Adaptable layered heater system

H - Electricity – 05 – B

Patent

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H05B 3/20 (2006.01) B29C 45/72 (2006.01) H05B 3/46 (2006.01)

Patent

CA 2580163

A layered heater is provided that comprises at least one resistive layer defining a circuit configuration, the circuit configuration comprising at least one resistive trace oriented relative to a heating target and comprising a material having temperature coefficient characteristics such that the resistive trace provides power commensurate with demands of the heating target. In one form, resistive traces of the resistive layer are a PTC material having a relatively high TCR and are oriented approximately perpendicular to a primary heating direction. In another form, resistive traces of the resistive layer are an NTC material having a relatively high BETA coefficient and are oriented approximately parallel to a primary heating direction.

L'invention concerne un système de chauffage en couches qui comprend au moins une couche résistante formant une configuration de circuit qui présente au moins une trace résistante orientée par rapport à une cible chauffante et renferme une matière à caractéristiques de coefficient thermique telles, que la trace résistante engendre un courant proportionnel aux demandes de la cible chauffante. Dans un mode de réalisation, des traces résistantes de la couche résistante constituent une matière CTP possédant un coefficient de température de résistance relativement élevé et elles sont orientées approximativement perpendiculairement à une direction de chauffage primaire. Dans un autre mode de réalisation, des traces résistantes de la couche résistante constituent une matière CTN possédant un coefficient BETA relativement élevé et elles sont orientées approximativement parallèlement à une direction de chauffage primaire.

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