Abuse-tolerant metallic packaging materials for microwave cooking
AssigneeGraphic Packaging Corporation
InventorsNeilson Zeng, Laurence Lai, Anthony Russell
Life of this patent
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Abstract
An abuse-tolerant microwave food packaging material includes repeated sets of metallic foil or high optical density evaporated material segments disposed on a substrate. Each set of metallic segments is arranged to define a perimeter having a length equal to a predetermined ratio of the operating, or effective wavelength of a microwave oven. The repeated sets of segments act both as a shield to microwave energy and as focusing elements for microwave energy when used in conjunction with food products yet remaining electrically safe in the absence of the food products.
Claims48
An abuse-tolerant microwave packaging material comprising
- a continuously repeated first set of metallic foil segments on a substrate, wherein each first set of metallic segments defines a first perimeter having a length approximately equal to a predetermined ratio of an operating wavelength of a microwave oven, and wherein each segment in each first set is spaced apart from adjacent segments.
An abuse-tolerant microwave packaging material comprising
- a continuously repeated first set of segments formed of a high optical density evaporated material, the repeated first set of segments located on a substrate, wherein each first set of segments defines a first perimeter having a length approximately equal to a predetermined ratio of an operating wavelength of a microwave oven, and wherein each segment in each first set is spaced apart from adjacent segments.
Dependencies are inferred from the claim text.