Developed mass per unit area controller without using electrosta

Details Developed mass per unit area controller without using electrosta Developed mass per unit area controller without using electrosta

1996-11-26

1998-01-13

Grimley, Arthur T.

Electrophotography

Control of electrophotography process

Of plural processes

399 46, G03G 1500

Patent

active

057089167

ABSTRACT:
An electrostatographic printing machine having an imaging system for projecting and developing images on an imaging member. A process control loop includes a sensor to measure developed mass per unit area on at least three test patches on the imaging member including high area coverage, low area coverage, and mid tone coverage. A comparator responds to the sensor measurements and to developed mass per unit area setpoints to provide error signals. A control unit responds to the error signals to adjust projecting, developing, and imaging member subsystems.

REFERENCES:
patent: 4341461 (1982-07-01), Fantozzi
patent: 4456370 (1984-06-01), Hayes, Jr.
patent: 4563086 (1986-01-01), Knapp et al.
patent: 5119132 (1992-06-01), Butler
patent: 5155530 (1992-10-01), Larson et al.
patent: 5243383 (1993-09-01), Parisi
patent: 5436705 (1995-07-01), Raj
patent: 5576811 (1996-11-01), Kobayashi et al.

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