Electrophotography – Control of electrophotography process – Control of transfer
Reexamination Certificate
2006-09-12
2006-09-12
Ngo, Hoang (Department: 2852)
Electrophotography
Control of electrophotography process
Control of transfer
Reexamination Certificate
active
07106984
ABSTRACT:
To provide an image forming apparatus including: an image forming unit for forming an image on an image bearing member; a transfer unit for electrostatically transferring the image on the image bearing member onto a transfer medium in a transfer portion, the transfer unit including a transfer member that is capable of nipping the transfer medium in a space with the image bearing member and a voltage application unit for applying a voltage to the transfer member; a control unit for performing a detection operation that detects a voltage-current characteristic concerning the transfer member at the time of a non-transfer operation of the transfer unit and determining a transfer voltage at the time of a transfer operation based on a detection result of the detection operation; and a potential changing unit that is capable of changing a potential of a surface of the image bearing member on which the image has been formed by the image forming unit and which does not yet reach the transfer portion, in which the control unit performs the detection operation at the time when the image bearing member surface processed by the potential changing unit passes through the transfer portion.
REFERENCES:
patent: 4386577 (1983-06-01), Hosono et al.
patent: 4387664 (1983-06-01), Hosono et al.
patent: 4421057 (1983-12-01), Hosono et al.
patent: 4458627 (1984-07-01), Hosono et al.
patent: 5038177 (1991-08-01), Parker et al.
patent: 5296903 (1994-03-01), Suzuki et al.
patent: RE34724 (1994-09-01), Hosono et al.
patent: 5926669 (1999-07-01), Sugimoto et al.
patent: 5983044 (1999-11-01), Kodama et al.
patent: 6223004 (2001-04-01), Kodama
patent: 6363228 (2002-03-01), Ream
patent: 2002/0057933 (2002-05-01), Ebihara et al.
patent: 0 831 381 (1998-03-01), None
patent: 54-43038 (1979-04-01), None
patent: 8-202171 (1996-08-01), None
patent: 2000-89530 (2000-03-01), None
patent: 2001-125338 (2001-05-01), None
Patent Abstracts of Japan, Publication No. 8-202171, Aug. 9, 1996.
Patent Abstracts of Japan, Publication No. 2000-89530, Mar. 31, 2000.
LandOfFree
Image forming apparatus 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, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Image forming apparatus will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3564913