Image forming apparatus having a system for preventing overheati

Details Image forming apparatus having a system for preventing overheati Image forming apparatus having a system for preventing overheati

1989-11-13

1991-07-16

Moses, R. L.

Photocopying

Contact printing

Light boxes

219216, G03G 1520

Patent

active

050328743

ABSTRACT:
An image forming apparatus includes a pair of fixing rollers having a heater, a heater controller for outputting a turn-on/off signal to the heater, a sensor for detecting a turn-on/off state of the heater, a generator for generating a signal during an image forming operation and a prohibiting controller for cutting off a power supply to the heater when the signals from the heater controller, the sensor and the generator are simultaneously supplied.

REFERENCES:
patent: 3936658 (1976-02-01), Traister et al.
patent: 4113375 (1978-09-01), Murata et al.
patent: 4385826 (1983-05-01), Itoh
patent: 4538902 (1985-09-01), Inuzuka et al.
patent: 4551007 (1985-11-01), Elter
patent: 4556779 (1985-12-01), Hashimoto et al.
patent: 4603245 (1986-07-01), Yagasaki
patent: 4618247 (1986-10-01), Tsuji
patent: 4642448 (1987-02-01), Shigemura et al.
patent: 4684784 (1987-08-01), Tamary

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