Image forming apparatus having a plurality of developing unit

Details Image forming apparatus having a plurality of developing unit Image forming apparatus having a plurality of developing unit

1990-11-13

1992-07-21

Moses, R. L.

Photocopying

Contact printing

Light boxes

355327, 118645, G03G 1506

Patent

active

051327333

ABSTRACT:
An image forming apparatus having an image carrier for forming an electrostatic latent image thereon, and a plurality of developing units each facing the image carrier and movable toward and away from the image carrier. A developing roller driving mechanism serves two different functions at the same time, i.e., causing any of the developing units to move between a developing and a non-developing position and driving the developing roller associated with the developing unit. When the developing roller driving mechanism is operated, the developing unit is moved to the developing position in the event of development and to the non-developing position in the event of non-development.

REFERENCES:
patent: 4593991 (1986-06-01), Aoki et al.
patent: 4705394 (1987-11-01), Watanabe
patent: 4728987 (1988-03-01), Diola et al.
patent: 4743938 (1988-05-01), Ohno
patent: 4746951 (1988-05-01), Hayakawa et al.
patent: 4801972 (1989-01-01), Kusumoto et al.
patent: 4891674 (1990-01-01), Seyfried

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