Electrophotography – Diagnostics – Fixing
Reexamination Certificate
2008-05-28
2011-10-11
Gray, David (Department: 2852)
Electrophotography
Diagnostics
Fixing
C399S067000, C399S069000, C399S122000, C399S320000
Reexamination Certificate
active
08036545
ABSTRACT:
An image forming apparatus which is capable of detecting occurrence of an abnormality that a fixing member which is actually in an unpressurized state is detected to be in a pressurized state, and supply of electric power to a heating member is continued. A fixing device includes a fixing belt and a pressure roller. The fixing belt and the pressure roller are pressed against each other such that a nip is formed therebetween, for nipping and conveying a transfer material through the nip while heating and pressing the same. A pressurizing unit selectively switches between a pressurizing state and an unpressurizing state. When the pressurizing unit is in the pressurized state, a heater heats the fixing belt. The heating of the fixing belt is stopped based on a temperature detected by a thermistor after a lapse of a predetermined time period from start of the heating.
REFERENCES:
patent: 5111249 (1992-05-01), Owada
patent: 5737664 (1998-04-01), Fukuda et al.
patent: 7043167 (2006-05-01), Ichikawa et al.
patent: 7212754 (2007-05-01), Fujiwara
patent: 7536145 (2009-05-01), Tomine et al.
patent: 7542692 (2009-06-01), Yamamoto et al.
patent: 7778564 (2010-08-01), Sone et al.
patent: 2002/0127022 (2002-09-01), Tanaka
patent: 2005/0013626 (2005-01-01), Satoh et al.
patent: 2005/0063724 (2005-03-01), Kodama
patent: 2005/0254845 (2005-11-01), Taki et al.
patent: 2006/0280520 (2006-12-01), Inada
patent: 2007/0019977 (2007-01-01), Sawamura et al.
patent: 2007/0134009 (2007-06-01), Choi et al.
patent: 2007/0217839 (2007-09-01), Moteki et al.
patent: 2008/0101805 (2008-05-01), Hyun
patent: 2008/0187333 (2008-08-01), Hwang
patent: 2008/0292345 (2008-11-01), Kang
patent: 2009/0180792 (2009-07-01), Hayamizu
patent: 11-15303 (1999-01-01), None
patent: 2005-321511 (2005-11-01), None
Canon Kabushiki Kaisha
Gray David
Gray Francis
Rossi Kimms & McDowell LLP
LandOfFree
Image forming apparatus, method of controlling fixing... 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 apparatus, method of controlling fixing..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Image forming apparatus, method of controlling fixing... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-4279678