GB2442327A - Food container - Google Patents
Food container Download PDFInfo
- Publication number
- GB2442327A GB2442327A GB0718702A GB0718702A GB2442327A GB 2442327 A GB2442327 A GB 2442327A GB 0718702 A GB0718702 A GB 0718702A GB 0718702 A GB0718702 A GB 0718702A GB 2442327 A GB2442327 A GB 2442327A
- Authority
- GB
- United Kingdom
- Prior art keywords
- blank
- container
- webbing
- blank according
- forming
- 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- Withdrawn
Links
- 235000013305 food Nutrition 0.000 title claims abstract description 29
- 239000000758 substrate Substances 0.000 claims abstract description 25
- 239000011087 paperboard Substances 0.000 claims abstract description 16
- 238000007789 sealing Methods 0.000 claims abstract description 16
- 238000000034 method Methods 0.000 claims description 33
- 239000011248 coating agent Substances 0.000 claims description 23
- 238000000576 coating method Methods 0.000 claims description 23
- 239000007788 liquid Substances 0.000 claims description 22
- 239000000853 adhesive Substances 0.000 claims description 17
- 230000001070 adhesive effect Effects 0.000 claims description 17
- 230000004888 barrier function Effects 0.000 claims description 12
- 229920003023 plastic Polymers 0.000 claims description 11
- 239000000463 material Substances 0.000 claims description 10
- 239000004033 plastic Substances 0.000 claims description 9
- 238000003466 welding Methods 0.000 claims description 7
- 239000004698 Polyethylene Substances 0.000 claims description 6
- 238000005520 cutting process Methods 0.000 claims description 6
- -1 polyethylene Polymers 0.000 claims description 6
- 229920000573 polyethylene Polymers 0.000 claims description 6
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 claims description 5
- 235000012149 noodles Nutrition 0.000 claims description 4
- 238000003475 lamination Methods 0.000 claims 1
- 239000011111 cardboard Substances 0.000 abstract description 2
- 239000002985 plastic film Substances 0.000 abstract 2
- 238000010276 construction Methods 0.000 abstract 1
- 239000010410 layer Substances 0.000 description 11
- 239000003925 fat Substances 0.000 description 7
- 239000004519 grease Substances 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 3
- 230000001010 compromised effect Effects 0.000 description 3
- 239000003921 oil Substances 0.000 description 3
- 238000004806 packaging method and process Methods 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 2
- 241000826860 Trapezium Species 0.000 description 1
- 238000004026 adhesive bonding Methods 0.000 description 1
- 239000011247 coating layer Substances 0.000 description 1
- 230000001627 detrimental effect Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 235000013410 fast food Nutrition 0.000 description 1
- 239000002648 laminated material Substances 0.000 description 1
- 239000000123 paper Substances 0.000 description 1
- 239000002356 single layer Substances 0.000 description 1
- 238000002791 soaking Methods 0.000 description 1
Classifications
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- 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
- B65D5/2047—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 trapezoidal, e.g. to form a body with diverging side walls
-
- 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
- B65D5/20—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
- B65D5/24—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 with adjacent sides interconnected by gusset folds
- B65D5/241—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 with adjacent sides interconnected by gusset folds and the gussets folds connected to the inside of the container body
-
- 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
- B65D5/24—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 with adjacent sides interconnected by gusset folds
- B65D5/241—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 with adjacent sides interconnected by gusset folds and the gussets folds connected to the inside of the container body
- B65D5/243—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 with adjacent sides interconnected by gusset folds and the gussets folds connected to the inside of the container body the container body comprising a continuous rim or flange
-
- 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
- B65D5/28—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 with extensions of sides permanently secured to adjacent sides, with sides permanently secured together by adhesive strips, or with sides held in place solely by rigidity of material
-
- 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
- B65D5/4279—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
- B65D5/42—Details of containers or of foldable or erectable container blanks
- B65D5/64—Lids
- B65D5/66—Hinged lids
- B65D5/6626—Hinged lids formed by folding extensions of a side panel of a container body formed by erecting a "cross-like" blank
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- 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
- B65D85/00—Containers, packaging elements or packages, specially adapted for particular articles or materials
- B65D85/30—Containers, packaging elements or packages, specially adapted for particular articles or materials for articles particularly sensitive to damage by shock or pressure
- B65D85/36—Containers, packaging elements or packages, specially adapted for particular articles or materials for articles particularly sensitive to damage by shock or pressure for bakery products, e.g. biscuits
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Cartons (AREA)
- Catching Or Destruction (AREA)
- Glass Compositions (AREA)
Abstract
A blank for forming a food product container has a laminate construction comprising a paper or cardboard substrate having an aperture and an impermeable plastic sheet laid on the entire substrate and defining a window over the aperture. The blank further has webbing sections 20 provided between two panels 4, 5 to enable the sealing container to be more easily formed. The webbing sections 20 comprise at least two portions 20a, 20b and a fold line 21. The fold line 21 extends to the opening of the container when formed, so that the edges don't interfere inside the container. A hole 8 is provided in one webbing portion 20b spaced from the fold line 21, so that the plastic sheet portion of the webbing can be heat sealed against an adjacent wall.
Description
A CONTAINER
The invention relates to a container and a blank for a container, and more specifically but not exclusively, to a sandwich container and a blank for a sandwich container.
Sandwiches and other Convenience foods are often pre-prepared and presented in packaging ready for purchase. The packaging used is usually manufactured from either a plastics material or from paperboard. For the purposes of this specification paperboard' is considered to encompass paper, cardboard and similar materials.
Given that this packaging has to be disposed of, paperboard containers are preferable from an environmental standpoint. Company specific graphics, logos and trademarks can also be applied during the manufacturing process far more easily than for plastic containers. Nonetheless, plastic containers remain popular because they are generally capable of forming a better seal and thereby prolonging the shelf life of the product contained therein. Typically, paperboard containers folded from blanks struggle to achieve a good airtight seal. The paperboard is also susceptible to damage from grease, fat or other liquids in the food products. If grease is allowed to soak into the paperboard, then both the outward appearance and the structural integrity of the container is compromised. Even with the inclusion of a barrier coating, the shelf life of products in such containers is limited to around forty eight hours. This is because cut edges (i.e. where the blank was cut from a larger piece of treated paperboard) are generally exposed on the inside of the container. These cut edges are not protected by any provided barrier coating, and fat and grease may be readily absorbed at these points. Since these cut edges are usually to be found where the blank is bonded together, any damage caused can have a detrimental affect on the integrity of the seal provided. The integrity of the seal can also be compromised if a window, commonly a sheet of transparent plastics material bonded over an aperture in the paperboard, is provided.
The provision of webbing sections as opposed to tabs to form the join between abutting walls of the blank have been beneficial in creating a more effective seal. As shown in WO 03/018410, these webbing sections generally comprise two areas of paperboard with a fold line in between, each connected by a further fold line to one of two abutting walls. When the blank is folded the webbing sections fold like a concertina to lie flat against one of the walls. In order to successfully bond this more complex closure, it has been necessary to use complex techniques such as heat sealing or RF welding, and/or to cut away one webbing area so that it does not extend to the full height of the other. The requirement for heat sealing or RF welding means that containers often have to be pre-formed from the blanks prior to shipping to customers. Any exposed cut edges lead to reduced integrity of the finished container, and further problems as discussed above.
Accordingly, it is an object of the present invention to provide a container, or a blank for a container which overcomes the above problems such that a food product container with an improved seal can be provided.
According to a first aspect of the present invention there is provided a blank for assembly into a food product container having a webbing section between two panels which, when the blank is assembled, form two abutting walls of the container, the webbing section comprising two webbing portions with a fold line therebetween, one of said webbing portions comprising a discontinuity spaced from the fold line so as to allow bonding means to bond one of the abutting walls to the other one of said webbing portions when the blank is assembled.
The provision of a discontinuity spaced from the webbing fold line allows the blank to be formed into a container and easily bonded together without the integrity of the seal being compromised. The best seal is possible when the discontinuity takes the form of an aperture formed in at least one of the webbing areas.
With the discontinuity as described, it is possible to bond the container together using a standard adhesive. This is beneficial if the blanks are to be shipped to customers in an unassembled state, since they can be glued by customers using existing machinery. The blank may also be bonded, before or after shipping, by other means.
It is preferable that the fold lines which exist between panels of the blank are defined by creases rather than by scoring. A better seal can be achieved by the assembled container if this approach is taken.
A better sealing container is also achievable through the provision of a barrier coating on the blank. This coating is preferably also susceptible to heat sealing and/or RF welding to enable the container to be formed by more than one method. Suitable materials for the coating include but are not limited to plastics, for example polyethylene or acrylic.
The blank preferably folds into a substantially triangular prism with one open side, in particular into a container suitable for sandwiches. Alternatively, the blank may fold into a substantially square tub shape, for containing noodles or similar. The folded container may also comprise a flange portion around the opening and/or a folding lid which are formed as further panels of the blank.
According to a related aspect of the present invention there is provided a blank for assembly into a food product container having a webbing section between two panels which, when the blank is assembled, form two abutting walls of the container, the webbing section comprising two webbing portions with a fold line therebetween, the fold line being of such a length that, when the blank is assembled into a container, the end of the fold line is adjacent an opening of the container provided to receive food product.
The extension of the fold line to the opening of the assembled container eliminates cut edges from the inside of the container, thereby providing greater integrity. The blank thus described may also benefit from any of the previously mentioned features.
According to a third aspect of the present invention there is provided a method of forming a container from a blank as described above by applying adhesive to bond the panels and webbing portions.
A further aspect of the present invention provides a blank for assembly into a food product container comprising a substrate layer and a liquid impermeable layer, the liquid impermeable layer being applied over the entire substrate layer and forming a window over an aperture provided in the substrate layer.
Previously, it has been commonplace to cut a blank to shape, apply a liquid impermeable coating, cut a window aperture, and separately bond a window piece of plastics film over the aperture. By providing a single layer as both a liquid impermeable barrier coating and a window, the manufacture of the blank is streamlined, and the integrity of the finished container is improved.
Preferably, the liquid impermeable layer is resistant to grease, fat and other liquids found in foods. The layer is also preferably susceptible to RF welding and/or heat sealing. Plastics materials, for example polyethylene or acrylic, are
suitable.
The substrate of the blank may be formed from paperboard.
Sealing is further improved if the blank comprises one or more webbing sections between adjacent panels. These webbing sections may comprise two webbing portions with a fold line therebetween, to aid folding of the blank.
Preferably, one webbing portion comprises an aperture to allow access to the liquid impermeable film once the webbing sections are folded.
For ease of manufacture, the liquid impermeable coating may be applied before the final shape of the blank is cut and/or before fold lines and any apertures in webbing sections are formed.
Accordingly, the present invention also provides a method of forming a blank for a container, comprising the steps of forming a substrate, applying a liquid impermeable layer to said substrate, and cutting said substrate and liquid impermeable layer combination to shape.
Alternatively, a substrate may be formed coated with a heat sealable layer prior to cutting to shape to form a blank.
According to a further aspect of the present invention there is provided a method of forming a food product container, comprising steps of folding a blank comprising a webbing section between two panels which, when the blank is assembled, form two abutting walls of the container, and bonding the webbing section to the outside of said container once formed.
Forming a container by the method described eliminates all cut edges from the interior of the finished container, minimising the chances of fat and oil ingress and, thereby, improving integrity of the container.
The webbing section may be formed from two webbing portions with a fold line therebetween. It is beneficial to the sealing of the finished container if these two webbing portions are bonded to one another before the webbing section is bonded to the container.
An aperture is preferably provided in one webbing portion, and is positioned, when folding the blank, against the outside of the container. Common bonding means may then be used to bond both webbing portions to the wall of the container.
Preferably the bonding is achieved by heat sealing, for example through the use of a heat sealable coating provided on one surface of the blank. Modified tooling, specific for the task in hand, will greatly simplify the container forming process.
A better understanding of the present invention will be obtained from the following detailed description of particular embodiments. The description is given by way of example only and makes reference to the accompanying drawings in which: Figure 1 is a plan view of a blank according to a first embodiment; Figure 2 shows the blank of Figure 1 after some initial folding; Figure 3 shows the blank of Figure 2 close to the end of folding; Figure 4 is a perspective view of a container formed from the blank shown in Figure 1; Figure 5 is a plan view of a blank according to a further embodiment; Figure 6 shows the blank of Figure 5 after some initial folding; Figure 7 shows the blank of Figure 5 close to the end of folding; and Figure 8 is a perspective view of a container formed from the blank shown in Figure 5.
The figures show blanks for a sandwich container and a noodle pot in unassembled, part assembled and assembled states. It will be understood that the invention is also applicable to blanks for containers for a variety of different purposes.
Referring first to Figure 1, a blank is shown with webbing sections 20 between panels 4, 5 which will, in use, form abutting walls of a container 7 shown in Figure 4. The webbing sections of this particular embodiment comprise two substantially similar portions 20a, 20b with a webbing fold line 21 therebetween. Between each webbing portion 20a, 20b and an adjacent panel 5, 4; a panel fold line 9 is provided. One of the webbing portions 20b is provided with an aperture 8 which in this embodiment takes the form of a circular hole, but may be an aperture of any shape, or other discontinuity in the webbing portion 20b as indicated by dotted line 10 for example, spaced from the webbing fold line 21. The dotted line 10 shows a discontinuity in the form of a cut-away section removing part of a free edge 22b of the webbing portion 20b.
A coating (not shown) may be applied over the entire visible surface of the blank. A flange-forming portion 11 is also shown around the edge of the blank.
A flange fold line 6 is provided between the flange forming portion 11 and the panels 4,5. In this embodiment, the fold lines 2, 3, 6, 9, 211 are all formed as creases.
When the blank is folded to form a container the webbing sections 20 fold like a concertina at their panel fold lines 9, and webbing fold lines 21 and lie flat against the side panels 4. The blank once folded forms a container with an opening defined by the flange fold line 6 between the outside edges of the panels 4, 5 and the flange forming portions 11. Once folded into shape the panels 4 are bonded to the webbing sections 20. The provision of the holes 8 allows bonding means applied to the side panels 4 to bond to both webbing portions 20a, 20b. A number of bonding means are applicable, but in this embodiment adhesive (not shown) is applied to the side panels 4. The adhesive is preferably applied only in the four discrete areas which will fall under the holes 8. Thereby adhesive applied to the side panels 4 passes through the holes 8 in the webbing areas 20b, and bonds the side panels 4 directly to the webbing areas 20a. Alternatively, the adhesive may be applied to the entire area which will fall under the webbing portions 20b. In this case a seal is created by the adhesive bonding both webbing portions 20a, 20b to the side panel 4 of the finished container 7.
Figures 2 and 3 show two stages of folding of the blank to form a finished container. Figure 2 shows the initial part of the folding process, with the panel fold lines 9 being folded in the opposite direction to the webbing fold lines 21 to provide the concertina type fold described above. The holes 8 can be seen approaching the side panels 4 of the blank. Figure 3 shows the blank almost completely folded. The webbing fold lines 21 are shown protruding into the inside of the container and the holes 8 are just visible within the concertina fold adjacent the side panels 4. Figure 3 also shows the flange forming portion 11 being folded back at the flange fold lines 6.
Referring now to Figure 4, with the same reference numerals used for like components, there is shown a fully assembled container 7 from the blank of Figure 1. The holes 8 are now completely covered by the webbing sections 20a, and hence are not shown in the drawing. It can be seen that the webbing fold lines 21 of the webbing sections 20 extend right to the opening of the container.
As a result, the cut lines 22a, 22b at the edge of the blank, are adjacent the flange fold line 6 at the edge of the sidepanel 4. This arrangement means that no cut edges are exposed on the interior of the container, which minimises the possibility of ingress of fat or oil. Successful bonding of the container is still possible due to the provision of the holes 8 in the webbing portions 20b.
Figure 5 shows a plan view of a blank 101 according to a further embodiment of the invention. The blank 101 is suitable for the formation of a noodle pot, but the various features shown are equally applicable to blanks for the formation of sandwich containers, or containers for a number of different purposes.
As in the blank 1 of Figure 1, the blank 101 has webbing sections 120 between panels 104, 105 which will, in use, form abutting walls of a container 107 shown in Figure 8. Two webbing portions 120a, 120b make up each webbing section 120. A webbing fold line 121 is provided between the first webbing portion 120a and the second webbing portion 120b. The second webbing portion 120b is shown with an aperture 108 therethrough, although this is not essential. A flange forming portion 111 is also provided around the edge of the blank 101 to form a flange when the container 107 is in its folded state. The blank 101 of Figure 5 has a rectangular base panel 110 having a major and minor sides. The larger wall panels 104 extend from each of the major sides of the base panel 110. Major base fold lines 103 are provided between the base panel 110 and the larger side panels 104. Similarly, minor base fold lines 102 are provided between each minor side of the base panel 110 and each smaller side panel 105. Panel fold lines 109 are provided between the webbing section and each side panel 104, 105, and flange fold lines 106 between each side panel 104, 105 and the flange forming section 111 of the blank 101. The flange forming portion 111 is provided in three separate parts, one part joined to each smaller side panel 105, and one part joined to one of the larger side panels 104. Each side panel 104, 105 is in the shape of an isosceles trapezium, such that the folded container 107 has an opening larger than its base panel 110.
Unlike the sandwich box blank 1 of Figure 1, the blank 101 of Figure 5 further includes a lid panel 124. The lid panel 124 extends from the edge of one of the larger side panels 104 opposite to the base panel 110. A lid fold line 126 is provided between the lid panel 124 and the larger side panel 104. A window portion 128 spans the lid panel 124 and the major side panel 104, crossing the lid fold line 126. The window portion 128 comprises a transparent plastics material.
The method of forming the blank 101 of Figure 5 will now be described.
A substrate material, in this instance paperboard, is die cut to a suitable size, and an aperture is die cut to form the window portion 128 of the finished blank 101. A liquid impermeable film, for example polyethylene, is then laminated over the entire substrate, filling in the window portion 128. The two layer laminate material is then die cut to the desired shape for the finished blank 101, fold lines 102, 103, 106, 109, 121, 126 are formed, as creases, where required, and apertures 108 are die cut in the second webbing portions 120b. The finished blank 101 therefore benefits from a single, continuous coating which serves as both a liquid impermeable film inside the container 107 once folded to prevent grease, fat or other liquids present in the food product from soaking into the paperboard substrate, and as a window portion 128 in the finished container 107. The coating can additionally, or alternatively, serve as a heat sealable film to bond the container 107 together.
By providing a single coating layer serving a number of purposes, the manufacturing process is simplified. Also, the lack of discontinuities in the coating means that the integrity of the finished container 107 is also improved.
This integrity can be further improved by forming the container 107 in a particular way, as described below with reference to Figures 6 to 8.
A blank 101, as shown in Figure 5 is formed as described above. The side panels 104, 105 are folded towards each other to form a tub-like shape, with a heat sealable film on the inside. As the side panels 104, 105 are folded at the major base fold lines 103 and minor base fold lines 102, the panel fold lines 109 will naturally fold in the opposite direction to the webbing fold lines 121, causing the webbing sections 120 to concertina. This concertina action is shown in Figure 6. Significantly, the webbing sections 120 should, at this stage, be made to fold to the outside of the container 107.
When the larger side panels 104 and the smaller side panels 105 are in abutment, the first webbing portions 120a and the second webbing portions 120b are pressed together and heat sealed to one another. The base panel 110, larger side panels 104 and smaller side panels 105 now form a substantially sealed tub shape, with no part of the folded blank 101 extending into the interior. The sealed webbing sections 120 extend outwards from the corners of the tub formed by the side panels 104, 105 as shown in Figure 7.
A small amount of the heat sealable film provided on each first webbing portion 120a is visible through the aperture 108 provided in each of the second webbing portions 120b. The webbing sections 120 are folded back against the outside of the tub, such that the aperture 108 of each second webbing portion 120b lies against the outside of a smaller side panel 105. The webbing sections are then heat sealed to the outside of the smaller side panels 105 to provide greater structural strength to the container 107, and to improve the seal. The flange forming portions 111 are folded back to form a flange to which the lid panel 124 can seal once food has been placed in the container 107. The finished container 107 is shown in Figure 8. The lid panel 124 can be heat sealed, RF welded or bonded by some other suitable means.
By forming the container 107 as described above, a good seal can be formed.
Typically, webbing portions 120 are folded to the inside of a finished container 107, where the edges of said webbing portions are susceptible to the ingress of fats and oils from food provided in the container 107. Folding the webbing outwardly, as herein described, avoids these problems. Furthermore, by folding the webbing sections 120 to the outside when forming the container 107, they are more easily accessible for heat sealing to one another, which provides a better seal for the finished container.
The method described above would also be applicable to containers of other shapes and configurations, for example, where a lid is provided as a separate component. Also, while the provision of apertures in the webbing is preferable, it is by no means required. A blank 101 could be folded as above, with the webbing sections bounded together by heat sealing or other means, and then simply glued to the outside of the container.
The present invention is not limited to the specific embodiments described above. Alternative arrangements will be apparent to a reader skilled in the art.
For example the shape and form of the webbing sections may vary from that shown, as may the shape of the container. A lid may additionally be provided, either as a separate component or as an additional panel of the blank.
Claims (75)
1. A blank for assembly into a food product container comprising a substrate layer and a liquid impermeable layer, the liquid impermeable layer being applied over the entire substrate layer and forming a window over an aperture provided in the substrate layer.
2. A blank according to claim 1, wherein the liquid impermeable layer is susceptible to RF welding.
3. A blank according to claim I or 2, wherein the liquid impermeable layer is a plastics material.
4. A blank according to claim 3, wherein the liquid impermeable layer is polyethylene or acrylic.
5. A blank according to any of the preceding claims, wherein the substrate is of paperboard.
6. A blank according to any of the preceding claims, wherein a webbing section is provided between two panels which, when the blank is assembled, form two abutting walls of the container.
7. A blank according to claim 6, wherein an aperture is provided in the webbing section.
8. A blank according to claims 6 or 7, wherein the webbing section comprises two webbing portions with a fold line therebetween.
9. A blank according to any of the preceding claims, wherein the liquid impermeable layer is susceptible to heat sealing.
10. A blank for assembly into a food product container having a webbing section between two panels which, when the blank is assembled, form two abutting walls of the container, the webbing section comprising two webbing portions with a fold line therebetween, one of said webbing portions comprising a discontinuity spaced from the fold line so as to allow bonding means to bond one of the abutting walls to the other one of said webbing portions when the blank is assembled.
11. A blank according to claim 10, wherein the fold line is of a length such that, when the blank is assembled into a container, the end of the fold line is adjacent an opening of the container provided to receive food product.
12. A blank according to claim 10 or 11, wherein the discontinuity is an aperture.
13. A blank according to claims 10 to 12, wherein a barrier coating is provided on at least one surface of the blank.
14. A blank according to claim 13, wherein the barrier coating is susceptible to heat sealing.
15. A blank according to claim 13 or 14, wherein the barrier coating is susceptible to RF welding.
16. A blank according to any of claims 13 to 15, wherein the barrier coating is of a plastics material.
17. A blank according to claim 16, wherein the coating is of polyethylene or acrylic.
18. A blank according to any of claims 10 to 17, wherein the blank is of paperboard.
19. A blank according to claim 8 or any of claims 10 to 18, wherein the fold line provided is a crease in the blank.
20. A blank according to any of the preceding claims further comprising a substantially rectangular central panel with opposed pairs of major and minor sides, and two pairs of further panels integrally connected to the central panel at the major and minor sides respectively, one pair of side panels having side edges which extend at oblique angles to the sides of the central panel.
21. A blank according to claim 20, wherein both pairs of side panels have side edges which extend at oblique angles to the sides of the central panel.
22. A blank according to any of the preceding claims, wherein panels are provided to form a flange portion around an opening formed for receiving food when the blank is assembled.
23. A blank according to any of the preceding claims, wherein a panel is provided to form a closable lid when the blank is assembled.
24. A blank according to any of the preceding claims, further comprising bonding means.
25. A blank according to claim 24, wherein said bonding means is provided on one of the abutting walls.
26. A blank according to claim 24 or 25, wherein said bonding means comprises adhesive.
27. A blank for assembly into a food product container having a webbing section between two panels which, when the blank is assembled, form two abutting walls of the container, the webbing section comprising two webbing portions with a fold line therebetween, the fold line being of such a length that, when the blank is assembled into a container, the end of the fold line is adjacent an opening of the container provided to receive food product.
28. A blank according to claim 27, wherein one of said webbing portions comprises a discontinuity spaced from the fold line so as to allow bonding means to bond one of the abutting walls to the other one of said webbing portions when the blank is assembled.
29. A blank according to claim 28, wherein the discontinuity is an aperture.
30. A blank according to any of claims 27 to 29, wherein the fold line provided is a crease in the blank.
31. A blank according to any of claims 27 to 30, wherein a barrier coating is provided on at least one surface of the blank.
32. A blank according to claim 31, wherein the barrier coating is susceptible to heat sealing.
33. A blank according to claim 31 or 32, wherein the barrier coating is susceptible to RF welding.
34. A blank according to any of claims 31 to 33, wherein the barrier coating is of a plastics material.
35. A blank according to claim 34, wherein the coating is of polyethylene or acrylic.
36. A blank according to any of claims 27 to 35, further comprising a substantially rectangular central panel with opposed pairs of major and minor sides, and two pairs of further panels integrally connected to the central panel at the major and minor sides respectively, one pair of side panels having side edges which extend at oblique angles to the sides of the central panel.
37. A blank according to claim 36, wherein both pairs of side panels have side edges which extend at oblique angles to the sides of the central panel
38. A blank according to any of claims 27 to 37, wherein panels are provided to form a flange portion around an opening formed for receiving food when the blank is assembled.
39. A blank according to any of claims 27 to 38, wherein a panel is provided to form a closable lid when the blank is assembled.
40. A blank according to any of claims 27 to 39, wherein the blank is of paperboard.
41. A blank according to any of claims 27 to 40, further comprising bonding means.
42. A blank according to claim 41, wherein said bonding means is provided on one of the abutting walls.
43. A blank according to claim 41 or 42, wherein said bonding means comprises adhesive.
44. A food product container formed from a blank as claimed in any of claims I to 26.
45. A food product container formed by folding and heat sealing a blank as claimed in claim 9 or 14.
46. A food product container formed from a blank as claimed in any of claims 10 to 19, wherein bonding means is provided and extends through said discontinuity.
47. A container according to claim 46, wherein the bonding means extends to said other one of said webbing portions.
48. A food product container formed from a blank as claimed in any of claims 27 to 43.
49. A sandwich container according to any of claims 44 to 48.
50. A noodle pot according to any of claims 44 to 48.
51. A method of forming a food product container, comprising steps of folding a blank comprising a webbing section between two panels which when the blank is assembled, form two abutting walls of the container, and bonding the webbing section to the outside of said container once formed.
52. A method according to claim 51, wherein the webbing section comprises two webbing portions with a fold line there between.
53. A method according to claim 52, wherein the two webbing portions are bonded to one another before the webbing section is bonded to the outside of the container.
54. A method according to claim 52 or 53, wherein an aperture is provided in one of the two webbing portions.
55. A method according to claim 54, wherein the webbing section is folded against the outside of the container such that the webbing portion comprising the aperture lies against the container wall.
56. A method according to any of claims 51 to 55 wherein the bonding is achieved by heat sealing.
57. A method of forming a food product container comprising the steps of taking a blank as described in any of claims 7 to 19, and applying adhesive to bond the panels and webbing section.
58. A method according to claim 57, wherein the adhesive is applied to one of the abutting walls.
59. A method according to claim 58, wherein the adhesive is applied to the entire area which will fall under the webbing section.
60. A method of forming a food product container comprising the steps of taking a blank as described in any of claims 8 to 19 and applying adhesive to an area of one of the abutting walls which will fall under the discontinuity in the webbing section, to bond the panels and the webbing section.
61. A method of forming a food product container comprising the steps of taking a blank as described in any of claims 27 to 43 and applying adhesive to bond the panels and webbing portions.
62. A method according to claim 61, wherein the adhesive is applied to one of the abutting walls.
63. A method according to claim 62, wherein the adhesive is applied to the entire area which will fall under the webbing portions.
64. A method according to any of claims 61 to 63, wherein the adhesive is applied to the webbing portions.
65. A method according to claim 64, wherein the adhesive applied to the webbing portions is applied on the side of the blank which will form the outside of the container.
66. A method of forming a blank for a container, comprising the steps of forming a substrate, applying a liquid impermeable layer to said substrate, and cutting said substrate and liquid impermeable layer combination to shape.
67. A method of forming a blank for a container, comprising the steps of forming a substrate, applying a heat sealable layer to said substrate, and cutting said substrate and heat sealable layer combination to shape.
68. A method of forming a blank according to claim 66 or 67, wherein the layer is applied to the substrate by lamination.
69. A method of forming a blank according to any of claims 66 to 68, further comprising the step of cutting an aperture in the substrate before the layer is applied.
70. A method of forming a blank according to any of claims 66 to 69, further comprising the step of forming creases in the blank after the layer has been applied.
71. A method of forming a blank according to any of claims 66 to 70, further comprising the step of cutting apertures in the blank after the layer has been applied.
72. A blank for a container substantially as herein described with reference to Figures 1, 2, 3, 5, 6 and 7 of the accompanying drawings.
73. A food product container substantially as herein described with reference to Figures 4 and 8 of the accompanying drawings.
74. A method of forming a blank for a container substantially as herein described
75. A method of forming a container substantially as herein described.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GBGB0618845.2A GB0618845D0 (en) | 2006-09-25 | 2006-09-25 | A container |
Publications (2)
Publication Number | Publication Date |
---|---|
GB0718702D0 GB0718702D0 (en) | 2007-11-07 |
GB2442327A true GB2442327A (en) | 2008-04-02 |
Family
ID=37421568
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GBGB0618845.2A Ceased GB0618845D0 (en) | 2006-09-25 | 2006-09-25 | A container |
GB0718702A Withdrawn GB2442327A (en) | 2006-09-25 | 2007-09-25 | Food container |
Family Applications Before (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GBGB0618845.2A Ceased GB0618845D0 (en) | 2006-09-25 | 2006-09-25 | A container |
Country Status (6)
Country | Link |
---|---|
EP (1) | EP2091825B1 (en) |
AT (1) | ATE503689T1 (en) |
DE (1) | DE602007013603D1 (en) |
DK (1) | DK2091825T3 (en) |
GB (2) | GB0618845D0 (en) |
WO (1) | WO2008037986A1 (en) |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2447128A (en) * | 2007-02-28 | 2008-09-03 | St Neots Packaging Ltd | Tamper resistant sandwich container |
GB2457943A (en) * | 2008-02-29 | 2009-09-02 | Colpac Ltd | Film coated blank for forming foodstuff container |
ITBS20110164A1 (en) * | 2011-11-30 | 2013-05-31 | Arti Grafiche Reggiane & Lai S P A | CUTTING BOX AND METHOD OF REALIZATION |
FR3016347A1 (en) * | 2014-01-14 | 2015-07-17 | Global Print Papers | SINGLE-SIZE CUP OR POT FOR SQUARE SHAPE, CONSISTING OF A SINGLE PIECE OF CARDBOARD. THIS POT IS A WIDE OPENING, SEALED, OPERCULABLE, WITH EDGES RIGIDIFIED BY A PROFILE AND WELDED CORNERS |
GB2525924A (en) * | 2014-05-09 | 2015-11-11 | Roland William Page | Improved blanks and/or containers for food |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2261128A1 (en) | 2009-06-12 | 2010-12-15 | Zalpak B.V. | A blank and method suitable for sandwich packaging |
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US2218246A (en) * | 1936-03-03 | 1940-10-15 | Eastman Kodak Co | Window container stock and container made therefrom |
JPH07205969A (en) * | 1994-01-14 | 1995-08-08 | Mitsubishi Plastics Ind Ltd | Blank sheet |
GB2309026A (en) * | 1996-01-12 | 1997-07-16 | Monge Fernon Maurice De | Packages having product viewing windows |
US20010032794A1 (en) * | 2000-01-13 | 2001-10-25 | Kazuhisa Fushihara | Packaging box for golf ball |
FR2843910A1 (en) * | 2002-09-03 | 2004-03-05 | S C E B B Soc Civ Ile D Expl D | PROCESS FOR MANUFACTURING A PACKAGING BY FORMING AND FIXING A BLANK IN SEMI-RIGID MATERIAL |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
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FR1417288A (en) * | 1964-09-29 | 1965-11-12 | Cie Francaise Du Mono Service | Cup dispenser packaging |
US3398041A (en) * | 1966-06-22 | 1968-08-20 | Eastern Splash Mats Inc | Wrapper material |
FR2421816A1 (en) * | 1978-04-07 | 1979-11-02 | Dupuy Eng Sa | Packaging sheet comprising printed transparent film over rigid support - so that the print pattern is not affected by adhesives or creases |
US20030136687A1 (en) * | 2002-01-23 | 2003-07-24 | Abel Michael Van | Window ream wrap |
-
2006
- 2006-09-25 GB GBGB0618845.2A patent/GB0618845D0/en not_active Ceased
-
2007
- 2007-09-25 GB GB0718702A patent/GB2442327A/en not_active Withdrawn
- 2007-09-25 AT AT07804396T patent/ATE503689T1/en not_active IP Right Cessation
- 2007-09-25 EP EP07804396A patent/EP2091825B1/en not_active Revoked
- 2007-09-25 WO PCT/GB2007/003653 patent/WO2008037986A1/en active Application Filing
- 2007-09-25 DK DK07804396.5T patent/DK2091825T3/en active
- 2007-09-25 DE DE602007013603T patent/DE602007013603D1/en active Active
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2218246A (en) * | 1936-03-03 | 1940-10-15 | Eastman Kodak Co | Window container stock and container made therefrom |
JPH07205969A (en) * | 1994-01-14 | 1995-08-08 | Mitsubishi Plastics Ind Ltd | Blank sheet |
GB2309026A (en) * | 1996-01-12 | 1997-07-16 | Monge Fernon Maurice De | Packages having product viewing windows |
US20010032794A1 (en) * | 2000-01-13 | 2001-10-25 | Kazuhisa Fushihara | Packaging box for golf ball |
FR2843910A1 (en) * | 2002-09-03 | 2004-03-05 | S C E B B Soc Civ Ile D Expl D | PROCESS FOR MANUFACTURING A PACKAGING BY FORMING AND FIXING A BLANK IN SEMI-RIGID MATERIAL |
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2447128A (en) * | 2007-02-28 | 2008-09-03 | St Neots Packaging Ltd | Tamper resistant sandwich container |
GB2447128B (en) * | 2007-02-28 | 2009-04-01 | St Neots Packaging Ltd | Container for snack food |
GB2457943A (en) * | 2008-02-29 | 2009-09-02 | Colpac Ltd | Film coated blank for forming foodstuff container |
ITBS20110164A1 (en) * | 2011-11-30 | 2013-05-31 | Arti Grafiche Reggiane & Lai S P A | CUTTING BOX AND METHOD OF REALIZATION |
FR3016347A1 (en) * | 2014-01-14 | 2015-07-17 | Global Print Papers | SINGLE-SIZE CUP OR POT FOR SQUARE SHAPE, CONSISTING OF A SINGLE PIECE OF CARDBOARD. THIS POT IS A WIDE OPENING, SEALED, OPERCULABLE, WITH EDGES RIGIDIFIED BY A PROFILE AND WELDED CORNERS |
GB2525924A (en) * | 2014-05-09 | 2015-11-11 | Roland William Page | Improved blanks and/or containers for food |
GB2525924B (en) * | 2014-05-09 | 2017-03-01 | William Page Roland | Improved blanks and/or containers for food |
Also Published As
Publication number | Publication date |
---|---|
WO2008037986A1 (en) | 2008-04-03 |
ATE503689T1 (en) | 2011-04-15 |
GB0618845D0 (en) | 2006-11-01 |
EP2091825B1 (en) | 2011-03-30 |
EP2091825A1 (en) | 2009-08-26 |
DE602007013603D1 (en) | 2011-05-12 |
GB0718702D0 (en) | 2007-11-07 |
DK2091825T3 (en) | 2011-07-18 |
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Legal Events
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WAP | Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1) |