Layered self-regulating heating article

Details Layered self-regulating heating article Layered self-regulating heating article

1975-08-04

1979-12-04

Askin, Laramie E.

Electric heating

Heating devices

With heating unit structure

174DIG8, 219505, 219510, 219548, 252511, 338 22R, 338212, H05B 312, H05B 338

Patent

active

041773764

ABSTRACT:
A self-regulating heating article comprising a layer of material exhibiting a positive temperature coefficient of resistance (PTC) and said PTC layer having at least partially contiguous therewith at least one layer of constant wattage output material. The article operates such that when connected to an electric power source, the current flows through at least a portion of the thickness of the PTC layer and of the constant wattage layer. In a preferred embodiment, upon heating the article, a change in dimensions as well as activation of an adhesive occurs.

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J. Meyer, "Glass Transition Temperature as a Guide to the Selection of Polymers Suitable for PTC Materials", Polymer Engineering and Science, Nov. 1973, vol. 13, No. 6, pp. 462-468.

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