Electrophotography – Image formation – Transfer
Reexamination Certificate
2006-11-07
2006-11-07
Brase, Sandra L. (Department: 2852)
Electrophotography
Image formation
Transfer
C399S162000, C399S167000, C347S116000
Reexamination Certificate
active
07133630
ABSTRACT:
A belt device includes a belt as an endless belt that has a scale with a large number of scale marks formed along the whole circumference of the belt. A sensor reads the scale to obtain scale information. A control device provides control to correct a belt speed, based on scale information read. A scale-mark degradation determining unit determines whether the scale mark is degraded. A belt drive controller continuously provides control to correct the belt speed for a degraded portion until the scale-mark degradation determining unit determines that there is no degradation.
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Brase Sandra L.
Oblon & Spivak, McClelland, Maier & Neustadt P.C.
Ricoh & Company, Ltd.
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