Patent ID: 8668198

Claim:
A sheet processing apparatus comprising: a stacking portion on which a sheet is stacked; a sheet conveying portion which conveys the sheet to the stacking portion; a reference member against which a downstream edge of the sheet in a conveying direction abut for aligning the downstream edge of the sheet; a sheet feeding portion which feeds the sheet stacked on the stacking portion in the conveying direction to cause the downstream edge of the sheet to abut against the reference member; and a controller which controls operations of the sheet conveying portion and the sheet feeding portion, wherein the controller controls the sheet conveying portion and the sheet feeding portion in such a manner that the sheet conveying portion conveys a subsequent sheet so that a downstream portion of the subsequent sheet overlaps an upstream portion of a preceding sheet, then a downstream edge of the preceding sheet reaches the reference member before a downstream edge of the subsequent sheet reaches the sheet feeding portion in a status where there is overlapping between the downstream portion of the subsequent sheet and the upstream portion of the preceding sheet.