Image forming system

Details Image forming system Image forming system

2005-03-18

2010-11-16

Tran, Hoan (Department: 2884)

Electrophotography

Image formation

Development

C399S302000, C399S308000

Reissue Patent

active

RE041934

ABSTRACT:
An image forming system is disclosed which can prevent toner stain adhered onto an image bearing member at the time of switching from one developing unit to another from adhering to an image area on an intermediate transfer member and which can thereby prevent the deterioration of image quality. Latent images formed on a photoreceptor drum are developed by developing units in a revolver developing unit, toner images thus formed are primarily transferred in an overlapped state onto an intermediate transfer belt in a primary transfer section, and the thus primarily transferred toner images are together transferred secondarily onto a transfer paper. In this image forming system, a revolving operation of the revolver developing unit is controlled so that an area on the photoreceptor drum with which a developer contained in a Bk developing unit comes into contact upon 22.5° revolution of the revolver developing unit from a home position with consequent movement of the Bk developing unit to a developing position contacts a not-to-be-transferred area on the intermediate transfer belt in the primary transfer section. By so doing, toner stain caused by the Bk developing unit which has moved to the developing position does not exert any influence on the toner images formed on the intermediate transfer belt.

REFERENCES:
patent: 4772916 (1988-09-01), Mochida
patent: 4916547 (1990-04-01), Katsumata et al.
patent: 5599645 (1997-02-01), Tamiya et al.
patent: 5640654 (1997-06-01), Yoshizawa
patent: 5671470 (1997-09-01), Maruta et al.
patent: 5724634 (1998-03-01), Maruta
patent: 5826146 (1998-10-01), Maruta et al.
patent: 5835825 (1998-11-01), Maruta
patent: 5970278 (1999-10-01), Munakata
patent: 6070037 (2000-05-01), Sugihara et al.
patent: 6070047 (2000-05-01), Ichinose et al.
patent: 6160569 (2000-12-01), Fujimori et al.
patent: 6226481 (2001-05-01), Yoneda et al.
patent: 6243550 (2001-06-01), Fuchiwaki et al.
patent: 6256459 (2001-07-01), Hasegawa et al.
patent: 6308019 (2001-10-01), Miyashiro et al.
patent: 6397027 (2002-05-01), Katakabe et al.
patent: 7092660 (2006-08-01), Tanaka et al.
patent: 7197255 (2007-03-01), Yamada
patent: 7200353 (2007-04-01), Kitazawa et al.
patent: 63-23173 (1988-01-01), None
patent: 8-171253 (1996-07-01), None
patent: 2000-172049 (2000-06-01), None
patent: 2000-242099 (2000-09-01), None

Affiliated with

Also associated with

Rating

Image forming system 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 system, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Image forming system will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-4240540