Electrophotography – Control of electrophotography process – Of plural processes
Patent
1997-12-18
2000-02-22
Beatty, Robert
Electrophotography
Control of electrophotography process
Of plural processes
399 60, G03G 1500
Patent
active
060290218
ABSTRACT:
An image forming system adopting a dual-component inversion developing system for forming on an image carrier a toner patch image used for detecting an image concentration and controlling an image forming condition such as toner concentration based on the concentration of the toner patch image. The image forming system includes a charge unit for uniformly charging a surface of the image carrier, a developing magnet roll supplied with a developing bias, and a patch forming unit for selecting voltage application conditions to the charge unit and the developing magnet roll so as to reverse the bias potential relationship between the developing magnet roll and a charge potential of the image carrier and forming a first toner patch image at a contrast potential between the charge potential of the image carrier and the bias potential.
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patent: 4519695 (1985-05-01), Murai et al.
patent: 4619522 (1986-10-01), Imai
patent: 4632537 (1986-12-01), Imai
patent: 4870460 (1989-09-01), Harada et al.
patent: 5293198 (1994-03-01), Sawayama et al.
Minami Hideki
Mitsuda Tokio
Nishimura Shigeki
Obuchi Kenji
Okabe Haruhiko
Beatty Robert
Fuji 'Xerox Co., Ltd.
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