Electric heating – Heating devices – Combined with container – enclosure – or support for material...
Patent
1975-03-21
1977-10-04
Bartis, A.
Electric heating
Heating devices
Combined with container, enclosure, or support for material...
219220, 219344, 219353, 219548, 338254, 338293, 338314, H05B 100, H05B 322, F24D 1300, H01C 317
Patent
active
040525880
ABSTRACT:
A panel heater with a flat metal sheet of substantially even thickness of from 0.06 to 0.2 mm and having a mesh-like radiation section formed in the central portion of the sheet, the mesh-like radiation section being composed of a plurality of units of wave-like current passageways of uniform width of approximately 2 mm from one end to the other, arranged parallel to each other and connected to each other at the crests of the wave-like current passageways so that the combined width of the passageways at the crests is twice the uniform width. The panel heater also has a pair of heat resistant boards between which the metal sheet is sandwiched; and a frame assembly joining together the heat resistant boards.
REFERENCES:
patent: 1117128 (1914-11-01), Camm
patent: 2084556 (1937-06-01), Hamilton
patent: 2458184 (1949-01-01), Marick
patent: 2545805 (1951-03-01), Callender
patent: 2622180 (1952-12-01), Hodges
patent: 2641675 (1953-06-01), Hannahs
patent: 2682596 (1954-06-01), Cox et al.
patent: 2700095 (1955-01-01), Needham
patent: 2971073 (1961-02-01), Eisler
Fukuda Kenji
Maruyama Takeo
Miyoshi Haruki
Nakamura Tatsuji
Sakai Ryouji
Bartis A.
Nippon Kinzoku Co., Ltd.
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