EP0796799A1 - Kaschierter Gegenstand mit abgedichteten Ecken und Zuschnitt zur Herstellung desselben - Google Patents

Kaschierter Gegenstand mit abgedichteten Ecken und Zuschnitt zur Herstellung desselben Download PDF

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Publication number
EP0796799A1
EP0796799A1 EP97301795A EP97301795A EP0796799A1 EP 0796799 A1 EP0796799 A1 EP 0796799A1 EP 97301795 A EP97301795 A EP 97301795A EP 97301795 A EP97301795 A EP 97301795A EP 0796799 A1 EP0796799 A1 EP 0796799A1
Authority
EP
European Patent Office
Prior art keywords
blank
liner
layer
panels
liner layer
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.)
Withdrawn
Application number
EP97301795A
Other languages
English (en)
French (fr)
Inventor
John Shilcock
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.)
Field Group PLC
Original Assignee
Field Group PLC
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 Field Group PLC filed Critical Field Group PLC
Publication of EP0796799A1 publication Critical patent/EP0796799A1/de
Withdrawn legal-status Critical Current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
    • B65D5/56—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
    • 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

Definitions

  • This invention relates to articles, such as cartons, made of cardboard, paperboard or similar lightweight foldable sheet material and provided with a liner to seal at least some of the corners of the article.
  • the present invention is based on the recognition that a simple and economical form of lined carton can be provided by using a plural layer material, at least one of whose layers can function as a liner.
  • the present invention provides a blank made from a plural layer sheet material, one of whose layers can function as a liner, for making an internally lined article having a corner defined at the junction of at least three hinge lines between panels of the blank, the liner layer being intact all around the said junction, so as to seal the said corner, but arranged to delaminate sufficiently from the remainder of the material, during erection of the blank, to enable the said corner to be formed, the liner layer being formed with a linear cut arranged to assist it to delaminate as aforesaid.
  • the linear cut preferably extends at a substantially constant distance from the said junction.
  • the said panels of the blank are two hingedly interconnected wall panels and two closure flaps hingedly connected one to each said wall panel and to each other by way of said liner layer, the said cut being formed in the liner layer of one of said closure flaps so as to assist the liner layer to delaminate from said one closure flap when the other closure flap is folded in.
  • the said cut is aligned as a continuation of the distal edge of the said other closure flap.
  • the said closure flaps are separated from each other by a cut which is slightly laterally offset from the hinge line between the said wall panels, in the direction of the said other closure flap.
  • the invention provides a blank made from a plural layer sheet material, one of whose layers can function as a liner, for making an internally lined article having a corner defined at the junction of at least three hinge lines between panels of the blank, wherein the liner layer is intact all around the said junction, so as to seal the said corner, but is arranged to delaminate sufficiently, during erection of the blank, to enable the said corner to be formed, the said liner layer extending across a dividing line between the edges of two of said panels which is substantially continuous with one of said hinge lines, but said dividing line being slightly offset from said continuity so as to cause the liner layer to delaminate from the edge region of one of said two panels when the blank is folded about said hinge line.
  • the blank may be for forming a rectangular carton with eight of said corners.
  • the said sheet material may be a laminate of cardboard, paperboard or the like and a layer of liner material.
  • the liner layer may then be formed from a plastics film, more preferably a polyethylene film.
  • the sheet material could be formed wholly of cardboard, paperboard or the like, incorporating a delaminatable layer.
  • a blank for making a carton is shown.
  • the carton is intended to have sealed corners in order for it to be sift-resistant, so that it can contain relatively coarse-grained material such as rice grains and the like.
  • the blank is formed from a laminated sheet material comprising a layer of cardboard and a liner layer of polyethylene, with the liner on the side which forms the inside of the erected carton.
  • a multilayer material for example multi-ply board, may be used, as long as it comprises a layer which can serve as a liner and can delaminate from the remainder of the board.
  • This layer can, for example, be formed from a layer of strong material which is weakly attached to the remainder of the board.
  • references to the liner layer and the layer of cardboard should be construed as also meaning the layer of a multi-ply material functioning as a liner and the remainder of the multi-ply material, respectively.
  • the blank comprises a row of four body panels 1 to 4 with a gluing flap 5 at one end of the row, separated by hinge lines 40 to 43.
  • a front closure flap 7, a rear closure flap 9 and side closure flaps 6 and 8 are provided hingedly connected to the respective body panels.
  • the front and rear closure flaps 7 and 9 are slightly longer than the side closure flaps 6 and 8, to facilitate machine erection. However, this is not necessary, and the invention can equally well be applied to a blank having all of the closure flaps the same length.
  • Analogous closure flaps 10 to 13 are provided at the other end of the blank.
  • closure flaps 6 and 7 are separated from one another by a cut 14 which extends through the layer of cardboard but not through the liner layer. Similar cuts 15 to 17 separate the closure flaps 7 to 9 and the gluing flap 5 from one another. These cuts are shown in the Figure by short-dashed lines.
  • Figure 2 shows an area of the blank in the region where the panels 1, 2, 6 and 7 meet, in greater detail.
  • the hinge line 40 between the panels 1 and 2 ends, as does the cut 14 separating the layers of cardboard in closure flaps 6 and 7.
  • the hinge line 40 is slightly offset from the cut 14, so that they are parallel but not co-linear.
  • the distance of the offset is around 0.5mm, although this can be varied according to requirements. It will also be seen that the end of the hinge line 40 and the end of the cut 14 are not coincident.
  • the blank is first folded to form a tube, and the flap 5 is glued to the panel 1 to secure the blank in the form of a tubular body.
  • the body panels fold around the hinge lines 40 to 43.
  • the end closure flaps are connected to the body panels, the end closure flaps also fold around imaginary extensions of the same lines, and since the liner layer is continuous in those regions, it also folds around the same imaginary lines.
  • tubular body effectively comprises three separate tubes, a central one formed from body panels 1 to 4, and two end ones formed from the closure flaps 6 to 9 and 10 to 13.
  • the body is sealingly contiguous, whereby leakage of a product stored within the carton can only occur at its ends.
  • closure flaps 6 to 9 The steps required to close one end of the body will now be described, with reference to closure flaps 6 to 9. Firstly, front closure flap 7 and rear closure flap 9 are folded outwardly away from each other along the hinge lines connecting them to body panels 2 and 4 respectively. As the front and rear closure flaps 7 and 9 are thus drawn away from the side closure flaps 6 and 8, the liner layer delaminates from the cardboard layer in regions 26 to 29 of flaps 7 and 9. These regions in which delamination takes place are triangular, and are eventually bounded by the side edges of the flaps 7 and 9, the cuts 18 to 21, and folds 22 to 25 which come about in the liner layer, shown in Figure 1 as thin solid lines.
  • the liner layer pulls the side closure flaps inwards, until the carton reaches the configuration shown in Figure 3, in which the front and rear closure flaps 7 and 9 extend outwardly perpendicular to the body panels 2 and 4, and the side closure flaps 6 and 8 extend inwardly perpendicular to the body panels 1 and 3.
  • the liner layer has delaminated from the cardboard, and these regions now consist of a layer of cardboard only.
  • the liner layer 30 to 33 which was originally present in these regions has been folded through 180° about lines 22 to 25 respectively, and now overlies part of the liner layer on front and rear closure flaps 7 and 9.
  • the front closure flap 7 is then folded inwardly along the hinge connecting it to body panel 2, so as to overlie side closure flaps 6 and 8. As the front closure flap 7 is folded inwardly, the liner layers 32 and 33 are trapped between it and the side closure flaps 6 and 8 in such a way that the liner layers are sealingly incorporated in each corner.
  • the result of this folding step is shown in Figure 4.
  • the rear closure flap 9 is then folded to overlie front closure flap 7, trapping the liner layers 30 and 31 therebetween and sealingly incorporating them in the corners of the carton.
  • the rear closure flap 9 is glued down to complete the closure of the end of the carton, as shown in Figure 5.
  • An analogous folding method is used on flaps 10 to 13 to close the other end of the carton.
  • the resulting carton has a layer of liner sealingly incorporated at each of its corners, and thus has improved sift-resistant qualities.
  • the length of the path which a particle must follow to escape from the package is substantially increased.
  • the use of a laminated material removes the need to affix a separate liner sheet to the blank, and thus reduces the number of steps involved in the manufacture of the carton.
  • the material forming the liner layer can be chosen to have properties appropriate to the contents of the carton. For example, in certain applications, it will be desirable for the liner to exhibit waterproof properties. Further, as discussed above, a multi-ply material may be used, with one layer acting as a liner, and the remainder of the material forming the body of the carton. The layers of the multi-ply material may be chosen to perform different functions as necessary.
  • the invention has been described in the context of a blank for forming a rectangular carton, it can equally be applied to blanks for forming other forms of cartons (for example with a hexagonal or octagonal cross-section), trays and the like. In particular, it can be used on blanks used for forming articles having non-cubical corners, for example dished trays. In this case, if the feature of offsetting the cut and the fold line is to be used, then the cut separating the end flaps, corresponding to cut 14 in the blank of Figures 1 to 5, would be offset from the natural fold line between the end flaps.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Cartons (AREA)
EP97301795A 1996-03-18 1997-03-18 Kaschierter Gegenstand mit abgedichteten Ecken und Zuschnitt zur Herstellung desselben Withdrawn EP0796799A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB9605631 1996-03-18
GBGB9605631.2A GB9605631D0 (en) 1996-03-18 1996-03-18 Lined articles having sealed corners

Publications (1)

Publication Number Publication Date
EP0796799A1 true EP0796799A1 (de) 1997-09-24

Family

ID=10790566

Family Applications (1)

Application Number Title Priority Date Filing Date
EP97301795A Withdrawn EP0796799A1 (de) 1996-03-18 1997-03-18 Kaschierter Gegenstand mit abgedichteten Ecken und Zuschnitt zur Herstellung desselben

Country Status (2)

Country Link
EP (1) EP0796799A1 (de)
GB (1) GB9605631D0 (de)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3261536A (en) * 1964-11-09 1966-07-19 Diamond Int Corp Cover sealed leakproof carton
GB1378742A (en) * 1970-10-08 1974-12-27 Boxfoldia Ltd Manufacture of cartons
US3877630A (en) * 1972-01-19 1975-04-15 Paxall Inc Method and blank for forming a package within a wrapping

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3261536A (en) * 1964-11-09 1966-07-19 Diamond Int Corp Cover sealed leakproof carton
GB1378742A (en) * 1970-10-08 1974-12-27 Boxfoldia Ltd Manufacture of cartons
US3877630A (en) * 1972-01-19 1975-04-15 Paxall Inc Method and blank for forming a package within a wrapping

Also Published As

Publication number Publication date
GB9605631D0 (en) 1996-05-22

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