Selectively microwave-permeable membrane susceptor systems
AssigneeAdvanced Dielectric Technologies, Inc.
InventorGlenn J. Walters
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Abstract
A selectively permeable membrane microwave susceptor for use in food packaging is disclosed. The susceptor comprises a substrate having at least one absorbing coating and at least one reflecting coating deposited thereon. Either one or both of the absorbing coating or the reflecting coating can be varied to control the amount of microwave energy reaching the absorbing coating, thereby controlling the overall amount of susceptor heating.
Claims44
A microwave susceptor for use in food packaging, the susceptor comprising:
- a) at least one substantially microwave-transparent substrate, the substrate having opposed surfaces;
- b) at least one microwave-absorptive coating disposed as a pattern upon at least one of said opposed surfaces, said microwave-absorptive coating constructed and arranged to absorb microwave energy and generate heat;
- and
- c) at least one microwave-reflective coating disposed as a pattern proximate to at least one of said opposed surfaces, said microwave-reflective coating constructed and arranged to reflect microwave energy, to thereby reduce the amount of such microwave energy that reaches the microwave-absorptive coating when the susceptor is exposed to a microwave energy field.
A package structure for microwave cooking of food, comprising:
- a receptacle for holding of food to be cooked;
- a microwave susceptor affixed to at least a portion of the receptable, said susceptor optionally in contact with the food, the susceptor comprising;
- a) at least one substantially microwave-transparent substrate, the substrate having opposed surfaces;
- b) at least one microwave-absorptive coating disposed upon at least one of said opposed surfaces, said microwave-absorptive coating constructed and arranged to absorb microwave energy and generate heat;
- and
- c) at least one microwave-reflective coating disposed as a pattern proximate to at least one of said opposed surfaces to thereby reduce the amount of such microwave energy that reaches the microwave-absorptive coating when the susceptor is exposed to a microwave energy field, said microwave-reflective coating constructed and arranged to reflect microwave radiation.
A microwave susceptor for use in food packaging, the susceptor comprising:
- (a) at least one substantially microwave-transparent substrate, the substrate having opposed surfaces;
- (b) at least one microwave-absorptive coating disposed as a pattern upon at least one of said opposed surfaces;
- and
- (c) at least one microwave-reflective coating disposed as a plurality of separate reflective regions separated by nonreflective regions, the coating proximate to at least one of said opposed surfaces, said microwave reflective coating constructed and arranged to reflect an amount of microwave radiation sufficient to prevent heating of the microwave-absorptive coating to a level which leads to deformation and volatilization of the microwave-transparent substrate.
Dependencies are inferred from the claim text.