Susceptor for heating foods in a microwave oven having metallize

Details Susceptor for heating foods in a microwave oven having metallize Susceptor for heating foods in a microwave oven having metallize

1988-11-04

1990-11-13

Leung, Philip H.

Electric heating

Metal heating

Of cylinders

219 1055F, 426107, 426234, 426243, 99DIG14, 126390, H05B 680

Patent

active

049703609

ABSTRACT:
A susceptor for heating a food substance in a microwave oven is disclosed which has a thin film of metal deposited on a dimensionally stable dielectric substrate, such as paper. Substrate having a rough surface may be used. Preferably, the susceptor has a complex impedance measured prior to heating, at the frequency of the microwave oven, which has a real part between 30 and 2000 ohms per square. The preferred thickness of the thin metal film is related to the smoothness of the paper substrate. A substrate having a surface smoothness, expressed as an arithmetic average roughness, greater than 0.5 microns may be used with the present invention. The metal film is preferably aluminum having a thickness between 50 Angstroms and 600 Angstroms. The substrate may be coated with coatings such as clay. Clay coated paper substrates having a thin film of metal deposited thereon exhibit improved stability of performance characteristics during microwave heating.

REFERENCES:
patent: 3865301 (1975-02-01), Pothier et al.
patent: 4267420 (1981-05-01), Brastad
patent: 4641005 (1987-02-01), Seiferth
patent: 4713510 (1987-12-01), Quick et al.
patent: 4735513 (1988-04-01), Watkins et al.
patent: 4785160 (1988-11-01), Hart
patent: 4800247 (1989-01-01), Schneider et al.
Marks' Standard Handbook for Mechanical Engineers,. (8th ed. 1978), pp. 6-36, 6-37.

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