Electrostatic recording apparatus including a controlled develop

Details Electrostatic recording apparatus including a controlled develop Electrostatic recording apparatus including a controlled develop

1986-10-21

1988-07-05

Prescott, A. C.

Photocopying

Projection printing and copying cameras

Combined with or convertible to a contact printer

355 3DD, 355 14R, 355 14C, 118653, 430120, G03G 1508

Patent

active

047558504

ABSTRACT:
An electrostatic recording apparatus including an image former for forming an electrostatic latent image, a device for developing the formed image, and a device for applying a bias voltage to the developer device in accordance with an identification as to whether the original relates to a character image or a half tone image. The bias voltage applying device includes first and second voltage generators for generating different bias voltages, and a selector device for selecting between the first and second generators. The bias voltage applying device is operable, during a developing time, to apply the selected bias voltage to the developer device, and during a non-developing time, to apply thereto a bias voltage different from the bias voltage applied during developing.

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patent: 4372674 (1983-02-01), Yukawa et al.

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