Process control for electrophotographic recording

Details Process control for electrophotographic recording Process control for electrophotographic recording

1997-12-29

2000-09-19

Le, N.

Incremental printing of symbolic information

Electric marking apparatus or processes

Electrostatic

347900, 399 50, B41J 2385

Patent

active

06121986&

ABSTRACT:
An electrostatographic recording apparatus and method includes a primary charger establishing a uniform primary electrostatic voltage level on an image recording member. A recorder imagewise modulates the electrostatic charge on the image recording member to form a latent electrostatic image. A development station develops the electrostatic image with toner. A controller controls the primary charger by periodically adjusting a signal to the primary charger in response to a signal related to charger efficiency. The charger efficiency is determined as the ratio of the charger's grid voltage to a voltage level established on the recording member. To calculate changes to the grid, voltage control patches are printed on the member and the densities used to determine changes to setpoint values for the charger.

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