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Heater with PTC element an buss system

  • US 6,307,188 B1
  • Filed: 05/25/2000
  • Issued: 10/23/2001
  • Est. Priority Date: 11/09/1998
  • Status: Expired due to Term
First Claim
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1. An electrical heater comprising:

  • first and second busses disposed on a substrate in electrically isolated relation, the first and second busses electrically coupled with generally parallel conducting element portions and having corresponding first and second voltage application portions;

    a thermistor layer electrically interconnecting the generally parallel conducting element portions;

    a summation of electrical paths along the first and second busses from the first and second voltage application portions thereof to adjacent portions along the generally parallel conducting element portions is substantially the same.

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