Color image forming apparatus, image forming unit therefor, and

Details Color image forming apparatus, image forming unit therefor, and Color image forming apparatus, image forming unit therefor, and

1998-06-10

2000-12-05

Lee, Susan S.Y.

Electrophotography

Image formation

Photoconductive member

399121, 399223, 399229, 399302, G03G 1500, G03G 1501

Patent

active

061577995

ABSTRACT:
A color image forming apparatus having a plurality of image forming units with each unit having a developing device and a photoconductive drum with a driven coupling device. A conveying device switches the plurality of image forming units by moving them successively between an image forming position and a waiting position. A photoconductive drum driving device removably engages the driven coupling device of the image forming unit that is positioned in the image forming position and having one driving coupling device for coaxially rotating the photoconductive drum of the image forming unit positioned in the image forming position together as one body. The photoconductive drum positioned in the image forming position is in contact with a transfer device wherein a peripheral velocity of either the photoconductive drum or the transfer device during use is higher than the a peripheral velocity of the other.

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