| 摘要 |
An image forming apparatus for duplex printing is provided to enable papers transferred from a discharge path to a return path and papers transferred from a print path to the discharge path to be intercrossed and moved by an apartness part so that a timing for picking up the next paper and a timing when the paper is transferred from the return path to the print path can be almost equally set to single printing during the duplex printing. An image forming apparatus for duplex printing comprises the followings: a transfer unit(106) having at least one transfer unit for transferring a paper along a print path(A); an image forming(130) for forming an image on the paper; a paper discharge unit(150) which has a paper discharge roller(163) for discharging the paper, on which the image is formed, along a discharge path(B) and has a paper discharge backup roller(164); and a duplex print unit(180) having at least one inverse transfer roller(190) for transferring the paper, where the image is formed in one side, through a return path(C) during the duplex printing process.
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