Image forming apparatus

Electrophotography – Document handling – Copy

Reexamination Certificate

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Details

C399S364000, C399S401000, C271S184000, C271S185000

Reexamination Certificate

active

06983122

ABSTRACT:
In an image forming apparatus having a double side printing function, paper on which printing has been completed is prevented from being caught between paper ejection rollers. The apparatus has a first paper ejection roller which is provided at a terminal end section of a paper transport path, a second paper ejection roller which is provided such that it is urged into contact with the first paper ejection roller to switch back printed paper in a double side printing mode in cooperation with the first paper ejection roller, a third paper ejection roller which is provided in a position opposite to the second paper ejection roller such that it is urged into contact with the first paper ejection roller to eject paper on which printing has been completed in the double side printing mode onto an ejected paper tray in cooperation with the first paper ejection roller, and a stopper for preventing the paper ejected onto the ejected paper tray from being caught between the first and second paper ejection rollers and between the first and third paper ejection rollers.

REFERENCES:
patent: 4262895 (1981-04-01), Wenthe, Jr.
patent: 4586812 (1986-05-01), Kaneko et al.
patent: 5014976 (1991-05-01), Muck et al.
patent: 5166738 (1992-11-01), Tani
patent: 5296904 (1994-03-01), Jackson
patent: 6089703 (2000-07-01), Pearson
patent: 6130762 (2000-10-01), Hwang et al.
patent: 6323939 (2001-11-01), Suzuki
patent: 6618577 (2003-09-01), Omura
patent: 6674035 (2004-01-01), Ito
patent: 6782236 (2004-08-01), Sasaki et al.
patent: 0414552 (1991-02-01), None
patent: 58-118666 (1983-07-01), None
patent: 9-012196 (1997-01-01), None
patent: 11193159 (1999-07-01), None
patent: 11-255393 (1999-09-01), None
patent: 2001-294369 (2001-10-01), None
English Language Abstract of JP 58-118666.
English Language Abstract of JP 2001-294369.
English Language Abstract of JP 11-193159.

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