| 摘要 |
<p>A sheet stacking apparatus (100) includes a sheet stack portion (112) having a plurality of separately elevatable stacker trays (112a, 112b) configured to stack a conveyed sheet and arranged one after the other in a sheet conveying direction. When a number of sheets to be stacked is greater than a number of sheets stackable on a stacker tray, the sheets are conveyed on one stacker tray and then stacked on another stacker tray so that the sheet stacking apparatus (100) is capable of stacking a large number of sheets.
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