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US 2003/0111463 A1Published application
Abuse-tolerant metallic pattern arrays for microwave packaging materials
AssigneeGraphic Packaging Corporation
InventorLaurence M.C. Lai
Life of this patent
Estimating the term…
Abstract
An abuse-tolerant microwave food packaging material includes an array of solid shapes of microwave energy reflective material, for example, of aluminum foil, disposed on a substrate. The an array of shapes of microwave energy reflective material shield microwave energy from a food product while remaining substantially resistant to arcing or burning under abusive cooking conditions in an operating microwave oven.
Claims45
An abuse-tolerant microwave packaging material comprising:
- a substrate;
- and
- a plurality of solid shapes comprised of microwave energy reflective material arranged in an array, wherein said array is also supported by said substrate;
- wherein each of said plurality of solid shapes further comprises:
- a respective predetermined shape;
- and
- a respective predetermined size;
- and
- wherein each of said plurality of solid shapes in said array is spaced apart from each adjacent shape by a respective predetermined spacing;
- and
- wherein a combination of said predetermined shape, said predetermined size, and said predetermined spacing provides substantial resistance to arcing or burning of said packaging material under abusive cooking conditions in an operating microwave oven.
8 more elements
A method of manufacturing a microwave packaging material comprising:
- providing a substrate;
- and
- adhering a microwave energy reflective layer to said substrate;
- wherein said microwave energy reflective layer comprises a plurality of solid shapes comprised of microwave energy reflective material arranged in an array;
- and
- wherein each of said plurality of shapes further comprises:
- a respective predetermined shape;
- and
- a respective predetermined size;
- and
- wherein each of said plurality of solid shapes in said array is spaced apart from each adjacent shape by a respective predetermined spacing;
- and
- wherein a combination of said predetermined shape, said predetermined size, and said predetermined spacing provides substantial resistance to arcing by or burning of said microwave packaging material under abusive cooking conditions in an operating microwave oven.
10 more elements
An abuse-tolerant microwave shielding material comprising:
- a substrate;
- and
- an array of solid shapes of microwave reflective material supported upon said substrate;
- wherein each of said solid shapes further comprises:
- a respective predetermined shape;
- and
- a respective predetermined size;
- and
- wherein each of said solid shapes in said array is spaced apart from each adjacent solid shape by an equal distance with respect to each adjacent solid shape;
- and
- wherein said abuse-tolerant microwave shielding material reflects between 80 and 85 percent of microwave energy incident upon said shielding material when said shielding material is placed in an operating microwave oven;
- and
- wherein a combination of said predetermined shape, said predetermined size, and said spacing provides substantial resistance to arcing by or burning of said abuse-tolerant microwave shielding material under abusive cooking conditions in said operating microwave oven.
10 more elements
An improvement to reusable, microwave-safe cookware, the improvement comprising:
- an abuse-tolerant microwave shielding material further comprising
- a substrate;
- and
- an array of solid shapes of microwave reflective material supported upon said substrate;
- wherein each of said solid shapes further comprises:
- a respective predetermined shape;
- and
- a respective predetermined size;
- and
- wherein each of said solid shapes in said array is spaced apart from each adjacent solid shape by an equal distance with respect to each adjacent solid shape;
- and
- wherein said abuse-tolerant microwave shielding material is applied to said reusable cookware;
- wherein said abuse-tolerant microwave shielding material reflects between 80 and 85 percent of microwave energy incident upon said shielding material when said microwave-safe cookware is placed in an operating microwave oven;
- and
- wherein a combination of said predetermined shape, said predetermined size, and said spacing provides substantial resistance to arcing by or burning of said abuse-tolerant microwave shielding material under abusive cooking conditions in said operating microwave oven.
12 more elements
Dependencies are inferred from the claim text.