Uncoupled toner concentration and tribo control

Details Uncoupled toner concentration and tribo control Uncoupled toner concentration and tribo control

1997-09-10

1999-08-10

Beatty, Robert

Electrophotography

Control of electrophotography process

Of plural processes

399 58, G03G 1500

Patent

active

059372273

ABSTRACT:
A method adjusting variations in toner concentration in a printing machine by first determining a pixel count of documents to be imaged. The system then provides two test targets on the imaging surface in the image area, one of the test targets having a relatively low reflectance and the other test target having a medium reflectance. The reflectance value of the test targets is sensed and the difference between the reflectance values is calculated and compared to a reference value to provide an error value. The system then to the error value and the pixel count of documents to be imaged to determine a time period of dispense for a toner dispenser.

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