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US 8,668,198 B2Granted
Sheet processing apparatus and image forming apparatus
AssigneeCanon Kabushiki Kaisha
InventorsHiroharu Tsuji, Masatoshi Yoshida, Tomooku Koyama, Junichi Sekiyama
Life of this patent
Estimating the term…
Abstract
A controller controls operations of a sheet conveying portion and a sheet feeding portion in such a manner that an operation for feeding a preceding sheet by the sheet feeding portion is started after a downstream portion of a subsequent sheet conveyed by the sheet conveying portion is overlapped an upstream portion of the preceding sheet stacked on the stacking portion, and the downstream edge of the preceding sheet is caused to abut against the reference member by the sheet feeding portion in a state where the upstream portion of the preceding sheet and the downstream portion of the subsequent sheet are maintained in an overlapped state.
Claims24
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.
4 more elements
An image forming apparatus comprising:
- an image forming portion which forms an image on a sheet;
- a stacking portion on which a sheet having an image formed thereon by the image forming portion 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 the 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.
5 more elements
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 abuts 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;
- an aligning portion which presses a side edge in a width direction of the sheet stacked on the stacking portion to align the side edge in the width direction of the sheet, the width direction being perpendicular to the conveying direction;
- 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,
- wherein the aligning portion aligns the preceding sheet before the conveying direction downstream edge of the subsequent sheet reaches an operation area of the aligning portion and retracts to an outside of a sheet conveying area.
6 more elements
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 abuts 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,
- wherein the reference member is provided to be movable to a position projecting from a stacking surface of the stacking portion serving as an alignment reference, and to a position which does not interfere with discharging of the sheet from the stacking portion.
5 more elements
Dependencies are inferred from the claim text.