Patent ID: 6352253
Filing Date: 2002-03-05
Classification: B65H

Abstract:
A discharged sheet stacking apparatus comprising:a sheet stopper; sheet feed-in means disposed at a position spaced apart from said sheet stopper by a distance smaller than a length of the sheet for pinching and feeding a sheet onto a sheet stacking portion on which a plurality of sheets are stacked and for causing a tip end of the sheet to abut against same sheet stopper, wherein said sheet feed-in means continues the feeding operation while pinching a tail end of the sheet even after the tip end of the sheet abuts against said sheet stopper so that, after a loop is formed in the tail end of the sheet, the sheet is discharged onto said sheet stacking portion; sheet stopper retracting means for retracting said sheet stopper from a position where the sheet on said sheet stacking portion abuts against said sheet stopper; an aligning member for aligning the sheet in a sheet width-wise direction; convey means for pinching a sheet bundle from above and below and for conveying the sheet bundle, in which the sheets are aligned in the sheet width-wise direction and the ends of the sheets are aligned by said sheet stopper; and control means for shifting the sheet bundle by said convey means to a stapling position where the sheet bundle is stapled by a stapling mechanism portion, after said sheet stopper is retracted by said sheet stopper retracting means.