Control apparatus of heat fixing unit of image recording apparat

Details Control apparatus of heat fixing unit of image recording apparat Control apparatus of heat fixing unit of image recording apparat

1996-02-23

1999-02-16

Rutledge, D.

Photocopying

Projection printing and copying cameras

Illumination systems or details

216216, 216490, G03G 1520, G03G 1500

Patent

active

058726209

ABSTRACT:
In order to reduce a temperature change of a fixing unit and to prevent a reduction of the life of a switching device for controlling the current supply of a heater of the fixing unit and to reduce flickering noises, an on/off control of the heater is executed in every predetermined period and the order of ON and OFF states of the heater is changed every period when the fixing unit is heated.

REFERENCES:
patent: 5140132 (1992-08-01), Shiokawa
patent: 5220389 (1993-06-01), Kishimoto et al.
patent: 5502546 (1996-03-01), Muto

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