Image forming apparatus

Details Image forming apparatus Image forming apparatus

2005-09-28

2008-12-23

Yan, Ren (Department: 2854)

Electrophotography

Document handling

Copy

C399S388000, C399S401000

Reexamination Certificate

active

07469123

ABSTRACT:
An image forming apparatus includes an image forming portion that superposes images on an intermediate transfer member by rotations of the intermediate transfer member to form a color image on the intermediate transfer member, a transfer portion that transfers the image formed on the intermediate transfer member in the image forming portion to a sheet, a fixing portion that fixes the image onto the sheet, and a switchback portion that switches back the sheet so as to return the sheet to the transfer portion for forming the image on a second face of the sheet, after the image has been formed on a first face of the sheet. The sheet is returned through a return path at a return speed equal to or lower than a delivery speed of the sheet in the transfer portion, when the image for the second face of the sheet is the color image.

REFERENCES:
patent: 6450711 (2002-09-01), Conrow
patent: 58-178373 (1983-10-01), None
patent: 09-006206 (1997-01-01), None
patent: 2000-128442 (2000-05-01), None
patent: 2003-050528 (2003-02-01), None

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