Controller for roller fixing unit for color electrophotographic

Details Controller for roller fixing unit for color electrophotographic Controller for roller fixing unit for color electrophotographic

1994-06-03

1996-04-02

Royer, William J.

Photocopying

Contact printing

Light boxes

219216, 355208, G03G 1520

Patent

active

055045677

ABSTRACT:
A roller fixing unit for a color electrophotographic apparatus having a fixing roller and a pressing roller rotating in contact with each other, at least one of the rollers acting as a heating roller, as well as a control unit for connecting a power source to the heating device for only a predicted time duration based on a detected surface temperature of the heating roller so that the surface temperature of the heating roller reaches a setting temperature before the time when the top end of a first sheet of print medium having a color image arrives at the fixing roller in a case where the surface temperature of the heating roller in a standby state is lower than the setting temperature. The control unit is set to perform a power source connection for every sheet of print media coming out from an intermediate transfer unit in the color electrophotographic apparatus.

REFERENCES:
patent: 4046990 (1977-09-01), White
patent: 4425494 (1984-01-01), Enomoto et al.
patent: 4671643 (1987-06-01), Shigemura et al.
patent: 4920250 (1990-04-01), Urban
patent: 5041718 (1991-08-01), d'Hondt et al.
patent: 5051780 (1991-09-01), Stelter et al.
patent: 5241349 (1993-08-01), Nagasaka
patent: 5315350 (1994-05-01), Hirobe et al.
patent: 5331384 (1994-07-01), Otsuka

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