Patent ID: 8678368

Claim:
A post-processing apparatus comprising: a stacking tray on which recording media are stacked; an upward and downward driving unit that drives the stacking tray in upward and downward directions; a binding unit that performs binding on recording media part of whose leading edge in a conveying direction of the recording media toward the stacking tray is positioned on the stacking tray; and an upward and downward driving control unit that controls the upward and downward driving unit such that, when the binding unit performs the binding, descent of the stacking tray is performed before a leading edge of a first sheet among the recording media on which the binding is to be performed reaches a position on the stacking tray, and after the leading edge of the first sheet is positioned on the stacking tray, ascent of the stacking tray is performed before a leading edge of a second sheet among the recording media on which the binding is to be performed reaches a position on the stacking tray.