Electrophotography – Image formation – Transfer
Reexamination Certificate
2008-05-20
2008-05-20
Tran, Hoan (Department: 2852)
Electrophotography
Image formation
Transfer
C399S162000, C399S312000, C399S313000
Reexamination Certificate
active
11334630
ABSTRACT:
A mark detecting unit detects a mark that is a reference position of an endless belt. An angular-displacement-error detecting unit detects an angular displacement error of an encoder caused by thickness fluctuation of the endless belt. A first calculating unit calculates a phase and a maximum amplitude to the mark. A second calculating unit calculates correction data according to a distance from the mark on the endless belt. A belt-drive control device controls a belt driving unit by adding the correction data to a preset control target value to stabilize speed fluctuation of the endless belt due to the thickness fluctuation.
REFERENCES:
patent: 6920303 (2005-07-01), Yamanaka et al.
patent: 6941096 (2005-09-01), Matsuda et al.
patent: 6952557 (2005-10-01), Kobayashi
patent: 2003/0223784 (2003-12-01), Yamanaka et al.
patent: 2004/0126129 (2004-07-01), Kobayashi
patent: 2005/0031361 (2005-02-01), Kobayashi
patent: 2005/0036797 (2005-02-01), Miura
patent: 2005/0057209 (2005-03-01), Andoh et al.
patent: 2005/0085945 (2005-04-01), Andoh et al.
patent: 2005/0099153 (2005-05-01), Komatsu et al.
patent: 2006/0088338 (2006-04-01), Matsuda et al.
patent: 2006/0133873 (2006-06-01), Andoh et al.
patent: 2006/0165442 (2006-07-01), Kobayashi et al.
patent: 2006/0184258 (2006-08-01), Matsuda et al.
patent: 2573855 (1996-10-01), None
patent: 11-65208 (1999-03-01), None
patent: 11-102098 (1999-04-01), None
patent: 11-231586 (1999-08-01), None
patent: 11-249380 (1999-09-01), None
patent: 2000-112205 (2000-04-01), None
patent: 2000-310897 (2000-11-01), None
patent: 2004-233383 (2004-08-01), None
patent: 3677506 (2005-05-01), None
patent: 2005-258379 (2005-09-01), None
U.S. Appl. No. 11/867,426, filed Oct. 4, 2007, Kobayshi et al.
U.S. Appl. No. 11/739,391, filed Apr. 24, 2007, Yokokawa et al.
U.S. Appl. No. 11/742,379, filed Apr. 30, 2007, Ehara et al.
U.S. Appl. No. 11/608,008, filed Dec. 7, 2006, Katoh et al.
U.S. Appl. No. 11/558,645, filed Nov. 10, 2006, Takahashi et al.
U.S. Appl. No. 11/335,657, filed Jan. 20, 2006, Okamura et al.
U.S. Appl. No. 11/334,630, filed Jan. 19, 2006, Kobayashi et al.
Andoh Toshiyuki
Imai Ryoji
Kobayashi Kazuhiko
Matsuda Hiromichi
Matsuda Yuji
Oblon & Spivak, McClelland, Maier & Neustadt P.C.
Ricoh Company Limited
Tran Hoan
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