Automatic compensation for toner concentration drift due to deve

Details Automatic compensation for toner concentration drift due to deve Automatic compensation for toner concentration drift due to deve

1993-05-17

1995-04-25

Grimley, A. T.

Photocopying

Contact printing

Light boxes

118688, 355214, 355246, G03G 2100

Patent

active

054103886

ABSTRACT:
A method of maintaining consistent large solid area development by developing a large area test patch covering the image area of a photorececptor and detecting the lead edge and trail edge density of the test patch using a densitometer to measure reflectance. If a density differential between lead and trail edge density is detected, electrostatic parameters such as toner concentration, developer bias, and photoreceptor potential are adjusted to maintain constant large solid area development.

REFERENCES:
patent: 4519695 (1985-05-01), Murai et al.
patent: 4980723 (1990-05-01), Buddendeck et al.
patent: 4999673 (1991-03-01), Bares
patent: 5023668 (1991-06-01), Kluy et al.
patent: 5122835 (1992-06-01), Rushing et al.
patent: 5253018 (1993-10-01), Takenchi et al.

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