Abstract: A sheet conveying device includes a conveying unit that conveys a sheet in a sheet conveying direction; a measuring unit that measures a position of a side edge of the sheet in a measurement area; a shielding unit having an end portion that is projected into the measurement area for shielding the sheet; a first determining unit that determines whether the shielding unit is detectable in the measurement area; and a second determining unit that determines whether the measuring unit has been mounted in the sheet conveying device based on a result obtained in the first determining unit.

Abstract: A sheet processing apparatus includes a sheet stacking member for temporarily receiving a sheet conveyed thereto and stacking the sheet thereon and a conveyance unit for outputting the sheet stacked on the sheet stacking member therefrom, wherein the conveyance unit includes a sheet output face having a predetermined acute angle with respect to a sheet stacking face of the sheet stacking member and configured to output a stack of sheets by touching a back end of the stack of sheets and pushing the stack of sheets.

Abstract: A folding unit folds a sheet. A pressing unit presses a folded side of the folded sheet. A driving unit causes the pressing unit to slide in a direction perpendicular to a sheet conveying direction. A control unit independently sets number of slides at which the pressing unit is to slide on each of a plurality of sections of the folded side depending on a distance of each of the sections from a reference position, and controls the driving unit so as to slide in each of the sections for the number of slides set for that section.

Abstract: A sheet processing system includes a sheet processing device that includes a post-processing unit that performs a predetermined post-processing on a sheet member and a sheet supplying device that supplies the sheet member to the sheet processing device. The post-processing unit has two waiting positions including a first position that is a normal waiting position and a second position that is a position filling items to be used in the post-processing in the post-processing unit. When the post-processing unit moves from the second position to a post-processing position to perform the post-processing in response to a post-processing request, the sheet supplying device sets a supply time for supplying the sheet member to the sheet processing device longer than a time that is required for the sheet processing device to move from the first position to the post-processing position by a predetermined time.

Abstract: A sheet aligning apparatus includes an alignment surface formed in a planar shape and that presses an end of a sheet to move and align the sheet; and a holding unit that holds the end of the sheet at a position contacting the alignment surface in a state that a curled end of the sheet contacts the alignment surface and the sheet is thus pressed.

Abstract: A sheet conveying device includes a first conveying path configured to pass a sheet of a recording medium (e.g., paper) therethrough to a sheet processing device, a second conveying path branched from the first conveying path and configured to temporarily store the paper sheet conveyed therein, a sheet conveying mechanism configured to selectably convey the paper sheet in one of forward and backward directions to the sheet processing device, a guide member mounted at a branch point of the first and second conveying paths and configured to guide the paper sheet when the paper sheet is conveyed in the backward direction by the sheet conveying mechanism to the second conveying path, and a control unit configured to control the sheet conveying mechanism to change a distance between the branch point and the sheet conveying mechanism according to a length of the paper sheet in a forward sheet conveying direction.

Abstract: A sheet processing apparatus includes a first processing unit, a second processing unit, a roller, a guide member, and a conveying unit. The first processing unit applies first processing to a recording medium. The second processing unit applies second processing to the recording medium. The roller has a conveying path to convey the recording medium from the first processing unit to the second processing unit along the outer circumference. The guide member guides the recording medium to the conveying path to lead the recording medium to the second processing unit. The conveying unit applies a conveying force to a stack of recording media at an upstream of the guide member in a recording-medium conveying direction.

Abstract: A sheet aligning device includes a sheet feeder that discharges a sheet in a first direction, a sheet tray on which the sheet is stacked, a sheet jogger that aligns the sheet on the sheet tray in a second direction perpendicular to the first direction, and a sheet detection filler that detects a state of the sheet on the sheet tray. The sheet detection filler detects a position of a topmost sheet in the stack of sheets on the sheet tray and determines an alignment position from where the sheet jogger is to begin alignment of the sheets.

Abstract: A sheet post-processing apparatus includes a sheet stacking unit, an aligning unit, a moving member, a discharging member, and a discharging motor. The discharging motor drives the discharging member for discharging a pile of sheets in an operation pattern that is selected, depending on a predetermined condition, from among a plurality of operation patterns.

Abstract: A sheet stacking unit that stacks sheets thereon is movable up and down. A lifting unit moves the sheet stacking unit up and down. A driving unit drives the lifting unit. A control unit controls a driving speed of the driving unit. A position detecting unit detects a position of the sheet stacking unit in an up-and-down direction. The control unit controls the driving speed according to the position of the sheet stacking unit detected by the position detecting unit.

Abstract: In a sheet creaser, a sheet set is pushed between a pair of folding rollers to fold the sheet set. Then, a re-pressing roller re-presses the sheet set, which has been folded by the folding rollers, by rolling along the crease. Pressure applied on the sheet set by the folding rollers is released when the re-pressing roller re-presses the sheet set.

Abstract: A sheet conveying device includes a conveying unit that conveys a sheet in a sheet conveying direction; a measuring unit that measures a position of a side edge of the sheet in a measurement area; a shielding unit having an end portion that is projected into the measurement area for shielding the sheet; a first determining unit that determines whether the shielding unit is detectable in the measurement area; and a second determining unit that determines whether the measuring unit has been mounted in the sheet conveying device based on a result obtained in the first determining unit.

Abstract: A pressing unit includes a pressure roller that slides on the folded side while rotating, an elastic biasing unit that presses the pressure roller in a thickness direction of the stack of sheets, and a driving unit that slides the pressure roller in a direction substantially perpendicular to a conveying direction of the stack of sheets. A lifting unit, when the pressure roller slides to a first position, temporarily lifts up the pressure roller, and when lifted-up pressure roller slides to a second position, lifts the lifted-up pressure roller down onto the folded side.

Abstract: A sheet alignment device, that is included in a sheet finishing apparatus integrally mounted with an image forming apparatus to an image forming system or connected to the image forming apparatus, includes an accommodating unit configured to temporarily accommodate a paper sheet and a paper sheet stack including the paper sheet therein, and a sheet alignment unit configured to align the sheet stack including the paper sheet in a direction perpendicular to a sheet travel direction. The sheet alignment unit has a first alignment member configured to move between a sheet receiving position and a sheet alignment position along the direction perpendicular to the sheet travel direction so as to push the sheet stack and a second alignment member configured to move to a fixed position and remain stationary thereat so as to stop the sheet stack pushed by the first alignment member.

Abstract: In a sheet creaser, when a sheet is conveyed to a folding unit by a conveyer unit, the folding unit folds the sheet and a pressing unit presses the folded sheet by sliding in a direction substantially perpendicular to a sheet conveying direction. A switching unit switches the conveyer unit between a first position to convey the sheet and a second position unable to convey the sheet. A driving unit drives both the switching unit and the pressing unit.

Abstract: A folding unit folds a sheet. A pressing unit presses a folded side of the folded sheet. A driving unit causes the pressing unit to slide in a direction perpendicular to a sheet conveying direction. A control unit independently sets number of slides at which the pressing unit is to slide on each of a plurality of sections of the folded side depending on a distance of each of the sections from a reference position, and controls the driving unit so as to slide in each of the sections for the number of slides set for that section.

Abstract: A pressing unit presses vicinity of a trailing edge of a stack of sheets stacked in a tray. An aligning unit aligns the stack of sheets stacked in the tray. A stapling unit binds the stack of sheets aligned by the aligning unit. A discharging unit discharges the stack of sheets bound by the stapling unit. A control unit controls the pressing unit to keep a constant distance from a surface of a top sheet of the stack of sheets when the discharging unit discharging the stack of sheets.

Abstract: A sheet aligning device includes a sheet feeder that discharges a sheet in a first direction, a sheet tray on which the sheet is stacked, a sheet jogger that aligns the sheet on the sheet tray in a second direction perpendicular to the first direction, and a sheet detection filler that detects a state of the sheet on the sheet tray. The sheet detection filler detects a position of a topmost sheet in the stack of sheets on the sheet tray and determines an alignment position from where the sheet jogger is to begin alignment of the sheets.

Abstract: A processing unit performs a predetermined processing on a sheet in a process of carrying the sheet. A home-position detecting unit detects a home position of a moving member of the processing unit by detecting a part of the moving member using a detecting unit. The home-position detecting unit sets in advance a detection range for recognizing the home position, and when a part to detect the home position is detected in a state in which the moving member is stopped, sets a detection position as the home position by assuming that the detection position is in the detection range without moving the moving member once out of a detection range of the detecting unit.

Abstract: A sheet processing device includes a sheet aligning unit that aligns a sheet recording medium. The sheet aligning unit is configured to be pulled out from a main body of the sheet processing device, and includes a sheet conveying member for conveying the sheet recording medium.