Sheet stacking apparatus

Details Sheet stacking apparatus Sheet stacking apparatus

2007-04-03

2007-04-03

Bollinger, David H. (Department: 3653)

Sheet-material associating

Associating or disassociating

Sheet associating

C270S058110, C270S058120, C270S058160, C270S058270

Reexamination Certificate

active

11193919

ABSTRACT:
A sheet stacking apparatus which is capable of reliably sandwiching or catching sheets, and also capable of providing control so as to ensure reliable conveyance of succeeding sheets during the catching operation. A stack tray is provided downstream of a processing tray that stacks sheets. A position on the stacking surface of the stack tray at which the leading end of a sheet having its trailing end passing a discharging section, which discharges sheets toward the processing tray, contacts the stacking surface is lower in level than the highest portion of the processing tray. A swinging arm that discharges the sheets stacked on the processing tray to the stack tray is capable of selectively assuming a catching state in which a sheet discharged to the processing tray is caught by the swinging arm, and a non-catching state in which a sheet discharged to the processing tray is not caught by the swinging arm. The swinging arm is controlled to assume the non-catching state when the discharging section starts discharging a sheet, and switch to the catching state before the trailing end of the sheet discharged by the discharging section passes the swinging arm.

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