Apparatus for stacking and storing sheets

摘要

A staple sorter comprising a large-capacity non-sort tray. Sheets are stacked one by one on a plurality of bins so as to make collated sets of sheets (sort mode), and each set is stapled by a staple unit. A sheet conveyer gate has rollers and is capable of moving vertically. The sheet conveyer gate takes a stapled stack of sheets out of a bin with the rollers when lowered, and ejects the stack onto the non-sort tray after elevated. When ejecting, the gate is elevated to a position which is higher than the uppermost surface of the sheets stacked on the non-sort tray.