Electrophotography – Control of electrophotography process – Control of fixing
Reexamination Certificate
2007-11-06
2007-11-06
Gray, David M. (Department: 2852)
Electrophotography
Control of electrophotography process
Control of fixing
C399S328000, C399S067000, C399S330000, C219S216000
Reexamination Certificate
active
10873132
ABSTRACT:
A fixing device including a rotation body and a facing unit configured to face the rotation body. The fixing device also includes a first heat unit configured to heat a nipping area that is formed between the rotation body and the facing unit. A second heat unit is also provided to heat the nipping area. The fixing device further includes a high heat capacity unit configured to transfer the heat from the first heat unit to the nipping area and a low heat capacity unit configured to transfer the heat from the second heat unit to the nipping area. A heat quantity controller is configured to control heat quantity of the first heat unit and the second heat unit. The first heat unit is also configured to heat the nipping area such that the heat quantity per unit area in edge portions of the nipping area is higher than the heat quantity per unit area of the center portion of the nipping area. The second heat unit is also configured to heat the nipping area such that the heat quantity per unit area in the edge portions of the nipping area is lower than the heat quantity per unit area in the center portion of the nipping area.
REFERENCES:
patent: 6333490 (2001-12-01), Higashi et al.
patent: 6463252 (2002-10-01), Omoto et al.
patent: 6753515 (2004-06-01), Miyahara et al.
patent: 2003/0099478 (2003-05-01), Okano
patent: 2003/0190170 (2003-10-01), Hamada et al.
patent: 2004/0028423 (2004-02-01), Hashiguchi et al.
patent: 05-134575 (1993-05-01), None
patent: 2001-249570 (2001-09-01), None
patent: 2003-107937 (2003-04-01), None
patent: 2003-107954 (2003-04-01), None
U.S. Appl. No. 10/441,006, filed May 20, 2003, Yoshikawa.
U.S. Appl. No. 10/873,132, filed Jun. 23, 2004, Yoshikawa.
U.S. Appl. No. 11/354,146, filed Feb. 15, 2006, Yoshikawa.
U.S. Appl. No. 11/376,159, filed Mar. 16, 2006, Yoshikawa.
U.S. Appl. No. 11/521,506, filed Sep. 15, 2006, Yoshikawa.
Gray David M.
Ricoh & Company, Ltd.
Walsh Ryan D.
LandOfFree
Fixing device, fixing method, image forming apparatus, image... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Fixing device, fixing method, image forming apparatus, image..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Fixing device, fixing method, image forming apparatus, image... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3852050