Patent ID: 7450881

Claim:
A finishing apparatus which finishes papers ejected from an image forming apparatus comprising: a plurality of paper processing modules; a controller sensing whether the respective paper processing modules are detachably fixed to the image forming apparatus to transmit and receive functional signals of the respective modules to and from the image forming apparatus; and a paper conveyer module detachably fixed in the image forming apparatus, wherein the paper conveyer module includes a paper path switch device guiding the papers to the paper processing modules, and the paper patch switch device is turned on/off by a controller of the paper conveyer module, wherein the paper path switch device includes: a rotational means of which rotational position is controlled by a position sensing means; a pair of shafts connected with the rotational means and spaced apart in parallel from each other to rotate at a predetermined angle along a central shaft; and paper dispensers provided on the circumference of the shafts, each having an elliptical curved part arranged outwardly and the shafts provided with the paper dispensers being arranged in a position where a plurality of paper moving paths are divided.