WO2003015591A1 - An improved insulated container or the like - Google Patents
An improved insulated container or the like Download PDFInfo
- Publication number
- WO2003015591A1 WO2003015591A1 PCT/AU2002/000997 AU0200997W WO03015591A1 WO 2003015591 A1 WO2003015591 A1 WO 2003015591A1 AU 0200997 W AU0200997 W AU 0200997W WO 03015591 A1 WO03015591 A1 WO 03015591A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- outer layer
- stage
- product
- layer
- insulated
- Prior art date
Links
Classifications
-
- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47J—KITCHEN EQUIPMENT; COFFEE MILLS; SPICE MILLS; APPARATUS FOR MAKING BEVERAGES
- A47J41/00—Thermally-insulated vessels, e.g. flasks, jugs, jars
- A47J41/0055—Constructional details of the elements forming the thermal insulation
Definitions
- the present invention relates to an improved insulated container or the like.
- the invention has particular application in the catering, hospital and food service industries.
- One of the fundamental concerns of any caterer is to deliver the prepared food to the receiving party at the correct food temperature. In hospitals and nursing homes this is typically achieved by placing each individual meal or serve in an appropriately configured insulated container. The container is normally then fitted with a lid and delivered to the patient. The person then eats the food from that insulated container.
- containers used for this purpose offer sufficient insulation as well as having a pleasing aesthetic appearance.
- Such containers should also be relatively strong, so as to withstand repeated use. Ideally such containers should be safe for use in dishwashers and microwave.
- the present invention seeks to provide an improved form of such an insulated product or container.
- an insulated product including an inner layer and an outer layer, said inner layer being made from a plastics material which is injection moulded into a first stage of a multi-stage tool, said outer layer being made from a mixture of a plastics material and a foaming agent, said mixture being injection moulded over at least a portion of said inner layer and into a second stage of said multi-stage tool and wherein the outer layer includes a plurality of voids so that the outer layer acts as an insulating layer.
- the multi-stage tool is a two-stage tool.
- the insulated product is preferably a unitary product which incorporates said inner and outer layers.
- the plastics material from which the inner layer is made is a food grade polypropylene.
- the plastics material from which the outer layer is made is a food grade polypropylene.
- the foaming agent is preferably of a grade such that at a predetermined temperature it is activated to cause expansion of the material causing the voids to form therein. The voids being sufficient to achieve the desired insulating characteristics of the outer layer.
- the plastics materials used to make the insulated product are such that the product is dishwasher and microwave safe.
- the plastics materials are preferably also such that the insulated product is boil proof, odour, stain and chemical resistant.
- the inner layer has an exposed surface which is substantially smooth.
- the outer layer preferably has an exposed surface which may be textured to enhance grip of the product by a user.
- the insulated product is preferably of the type used in the catering industry to store or serve food and/or drink.
- the insulated product may be a container, plate, bowl, cup, saucer, lid, jug, can or bottle holder, serving cover or tray.
- an insulated product including a container and a lid, each of said container and lid including an inner layer and an outer layer, said inner layer being made from a plastics material which is injection moulded into a first stage of a multi-stage tool, said outer layer being made from a mixture of a plastics material and a foaming agent, said mixture being injection moulded over a portion of said inner layer and into a second stage of said multi-stage tool and wherein the outer layer includes a plurality of voids so that the outer layer acts as an insulating layer.
- the multi-stage tool is a two-stage tool.
- a method of making an insulated product including the steps of injection moulding a plastics material into the first stage of a multi-stage tool so as to form a first layer of the product, injection moulding a plastics material together with a foaming agent into a second stage of a multi-stage tool so as to form an outer layer of said product, and activating said foaming agent to form a plurality of voids in said outer layer.
- the inner and outer layers form a unitary product.
- multi- , stage tool is a two-stage tool.
- the outer layer only extends over a portion of said inner layer.
- Figure 1 is a perspective view of a container and lid made in accordance with an embodiment of the invention.
- Figure 2 illustrates the inner and outer layers of each of the bowl and lid shown in Figure 1.
- the container 10 shown in Figure 1 includes a bowl 12 and a lid 14.
- Each of the bowl 12 and lid 14 are made in a two-stage injection moulding tool of the type used to manufacture two-colour or two-material plastic products.
- the typical process by which a two colour or two material product is made is that the first material is injection moulded into a first stage of a two-stage tool. This first material forms what will be subsequently described as an inner layer of the product. A second material is then injection moulded into the multi-stage tool over at least a portion of the inner layer so as to form what will subsequently be described as an outer layer of the product.
- each of the bowl 12 and lid 14 shown in Figures 1 and 2 are made substantially in accordance with the above described method.
- each of the bowl 12 and lid 14 include an inner layer 16 and an outer layer 18.
- the inner and outer layers 16, 18 are shown as separate components in Figure 2 it will be appreciated that they are actually moulded together so as to form a unitary product.
- the material used to form the inner layer 16 is a food grade polypropylene material.
- the outer layer 18 however is made from a mixture of a food grade polypropylene and a foaming agent. It will be appreciated that the foaming agent in the polypropylene activates when in the tool, under the action of heat and pressure, to produce a number of voids within the material of the outer layer 18. These voids provide the insulating properties to the outer layer 18. Accordingly, food or drink stored in the container 10 will be able to better maintain its required temperature for a limited period of time.
- the inner layer 16 of the bowl 12 and the lid 14 have an exposed surface 16a which is substantially smooth. A substantially smooth surface is adopted because of its relative ease to clean and because of its more aesthetic appearance.
- the outer layer 18 has an exposed surface 18a which is preferably textured. It is desirable for the outer surface 18a to be textured so as to enhance the grip of the bowl 12 or lid 14 by a user.
- the materials used to manufacture the inner and outer layers 16, 18 of the container 10 are preferably such that the container is dishwasher and microwave safe. It is also desirable for the containers to be boil proof, odour, stain and/or chemical resistant.
- the nature of the insulated products produced in accordance with the present invention may vary but would typically be of the type used to store or serve food and/or drink.
- the product may be a container, plate, bowl, cup, saucer, lid, jug, can or bottle holder, serving cover or tray.
- the colour of the inner and outer layers 16, 18 may vary depending on the user's requirements.
- the present invention is particularly advantageous because it provides a product with good insulating properties which is easily made in a multi-stage injection moulding tool.
- the product preferably has two layers which are moulded together to form a unitary product.
- the product is less likely to split when dropped or placed under high stress conditions than conventional three layer products which include welded seams.
- a product made in accordance with the invention also has improved rigidity and strength.
Landscapes
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Engineering & Computer Science (AREA)
- Food Science & Technology (AREA)
- Packages (AREA)
- Containers Having Bodies Formed In One Piece (AREA)
Abstract
The invention relates to an insulated product (10) having an inner layer (16) and an outer layer (18). The inner layer (16) is made from a plastics material that is injection moulded into a first stage of a multi-stage tool. The outer layer (18) is made from a mixture of a plastics material and a foaming agent. The mixture being injection moulded over a portion of said inner layer (16) and into a second stage of said multi-stage tool. The insulated product has improved insulation characteristics and is ideally suited for use in the catering industry.
Description
AN IMPROVED INSULATED CONTAINER OR THE LIKE
Field of the Invention
The present invention relates to an improved insulated container or the like. The invention has particular application in the catering, hospital and food service industries.
Background of the Invention
One of the fundamental concerns of any caterer is to deliver the prepared food to the receiving party at the correct food temperature. In hospitals and nursing homes this is typically achieved by placing each individual meal or serve in an appropriately configured insulated container. The container is normally then fitted with a lid and delivered to the patient. The person then eats the food from that insulated container.
It is important that the containers used for this purpose offer sufficient insulation as well as having a pleasing aesthetic appearance. Such containers should also be relatively strong, so as to withstand repeated use. Ideally such containers should be safe for use in dishwashers and microwave.
The present invention seeks to provide an improved form of such an insulated product or container.
Summary of the Invention
According to the present invention there is provided an insulated product including an inner layer and an outer layer, said inner layer being made from a plastics material which is injection moulded into a first stage of a multi-stage tool, said outer layer being made from a mixture of a plastics material and a foaming agent, said mixture being injection moulded over at least a portion of
said inner layer and into a second stage of said multi-stage tool and wherein the outer layer includes a plurality of voids so that the outer layer acts as an insulating layer.
Preferably, the multi-stage tool is a two-stage tool.
The insulated product is preferably a unitary product which incorporates said inner and outer layers.
Preferably, the plastics material from which the inner layer is made is a food grade polypropylene.
Preferably, the plastics material from which the outer layer is made is a food grade polypropylene. The foaming agent is preferably of a grade such that at a predetermined temperature it is activated to cause expansion of the material causing the voids to form therein. The voids being sufficient to achieve the desired insulating characteristics of the outer layer.
Preferably, the plastics materials used to make the insulated product are such that the product is dishwasher and microwave safe. The plastics materials are preferably also such that the insulated product is boil proof, odour, stain and chemical resistant.
Preferably, the inner layer has an exposed surface which is substantially smooth. The outer layer preferably has an exposed surface which may be textured to enhance grip of the product by a user.
The insulated product is preferably of the type used in the catering industry to store or serve food and/or drink. For example, the insulated product may be a container, plate, bowl, cup, saucer, lid, jug, can or bottle holder, serving cover or tray.
According to the invention there is also provided an insulated product including a container and a lid, each of said container and lid including an inner layer and an outer layer, said inner layer being made from a plastics material which is injection moulded into a first stage of a multi-stage tool, said outer layer being made from a mixture of a plastics material and a foaming agent, said mixture being injection moulded over a portion of said inner layer and into a second stage of said multi-stage tool and wherein the outer layer includes a plurality of voids so that the outer layer acts as an insulating layer.
Preferably, the multi-stage tool is a two-stage tool.
According to the invention there is also provided a method of making an insulated product including the steps of injection moulding a plastics material into the first stage of a multi-stage tool so as to form a first layer of the product, injection moulding a plastics material together with a foaming agent into a second stage of a multi-stage tool so as to form an outer layer of said product, and activating said foaming agent to form a plurality of voids in said outer layer.
Preferably, the inner and outer layers form a unitary product. Preferably, multi- , stage tool is a two-stage tool.
Preferably, the outer layer only extends over a portion of said inner layer.
Brief Description of the Drawings
An embodiment of the invention will now be described, by way of example only, with reference to the accompanying drawings in which:
Figure 1 is a perspective view of a container and lid made in accordance with an embodiment of the invention.
Figure 2 illustrates the inner and outer layers of each of the bowl and lid shown in Figure 1.
Detailed Description of the Preferred Embodiments
The container 10 shown in Figure 1 includes a bowl 12 and a lid 14. Each of the bowl 12 and lid 14 are made in a two-stage injection moulding tool of the type used to manufacture two-colour or two-material plastic products.
The typical process by which a two colour or two material product is made is that the first material is injection moulded into a first stage of a two-stage tool. This first material forms what will be subsequently described as an inner layer of the product. A second material is then injection moulded into the multi-stage tool over at least a portion of the inner layer so as to form what will subsequently be described as an outer layer of the product.
The container 12 and lid 14 shown in Figures 1 and 2 are made substantially in accordance with the above described method. As shown in Figure 2, each of the bowl 12 and lid 14 include an inner layer 16 and an outer layer 18. Although the inner and outer layers 16, 18 are shown as separate components in Figure 2 it will be appreciated that they are actually moulded together so as to form a unitary product.
The material used to form the inner layer 16 is a food grade polypropylene material. The outer layer 18 however is made from a mixture of a food grade polypropylene and a foaming agent. It will be appreciated that the foaming agent in the polypropylene activates when in the tool, under the action of heat and pressure, to produce a number of voids within the material of the outer layer 18. These voids provide the insulating properties to the outer layer 18. Accordingly, food or drink stored in the container 10 will be able to better maintain its required temperature for a limited period of time.
The inner layer 16 of the bowl 12 and the lid 14 have an exposed surface 16a which is substantially smooth. A substantially smooth surface is adopted because of its relative ease to clean and because of its more aesthetic appearance. The outer layer 18 has an exposed surface 18a which is preferably textured. It is desirable for the outer surface 18a to be textured so as to enhance the grip of the bowl 12 or lid 14 by a user.
The materials used to manufacture the inner and outer layers 16, 18 of the container 10 are preferably such that the container is dishwasher and microwave safe. It is also desirable for the containers to be boil proof, odour, stain and/or chemical resistant.
It will be appreciated that the nature of the insulated products produced in accordance with the present invention may vary but would typically be of the type used to store or serve food and/or drink. For example, the product may be a container, plate, bowl, cup, saucer, lid, jug, can or bottle holder, serving cover or tray.
It will also be appreciated that the colour of the inner and outer layers 16, 18 may vary depending on the user's requirements.
The present invention is particularly advantageous because it provides a product with good insulating properties which is easily made in a multi-stage injection moulding tool. The product preferably has two layers which are moulded together to form a unitary product. The product is less likely to split when dropped or placed under high stress conditions than conventional three layer products which include welded seams. A product made in accordance with the invention also has improved rigidity and strength.
The process for manufacturing products in accordance with an embodiment of the invention is quicker and more cost effective than the process used to manufacture prior art products.
The embodiment has been described by way of example only and modifications are possible within the spirit and scope of the invention.
Claims
1. An insulated product including an inner layer and an outer layer, said inner layer being made from a plastics material which is injection moulded into a first stage of a multi-stage tool, said outer layer being made from a mixture of a plastics material and a foaming agent, said mixture being injection moulded over at least a portion of said inner layer and into a second stage of said multistage tool and wherein the outer layer includes a plurality of voids so that the outer layer acts as an insulating layer.
2. An insulated product according to claim 1 wherein the product is a unitary product that incorporates said inner and outer layers.
3. An insulated product according to claim 1 or claim 2 wherein the outer layer only extends over a portion of the inner layer.
4. An insulated product according to any one of the preceding claims wherein the plastics material from which the inner layer is made is a food grade polypropylene.
5. An insulated product according to any one of the preceding claims wherein the plastics material from which the outer layer is made is a food grade polypropylene.
6. An insulated product according to any one of the preceding claims wherein the foaming agent is of a grade such that at predetermined temperature it is activated to cause expansion of the material of the outer layer causing said voids to form therein, said voids being arranged so as to achieve the desired insulating characteristics of the outer layer.
7. An insulated product according to anyone of the preceding claims wherein the plastics materials used to make the inner and outer layers of the insulated product are such that the product is dishwasher and microwave safe.
8. An insulated product according to anyone of the preceding claims wherein the plastics materials used to make the inner and outer layers of the insulated product are such that the insulated product is boil proof and/or odour proof and/or stain proof and/or chemical resistant.
9. An insulated product according to any one of the preceding claims wherein the inner layer has an exposed surface that is substantially smooth.
10. An insulated product according to any one of the preceding claims wherein the outer layer has an exposed surface which is textured to enhance grip of the product by a user.
11. An insulated product according to any one of the preceding claims wherein the insulated product is of the type used in the catering industry to store or serve food and/or drink.
12. An insulated product including a container and a lid, each of said container and lid including an inner layer and an outer layer, said inner layer being made from a plastics material which is injection moulded into a first stage of a multi-stage tool, said outer layer being made from a mixture of a plastics material and a foaming agent, said mixture being injection moulded over at least a portion of said inner layer and into a second stage of said multi-stage tool and wherein the outer layer includes a plurality of voids so that the outer layer acts as an insulating layer.
13. A method of making an insulated product including the steps of injection moulding a plastics material into a first stage of a multi-stage tool so as to form a first layer of the product, injection moulding a plastics material together with a foaming agent into a second stage of the multi-stage tool so as to form an outer layer of said product, and activating said foaming agent to form a plurality of voids in said outer layer.
14. A method according to claim 13 wherein said inner and outer layers form a unitary product.
15. A method according to claim 13 or claim 14 wherein the multi-stage tool is a two-stage tool.
16. A method according to any one of claims 13 to 15 wherein the outer layer only extends over a portion of said inner layer.
17. An insulated product substantially as hereinbefore described with reference to the accompanying drawings.
18. A method of making an insulated product substantially as hereinbefore described with reference to the accompanying drawings.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AUPR7075 | 2001-08-16 | ||
| AUPR7075A AUPR707501A0 (en) | 2001-08-16 | 2001-08-16 | An improved insulated container or the like |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2003015591A1 true WO2003015591A1 (en) | 2003-02-27 |
Family
ID=3831030
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/AU2002/000997 WO2003015591A1 (en) | 2001-08-16 | 2002-07-26 | An improved insulated container or the like |
Country Status (2)
| Country | Link |
|---|---|
| AU (1) | AUPR707501A0 (en) |
| WO (1) | WO2003015591A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2461933A (en) * | 2008-07-11 | 2010-01-20 | Donna Roth | Container system for storing consumables with thermal energy store |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1466239A (en) * | 1974-02-19 | 1977-03-02 | Imi Santon Ltd | Thermally insulated hot water storage container |
| EP0007777A2 (en) * | 1978-07-21 | 1980-02-06 | Thomas J. Goetting | Incubating jacket and method of making cultured dairy foods |
| GB2147989A (en) * | 1983-10-11 | 1985-05-22 | Rubber Injection Moulding Co L | Insulated milk bottle container |
| GB2172395A (en) * | 1985-03-08 | 1986-09-17 | Elizabeth Tebbutt | Insulated container assembly |
| EP0657267A2 (en) * | 1993-12-10 | 1995-06-14 | General Electric Company | Method for improving surface quality of foamed thermoplastic molded articles |
| JPH08300392A (en) * | 1995-05-10 | 1996-11-19 | Chisso Corp | Injection molding of foamable plastic composition |
| JPH08300391A (en) * | 1995-05-02 | 1996-11-19 | Chisso Corp | Injection molding of foamable plastic composition |
| JPH11201382A (en) * | 1998-01-13 | 1999-07-30 | Sekisui Chem Co Ltd | Pipe joint having heat insulation layer, and its manufacture |
-
2001
- 2001-08-16 AU AUPR7075A patent/AUPR707501A0/en not_active Abandoned
-
2002
- 2002-07-26 WO PCT/AU2002/000997 patent/WO2003015591A1/en not_active Application Discontinuation
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1466239A (en) * | 1974-02-19 | 1977-03-02 | Imi Santon Ltd | Thermally insulated hot water storage container |
| EP0007777A2 (en) * | 1978-07-21 | 1980-02-06 | Thomas J. Goetting | Incubating jacket and method of making cultured dairy foods |
| GB2147989A (en) * | 1983-10-11 | 1985-05-22 | Rubber Injection Moulding Co L | Insulated milk bottle container |
| GB2172395A (en) * | 1985-03-08 | 1986-09-17 | Elizabeth Tebbutt | Insulated container assembly |
| EP0657267A2 (en) * | 1993-12-10 | 1995-06-14 | General Electric Company | Method for improving surface quality of foamed thermoplastic molded articles |
| JPH08300391A (en) * | 1995-05-02 | 1996-11-19 | Chisso Corp | Injection molding of foamable plastic composition |
| JPH08300392A (en) * | 1995-05-10 | 1996-11-19 | Chisso Corp | Injection molding of foamable plastic composition |
| JPH11201382A (en) * | 1998-01-13 | 1999-07-30 | Sekisui Chem Co Ltd | Pipe joint having heat insulation layer, and its manufacture |
Non-Patent Citations (3)
| Title |
|---|
| DATABASE WPI Derwent World Patents Index; Class A32, AN 1997-047054/05 * |
| DATABASE WPI Derwent World Patents Index; Class A32, AN 1997-047055/05 * |
| DATABASE WPI Derwent World Patents Index; Class A88, AN 1999-82020/41 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2461933A (en) * | 2008-07-11 | 2010-01-20 | Donna Roth | Container system for storing consumables with thermal energy store |
| GB2461933B (en) * | 2008-07-11 | 2011-02-16 | Donna Roth | System and method for separately holding consumables |
Also Published As
| Publication number | Publication date |
|---|---|
| AUPR707501A0 (en) | 2001-09-06 |
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