MECHANISM OF HOLDING SHEET STACK IN STACKING TRAY FOR AUTOMATIC STAPLING OPERATION

摘要

PROBLEM TO BE SOLVED: To prevent the warping or curling of sheets being stacked in a space of a stacking tray. SOLUTION: In a post-processing device to be used for a printer or a copying machine, the sheets to be stapled are stacked in the stacking tray. As the sheets enter into the stacking tray, one of a plurality of fingers 20 turnably mounted thereon is pushed against the uppermost sheet with the self-weight. A mount 22 mounted with the fingers 20 is movable to keep parallel contact between each finger 20 and the uppermost part of a stack while accommodating an increase of the stack. Pressure is uniformly dispersed from the finger 20 to avoid the curling and warping of the sheets before stapling work. COPYRIGHT: (C)2006,JPO&NCIPI