Patent ID: 6564019
Filing Date: 2003-05-13
Classification: G03G

Abstract:
An image forming apparatus comprising:a main body having an engine unit for forming image information on a printing paper and a printing paper transferring path formed therein, along which the printing paper is printed out via the engine unit; and a duplex printing unit having a printing paper circulation path formed therein, along which the printing paper is returned back to the engine unit after the printing paper is returned from the engine unit, wherein the duplex printing unit is adapted to be removably mounted on the main body and comprises: a door panel and a cover panel facing each other, being connected for relative turning, and forming the printing paper circulation path; printing paper transferring means provided on a facing side of the door panel and the cover panel for feeding the printing paper; power transmission means for transmitting power to the transferring means from a driving unit of the main body, when the door panel and the cover panel are mounted on the main body; and complementary connection means for complementarily connecting the door panel and the cover panel with the main body, wherein the power transmission means has a driving gear installed on a rotational axis of the printing paper transferring means, the driving gear being engaged with a swing gear connected with the driving unit of the main body, when the door panel and the cover panel are mounted on the main body.