Image forming apparatus

Details Image forming apparatus Image forming apparatus

1988-06-28

1989-04-11

Prescott, A. C.

Photocopying

Projection printing and copying cameras

Combined with or convertible to a contact printer

355 14R, 355 14C, 118663, G03G 1500

Patent

active

048210684

ABSTRACT:
An image formation apparatus has an image forming section including an optical system for forming an image corresponding to an image of an original, a potential sensor for measuring a surface potential of a photosensitive drum for forming a latent image thereon, a potential measurement circuit for calculating an average value of the surface potential, and a controller for controlling an exposure of a halogen lamp according to an output for the potential measurement circuit. The apparatus can reproduce optimal images of different types of originals including newspaper articles or the like which generally cause background fogging.

REFERENCES:
patent: 4239374 (1980-12-01), Tatsumi et al.
patent: 4285593 (1981-08-01), Vinatzer
patent: 4335953 (1982-06-01), Tsuchiya et al.
patent: 4361395 (1982-11-01), Washio et al.
patent: 4640603 (1987-02-01), Honma

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