Electrophotography – Control of electrophotography process – Of plural processes
Reexamination Certificate
2006-06-30
2009-06-23
Gray, David M (Department: 2852)
Electrophotography
Control of electrophotography process
Of plural processes
C399S064000, C399S072000, C347S019000
Reexamination Certificate
active
07551866
ABSTRACT:
An image forming method and apparatus capable of implementing accurately and constantly an improved conversion of the amount of toner adhesion over the entire range of the amount of adhesion. The method includes the steps of computing a normalization value as a relative output ratio of the regular reflection output to a background regular reflection component from the surface extracted from the regular reflection light, in which the regular reflection output is obtained by detecting a plurality of gradation toner patterns with a sensor configured to simultaneously detect regular reflection light and diffuse reflection light; obtaining a diffuse reflection output conversion factor by either (1) subtracting the normalization value multiplied by the diffuse reflection output voltage generated by the surface from the diffuse reflection output voltage, or (2) subtracting the normalization value multiplied by a diffuse reflection output voltage increment, which is computed as the difference between the diffuse reflection output voltage and another diffuse reflection output voltage obtained when a light emitting device is turned off, from the diffuse reflection output voltage increment; and subjecting the relation between the diffuse reflection output conversion factor and the amount of adhesion to a polynomial approximation.
REFERENCES:
patent: 4312589 (1982-01-01), Brannan et al.
patent: 5182600 (1993-01-01), Hasegawa et al.
patent: 5198861 (1993-03-01), Hasegawa et al.
patent: 5227842 (1993-07-01), Hayashi et al.
patent: 5237369 (1993-08-01), Maruta et al.
patent: 5270783 (1993-12-01), Bisaiji et al.
patent: 5293198 (1994-03-01), Sawayama et al.
patent: 5327196 (1994-07-01), Kato et al.
patent: 5387965 (1995-02-01), Hasegawa et al.
patent: 5630195 (1997-05-01), Sawayama et al.
patent: 5857131 (1999-01-01), Hasegawa
patent: 5860038 (1999-01-01), Kato et al.
patent: 5970276 (1999-10-01), Kato
patent: 6160569 (2000-12-01), Fujimori et al.
patent: 6496677 (2002-12-01), Fujimori
patent: 6526235 (2003-02-01), Kato
patent: 6594453 (2003-07-01), Kato
patent: 7062185 (2006-06-01), Izumikawa et al.
patent: 2003/0049039 (2003-03-01), Suzuki
patent: 2004/0251435 (2004-12-01), Sawayama et al.
patent: 2004/0253012 (2004-12-01), Ishibashi
patent: 2005/0019048 (2005-01-01), Kato
patent: 2005/0147424 (2005-07-01), Kato et al.
patent: 2005/0207766 (2005-09-01), Hasegawa et al.
patent: 2006/0002724 (2006-01-01), Fujimori et al.
patent: 2007/0019976 (2007-01-01), Watanabe et al.
patent: 04-267274 (1992-09-01), None
patent: 05-249787 (1993-09-01), None
patent: 06-250480 (1994-09-01), None
patent: 10-221902 (1998-08-01), None
patent: 2001-194843 (2001-07-01), None
patent: 2001-324840 (2001-11-01), None
patent: 2002-072612 (2002-03-01), None
U.S. Appl. No. 07/545,508, filed Jun. 29, 1990.
U.S. Appl. No. 07/691,727, filed Apr. 26, 1991.
U.S. Appl. No. 11/856,304, filed Sep. 17, 2007, Oshige, et al.
U.S. Appl. No. 12/112,525, filed Apr. 30, 2008, Koizumi, et al.
U.S. Appl. No. 12/093,753, filed May 15, 2008, Oshige et al.
U.S. Appl. No. 12/094,198, filed May 19, 2008, Kato et al.
Enami Takashi
Fujimori Kohta
Hasegawa Shin
Hirayama Yuushi
Ishibashi Hitoshi
Gray David M
Hyder G. M.
Oblon & Spivak, McClelland, Maier & Neustadt P.C.
Ricoh & Company, Ltd.
LandOfFree
Image forming method and apparatus with improved conversion... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Image forming method and apparatus with improved conversion..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Image forming method and apparatus with improved conversion... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-4096809