Patterned microwave susceptor
AssigneeGraphic Packaging International, Inc.
InventorsLorin R. Cole, Terrence P. Lafferty
Life of this patent
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Abstract
The heating effect of a microwave susceptor can be improved by providing a pattern of microwave transparent areas in the susceptor. The transparent areas are preferably circles having a diameter of about 0.5 inch. The distance between adjacent circles is preferably about 0.5 inch. The susceptor may be used to brown and crispen the crust of frozen pizza heated in a microwave oven. The crust of the pizza is browner, especially at its central area, than the crust of pizza heated using a conventional susceptor.
Claims16
A microwave susceptor comprising:
- a dimensionally stable substrate;
- a plastic film supported by the dimensionally stable substrate;
- and
- an electrically continuous metal layer deposited on the lastic film, the metal layer of a thickness that it absorbs microwave radiation and converts microwave energy into heat;
- the metal layer defining a plurality of apertures within the metal layer only;
- wherein
- each of the plurality of apertures has a major linear dimension of about one-eighth an operating wavelength of a microwave oven;
- and
- each of the plurality of apertures is spaced apart from the others.
A microwave susceptor comprising:
- a dimensionally stable substrate;
- a plastic film supported by the dimensionally stable substrate;
- and
- an electrically continuous metal layer deposited on the plastic film, the metal layer of a thickness that it absorbs microwave radiation and converts microwave energy into heat;
- the metal layer defining a plurality of apertures within the metal layer only;
- wherein
- each of the plurality of apertures is spaced apart from the others;
- and
- each of the plurality of apertures increases the heat generated by the metal layer in an area immediately adjacent to the perimeter of each of the plurality of apertures.
A microwave susceptor comprising:
- a dimensionally stable substrate;
- a plastic film supported by the dimensionally stable substrate;
- and
- an electrically continuous metal layer deposited on the plastic film, the metal layer of a thickness that it absorbs microwave radiation and converts microwave energy into heat;
- the metal layer defining a plurality of microwave inactive areas within the metal layer only;
- wherein
- each of the plurality of microwave inactive areas fins a major linear dimension of about one-eighth an operating wavelength of a microwave oven;
- and
- each of the plurality of microwave inactive areas is spaced apart from the others.
A microwave susceptor comprising:
- a dimensionally stable substrate;
- a plastic film supported by the dimensionally stable substrate;
- and
- an electrically continuous metal layer deposited on the plastic film, the metal layer of a thickness that it absorbs microwave radiation and converts microwave energy into heat;
- the metal layer defining a plurality of microwave inactive areas within the metal layer only;
- wherein
- each of the plurality of microwave inactive areas is spaced apart from the others;
- and
- each of the plurality of microwave inactive areas increases the heat generated by the metal layer in an area immediately adjacent to the perimeter of each of the plurality of microwave inactive areas.
Dependencies are inferred from the claim text.