Heating method and assembly utilizing electric heating elements in conjunction with combustion
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United States of America Patent
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Aug 10, 1993
Grant Date -
N/A
app pub date -
May 24, 1991
filing date -
May 24, 1991
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A heater for radiant heating of an object in a heating tunnel, furnace or the like has a layer of ceramic fibers through which a fuel/air mixture is fed for combustion at the surface and use of the heater as a gas burner. Partly embedded in the surface is an electrical-resistance heater which is heated up by the burner action and then can be energized to provide controlled heating of the object when the gas is shut off. A flow of cooling air through the heater can terminate the heating operation and rapidly quench the heater.
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