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Flexible electrical heater

  • US 4,197,449 A
  • Filed: 07/05/1978
  • Issued: 04/08/1980
  • Est. Priority Date: 07/05/1978
  • Status: Expired due to Term
First Claim
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1. A unidirectional electrical resistance heater comprising an electrical resistance wire insulated throughout its length by a sheath of moisture impervious electrical insulation, said resistance wire having terminal ends each being connected to an electrical lead wire, a support member formed from an elastomeric material, said electrical resistance wire being partially embedded in a major surface of said support member, said support member being formed of a material having a lower thermal conductivity than the insulation forming the sheath of said electrical resistance wire and provided with a cavity dimensioned to accommodate the interconnected portions of each lead wire and the resistance wire, said electrical resistance heater further comprising a moisture impervious material disposed within each cavity encapsulating said connections.

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