Image forming apparatus comprising a move member which moves...

Details Image forming apparatus comprising a move member which moves... Image forming apparatus comprising a move member which moves...

2008-01-03

2009-08-25

Lee, Susan S (Department: 2852)

Electrophotography

Image formation

Transfer

C399S299000

Reexamination Certificate

active

07580663

ABSTRACT:
A transfer roller drive unit sets an all-separate mode after setting a full-color mode, sets a monochrome mode after setting the all-separate mode, and sets a full-color mode after setting the monochrome mode. Namely, a transfer belt25comes into contact with the photosensitive drum24first, and then the photosensitive drums21, 22and23. This pattern is repeated. The transfer belt25does not come into contact with the photosensitive drums21, 22, 23and24at a time.

REFERENCES:
patent: 6556802 (2003-04-01), Sasamoto et al.
patent: 7130552 (2006-10-01), Nishida et al.
patent: 7333759 (2008-02-01), Kaiho
patent: 2007/0059054 (2007-03-01), Furukawa
patent: 2007/0196141 (2007-08-01), Kitagawa et al.
patent: 10-181927 (1998-07-01), None

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