230A2 (fr) 2016-07-25 2017-07-25 Procédé de création d'une ébauche qui peut être pliée à partir d'une forme plane en un réceptacle tridimensionnel pour l'emballage et une ébauche correspondante

Country Status (2)

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GB (1) GB2552776A (fr)
WO (1) WO2018020230A2 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108656625A (zh) * 2018-05-11 2018-10-16 武汉工程大学 一种纸盒折叠系统

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Publication number Priority date Publication date Assignee Title
GB943786A (en) * 1960-10-25 1963-12-04 Rausing Anders Ruben Improvements in and relating to foldable cartons and blanks therefor
US5253801A (en) * 1992-12-22 1993-10-19 International Paper Company Multi sided food tray
AU2003292409B2 (en) * 2002-12-10 2009-10-29 Rapid Action Packaging Limited Carton for diagonally cut sandwiches
GB2441314A (en) * 2006-08-29 2008-03-05 Rapid Action Packaging Ltd Blank preparation, plastic sheet laminated to card
GB0903255D0 (en) * 2009-02-26 2009-04-08 St Neots Packaging Ltd Article for packaging foodstuffs and method of making same
GB201010789D0 (en) * 2010-06-28 2010-08-11 St Neots Packaging Ltd Method & apparatus for making food carton
RU2583911C2 (ru) * 2010-12-17 2016-05-10 Колпэк Лимитед Контейнер и заготовка
GB201101748D0 (en) * 2011-02-01 2011-03-16 Colpac Ltd A container and blank
GB201206258D0 (en) * 2012-04-05 2012-05-23 Warne & Co Ltd A Process
GB2517981A (en) * 2013-09-06 2015-03-11 Colpac Ltd A container flange
GB2518231A (en) * 2013-09-16 2015-03-18 Coveris Flexibles Uk Ltd A blank for forming a carton
GB201405013D0 (en) * 2014-03-20 2014-05-07 St Neots Holdings Ltd Improvements in or relating to manufacture of packaging

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108656625A (zh) * 2018-05-11 2018-10-16 武汉工程大学 一种纸盒折叠系统
CN108656625B (zh) * 2018-05-11 2019-12-06 武汉工程大学 一种纸盒折叠系统

Also Published As

Publication number Publication date
WO2018020230A3 (fr) 2018-03-22
GB2552776A (en) 2018-02-14
GB201612850D0 (en) 2016-09-07

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