Image forming apparatus with preconditioning exposure selectivel

Details Image forming apparatus with preconditioning exposure selectivel Image forming apparatus with preconditioning exposure selectivel

1988-04-04

1990-06-12

Pendegrass, Joan H.

Photocopying

Contact printing

Light boxes

355326, G03G 2100

Patent

active

049337211

ABSTRACT:
An image forming apparatus wherein in multi-color mode a multi-color image is formed by repeating a series of uniform charging, image exposing and developing steps to form a plurality of color toner image on a surface of an image retainer, and transferring the color toner image to a transfer material, and wherein in mono-color mode a mono-color image is formed by uniform charging, image exposing and developing in a single step to form a mono-color toner image on the surface of the image retainer, and transferring the mono-color toner image to a transfer material one of the modes being selected. The image retainer is exposed uniformly before the uniform charging step.

REFERENCES:
patent: 4165165 (1979-08-01), Iwami et al.
patent: 4621920 (1986-11-01), Takahashi
patent: 4679929 (1987-07-01), Haneda et al.

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