Image forming apparatus

Details Image forming apparatus Image forming apparatus

2008-07-08

2008-07-08

Nguyen, Judy (Department: 2854)

Electrophotography

Document handling

Copy

C399S405000, C400S691000, C400S692000, C400S693000, C271S065000, C271S291000, C271S298000, C271S301000

Reexamination Certificate

active

07398048

ABSTRACT:
An image forming apparatus including: a first driven roller that forms a first nip portion with a driving roller; a second driven roller that forms a second nip portion with the driving roller at a downstream side of the first nip portion; a first transfer passage into which the sheet passed through the first nip portion and sent from the second nip portion is transferred by a forward rotation of the driving roller; a second transfer passage into which the sheet passed through the first nip portion is transferred by the forward rotation of the driving roller without passing through the second nip portion; and a third transfer passage into which the sheet is transferred by a reverse rotation of the driving roller after a rear end of the sheet has passed through the first nip portion by the forward rotation of the driving roller.

REFERENCES:
patent: 6553207 (2003-04-01), Tsusaka et al.
patent: 2002/0039508 (2002-04-01), Tsusaka et al.
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patent: 2002-003048 (2002-01-01), None
patent: 2002-012355 (2002-01-01), None
patent: 2002-104707 (2002-04-01), None
patent: 2002104707 (2002-04-01), None
patent: 2004-075305 (2004-03-01), None
JP Office Action dtd Nov. 13, 2007, JP Appln. 2005-055084.
JP Office Action dtd Apr. 1, 2008, JP Appln. 2005-055084.

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