Microwave heating oven having seal means for preventing the leak

Details Microwave heating oven having seal means for preventing the leak Microwave heating oven having seal means for preventing the leak

1976-06-14

1977-09-06

Grimley, Arthur T.

Electric heating

Metal heating

Of cylinders

174 35MS, H05B 906

Patent

active

040469832

ABSTRACT:
A microwave heating oven has a seal located in the path formed by a gap between the oven body and the oven door for preventing microwave leakage. The seal may comprise several seals, and includes a microwave absorber as one of the seals. The microwave absorber consists of a mixture of a powder of magnetic material and an organic high molecular weight compound. The length of the microwave absorber in the direction of propagation of microwave in the path of microwave leakage is an integral multiple of about 1/2.lambda., wherein .lambda. is a wavelength of the microwave in the microwave absorber. Absorption is improved by setting the absorber in a recess in the wall or door of the oven, or by surrounding the absorber by a metal layer except on the surface thereof parallel to the direction of propagation and facing the gap.

REFERENCES:
patent: 3525841 (1970-08-01), Haagensen et al.
patent: 3544751 (1970-12-01), Valles
patent: 3742176 (1973-06-01), Ishino et al.
patent: 3803377 (1974-04-01), Nakano
patent: 3809843 (1974-05-01), Takayama
patent: 3835283 (1974-09-01), Suzuki
patent: 3866009 (1975-02-01), Ishino et al.
patent: 3879595 (1975-04-01), Lamb
patent: 3969572 (1976-07-01), Rostek
patent: 4003840 (1977-01-01), Ishino et al.
patent: 4013861 (1977-03-01), Westfall

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