Image forming apparatus with removable developing means

Details Image forming apparatus with removable developing means Image forming apparatus with removable developing means

1990-03-26

1992-10-06

Braun, Fred L.

Photocopying

Contact printing

Light boxes

355326, G03G 1501, G03G 1506

Patent

active

051536463

ABSTRACT:
An image forming apparatus is provided with a developing device for developing a latent image formed on the surface of the photosensitive drum. The developing device includes a first developing unit for developing the latent image by use of a first color developing agent and a second developing unit for developing the latent image by use of a second color developing agent. The first and second developing units are selectively driven and devices for inserting/removing the first and second development units are also provided. The image forming apparatus has a selecting device for interrupting an image forming process which is in progress to automatically select an image forming process which uses the second developing unit.

REFERENCES:
patent: 3960445 (1976-06-01), Drawe
patent: 4097139 (1978-06-01), Hauser et al.
patent: 4408862 (1983-10-01), Takano et al.
patent: 4591261 (1986-05-01), Saruwatari et al.
patent: 4619514 (1986-10-01), Ide
patent: 4814823 (1989-03-01), Abuyama et al.
patent: 4956673 (1990-09-01), Abuyama et al.

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