Electric heating – Metal heating – Of cylinders
Patent
1978-11-07
1980-07-08
Reynolds, B. A.
Electric heating
Metal heating
Of cylinders
219 1055R, 174 35MS, H05B 906
Patent
active
042119103
ABSTRACT:
A high requency heating apparatus including a door assembly having a high frequency energy shielding member and a plurality of glass plate members disposed in front and on the outer side of the shielding member. The distances between the shielding member and plurality of glass plate members are such that a composite-impedance Z.sub.T made up of the impedance of the shielding member, the impedance of the glass plate members and the impedance of the space around the heating apparatus becomes approximately equal to or smaller than the composite impedance Z.sub.s made up of the impedance of the shielding member and the impedance of the external space in the absence of the glass plate member for reducing microwave leakage at the front portion of the door assembly.
REFERENCES:
patent: 3436508 (1969-04-01), Fritz
patent: 3511959 (1970-05-01), White
patent: 3629537 (1971-12-01), Haagensen
patent: 3678238 (1972-07-01), Yasuoka et al.
patent: 3711673 (1973-01-01), Takeda et al.
patent: 3866009 (1975-02-01), Ishino et al.
patent: 4010343 (1977-03-01), Tanaka et al.
patent: 4028519 (1977-06-01), De Weese et al.
Kusunoki Shigeru
Tanaka Junzo
Leung Philip H.
Matsushita Electric - Industrial Co., Ltd.
Reynolds B. A.
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