Resistance adjusting type heater
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United States of America Patent
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Apr 13, 1993
Grant Date -
N/A
app pub date -
Feb 28, 1992
filing date -
Mar 5, 1991
priority date (Note) -
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Abstract
A resistance adjusting type heater has a honeycomb structure having a large number of passages, at least two electrodes to enable electrical heating of the honeycomb structure provided on the honeycomb structure, and a resistance adjusting means, a slit, provided between the electrodes. The thicknesses of passage walls at the portions of the honeycomb structure at which electricity flows at a very high density are increased with a conductive material to prevent the abnormal heat generation at the portions of the honeycomb structure.
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