Electrical heater with thermistor

Details Electrical heater with thermistor Electrical heater with thermistor

H - Electricity

05

B

H05B 3/26 (2006.01) H05B 3/34 (2006.01)

Patent

CA 2392874

An electrical heater having a plurality electrodes disposed adjacently on a substrate in spaced apart relation and interconnected by a thermistor material, for example a positive temperature coefficient material. The electrodes each have at least one end portion and preferably two opposite end portions coupled to corresponding electrical terminal located at a common termination zone on the substrate. A spacing between adjacent electrodes may vary and adjacent electrodes may include interdigitated portions to vary the heat produced on selected portions of the substrate.

L'invention concerne un appareil électrique chauffant qui comporte plusieurs électrodes disposées de façon adjacente sur un substrat, en position espacée mais avec interconnexion par le biais d'un matériau à thermistance, par exemple du type matériau à coefficient de température positif. Chaque électrode comporte au moins une extrémité et de préférence deux extrémités opposées couplées à une borne électrique correspondante située dans une zone terminale commune sur le substrat. L'espacement entre électrodes adjacentes peut varier, et les électrodes adjacentes peuvent comporter des parties interdigitées qui permettent de faire varier la chaleur produite sur des zones déterminées du substrat.

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