EP0350249A2
Expired / Lapsed
EP
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Laminate structure and method of heating
Assignee: Beckett Industries Inc
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Filing: 1989-07-03
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Granted: —
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Expires: 2009-07-03
Abstract
Abstract A synergistic heating effect is attained in a microwave heat susceptor by providing a laminate containing two individual metal layers each of a thickness capable of converting a portion of microwave energy incident thereon to thermal energy.
Inventors
- 👤 Donald Gregory Beckett
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-29 20:09
CPC Classifications
B; B32; B32B; B32B15/00; B32B15/04; B32B15/08; B65; B65D; B65D81/00; B65D81/34; B65D81/3446; B65D2581/00; B65D2581/34; B65D2581/3437; B65D2581/3439; B65D2581/3452; B65D2581/3463; B65D2581/3467; B65D2581/3471; B65D2581/3472; B65D2581/3486; B65D2581/3494
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
103 words
A laminate structure, comprising (a) a first thin metal layer of a thickness capable of converting at least a portion of incident microwave energy to thermal energy, (b) a second thin metal layer of a thickness capable of converting at least a portion of incident microwave energy to thermal energy, and (c) at least one additional support layer separating the first thin metal layer from the second thin metal layer such that the thermal energy which may be generated by exposure of the laminate to microwave radiation is greater than the sum of the thermal energy provided by the two individual metal layers.
Claim 2
Dependent Claim
103 words
A laminate structure, comprising (a) a first thin metal layer of a thickness capable of converting at least a portion of incident microwave energy to thermal energy, (b) a second thin metal layer of a thickness capable of converting at least a portion of incident microwave energy to thermal energy, and (c) at least one additional support layer separating the first thin metal layer from the second thin metal layer such that the thermal energy which may be generated by exposure of the laminate to microwave radiation is greater than the sum of the thermal energy provided by the two individual metal layers.
Claim 3
Dependent Claim
30 words
A laminate as claimed in claim 1, in which each metal layer is an aluminum layer having a thickness corresponding to an optical density of about 0.08 to about 0.80.
Claim 4
Dependent Claim
27 words
A laminate as claimed in claim 2, in which each aluminum layers each has a thickness corresponding to an optical density of about 0.10 to about 0.40.
Claim 5
Dependent Claim
36 words
A laminate as claimed in any one of claims 1 to 3, in which the at least one additional support layer comprises a single polymeric film layer on which each of the metal layers is deposited.
Claim 6
Dependent Claim
29 words
A laminate as claimed in any one of claims 1 to 4, in which at least one of the metal layers is laminated to a dimensionally-stable electrically non-conducting substrate.
Claim 7
Dependent Claim
26 words
A laminate as claimed in any one of claims 1 to 4, in which both the metal layers is laminated to a dimensionally-stable electrically non-conducting substrate.
Claim 8
Dependent Claim
15 words
A laminate as claimed in claim 5 or 6, in which the substrate is paper.
Claim 9
Dependent Claim
42 words
A laminate as claimed in any one of claims 5 to 7, in which a third metal layer having a thickness corresponding to an optical density of about 0.10 to about 0.40 deposited on a third polymeric film layer is laminated thereto.
Claim 10
Dependent Claim
80 words
A laminate as claimed in claim 1, in which the first thin metal layer is deposited on a first polymeric film layer, the second thin metal layer is deposited on a second polymeric film layer, the first metal layer is laminated to a first substrate layer of dimensionally-stable electrically non-conducting material, the second metal layer is laminated to a second substrate layer of dimensionally-stable electrically non-conducting material, and the second substrate layer is laminated to the first polymeric film layer.
Claim 11
Dependent Claim
22 words
A laminate as claimed in claim 9, in which the first and second substrate layers each is provided by a paper layer.
Claim 12
Dependent Claim
50 words
A heating element for microwave heating comprising a laminate structure having at least two metal layers each of a thickness capable of converting at least a portion of incident microwave energy into thermal energy, and at least one layer of electrically non-conductive material separating succeeding metal layers in the laminate.
Claim 13
Dependent Claim
50 words
A heating element for microwave heating comprising a laminate structure having at least two metal layers each of a thickness capable of converting at least a portion of incident microwave energy into thermal energy, and at least one layer of electrically non-conductive material separating succeeding metal layers in the laminate.
Claim 14
Independent Claim
63 words
A method of heating an item comprising placing the item in contact with or in proximity to a laminate structure comprising at least two metal layers and at least one layer of electrically non-conductive material separating succeeding metal layers, and applying microwave energy to the laminate to convert at least a portion of the microwave energy into thermal energy for heating the item.
Claim 15
Independent Claim
63 words
A method of heating an item comprising placing the item in contact with or in proximity to a laminate structure comprising at least two metal layers and at least one layer of electrically non-conductive material separating succeeding metal layers, and applying microwave energy to the laminate to convert at least a portion of the microwave energy into thermal energy for heating the item.
References Cited (Backward Citations)
No citation records indexed.
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