Multi-pass type image forming apparatus

Details Multi-pass type image forming apparatus Multi-pass type image forming apparatus

2008-02-28

2011-10-25

Gray, David (Department: 2852)

Electrophotography

Image formation

Development

C399S263000

Reexamination Certificate

active

08045890

ABSTRACT:
An image forming apparatus includes a photosensitive body, and a plurality of developing devices to develop a color image on the photosensitive body. The plurality of developing devices include fixed-position developing devices, of which positions relative to the photosensitive body are fixed, and moveable developing devices, of which positions relative to the photosensitive body are changed. Accordingly, the image forming apparatus can be manufactured compactly, by mounting four developing devices, e.g., for yellow, magenta, cyan and black for the color printing such that three developing devices stand by at the respective development positions and one developing device variably moves to the development position so that the photosensitive body is reduced in diameter when compared to a conventional photosensitive body which opposes four developing devices.

REFERENCES:
patent: 4939547 (1990-07-01), Miyaji et al.
patent: 6064844 (2000-05-01), Isobe et al.
patent: 10-633097 (2006-09-01), None
KR Office Action issued Apr. 20, 2011 in KR Application No. 10-2007-0025593.

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