Device for preventing overheating of electrophotographic fixing

Details Device for preventing overheating of electrophotographic fixing Device for preventing overheating of electrophotographic fixing

1975-01-22

1976-11-02

Bartis, A.

Electric heating

Heating devices

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

219216, 219388, 219512, 337123, 337386, H05B 102, H01H 6104, H01H 3746

Patent

active

039899268

ABSTRACT:
A thermal fixing device for a xerographic reproducing apparatus includes a thin planar resistance heating element having a low thermal mass and a high coefficient of thermal expansion. The heating element is supported in such manner that one end thereof is free to move linearly under thermal expansion to activate a heater displacement detector comprising a pivotally mounted lever arm having a right angle configuration. One end of the lever arm is received in an opening in the heating element and the other end form a contact of a normally open switch which is adapted to be closed by pivoting of the arm due to expansion of the heating element. Closure of the switch activates a power controller to interrupt the power supply to the heating element.

REFERENCES:
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patent: 1610552 (1926-12-01), James
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patent: 3243579 (1966-03-01), Sussin
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patent: 3283126 (1966-11-01), Velvel
patent: 3525967 (1970-08-01), Stauber
patent: 3569667 (1971-03-01), Ryswick
patent: 3649808 (1972-03-01), Garbe

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