CA1153069A
Expired / Lapsed
CA
⏱️ 0.0 years remaining
Food receptacle for microwave cooking
Assignee: Individual
•
Filing: 1980-03-03
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Granted: 1983-08-30
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Expires: 2000-03-03
Abstract
Abstract FOOD RECEPTACLE FOR MICROWAVE COOKING ABSTRACT OF THE DISCLOSURE A disposable food receptacle for use in microwave cooking is disclosed which includes a provision to brown the exterior of the food in the receptacle. A thin layer of an electrically conductive material, such as an elemental metal is incorporated into the receptacle on the food contacting surfaces thereof, so that the conductive layer will become heated by the microwave radiation and will, in turn, brown the exterior of the food in the receptacle. The conductive layer is form as an extremely thin film deposited on a substrate protective layer by a process of vacuum vapor deposition.
Inventors
- 👤 Oscar E. Seiferth
Bibliographic Details
Application Number
—
Jurisdiction
CA
Data Source
google_patents
Last Synchronized
2026-10-29 14:23
CPC Classifications
A; A47; A47J; A47J36/00; A47J36/02; A47J36/022; B; B32; B32B; B32B27/00; B32B27/36; B32B27/06; B32B27/10; B65; B65D; B65D81/00; B65D81/34; B65D81/3446; B32B2255/00; B32B2255/10; B32B2255/20; B32B2255/205; B32B2307/00; B32B2307/30; B32B2307/308; B32B2439/00; B32B2439/70; B65D2581/00; B65D2581/34; B65D2581/3437; B65D2581/3463; B65D2581/3466; B65D2581/3471; B65D2581/3472; B65D2581/3479; B65D2581/3486; B65D2581/3494
Claims Analysis
Total Claims: 32
Claim 1
Independent Claim
54 words
In a food preparation receptacle for use in microwave cooking of foods the improvement comprising: a layer of electrically conductive elemental metal incorporated into the receptacle, the layer of metal being sufficiently thin so as to be rapidly heated upon exposure to Microwave radiation and cause surface browning of the food in the receptacle.
Claim 2
Dependent Claim
54 words
In a food preparation receptacle for use in microwave cooking of foods the improvement comprising: a layer of electrically conductive elemental metal incorporated into the receptacle, the layer of metal being sufficiently thin so as to be rapidly heated upon exposure to Microwave radiation and cause surface browning of the food in the receptacle.
Claim 3
Dependent Claim
34 words
In a food preparation receptacle for use in micro-wave cooking of foods the improvement as claimed in Claim 1 wherein the metal layer has a resistivity greater than about .4 ohms per square inch.
Claim 4
Dependent Claim
26 words
In a food preparation receptacle for use in micro-wave cooking of foods the improvement as claimed in Claim 1 wherein the layer of metal is aluminum.
Claim 5
Dependent Claim
85 words
A food preparation receptacle for use in microwave cooking of foods comprising: a stock material formed into a suitably shaped structure to carry the desired food; a protective layer formed on the food contacting surfaces of the stock material; and a layer of aluminum arranged between the protective layer and the stock material, the aluminum layer having a thickness of less than about 700 angstroms so that the aluminum layer will be heated when exposed to microwave radiation to brown the food in the receptacle.
Claim 6
Dependent Claim
85 words
A food preparation receptacle for use in microwave cooking of foods comprising: a stock material formed into a suitably shaped structure to carry the desired food; a protective layer formed on the food contacting surfaces of the stock material; and a layer of aluminum arranged between the protective layer and the stock material, the aluminum layer having a thickness of less than about 700 angstroms so that the aluminum layer will be heated when exposed to microwave radiation to brown the food in the receptacle.
Claim 7
Dependent Claim
24 words
A food preparation receptacle as claimed in Claim 4 wherein the aluminum layer has a thickness of between about 30 and about 700 angstroms.
Claim 8
Dependent Claim
23 words
A food preparation receptacle as claimed in Claim 4 wherein the protective layer is formed of a thermoplastic resin having high heat stability.
Claim 9
Dependent Claim
20 words
A food preparation receptacle as claimed in Claim 6 wherein the thermoplastic resin in the protective layer is a polyester.
Claim 10
Dependent Claim
19 words
A food preparation receptacle as claimed in Claim 7 wherein the aluminum layer is deposited on the polyester layer.
Claim 11
Dependent Claim
23 words
A food preparation receptacle as claimed in Claim 8 wherein the aluminum layer is deposited by vacuum vapor deposition on the polyester layer.
Claim 12
Dependent Claim
14 words
A preparation receptacle as claimed in Claim 4 wherein the stock material is paperboard.
Claim 13
Dependent Claim
102 words
A food preparation receptacle for use in micro wave cooking of foods comprising: a stock material formed into a suitably shaped structure so as to carry the desired food; a protective layer formed on the food contacting surfaces of the stock material; and a layer of electrically conductive elemental metal arranged between the protective layer and the stock material, the metal layer being of a suitable thickness so as to have an electrical resistivity of at least about .4 ohms per square inch so that it will be heated when exposed to micro wave radiation to brown the food in the receptacle.
Claim 14
Dependent Claim
102 words
A food preparation receptacle for use in micro wave cooking of foods comprising: a stock material formed into a suitably shaped structure so as to carry the desired food; a protective layer formed on the food contacting surfaces of the stock material; and a layer of electrically conductive elemental metal arranged between the protective layer and the stock material, the metal layer being of a suitable thickness so as to have an electrical resistivity of at least about .4 ohms per square inch so that it will be heated when exposed to micro wave radiation to brown the food in the receptacle.
Claim 15
Dependent Claim
14 words
A food receptacle as claimed in Claim 11 wherein the metal layer is aluminum.
Claim 16
Dependent Claim
25 words
A food receptacle as claimed in Claim 11 wherein the resistivity of the metal layer is between about .4 and 8 ohms per square inch.
Claim 17
Dependent Claim
21 words
A food receptacle as claimed in Claim 11 wherein the protective layer is a sheet of high temperature stability thermoplastic material.
Claim 18
Dependent Claim
21 words
A food receptacle as claimed in Claim 12 wherein the metal layer is deposited on one surface of the thermo-plastic film.
Claim 19
Dependent Claim
21 words
A food receptacle as claimed in Claim 15 wherein the metal is deposited on the thermoplastic film by vacuum vapor deposition.
Claim 20
Dependent Claim
14 words
A food receptacle as claimed in Claim 11 wherein the stock material is paperboard.
Claim 21
Dependent Claim
86 words
A food preparation receptacle for use in microwave cooking of foods comprising: a stock material formed in a suitably shaped structure so as to carry the desired food; a protective layer formed on the food contacting surfaces of the stock material; and a thin layer of electrically conductive elemental metal deposited by vacuum vapor deposition on the protective layer and positioned between the protective layer and the stock material, the metal layer being heated upon exposure to microwave radiation to brown the food in the receptacle.
Claim 22
Dependent Claim
86 words
A food preparation receptacle for use in microwave cooking of foods comprising: a stock material formed in a suitably shaped structure so as to carry the desired food; a protective layer formed on the food contacting surfaces of the stock material; and a thin layer of electrically conductive elemental metal deposited by vacuum vapor deposition on the protective layer and positioned between the protective layer and the stock material, the metal layer being heated upon exposure to microwave radiation to brown the food in the receptacle.
Claim 23
Dependent Claim
14 words
A food preparation receptacle as claimed in Claim 18 wherein the metal is aluminum.
Claim 24
Dependent Claim
102 words
A food preparation receptacle for use in microwave cooking of foods comprising: a stock material formed into a suitably shaped structure so as to carry the desired food; a protective layer formed on the food contacting surfaces of the stock material; and a layer of electrically conductive elemental metal arranged between the protective layer and the stock material, the metal layer being of a suitable thickness so as to have such an electrical resistivity that it will be rapidly heated when exposed to microwave radiation to brown the exterior of food in the receptacle during the normal micro-wave cooking of that food.
Claim 25
Dependent Claim
102 words
A food preparation receptacle for use in microwave cooking of foods comprising: a stock material formed into a suitably shaped structure so as to carry the desired food; a protective layer formed on the food contacting surfaces of the stock material; and a layer of electrically conductive elemental metal arranged between the protective layer and the stock material, the metal layer being of a suitable thickness so as to have such an electrical resistivity that it will be rapidly heated when exposed to microwave radiation to brown the exterior of food in the receptacle during the normal micro-wave cooking of that food.
Claim 26
Dependent Claim
82 words
A disposable food package comprising: a low density insulating stock material of suitable shape and structure to contain the food; a protective layer adhered to the food contacting surfaces of the stock material; and a thin layer of electrically conductive material deposited on the protective layer and arranged between the protective layer and the stock material the layer of electrically conductive material being rapidly heated upon exposure to microwave radiation so as to brown the surface of the food in the package.
Claim 27
Dependent Claim
82 words
A disposable food package comprising: a low density insulating stock material of suitable shape and structure to contain the food; a protective layer adhered to the food contacting surfaces of the stock material; and a thin layer of electrically conductive material deposited on the protective layer and arranged between the protective layer and the stock material the layer of electrically conductive material being rapidly heated upon exposure to microwave radiation so as to brown the surface of the food in the package.
Claim 28
Dependent Claim
14 words
A food package as claimed in Claim 21 wherein the stock material is paperboard.
Claim 29
Dependent Claim
21 words
A food package as claimed in Claim 21 wherein the layer of conductive material includes a layer of conductive elemental metal.
Claim 30
Dependent Claim
14 words
A food package as claimed in Claim 23 wherein the elemental metal is aluminum.
Claim 31
Dependent Claim
22 words
A food package as claimed in Claim 23 wherein the metal layer is formed by vacuum vapor deposition on the protective layer.
Claim 32
Dependent Claim
14 words
A food package as claimed in Claim 21 wherein the protective layer is polyester.
References Cited (Backward Citations)
No citation records indexed.
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