Electric heating – Heating devices – With heating unit structure
Patent
1984-08-31
1985-09-17
Mayewsky, Volodymyr Y.
Electric heating
Heating devices
With heating unit structure
219528, 219541, 219544, 219549, 338212, 338309, 338328, H05B 316
Patent
active
045422850
ABSTRACT:
A sheet heater including a substrate, a semi-conductor pattern (typically of colloidal graphite) having a pair of parallel, spaced-apart, longitudinally-extending stripes and a central portion extending between and electrically connected to the stripes, and a pair of parallel, spaced-apart, longitudinally-extending conductors one of which overlies and engages each of the stripes. Each conductor is significantly wider than the underlying stripe of the semi-conductor pattern, and includes a longitudinally extending strip portions along the inner and outer edges of the conductor, and a plurality of longitudinally-spaced openings located therebetween. The strip portion at the inner edge of the conductor overlies and engages a respective stripe; and a sealing layer of insulating material overlies the respective conductor and is sealed to the substrate along the inner and outer edges of the conductor and through the longitudinally spaced openings.
REFERENCES:
patent: 2473183 (1949-06-01), Watson
patent: 3749886 (1973-07-01), Michaelson
patent: 4023008 (1977-05-01), Durussel
patent: 4388522 (1983-06-01), Boaz
patent: 4450346 (1984-05-01), Boaz
patent: 4453669 (1984-06-01), Karla et al.
patent: 4485297 (1984-11-01), Grise et al.
Flexwatt Corporation
Mayewsky Volodymyr Y.
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