System for predicting erasure of test patches in a printing...

Details System for predicting erasure of test patches in a printing... System for predicting erasure of test patches in a printing...

2006-09-07

2008-08-26

Tran, Hoan H (Department: 2852)

Electrophotography

Control of electrophotography process

Of plural processes

C399S072000

Reexamination Certificate

active

07418216

ABSTRACT:
In a printing apparatus having a rotatable imaging member, a test patch is created in a predetermined area of the imaging member. A density of the test patch is measured at least a first time, corresponding to a first rotation of the imaging member. Based at least partially on the measuring of the density of the test patch at least a first time, how many rotations in the future the predetermined area of the imaging member will be available for receiving new marking material is predicted.

REFERENCES:
patent: 5504568 (1996-04-01), Saraswat et al.
patent: 6167217 (2000-12-01), Kelsch et al.
patent: 6385408 (2002-05-01), Scheuer
patent: 6404997 (2002-06-01), Grace
patent: 6842590 (2005-01-01), Dalal et al.
patent: 2007-232837 (2007-09-01), None

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