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Electric heating sheet and method of making the same

  • US 6,194,692 B1
  • Filed: 10/02/1998
  • Issued: 02/27/2001
  • Est. Priority Date: 10/02/1998
  • Status: Expired due to Term
First Claim
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1. An electric heating sheet, comprising:

  • a heating element comprising a first cured conductive coating;

    at least a pair of electrodes spaced apart from each other and disposed in electrical contact with the heating element to impart a pattern of current distribution through the heating element when electrical current is supplied to the electrodes;

    one or more current distributing elements of greater conductivity than the first cured conductive coating disposed in electrical contact with the first cured conductive coating of the heating element, the current distributing elements being dimensioned and configured to influence the pattern of current distribution through the heating element;

    a substrate on which the heating element, the electrodes and the current distributing elements are disposed; and

    a first insulating layer substantially covering the heating element, the electrodes and the current distributing elements.

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