Color image forming apparatus which accelerates or decelerates t

Details Color image forming apparatus which accelerates or decelerates t Color image forming apparatus which accelerates or decelerates t

1993-01-28

1994-06-14

Grimley, A. T.

Photocopying

Contact printing

Light boxes

118645, 118658, 355326, G03G 1509

Patent

active

053214757

ABSTRACT:
A color image forming apparatus has a plurality of developing units each including a developing sleeve and storing a developer of particular color. The developing sleeve is located to face a photoconductive element or similar image carrier. When the supply of the developer from the developing sleeve to the image carrier begins or ends, a magnet brush formed on the sleeve by the developer is slowly brought into or out of contact with the image carrier. As a result, a load acting on the image carrier due to the brush contacting it is slowly applied and cancelled. This eliminates changes in the moving speed of the image carrier and thereby insures desirable image quality.

REFERENCES:
patent: 4857954 (1989-08-01), Abuyama et al.
patent: 4860053 (1989-08-01), Yamamoto et al.
patent: 4990968 (1991-02-01), Kusuda

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