Electrophotographic image stabilization control apparatus

Details Electrophotographic image stabilization control apparatus Electrophotographic image stabilization control apparatus

1993-12-30

1996-07-02

Grimley, Arthur T.

Photocopying

Contact printing

Light boxes

355219, 355246, G03G 2100

Patent

active

055327940

ABSTRACT:
A process control apparatus of electrophotographic apparatus has an optical sensor for optically detecting the density of toner patches formed on a photoreceptor drum. The present apparatus is further provided with a control device for controlling lamps for the copying process, chargers and other elements. A toner patch is formed on the photoreceptor so as to be located between every two toner images for a copying operation. The control device controls the lamps, chargers and other elements in accordance with the result of the toner patches detected by the optical sensor so as to stabilize the copying picture quality. With the arrangement, it is avoided that the job efficiency during the copying operation deteriorates, and the control data obtained from the toner patches is soon used for the toner image formation for the copying operation, thereby ensuring that the process control improves in accuracy.

REFERENCES:
patent: 4684243 (1987-08-01), Minor
patent: 5072258 (1991-12-01), Harada
patent: 5170210 (1992-12-01), Saruwatari
patent: 5253018 (1993-10-01), Takeuchi et al.
patent: 5276483 (1994-01-01), Hasegawa et al.
patent: 5307119 (1994-04-01), Folkins et al.
patent: 5400120 (1995-03-01), Narazaki et al.

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