Planar heating element

Electric heating – Heating devices – With heating unit structure

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Details

219528, 219541, 219543, 219553, 338 22SD, 338212, H05B 338

Patent

active

045188513

ABSTRACT:
A planar heating element having a positive temperature coefficient has a plurality of spaced electric current supply lines constituted by contact bands and a planar support, the electric current supply lines being operatively connected to the planar support, the contact bands and the support including an electrically conductive synthetic resin whose electrical resistance has a positive temperature coefficient.

REFERENCES:
patent: 2503457 (1950-04-01), Speir et al.
patent: 2575987 (1951-11-01), York et al.
patent: 3793716 (1974-02-01), Smith-Johannsen
patent: 4223209 (1980-09-01), Diaz
patent: 4307290 (1981-12-01), Bloore et al.
patent: 4348584 (1982-09-01), Gale et al.
patent: 4421582 (1983-12-01), Horsma

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