CA2135280A1 - Moulded container - Google Patents
Moulded containerInfo
- Publication number
- CA2135280A1 CA2135280A1 CA 2135280 CA2135280A CA2135280A1 CA 2135280 A1 CA2135280 A1 CA 2135280A1 CA 2135280 CA2135280 CA 2135280 CA 2135280 A CA2135280 A CA 2135280A CA 2135280 A1 CA2135280 A1 CA 2135280A1
- Authority
- CA
- Canada
- Prior art keywords
- moulded
- tray
- container
- side wall
- corrugated
- 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.)
- Abandoned
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D1/00—Containers having bodies formed in one piece, e.g. by casting metallic material, by moulding plastics, by blowing vitreous material, by throwing ceramic material, by moulding pulped fibrous material, by deep-drawing operations performed on sheet material
- B65D1/34—Trays or like shallow containers
Landscapes
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Mechanical Engineering (AREA)
- Containers Having Bodies Formed In One Piece (AREA)
- Cartons (AREA)
Abstract
2135280 9323294 PCTABS00028 A moulded tray comprising a blank of single-face corrugated board having a liner element (L) and a corrugated element (C) moulded to define a base (1), an upstanding side wall (2) and an outwardly directed rim (3), the base (1) and side wall (2) and the side wall (2) and the rim (3) being connected by smoothly radiussed regions (4 and 5) whereby the currugated element (C) substantially retains its integrity in the radiussed regions to thereby provide a moulded tray having increased rigidity.
Description
~ 1 3 r~ 2 t~ ~3 s ` W~93/23294 PCT/~U93/00194 MOULDED CONT~INER
Field of the Invention ,-This invention relates to moulded containers suitabXe for supporting fox display and containing food and other products.
The invention ~inds application in a wide range of containers, including moulded trays for food products such as meats, c~kes and various forms of so-called fast-foods, and lidded containérs sui~able for ~ood p~oducts such as hamhurgers, pizzas and all other forms of fas~-foods.
Backoround of the Invention Food products such as meats, cakes etc. are usually displayed in supermarkets on shallow trays covered by a plastic film. The most widely used tray is the moulded polystyrene foam ,.
tray which is durable and may be manufactured at relatively low cost. Similarly, containers having integrally hinged or separate lids are also moulded from polystyrene foam and are wîdely used to package fast-foods su~h as ha~urgers.
~oulded polystyrene foam trays and containers are being increasingly criticized for their i~pact on pollution of the environment and ~heir:lack of re~yclability. H4wever, ~ntil the present invention, few if any practical alternatives of comparable cost have been developed by the packaging industry.
For example, mouldad trays and integrally hinged lidded containers, such as hamburger cartons, have been made from so-called box board, but such t~ays and containers are prohibitively expensi~e when made from sufficiently rigid box board materials.
When made from lighter box board material , the trays and containers have insufficient strength to provide an acceptable alternative to the polystyrene foam products.
Single-face corrugated board is widely used in the packaging industry as a cushioning material. It is not traditionally used to form cartons or boxes, although ~roposals have be~n made in AU-B-30298/63 (277947) to use modifled ~ingle-face orrugated board for this purpose, and in AU-B-44160/64 (284298~ to use multi-ply wound single-face board to form tubular containars.
Nei~her of these proposals has found commercial acceptance due to ~he greater strength and more widely accepted use of standard 213;~2~
W093t23294 i PCT/AU93/00194 (double-face~ corrugated board in the packaging industry. It has never been proposed to make moulded containers or trays from single-face corrugated board, the expectation being that it~would not be possible to form moulded containers and trays from such material. It has been surprisingly found by the present applicant that by moulding 5ingle-face corrugated board in a particular configuration, containers and trays are able to be moulded in a manner which retains its shape for the typical life of such a product and provides a product having acceptable strength properties.
~ummary of the invention The invention provides a moulded container or tray suitable for food products, comprising a blank of single-face corrugated board having a liner element and a corrugated element moulded to define a base, an upstanding side wall and a rim, characterized by smoothly radiussed regions between the base and said side wall said corrugated element subs~antially retaining its integrity in said radiussed regions to provide a moulded container or tray of the required rigidity.
By moulding the container or tray from single-face corrugated board and m~intaining, by means of the smoothly radiussed regions, the integrity of the corrugations in the corruga~ed element of the board except at the corners where deformation must occur to shape the product, a product having equivalent or superior rigidity when compared with a moulded polystyrene foam produc+ is produced with none of the environmental disadvantages associated with moulded polystyrene foam products.
The container or tray is preferahly moulded from single-face .corrugated board which has been coated to increase its water and hea~ resistance and to further increase its rigidity and to retain its moulded shape~ although advantage may be gained by coati~g only t~e corrugated element. Various acrylic or modified acrylic resins known in the packaging industry may be used for this purpose and have the advanta~e that they are biodegradable and approved for use in $he food industry.
In one preferred embodiment described in great~r deta 1 213~i28(~ ~:
.; W093/23~94 PCT/AU93/00194 below, the invention finds applicati~ as a food product tray.
Howe~er, the invention is equally ap~,licable to other moulded ¦
containers, such as hamburger and pizza containers h~ving integrally hinged lids and shaped in the nature of a so-called clam shell container. :
The invention fur*~er provides a me~hod of forming a moulded container or tray comprising the steps of forming a shaped blank from single-face corrugated board having a liner el~ment and a corrugated element, moulding the blank under h . at and pressure to form a moulded container or tray havi~g a base, an upstanding side wall and rim, said moulding being performed to provide smoothly radiussed regions between the base and the side wall to maintain the integrity of the corrugated element in these regions to thereby form a moulded container or tray having the re~uired rigidity.
In a preferred form of the invention, the single face corrugated board is preferably made from paper which has been treated to increase its resistance to moisture and heat and increases the rigidity of the moulded product. A suitable coa~ing comprises any one of numerous acrylic or modified acrylic resins used in the packaging industry~ :
Brief description of the drawinas In the accompanying drawings:
Figure 1 is a perspective view of a moulded tray embodying the invention;
Figure 2 is a plan view of the moulded tray, and Figure 3 is a side eleva~ion showing a half sectivn through the corrugationsO
I ~escription of preferred e~bodiment Referring to the drawings, a moulded tray ~hodying the inve~tion is seen to comprise a base portion l, a side por$ion
Field of the Invention ,-This invention relates to moulded containers suitabXe for supporting fox display and containing food and other products.
The invention ~inds application in a wide range of containers, including moulded trays for food products such as meats, c~kes and various forms of so-called fast-foods, and lidded containérs sui~able for ~ood p~oducts such as hamhurgers, pizzas and all other forms of fas~-foods.
Backoround of the Invention Food products such as meats, cakes etc. are usually displayed in supermarkets on shallow trays covered by a plastic film. The most widely used tray is the moulded polystyrene foam ,.
tray which is durable and may be manufactured at relatively low cost. Similarly, containers having integrally hinged or separate lids are also moulded from polystyrene foam and are wîdely used to package fast-foods su~h as ha~urgers.
~oulded polystyrene foam trays and containers are being increasingly criticized for their i~pact on pollution of the environment and ~heir:lack of re~yclability. H4wever, ~ntil the present invention, few if any practical alternatives of comparable cost have been developed by the packaging industry.
For example, mouldad trays and integrally hinged lidded containers, such as hamburger cartons, have been made from so-called box board, but such t~ays and containers are prohibitively expensi~e when made from sufficiently rigid box board materials.
When made from lighter box board material , the trays and containers have insufficient strength to provide an acceptable alternative to the polystyrene foam products.
Single-face corrugated board is widely used in the packaging industry as a cushioning material. It is not traditionally used to form cartons or boxes, although ~roposals have be~n made in AU-B-30298/63 (277947) to use modifled ~ingle-face orrugated board for this purpose, and in AU-B-44160/64 (284298~ to use multi-ply wound single-face board to form tubular containars.
Nei~her of these proposals has found commercial acceptance due to ~he greater strength and more widely accepted use of standard 213;~2~
W093t23294 i PCT/AU93/00194 (double-face~ corrugated board in the packaging industry. It has never been proposed to make moulded containers or trays from single-face corrugated board, the expectation being that it~would not be possible to form moulded containers and trays from such material. It has been surprisingly found by the present applicant that by moulding 5ingle-face corrugated board in a particular configuration, containers and trays are able to be moulded in a manner which retains its shape for the typical life of such a product and provides a product having acceptable strength properties.
~ummary of the invention The invention provides a moulded container or tray suitable for food products, comprising a blank of single-face corrugated board having a liner element and a corrugated element moulded to define a base, an upstanding side wall and a rim, characterized by smoothly radiussed regions between the base and said side wall said corrugated element subs~antially retaining its integrity in said radiussed regions to provide a moulded container or tray of the required rigidity.
By moulding the container or tray from single-face corrugated board and m~intaining, by means of the smoothly radiussed regions, the integrity of the corrugations in the corruga~ed element of the board except at the corners where deformation must occur to shape the product, a product having equivalent or superior rigidity when compared with a moulded polystyrene foam produc+ is produced with none of the environmental disadvantages associated with moulded polystyrene foam products.
The container or tray is preferahly moulded from single-face .corrugated board which has been coated to increase its water and hea~ resistance and to further increase its rigidity and to retain its moulded shape~ although advantage may be gained by coati~g only t~e corrugated element. Various acrylic or modified acrylic resins known in the packaging industry may be used for this purpose and have the advanta~e that they are biodegradable and approved for use in $he food industry.
In one preferred embodiment described in great~r deta 1 213~i28(~ ~:
.; W093/23~94 PCT/AU93/00194 below, the invention finds applicati~ as a food product tray.
Howe~er, the invention is equally ap~,licable to other moulded ¦
containers, such as hamburger and pizza containers h~ving integrally hinged lids and shaped in the nature of a so-called clam shell container. :
The invention fur*~er provides a me~hod of forming a moulded container or tray comprising the steps of forming a shaped blank from single-face corrugated board having a liner el~ment and a corrugated element, moulding the blank under h . at and pressure to form a moulded container or tray havi~g a base, an upstanding side wall and rim, said moulding being performed to provide smoothly radiussed regions between the base and the side wall to maintain the integrity of the corrugated element in these regions to thereby form a moulded container or tray having the re~uired rigidity.
In a preferred form of the invention, the single face corrugated board is preferably made from paper which has been treated to increase its resistance to moisture and heat and increases the rigidity of the moulded product. A suitable coa~ing comprises any one of numerous acrylic or modified acrylic resins used in the packaging industry~ :
Brief description of the drawinas In the accompanying drawings:
Figure 1 is a perspective view of a moulded tray embodying the invention;
Figure 2 is a plan view of the moulded tray, and Figure 3 is a side eleva~ion showing a half sectivn through the corrugationsO
I ~escription of preferred e~bodiment Referring to the drawings, a moulded tray ~hodying the inve~tion is seen to comprise a base portion l, a side por$ion
2 and a rim portion 3, with the base and side portions l and 2 conn~cted by a smoothly radiussed p~rtion 4 and the side portion and rim portion 2 and 3 co~nected by a further smoo~hly radiussed portion 5. The tray is moulded from a shaped blank of single-~ace corrugated board having a liner medium M and a corrugated medium C, with the corrugations directed inwardly of the tray.
2 ~ ~ ~ 2 ~
, W093/23294 PC~/AU93/00194 '-.
By moulding the tray with smoothly radiussed portions 4 and 5, the integrity of the corrugations of the corrugated medium C in these regions is substantially maintained thereby produc~ng a moulded product having superior rigidity. ~ .
The blank is creased in the regions which will be occupied by ~he corners of the moulded tray to re~uce cracking of the board in these regions and to promote retention of the moulded shape. The creases are clearly visible in figures 1 and 3 of the drawings.
To increase the resistance to moisture and heat of the moulded tray and to further increase the rigidity of the tray, the single face board is preferab~y coated with an acrylic resin or a modified ac~ylic.res~n of the type commonly used in the packaging industry. The coating is most conveniently performed on the paper medium which subsequently deines the liner and the corrugated medium in the single face board blank. By modified acrylic resin is intended acrylic resins to which a cross linking agen~ known in the art has heen added to increase the hardness o the resultant coating, or modified base resins, such as styrenated acrylic resins.
The moulding process is perfo~med under heat and pressure, and to reduce the Iikelihood of cracks developing in the corrugated board product, the blank should have a moisture content substanti~lly falling in the range eight to ten per cent.
Generous clearances are maintained between the male and female platens of the moulding die to further ensure t~e integrity of the corrugations in the corrugated ~edium C at all regions of the product except at the corners referred to above where the blank is pre-creased to encourage bunching of the material to defi~e the desired shape of the moulded tray.
Coating of the single-face board with a suitable acrylic resin or modified acrylic resin is prefer bl~ performed before ' ~~
the liners are cor~ugated and glued together. The use of a coated product not only improves the retention of the moulded sha~e and increases the rigidity of the product but also reduces the likelihood of crackin~ of the board by pro~iding a seal ~o the exposed paper s~rface and allowing the paper and coating to 213~2~J -~i : W093/ 3294 P~T/~U93/~194 -.
soften and flex under the heat and pressure used in the moulding process~ After moulding, the coating cools and hardens to maintain the moulded shape and to increase the rigidity of the , -productO
It will be appreciated from the above that products manufactured in accordance with the in~ention have the following advantages:
1. They have equivalent or superior str~ngth when compared with moulded polystyrene foam products, - :~
2. They have ade~uate resistance to moisture and heat,
2 ~ ~ ~ 2 ~
, W093/23294 PC~/AU93/00194 '-.
By moulding the tray with smoothly radiussed portions 4 and 5, the integrity of the corrugations of the corrugated medium C in these regions is substantially maintained thereby produc~ng a moulded product having superior rigidity. ~ .
The blank is creased in the regions which will be occupied by ~he corners of the moulded tray to re~uce cracking of the board in these regions and to promote retention of the moulded shape. The creases are clearly visible in figures 1 and 3 of the drawings.
To increase the resistance to moisture and heat of the moulded tray and to further increase the rigidity of the tray, the single face board is preferab~y coated with an acrylic resin or a modified ac~ylic.res~n of the type commonly used in the packaging industry. The coating is most conveniently performed on the paper medium which subsequently deines the liner and the corrugated medium in the single face board blank. By modified acrylic resin is intended acrylic resins to which a cross linking agen~ known in the art has heen added to increase the hardness o the resultant coating, or modified base resins, such as styrenated acrylic resins.
The moulding process is perfo~med under heat and pressure, and to reduce the Iikelihood of cracks developing in the corrugated board product, the blank should have a moisture content substanti~lly falling in the range eight to ten per cent.
Generous clearances are maintained between the male and female platens of the moulding die to further ensure t~e integrity of the corrugations in the corrugated ~edium C at all regions of the product except at the corners referred to above where the blank is pre-creased to encourage bunching of the material to defi~e the desired shape of the moulded tray.
Coating of the single-face board with a suitable acrylic resin or modified acrylic resin is prefer bl~ performed before ' ~~
the liners are cor~ugated and glued together. The use of a coated product not only improves the retention of the moulded sha~e and increases the rigidity of the product but also reduces the likelihood of crackin~ of the board by pro~iding a seal ~o the exposed paper s~rface and allowing the paper and coating to 213~2~J -~i : W093/ 3294 P~T/~U93/~194 -.
soften and flex under the heat and pressure used in the moulding process~ After moulding, the coating cools and hardens to maintain the moulded shape and to increase the rigidity of the , -productO
It will be appreciated from the above that products manufactured in accordance with the in~ention have the following advantages:
1. They have equivalent or superior str~ngth when compared with moulded polystyrene foam products, - :~
2. They have ade~uate resistance to moisture and heat,
3~ They may be made from rerycled materials whicn are bio~egradable and may in turn be recycled.
4. The positioning of the corrugations inside the ~ontainer reduces food adhesion and increases insulative properties, and may obviate the need for blood absorbing inserts such as are used in the packaging of meat. The ability of the corrugated medium to absorb such liquids may be controlled by modifying the coating applied to the corrugated medium.
Claims (9)
1. A moulded container or tray suitable for food products, comprising a blank of single-face corrugated board having a liner element and a corrugated element moulded to define a base, an upstanding side wall and a rim, characterized by smoothly radiussed regions between the base and said side wall, said corrugated element substantially retaining its integrity in said radiussed regions to provide a moulded container or tray of the required rigidity.
2. The container or tray of claim 1, wherein said rim has an outwardly directed portion connected to said side wall by further smoothly radiussed regions.
3. The container or tray of claim 1 or 2, wherein at least said corrugated element has a coating to increase its resistance to moisture and heat and to further increase its rigidity and to retain its moulded shape.
4. The container or tray of claim 3, wherein the coating is a selected acrylic resin coating or a modified acrylic resin coating.
5. The container of any preceding claim, further comprising a lid moulded in a similar form to said container and hinged to said container along part of its rim.
6. A method of forming a moulded container or tray comprising the steps of forming a shaped blank from single-face corrugated board having a liner element an a corrugated element, moulding the blank under heat and pressure to form a moulded container or tray having a base, an upstanding side wall and rim, said moulding being performed to provide smoothly radiussed region between the base and the side wall to maintain the integrity of the corrugated element in these regions to thereby form a moulded container or tray having the required rigidity.
7. The method of claim 6, furthering comprising moulding the blank to form an outwardly directed rim connected to said side wall by further smoothly radiussed regions.
8. The method of claim 6 or 7, further comprising the step of coating at least the corrugated element of said blank to increase its resistance to moisture and heat and to increase the rigidity of the moulded product and to retain its moulded shape.
9. The method of claim 8, wherein the coating is a selected acrylic resin coating or a modified acrylic resin coating.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AUPL233292 | 1992-05-08 | ||
| AUPL2332 | 1992-05-08 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2135280A1 true CA2135280A1 (en) | 1993-11-25 |
Family
ID=3776151
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA 2135280 Abandoned CA2135280A1 (en) | 1992-05-08 | 1993-05-03 | Moulded container |
Country Status (5)
| Country | Link |
|---|---|
| EP (1) | EP0639139A4 (en) |
| JP (1) | JPH08504705A (en) |
| CA (1) | CA2135280A1 (en) |
| NZ (1) | NZ252645A (en) |
| WO (1) | WO1993023294A1 (en) |
Families Citing this family (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5577989A (en) * | 1994-06-20 | 1996-11-26 | Newark Group Industries, Inc. | Method for forming corrugated paper container and container made therefrom |
| US6364203B2 (en) | 1998-03-19 | 2002-04-02 | The Procter & Gamble Company | Articulable food container |
| US6491214B2 (en) | 1998-04-17 | 2002-12-10 | The Procter & Gamble Company | Multi-ply food container |
| US6415944B1 (en) | 1998-08-27 | 2002-07-09 | The Procter & Gamble Company | Articulable container |
| US6179203B1 (en) | 1998-08-28 | 2001-01-30 | The Procter & Gamble Company | Selectively reinforced multi-ply food container |
| NL1010120C2 (en) * | 1998-09-17 | 2000-03-21 | Foodcorner International B V | Slice carrier for foodstuffs as well as method and device for making the slice carrier. |
| US7681733B2 (en) | 2002-08-29 | 2010-03-23 | Colbert Packaging Corporation | Packaging container with criss-cross grain pattern having product holding chambers and method for making the same |
| AU2002357587A1 (en) * | 2002-08-30 | 2004-03-29 | Ishibashi Co., Ltd. | Three-dimensionally shaped corrugated fiberboard and its producing method |
| US7878356B2 (en) | 2009-05-04 | 2011-02-01 | Pactiv Corporation | Convertible container and plate |
| US7878355B2 (en) | 2009-05-04 | 2011-02-01 | Pactiv Corporation | Convertible container and plate |
| JP6259010B2 (en) * | 2016-05-25 | 2018-01-10 | 株式会社クラウン・パッケージ | Multi-layered paper |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE118974C (en) * | ||||
| SE398595B (en) * | 1973-08-06 | 1978-01-09 | Duni Bila Ab | CARDBOARD PLATE |
| US4421825A (en) * | 1981-12-28 | 1983-12-20 | Champion International Corporation | Paperboard coated to minimize browning |
| DE3378949D1 (en) * | 1982-04-13 | 1989-02-23 | James River Dixie Northern Inc | Rigid paperboard container and method and apparatus for producing the same |
| NL8900341A (en) * | 1989-02-13 | 1990-09-03 | Wilhelmus Jan Reinier Karel Sn | Under-sheet for meat products - is of paper and cardboard with layer of grease- and water-proof material |
| US5094385A (en) * | 1990-03-12 | 1992-03-10 | Antczak Edwin A | Container |
| JPH06502831A (en) * | 1990-11-26 | 1994-03-31 | ヴァイシー ボード プロパティーズ プロプライエタリー リミテッド | fast food food containers |
| AU635667B2 (en) * | 1991-01-29 | 1993-03-25 | Amcor Limited | A container |
-
1993
- 1993-05-03 WO PCT/AU1993/000194 patent/WO1993023294A1/en not_active Application Discontinuation
- 1993-05-03 JP JP5519699A patent/JPH08504705A/en active Pending
- 1993-05-03 EP EP93911680A patent/EP0639139A4/en not_active Withdrawn
- 1993-05-03 CA CA 2135280 patent/CA2135280A1/en not_active Abandoned
- 1993-05-03 NZ NZ25264593A patent/NZ252645A/en unknown
Also Published As
| Publication number | Publication date |
|---|---|
| EP0639139A4 (en) | 1997-01-29 |
| NZ252645A (en) | 1995-11-27 |
| WO1993023294A1 (en) | 1993-11-25 |
| JPH08504705A (en) | 1996-05-21 |
| EP0639139A1 (en) | 1995-02-22 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| FZDE | Dead |