Color image forming apparatus

Details Color image forming apparatus Color image forming apparatus

1989-09-13

1991-07-30

Prescott, A. C.

Photocopying

Contact printing

Light boxes

355326, 355327, G03G 1501, G03G 1508

Patent

active

050363670

ABSTRACT:
An image-forming apparatus of the electrophotographic type. Color images are made while also enabling formation of a sharp black image formed by utilizing a set of color toner development units, at least one of which is replaceable by a black toner development unit when black toner is required. This results in a simpler, more compact, and effective image-forming apparatus.

REFERENCES:
patent: 4515462 (1985-05-01), Yoneda
patent: 4587536 (1986-05-01), Saito et al.
patent: 4599285 (1986-07-01), Haneda et al.
patent: 4682880 (1987-07-01), Fujii et al.
patent: 4746951 (1988-05-01), Hayakawa et al.
patent: 4754301 (1988-06-01), Kasamura et al.

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