Optimization of electrophotographic edge development

Details Optimization of electrophotographic edge development Optimization of electrophotographic edge development

1998-05-29

1999-05-04

Grimley, Arthur T.

Electrophotography

Control of electrophotography process

Control of developing

399 46, 399 50, G03G 1508

Patent

active

058995960

ABSTRACT:
The development of the edges of discharged areas on a photoconductor drum in an electrophotographic printing system is controlled by the ratio of the DC component of the developer bias to the magnitude of the difference between the DC component of the developer bias and the DC component of the bias supplied to the photoconductor charge roller. A development system using a developer, a photoconductor charge roller, a high voltage power supply, an optical density sensor, and a controller for controlling the high voltage power supply optimizes the electrophotographic edge development. The optical density sensor is used in a calibration process to determine the value of the DC component of the developer bias necessary to ensure the optical density of developed areas will meet the minimum specified optical density. Optimization of the edge development is accomplished by controlling the high voltage power supply so that the difference between the DC component of developer bias and the DC component of the photoconductor bias is maintained at a substantially constant value as the DC component of the developer bias is adjusted on successive calibrations.

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patent: 5832333 (1998-11-01), Umeda et al.
patent: 5839020 (1998-11-01), Rushing et al.

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