Thermostatic device for fuser

Details Thermostatic device for fuser Thermostatic device for fuser

1990-03-29

1991-05-28

Walberg, Teresa J.

Electric heating

Heating devices

Combined with container, enclosure, or support for material...

217216, 374153, H05B 102

Patent

active

050196928

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.

REFERENCES:
patent: 1889385 (1932-11-01), Schuster
patent: 2947171 (1960-08-01), Peltola
patent: 3469077 (1969-09-01), Peterson
patent: 3470518 (1969-09-01), Schmitt
patent: 3768057 (1973-10-01), Sekira
patent: 4349806 (1982-09-01), Boulanger
patent: 4708495 (1987-11-01), Kitzinger

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