Electrophotographic device with controlled exposed potential

Details Electrophotographic device with controlled exposed potential Electrophotographic device with controlled exposed potential

1988-11-07

1990-03-20

Pendegrass, Joan H.

Photocopying

Contact printing

Light boxes

355219, 355225, 3461601, G03G 1502

Patent

active

049105558

ABSTRACT:
An electrophotographic device has a photosensitive element, an electrifier that forms a uniform electrostatic potential on the photosensitive element, and a light source for irradiating the photosensitive element to obtain an electrostatic latent image that has a reduced potential. A bias potential is applied to the photosensitive element after the latent image is formed, but before it is developed, so that the reduced potential of the latent image can be maintained at a constant level. With constant potentials existing on the photosensitive element, a printed image of high quality is obtained.

REFERENCES:
patent: 3997259 (1976-12-01), Bhaget
patent: 4408871 (1983-10-01), Kojima

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