Image forming apparatus

Details Image forming apparatus Image forming apparatus

1998-07-06

1999-07-27

Moses, Richard

Electrophotography

Control of electrophotography process

Control of transfer

399299, 399314, G03G 1500

Patent

active

059305568

ABSTRACT:
The image forming apparatus has a first through a fourth image forming stations which form images in respective colors. Under theses image forming stations, there is provided the transfer belt to convey a paper. Inside the transfer belt, transfer rollers are arranged to apply prescribed transfer bias voltage to the image carriers of the image forming stations. When, for instance, a monochromatic image is formed at the fourth image forming station, 500V transfer bias voltage is applied to the transfer rollers of the first through third image forming stations and 1,00V transfer bias voltage is applied to the transfer roller of the fourth image forming station. Thus, it is possible to prevent undesirable charge-up to the paper and form monochromatic image of good quality.

REFERENCES:
patent: 5041877 (1991-08-01), Matsumoto
patent: 5363178 (1994-11-01), Matsumoto
patent: 5469248 (1995-11-01), Fujiwaka et al.
patent: 5600421 (1997-02-01), Takekoshi et al.
patent: 5602633 (1997-02-01), Yoshida et al.
patent: 5740493 (1998-04-01), Otaki et al.
patent: 5758038 (1998-05-01), Itoh et al.
patent: 5794110 (1998-08-01), Kasai et al.
patent: 5797070 (1998-08-01), Waki et al.

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