Malfunction detecting device in use for the fixing device of an

Details Malfunction detecting device in use for the fixing device of an Malfunction detecting device in use for the fixing device of an

1986-10-24

1988-05-17

Salce, Patrick R.

Photocopying

Including fiber optics

335 14FU, 219216, 219469, 219471, H05B 102, G03G 1500

Patent

active

047454300

ABSTRACT:
A temperature control device uses a thermo-sensitive element to detect the temperature of an imaging system heated fixer device member. A comparator compares the potential generated by the thermo-sensitive element corresponding to the detected temperature with a reference voltage to set the temperature of the heated member to a predetermined level. A signal representing the comparison result is used for controlling the temperature of the heated member. Any abnormality of the heated member is detected on the basis of the output signal from an oscillator producing a signal which changes the reference potential at predetermined periods and from the comparator output signal.

REFERENCES:
patent: 4324486 (1982-04-01), Nishikawa
patent: 4369354 (1983-01-01), Goedecke et al.
patent: 4374321 (1983-02-01), Cunningham, Jr. et al.
patent: 4493984 (1985-01-01), Yamauchi
patent: 4556779 (1985-12-01), Hashimoto et al.

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