Color image forming apparatus with interchangeable charging and

Details Color image forming apparatus with interchangeable charging and Color image forming apparatus with interchangeable charging and

1993-05-12

1994-10-18

Pendegrass, Joan H.

Photocopying

Contact printing

Light boxes

355221, 355274, G03G 1500, G03G 1502, G03G 1516

Patent

active

053573188

ABSTRACT:
In a color image forming machine including a belt-shaped photoreceptor stretched around a plurality of rollers, and a horizontal portion of the photoreceptor being disposed above and in parallel to face a plurality of developing devices, a charging device and a transfer device are disposed to face the photoreceptor at a common position where the photoreceptor is curved around one roller. A cleaning device is disposed to face the photoreceptor at a position where the photoreceptor is curved around the other roller. The charging device is used as a transfer device by changing supplied voltage or is interchangeable with the transfer device by being either slid or rotated between two positions. The photoreceptor, the developing devices and the cleaning device are integrally formed as a cartridge which is detachably mountable to the machine. The photoreceptor is rotated at least five times when a color image is formed by the processes of charging, exposing, transferring and cleaning, and is rotated at least twice when a monochromatic image is formed by the processes.

REFERENCES:
patent: 4901110 (1990-02-01), Tompkins et al.
patent: 5065195 (1991-11-01), Haneda et al.
patent: 5142327 (1992-08-01), Kahle
patent: 5155526 (1992-10-01), Kawabata

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