Heater with PTC element and buss system

Details Heater with PTC element and buss system Heater with PTC element and buss system

1999-03-29

2000-07-04

Walberg, Teresa

Electric heating

Heating devices

With power supply and voltage or current regulation or...

219219, H05B 102, H05B 100

Patent

active

060842172

ABSTRACT:
The heater is formed from a substrate layer, a feeder buss layer, a dielectric layer, a PTF (polymer thick film) conductor or main buss layer, a PTC (positive temperature coefficient) thermistor layer and an external laminated adhesive layer. All of the layers are substantially coextensive. The feeder buss layer, dielectric layer, main buss layer and PTC thermistor layers are preferably screen printed or otherwise selectively applied. The feeder buss layer includes first and second external electrical terminals formed on a single side thereof, and a buss for providing electrical communication from the first terminal to a connector diagonally removed from the second terminal. The connector and the second terminal provide electrical communication to diagonally opposed corners of the PTF conductor or main buss layer thereby providing relatively uniform current path distances through the thermistor layer.

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