Image forming apparatus

Details Image forming apparatus Image forming apparatus

1990-08-27

1992-12-15

Grimley, A. T.

Photocopying

Contact printing

Light boxes

118645, 355245, 355326, G03G 2100

Patent

active

051721651

ABSTRACT:
An image forming apparatus includes an image bearing member; a system for forming a latent image on the image bearing member; a developing device for developing the latent image formed on the image bearing member, the developing device including plural developing units, and each of the developing units including a developer carrying member movable to carry thereon the developer to supply the developer to the image bearing member and a developer scatter preventing member at a position adjacent the developer carrying member; a driver for moving a selected one of the developing units to a predetermined position faced to the image carrying member; a device for positioning the selected developing unit to an operating position for a developing operation; a member which is contacted to or close to the scatter preventing member when the selected developing unit is placed at the operating position.

REFERENCES:
patent: 3930850 (1976-01-01), Matsumoto et al.
patent: 4316396 (1982-11-01), Uchida
patent: 4398817 (1983-08-01), Nishimura et al.
patent: 4800411 (1989-01-01), Tanaka et al.
patent: 4982242 (1991-01-01), Ishii et al.

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