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    • 6. 发明专利
    • Image forming apparatus
    • JP5335484B2
    • 2013-11-06
    • JP2009046266
    • 2009-02-27
    • キヤノン株式会社
    • 規明 松井
    • G03G21/00B65H9/00B65H85/00
    • PROBLEM TO BE SOLVED: To provide an image forming apparatus capable of carrying out a double-sided mode in which lowering of throughput is prevented without making constitution complicated. SOLUTION: A controller 101 decides which mode is carried out, a first double-sided mode or a second double-sided mode, in accordance with length X2 of paper in a conveying direction. In the first double-sided mode, the paper P pulled in a reverse path 239 is stopped at a double-sided reverse position PT403 of the reverse path 239 during first stop time, and then it is conveyed to a registration position PT305 from the reverse path 239 through a paper resupply path 240. In the second double-sided mode, the paper P pulled in the reverse path 239 is ejected from the reverse path 239 and stopped at a paper resupply position PT304 during second stop time, and then it is conveyed to the registration position PT305. COPYRIGHT: (C)2010,JPO&INPIT