Multi-color image formation apparatus and method for preventing

Details Multi-color image formation apparatus and method for preventing Multi-color image formation apparatus and method for preventing

1993-07-16

1996-03-19

Smith, Matthew S.

Photocopying

Contact printing

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355327, 430 42, G03G 1501

Patent

active

055007279

ABSTRACT:
A multi-color image formation apparatus and method of its use prevent deterioration of stability due to a recharging process in one cycle of multi-color image formation and also effectively avoid color mixing in the toner image previously formed. The multi-color image formation apparatus includes an electrostatic latent image formation member, a first electrostatic latent image formation device for forming a first electrostatic latent image on the electrostatic latent image formation member, a first developer for developing the first electrostatic latent image with a first toner, a second electrostatic latent image formation device for forming a second electrostatic latent image on the electrostatic latent image formation member, and a second developer for developing the second electrostatic latent image with a second toner. The second electrostatic latent image formation device reduces the absolute value of the potential of an image portion of the electrostatic latent image and also reduces the absolute value of the potential of the common area of background portions of the first and second electrostatic latent images.

REFERENCES:
patent: 4791452 (1988-12-01), Kasai et al.
patent: 4927724 (1990-05-01), Yamamoto et al.
patent: 4959695 (1990-09-01), Nishimura et al.
patent: 5097296 (1992-03-01), Goto et al.
patent: 5365325 (1994-11-01), Kumasaka et al.

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