Electrophotography – Control of electrophotography process – Control of transfer
Reexamination Certificate
2006-06-06
2006-06-06
Grimley, Arthur T. (Department: 2852)
Electrophotography
Control of electrophotography process
Control of transfer
C399S397000, C399S302000
Reexamination Certificate
active
07058327
ABSTRACT:
A belt rotates and carries a plurality of images. A scale is provided along at least one side of entire of the belt. A sensor reads the scale on the belt to obtain scale information. An actual speed calculating unit calculates a speed of the belt from the scale information. A control unit provides a control to correct speed of the belt according to the speed calculated. The control unit includes a frequency-correcting unit that performs correction of only a frequency component that is fluctuating of low frequency that is smaller than a predetermined frequency that is developed due to a change in a speed of the belt, from among speed fluctuations of the belt to adjust the speed of the belt to a predetermined target speed.
REFERENCES:
patent: 5146240 (1992-09-01), Hayashi et al.
patent: 5867759 (1999-02-01), Isobe et al.
patent: 6049690 (2000-04-01), Nakayasu et al.
patent: 6195519 (2001-02-01), Isobe et al.
patent: 11-24507 (1999-01-01), None
patent: 2000356936 (2000-12-01), None
Oki Technical Review, Table 1, 1998, http://www.oki.com/en/otr/html
f/otr-161-05-tab-1.html.
Gleitz Ryan
Grimley Arthur T.
Oblon & Spivak, McClelland, Maier & Neustadt P.C.
Ricoh Company Limited
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