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US 4,936,935 AGranted
Microwave heating material
AssigneeBeckett Industries Inc.
InventorDonald G. Beckett
Life of this patent
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Abstract
Novel laminate structures incorporating a thin metal layer which is of a thickness capable of converting incident microwave energy into thermal energy. The thin metal layer produces a greater heating effect than is produced by the same metal layer directly supporated on a polymeric film layer. The laminate is useful in the microwave heating of a variety of food products.
Claims9
A method of forming a laminate structure, which comprises the sequential steps of:
- first applying a layer of lacquer to a polymeric substrate,
- then forming a metal film on an outer surface of the lacquer layer of a thickness such that incident microwave energy is converted thereby to thermal energy, and
- then laminating the metal film to a non-conductive heat-stable sheet.
Dependencies are inferred from the claim text.