| 摘要 |
An improved sheet stacking scheme is described which is applied to a copying machine, a printer, or the like. Even when printed sheets are sorted and stacked in different stacking positions, sheet alignment is achieved by inhibiting each sheet from being displaced. When sheets are sorted into a first stacking position and a second stacking position, the finisher control unit 200 determines the common area Rc which is shared by the first stacking position and the second stacking position. Then, a finisher control unit 200 sets the positions of the pair of holding members for holding a tail edge in order to perform the tail edge holding motion in the positions F1 and F2 respectively which are located within the common area Rc and symmetrical about the center position Rcc of the common area Rc.
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