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Field of the invention

  • US 5,643,480 A
  • Filed: 11/18/1994
  • Issued: 07/01/1997
  • Est. Priority Date: 05/19/1992
  • Status: Expired due to Term
First Claim
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1. An electric heating device comprising an electric energy source, a resistor heating unit comprising a first material stratum comprising portions of electrically conductive polymer material with PTC properties, said first material stratum having a pair of mutually oppositely arranged major surfaces, in which the polymer material with PTC properties is united with electrode material which electrically connects said electrically conductive polymer material to the energy source, and a regulator unit for regulating current supply to the resistor heating unit, wherein the electric energy source comprises a thin film battery also having a pair of mutually oppositely arranged major surfaces, and wherein said first material stratum is physically connected to said thin film battery such that the energy source and the resistor heating unit form a composed unit in which respectively one each of the major surfaces of said battery and of said first material stratum are turned to face towards one another.

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