Image forming apparatus with controlled timing of contact of...

Details Image forming apparatus with controlled timing of contact of... Image forming apparatus with controlled timing of contact of...

2007-12-18

2007-12-18

Chen, Sophia S. (Department: 2852)

Electrophotography

Internal machine environment

Particle or contaminant control

C399S045000, C399S071000, C399S302000

Reexamination Certificate

active

11266003

ABSTRACT:
A circulating intermediate transfer member contacts an image carrier at a primary transfer position at which a toner image is transferred onto the intermediate transfer member. A secondary transfer member contacts the intermediate transfer member at a secondary transfer position at which the toner image is transferred onto a recording medium. A gate roller pair nips the recording medium therebetween at a nipping position and conveys the recording medium toward the secondary transfer position. A cleaning blade retractably contacts and scrapes off toner remaining on the intermediate transfer member. A conveyance speed of the recording medium at the nipping position is faster than that at the secondary transfer position. The cleaning blade is retracted from the intermediate transfer member until a trailing end of the recording medium passes through the nipping position, when the recording medium has a stiffness greater than a prescribed level.

REFERENCES:
patent: 5652948 (1997-07-01), Sakaguchi et al.
patent: 5828926 (1998-10-01), Iwata et al.
patent: 6823166 (2004-11-01), Nishiwaki
patent: 2003/0118379 (2003-06-01), Hattori
patent: 2005/0100361 (2005-05-01), Tanaka et al.
patent: 09-146438 (1997-06-01), None
patent: 2000-066529 (2000-03-01), None
patent: 2001-147573 (2001-05-01), None
patent: 2003-195712 (2003-07-01), None

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