Combined microwave and thermal drying apparatus

Details Combined microwave and thermal drying apparatus Combined microwave and thermal drying apparatus

1987-03-30

1988-05-24

Leung, Philip H.

Electric heating

Metal heating

Of cylinders

219 1055A, 219 1055B, 34 1, H05B 672

Patent

active

047469684

ABSTRACT:
In a microwave drying cavity, a thermal radiator provides infrared radiation that complements the microwave radiation in effecting a more uniform drying of a product within the cavity. The radiator includes a metal plate having apertures of a trifoliate configuration and electrical resistance-type heaters embedded in the plate. The trifoliate apertures permit microwave radiation of universal polarization to pass through the plate, so the radiator may be placed close to the product without shielding the product from the microwave radiation.

REFERENCES:
patent: 2982960 (1961-05-01), Shanks
patent: 3230483 (1966-01-01), Kinsey
patent: 3320396 (1967-05-01), Boehm
patent: 3448384 (1969-06-01), Scott
patent: 3562471 (1971-02-01), White
patent: 3845266 (1974-10-01), Derby
patent: 4015341 (1977-04-01), McKinney et al.
patent: 4230924 (1980-10-01), Brastad et al.
patent: 4301347 (1981-11-01), Quine
patent: 4347670 (1982-09-01), Wear et al.
patent: 4435629 (1984-03-01), Ishimaru et al.
patent: 4640020 (1987-02-01), Wear et al.

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