Recording apparatus

Details Recording apparatus Recording apparatus

1987-10-08

1989-06-06

Grimley, Arthur T.

Photocopying

Contact printing

Light boxes

355219, 430 31, G03G 1500, H04N 100

Patent

active

048376000

ABSTRACT:
A recording apparatus having a photosensitive body, a charger for charging the photosensitive body, an exposure unit for forming a latent image on the photosensitive body charged by the charger, and a developing unit for developing the latent image into a visible image on the photosensitive body. The recording apparatus also includes a first surface potential sensor for measuring the surface potential of the photosensitive body before the latent image has been developed by the developing unit, a second surface potential sensor for measuring the surface potential of the photosensitive body after the latent image has been developed by the developing unit, a computer for computing the surface potential of the photosensitive body at a position between the first and second surface potential sensors to estimate the surface potential at the position of the developing unit, and a controller for controlling the charger so that the estimated surface potential becomes a determined level.

REFERENCES:
patent: 4026643 (1977-05-01), Bergman
patent: 4408871 (1983-10-01), Kojima
patent: 4611901 (1986-09-01), Kohyama et al.
patent: 4693593 (1987-09-01), Gerger
Scharfe, Electrophotography Principles and Optimization, Xerox Corporation, Research Studies, Press Ltd., N.Y., Chapter 4, pp. 97-105.

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