Image forming apparatus having a separate black developer stored

Details Image forming apparatus having a separate black developer stored Image forming apparatus having a separate black developer stored

1991-05-29

1992-11-03

Grimley, A. T.

Photocopying

Contact printing

Light boxes

118645, 355245, G03G 1501

Patent

active

051609690

ABSTRACT:
An image forming apparatus has a plurality of developing containers for developing an electrostatic latent image of a latent image carrier by toners having colors different from each other except for black; a black developing container for color for storing black toner for color and operated when the developed image on the latent image carrier every color is overlapped and transferred onto a transfer material to provide a color image; a black developing container for a monochromatic image for storing black toner for a monochromatic image and operated when the monochromatic image is obtained; and a device for arranging the respective developing containers such that the developing containers are opposite to the latent image carrier. The other image forming apparatuses are also shown.

REFERENCES:
patent: 3970042 (1976-07-01), Rees
patent: 4659211 (1987-04-01), Oka
patent: 4841337 (1989-06-01), Hiratsuka et al.
patent: 4884096 (1989-11-01), Kusuda et al.
patent: 4891672 (1990-01-01), Takagi
patent: 4939548 (1990-07-01), Yamada et al.

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