Linear heater

Details Linear heater Linear heater

1993-03-22

1994-06-14

Evans, Geoffrey S.

Electric heating

Heating devices

With heating unit structure

346 76PH, H05B 316

Patent

active

053212347

ABSTRACT:
A linear heater comprises an insulating substrate, at least one resistor strip formed on the substrate, and a heat-resistant protective coating formed on the substrate for covering the resistor strip. The resistor strip has a double-layer structure which includes a first resistor layer formed directly on the substrate, and a second resistor layer formed on the first resistor layer. The first resistor layer has a pair of upwardly bulging longitudinal margins, whereas the second resistor layer is formed between the pair of upwardly bulging longitudinal margins of the first resistor layer to provide a substantially flat surface.

REFERENCES:
patent: 4204107 (1980-05-01), Ohkubo et al.
patent: 4413170 (1983-11-01), Val et al.
patent: 4691210 (1987-09-01), Nishiguchi et al.
patent: 5068517 (1991-11-01), Tsuyuki et al.

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