Electrophotography – Control of electrophotography process – Of plural processes
Reexamination Certificate
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
Dahrea Michael J.
Elliot Michael W.
Randall Stephen F.
Hutter R.
Tran Hoan H
Xerox Corporation
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