Patent ID: 7120384

Claim:
In a binding device comprising a paper processing unit that moves a sheet of papers from a paper carriage to a paper finishing unit and moves the sheet of papers finished by the paper finishing unit to a receiving stacker, the paper processing unit comprising: a paper aligning unit including a tray stacking the sheet of papers, a rotational stopper provided at the end of the tray, stopping the sheet of papers stacked on the tray, and a paper clamp gripping the sheet of papers stacked on the tray and moving them to the paper finishing unit when stopping of the rotational stopper is released; and a binding carriage having a lifting unit structured to support the sheet of papers and adjust the angle of the sheet of papers depending on the binding position while the paper clamp moves the sheet of papers to the paper finishing unit and the binding process of the sheet of papers is performed, wherein the angle of the sheet of papers of which binding is finished is adjusted to move them to the position of the receiving stacker.