Image forming apparatus having a plurality of removable developi

Details Image forming apparatus having a plurality of removable developi Image forming apparatus having a plurality of removable developi

1990-02-09

1991-11-05

Grimley, A. T.

Photocopying

Contact printing

Light boxes

355245, 355326, G03G 2100

Patent

active

050634100

ABSTRACT:
The present invention discloses an image forming apparatus capable of making color reproductions. A plurality of developing portions are arranged around a photoreceptor which rotates in a predetermined direction. Developing units, which accommodate different kinds of developer, can be attached to the developing portions. Switches detect the attachment of at least one of the developing units. During a copying operation an electrostatic latent image is formed on an electroconductive drum and toner adheres to the electrostatic latent image by selectively operating the developing units.

REFERENCES:
patent: 4579443 (1986-04-01), Abuyama et al.
patent: 4769675 (1988-09-01), Watanabe
patent: 4845524 (1989-07-01), Okamoto et al.
patent: 4890139 (1989-12-01), Takebe

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