Thermostatic device for fuser
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United States of America Patent
Stats
-
May 28, 1991
Grant Date -
N/A
app pub date -
Mar 29, 1990
filing date -
Mar 29, 1990
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A thermostatic device particularly usable in sensing the surface tempoerature of a rotatable member in a fuser includes a rotatable roller mountable in rolling engagement with a moving surface. A heat sensor located inside the roller senses temperature variations in the roller. For example, a pin that is spring-urged against the inside surface of the roller, moves a switch between open and closed conditions as the inside diameter of the roller varies with a change in its temperature. Alternatively, a bimetallic disc positioned in engagement with the inside surface of the roller is sensed to open or close a switch in response to the roller temperature reaching a given threshold.
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