Xerographic process control by adjusting photoreceptor voltages

Details Xerographic process control by adjusting photoreceptor voltages Xerographic process control by adjusting photoreceptor voltages

1994-02-04

1995-05-16

Grimley, A. T.

Photocopying

Contact printing

Light boxes

250325, 355221, 355225, G03G 2100

Patent

active

054165636

ABSTRACT:
An image processing apparatus having a corona device with a charging grid for charging a photoreceptor to voltage levels, a developer for applying toner to the photoreceptor, and a corona control responsive to the signal for charging the photoreceptor by adjusting the photoreceptor voltage levels in relation to discrete photoreceptor segments. The adjustment of voltage levels is done by providing signals from a sensor in response to developing a series of test patches on the photoreceptor, relating the signals from the sensor to a given test patch, associating each of the test patches to a given segment of the photoreceptor, and adjusting the charging grid to a given voltage for each segment of the photoreceptor in response to the signals from the test patches on the photoreceptor.

REFERENCES:
patent: 4348099 (1982-09-01), Fantozzi
patent: 5150135 (1992-09-01), Casey et al.
patent: 5173733 (1992-12-01), Green
patent: 5255055 (1993-10-01), Mahoney

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