Electrophotography – Control of electrophotography process – Forming test image
Reexamination Certificate
2011-08-23
2011-08-23
Gray, David (Department: 2852)
Electrophotography
Control of electrophotography process
Forming test image
C399S049000, C399S050000, C399S031000
Reexamination Certificate
active
08005390
ABSTRACT:
A method creates a printing image charge on a photoreceptor printing region of a photoreceptor within a printing apparatus and, simultaneously with the creating of the printing image charge, charges source patches on the photoreceptor outside the photoreceptor printing region. The method then transfers developer material from a donor roll to the photoreceptor. The source patches cause developer material to be removed from areas of the donor roll outside a donor roll printing region to create developer material-depleted regions. The method then reloads the donor roll with developer material using a magnetic brush and evaluates a reload function of the donor roll by characteristics of developer material on target patches with developer material in areas of the non-printing region of the photoreceptor adjacent the target patches. The method then alters the printing image charge to maintain the reload function within a predetermined range.
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Burry Aaron M.
LeStrange Jack
Paul Peter
Ramesh Palghat S.
Sheflin Joseph
Bolduc David
Gibb I.P. Law Firm LLC
Gray David
Xerox Corporation
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