Abstract: A substrate finishing system includes a sheet input that feeds sheets to a compiler for compiling. The sheets may be stapled at the compiler. A trail edge support of the compiler is movable from a first position to a second position. The compiler is configured to drop a sheet or set of sheets to build compiled set stacks at the first and second positions on a stacking tray positioned beneath the compiler.

Abstract: A sheet processing apparatus of the present invention includes a post-processing unit provided inside a housing and configured to perform post-processing on sheets discharged from an image forming apparatus, a sheet discharge unit configured to guide sheets having undergone post-processing to a discharge port, a paper discharge tray configured to accommodate sheets discharged from the discharge port and allowed to ascend and descend within a specific height range lower than the discharge port, and a sheet member disposed directly below the discharge port and configured to move along a wall surface of the housing in association with ascending and descending of the paper discharge tray and receive rear ends of the sheets accommodated in the paper discharge tray, a width of a receiving portion thereof in a height direction varying with a quantity of the sheets accommodated in the paper discharge tray.

Abstract: A recording apparatus includes a tray in which a recording material is to be set, the tray being reciprocated between a first position where the tray is exposed to allow the recording material to be set therein and a second position shifted from the first position in a first direction, where the tray is stored; a transporting mechanism that applies transportation force for reciprocating the tray; and a transportation-force transmitting member that is connected to the tray to mediate transmission of the transportation force to the tray and is capable of increasing or decreasing a space occupied by the transportation-force transmitting member in the direction of reciprocation.

Abstract: A sheet processing apparatus capable of improving sheet processing performance and productivity is provided. While sheets are conveyed in a piled state toward a rear-end stopper, displacement is produced between the sheets by a pair of discharge rollers. Even if adhesion occurs between the sheets during conveyance thereof, the adhesion between the sheets can be removed before the sheets come into contact with the rear-end stopper.

Abstract: A sheet processing device provided with a stacking unit configured to stack thereon one or more conveyed sheets, a staple unit configured to staple a bundle of sheets stacked on the stacking unit, a moving unit configured to move the staple unit to a staple position, and a projecting and retrieving unit configured to project and retrieve the stacking unit in a space overlapped with a motion space for the staple unit to move therein.

Abstract: In a sheet processing apparatus that, for example, sorts or staples sheets after image formation, when preceding finishing is not completed on a processing tray, a third sheet fed anew into awaiting tray of a sheet placing member configuring a sheet waiting unit, which temporarily puts a sheet conveyed thereto on standby, is stacked to be shifted such that leading ends of second and third sheets are located further on a conveying direction upstream side than a leading end of a first sheet. Consequently, longitudinal alignment in the processing tray after that is surely performed.

Abstract: A sheet stacking apparatus, including: a stacking section which stacks sheets; a sorting section which changes an ejecting position of the sheet in the stacking device to sort the sheets; an aligning section which aligns the sheet sorted by the sorting section and ejected onto the stacking section; a shifting section which shifts the aligning section based on the ejecting position changed by the sorting section in the stacking section; and a control section which controls at least the aligning section and the shifting section; wherein when the number of sheets as a sheet unit to be sorted by the sorting section is plural, the control section controls the aligning section to align the sheets as the sheet unit, and when the number of sheets is singular, the control section controls at least the aligning section and shifting section not to align the single sheet in the sheet unit.

Abstract: According to an embodiment, a sheet processing apparatus includes: a processing tray on which a sheet conveyed from an image forming apparatus is placed; a lateral alignment unit which has a pair of movable alignment boards, holds and the sheet on the processing tray between the pair of alignment boards, and aligns the sheet; a stapler which staples the sheet placed on the processing tray; a sheet discharge unit which discharges the stapled sheet from the processing tray to a discharge port; and a control unit which control so that the sheet is stapled after an operation of holding the sheet between the pair of alignment boards and then opening the alignment boards is performed plural times, when the sheet is inserted to the stapler from the discharge port and manually stapled.

Abstract: A sheet processing apparatus according to the invention includes a conveying portion that conveys a sheet; and an abutment member against which an end of the sheet in a conveying direction abuts, the sheet being conveyed by the conveying portion. Herein, the abutment member is movable so as to change a distance between the abutment member and the conveying portion adjacent to the abutment member based on sheet information about the stiffness of a sheet, when an end of the sheet in the conveying direction is abutted against the abutment member.

Abstract: To provide a sheet post-processing apparatus enabling a sheet to be aligned in a predetermined collection position irrespective of the basis weight of the sheet and image formation surface in dropping and collecting the sheet onto a tray from a sheet discharge outlet, the apparatus has a tray for collecting a sheet from the sheet discharge outlet, and a sheet discharge rotating body for transferring the sheet that is carried out to the tray toward a sheet end regulation member, and is configured to be able to adjust the timing of shifting the sheet discharge rotating body to an operation position engaging in the sheet from a withdrawal position above the tray corresponding to image formation conditions of the sheet.

Abstract: There is provided a technique in which a retracting operation of a bundle of sheets from a stapler after a staple process can be stably performed irrespective of the number of sheets constituting the bundle of sheets or the transport resistance. When the bundle of sheets subjected to the staple process is moved by a stacker in a direction of retracting from the stapler, an alignment roller is caused to come in contact with the bundle of sheets held by the stacker and to assist the movement of the bundle of sheet.

Abstract: A printing system capable of increasing the working efficiency of an operator engaged in a post-process necessary after printing can be provided. For this purpose, the user interface unit can execute a display which allows the operator to explicitly input, for each job, instruction information in consideration of a post-process necessary after a printing process in a job requiring a printing process by a printing apparatus in a printing system capable of stacking, on a stacking unit, printed materials having undergone the printing process. When the job to be processed is a job for which the operator inputs the instruction information via the display, printed materials of the job for which the operator inputs the instruction information are stacked on the stacking unit while the printed materials are classified every printed materials on the basis of the instruction information input by the operator for the job.

Abstract: A finisher includes a bundle hook configured to push a sheet bundle in a first direction and convey the sheet bundle; a drive unit configured to drive the bundle hook in the first direction and a second direction; a discharge unit configured to discharge the sheet bundle conveyed by the bundle hook; a stacking unit configured to stack the sheet bundle discharged by the discharge unit; and a control unit configured to control the drive unit to drive the bundle hook in the second direction if the drive unit drives the bundle hook in the first direction and the discharge unit discharges the sheet bundle.

Abstract: An image reading apparatus is provided with a carriage accommodating an optical unit for image reading, a driving member for moving the carriage, a guide rail, a guide-rail engaging portion engaged with the guide rail, a holding portion for holding the driving member, a guide plate and a claw portion. The claw portion presses the guide-rail engaging portion against the guide rail by partially deforming the driving member to produce a tensile force in the driving member and causing the tensile force to act on the first end portion of the carriage, and produces such a rotation moment for biasing the first end portion of the carriage in a first direction parallel with a sub scanning direction and, on the other hand, biasing the second end portion of the carriage in a second direction opposite to the first direction and parallel with the sub scanning direction.

Abstract: A sheet processing apparatus which is capable of improving the productivity of sheet processing as much as possible. An image forming apparatus forms an image on a sheet. A finisher is connected downstream of the image forming apparatus and performs post processing on the sheet. The finisher moves at least one of the sheet and a punching unit to adjust a position for punching holes in the sheet. The finisher determines whether or not a post-processing apparatus connected upstream of the finisher is provided with a correction mechanism for correcting a position of a sheet in a direction orthogonal to a sheet conveying direction. When the post-processing apparatus is provided with the correction mechanism, the finisher causes the image forming apparatus to be set such that a sheet conveying interval becomes shorter than when the post-processing apparatus is not provided with the correction mechanism.

Abstract: Provided is a sheet processing apparatus for processing sheets, including: a sheet process tray on which sheets to be processed are stacked; a sheet transport means for transporting processed sheets on the sheet process tray; a pressure member which is provided on an upstream side of the sheet transport means with respect to a sheet transport direction and which moves in the sheet transport direction while pressing the processed sheets, for transporting the processed sheets in cooperation with the sheet transport unit; and a controller for selectively operating the pressure member.

Abstract: A sheet processing apparatus includes: a staple tray on which sheets are stacked temporarily and stapled after being aligned together and from which the stapled sheets are discharged to a discharge tray; a discharger to discharge the sheets to the staple tray; a rear end reference against which rear ends of the sheets are abutted to be aligned together; a returner to return the sheets discharged by the discharger and to align the sheets together in a conveying direction based on the rear end reference fence; a lifter to lift and lower the returner with respect to a sheet; and a guide configured to guide the sheets toward the rear end reference fence when the sheets are returned and to be lifted and lowered in synchronization with the lifting and lowering by the lifter.

Abstract: A sheet collecting apparatus has a sheet transport path for transporting a sheet, a tray device for bearing and storing sheets, a regulation stopper for regulating the sheet, a holding path to temporarily hold a sheet, an alignment roller to transport the sheet, and a control device for controlling transport of the sheet. The alignment roller adjusts a level of pressing force acting on the sheet transported onto the tray device. The control device has a first operation mode and a second operation mode. In the first operation mode, the alignment roller applies a transport force to the sheet by a predetermined pressing force after a rear end of the sheet is carried into the tray device, while in the second operation mode, changing the pressing force applied to the sheets from the alignment roller from a first pressing force to a second pressing force and applying varied transport force.

Abstract: According to one embodiment, a tray includes a take on surface on which a sheet is placed, a projecting portion configured to stick out from the take on surface, and a slip stopper including a sheet-slip stopper portion having a larger frictional coefficient with the sheet than the take on surface has. The slip stopper sticks the sheet-slip stopper portion out from the take on surface when the sheet comes into contact with the projecting portion.

Abstract: In a sheet processing apparatus that, for example, sorts or staples sheets after image formation, when preceding finishing is not completed on a processing tray, a third sheet fed anew into a waiting tray of a sheet placing member configuring a sheet waiting unit, which temporarily puts a sheet conveyed thereto on standby, is stacked to be shifted such that leading ends of second and third sheets are located further on a conveying direction upstream side than a leading end of a first sheet. Consequently, longitudinal alignment in the processing tray after that is surely performed.

Abstract: A placing table includes a placing surface on which a substrate is placed; a suction unit which sucks the substrate to the placing surface; a separation unit which separates the substrate from the placing surface; and a rotation unit, being a part of the placing surface and rotating about a vertical axis with respect to the placing surface. In the table, the suction unit sucks the substrate to the placing surface at the rotation unit and the separation unit separates the substrate from a part of the placing surface excluding the rotation unit if the rotation unit is rotated.

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 processing apparatus which is capable of improving the productivity of sheet processing as much as possible. An image forming apparatus forms an image on a sheet. A finisher is connected downstream of the image forming apparatus and performs post processing on the sheet. The finisher moves at least one of the sheet and a punching unit to adjust a position for punching holes in the sheet. The finisher determines whether or not a post-processing apparatus connected upstream of the finisher is provided with a correction mechanism for correcting a position of a sheet in a direction orthogonal to a sheet conveying direction. When the post-processing apparatus is provided with the correction mechanism, the finisher causes the image forming apparatus to be set such that a sheet conveying interval becomes shorter than when the post-processing apparatus is not provided with the correction mechanism.

Abstract: The sheet processing apparatus is provided with: a sheet aligning part that accumulates and aligns sheets so as to generate a bundle of sheets; an edge stitching processor that performs an edge stitching process by which the generated bundle of sheets is stitched together at one edge of the bundle of sheets; an apparatus housing that includes an opening portion through which the bundle of sheets is discharged to an outside of the apparatus housing; a saddle stitching processor that performs, outside of the apparatus housing, a saddle stitching process by which the discharged bundle of sheets is stitched together at a center portion of the bundle of sheets in a transporting direction of the bundle of sheets; and a stacking tray that is provided below the opening portion and outside the apparatus housing, and on which the bundles of sheets subjected to the edge stitching process and the saddle stitching process are capable of being stacked.

Abstract: The present invention provides a sheet processing apparatus including: a conveying portion which conveys a sheet; a stacking portion which stacks the sheet conveyed by the conveying portion; a first processing unit which performs a process to the sheet at a first process position on the stacking portion; a second processing unit which performs a process to the sheet at a second process position on the stacking portion, the second process position being at the downstream side in the conveying direction of the first process position; and a controlling portion which performs positioning of the sheet at the first process position when the first processing unit performs the process to the sheet and positioning of the sheet at the second process position when the second processing unit performs the process to the sheet which is passed through the first process position without being positioned.

Abstract: Affords sheet stacking device that, in stacking sheets onto a loading tray, enables stacking of the sheets always in the correct posture regardless of the nature of the sheets' surface material. The sheet stacking device includes a tray unit located downstream of a sheet discharging port, a sheet-end regulating member provided on the tray unit, a conveying unit for transporting sheets carried out onto the tray unit though the sheet discharging port, toward the sheet-end regulating member, and a conveyance controller for controlling the conveying unit. In conveying toward the sheet-end regulating member a sheet having been carried onto the tray unit, the conveyance controller varies the running time during which the conveying unit applies conveyance force to the sheet, in accordance with the material nature of the sheet surface.

Abstract: In a sheet aligning apparatus, a pair of sheet aligning members stops at three positions such that when a sheet aligning operation is not conducted, the pair of sheet aligning members is stopped at the first position of an upper level so as not to come in contact with sheets discharged from a discharging section, when the sorting section shifts for sorting, the pair of sheet aligning members is stopped at the second position of a middle level lower than the first position so as not to come in contact with sheets stacked on the tray, and when a sheet aligning operation is conducted, the pair of sheet aligning members is stopped at the third position of a lower level so as to come in contact with the top surface of the tray or the upper surface of the sheets stacked on the tray.

Abstract: A sheet alignment and ejection mechanism includes a sheet alignment device, a sheet ejection device, a power device and a transmission unit. The sheet alignment device includes a first one-way element. The sheet ejection device includes a second one-way element. The transmission unit includes plural gears. The transmission unit is connected with the power device, the first one-way element and the second one-way element for driving rotation of the first one-way element and the second one-way element. The first one-way element and the second one-way element are rotated in opposite directions. When the first one-way element is rotated in a first direction, the sheets aligned on a sheet placement tray are aligned by the sheet alignment device. When the second one-way element is rotated in the first direction, the stapled sheets are ejected out of the sheet placement tray by the sheet ejection device.

Abstract: A sheet processing apparatus according to an aspect of the invention can process a first-size sheet having a first length and a second-size sheet having a second length smaller than the first length. The sheet processing apparatus includes an intermediate stacking portion on which the sheets are stacked; a stapler which performs a stapling process to the sheets; a second alignment reference wall and a first jogger which align the sheets with a stapling process position; and a second jogger which is moved toward the second alignment reference wall and first jogger. Irrespective of a sheet size, the second jogger is moved toward the second alignment reference wall and first jogger by an alignment distance necessary to align the second-size sheet with a stapling process position, which allows the stapler to staple the sheets with at least one of two staple legs.

Abstract: A sheet collecting apparatus has a sheet discharge outlet, a tray device for bearing and storing sheets, a regulation stopper disposed in the tray device; a forward/backward rotation roller, a roller lifting/lowering device, a sheet pressing guide disposed between the forward/backward rotation roller and the regulation stopper; a pressing force reducing device for reducing a pressing force, and a control device for controlling the forward/backward rotation roller, the roller lifting/lowering device and the pressing force reducing device. The control device is configured to rotate forward the forward/backward rotation roller in the operating position to move forward a carried-in sheet in the sheet discharge direction by a predetermined distance, and then rotate backward the forward/backward rotation roller. The control device has two operation modes that are selectively executed a first operation mode and a second operation mode.

Abstract: A system for binding variable thickness multi-sheet collations includes first and second processing stations including a stitcher and stapler, respectively and a means for determining the thickness of a multi-sheet collation. A processor is responsive to a thickness value signal and selects one of the first and second processing stations to bind the multi-sheet collation. A conveyance system then transports the multi-sheet collation to the selected one of the first and second processing stations. A method includes the steps of: stacking sheet material to produce a multi-sheet collation, determining the thickness of the multi-sheet collation, and selecting an apparatus to bind the multi-sheet collation from one of at least two binding apparatus based upon the thickness of the multi-sheet collation. The multi-sheet collation is then conveyed along a feed path to a selected one of the binding apparatus.

Abstract: A sheet processing apparatus including a cross-directionally moving device for moving a sheet in a direction crossing a sheet discharging direction, and a cross-side restricting member for receiving one side edge of the sheet moved in the crossing direction by the cross-directionally moving device, and restricting the movement of the sheet, wherein the cross-directionally moving device moves the next sheet from a position between the other side edge of the sheet received by the cross-side restricting member and the cross-side restricting member to the cross-side restricting member.

Abstract: When a sheet bundle is being conveyed by any one pair of plural pairs of rollers independently movable toward and away from the bundle sheet, before the bound portion of the sheet bundle passes the pair of rollers, the pair of rollers on the downstream side nearest to the bound portion are separated from the sheet bundle, and the pairs of rollers more downstream than that pair convey the sheet bundle. Thereby, it happens less often that the pairs of rollers gather the air collected between adjacent ones of the sheets of the sheet bundle to the bound portion to thereby cause a slack to the sheets, and the occurrence of wrinkles or twists in the sheet bundle can be reduced. Also, the pair of rollers are separated from the sheet bundle before the bound portion passes the pair of rollers, whereby it happens less often that the pair of rollers are damaged by the bound portion, and the sheet bundle can be conveyed smoothly.

Abstract: A sheet processing apparatus according to an embodiment includes a post-processing unit that post-processes a sheet carried from an image forming apparatus, a sheet discharge unit that discharges the post-processed sheet to an outlet, a storage tray that stacks the sheet discharged from the outlet and can move in the vertical direction, and a first transverse alignment portion that is provided at the storage tray and aligns the sheet discharged from the outlet from the width direction.

Abstract: A sheet finisher includes: a stacking section having a stacking surface arranged to be tilted, and a stopper located below the stacking surface; a sheet finishing section which post-processes for a sheet bundle that hits the stopper and is stacked on the stacking section; a conveying section which sends two sheets to the stacking section under the condition that the two sheets are shifted each other in a conveyance direction and are superimposed; an input section in which sheet type information is inputted; and a controller which adjusts a shift amount between the two sheets so that the sheet on a lower side precedes toward the stopper by a prescribed amount, when a conveyance condition of the conveyance section is changed based on the inputted sheet type information inputted, and the two sheets are conveyed to the stacking section with the two sheets superimposed.

Abstract: A sheet finishing apparatus includes: a conveying roller configured to convey a sheet to a storage tray; a positioning stopper provided in parallel to a conveying path for the sheet; an aligning roller configured to convey the sheet, move the sheet in a lateral direction orthogonal to a direction of the conveyance, and press the sheet against the stopper to laterally align the sheet; and a moving mechanism configured to move the position of the aligning roller in the conveying direction. The sheet finishing apparatus controls the position of the aligning roller according to a size of the sheet.

Abstract: A post-processing device include a conveyed medium stacking portion, a medium bundle stapling member, a medium bundle stacking portion and a medium bundle stacking control unit. A plurality of recording mediums, on which images are recorded, are conveyed and stacked into the conveyed medium stacking portion. The medium bundle stapling member staples a medium bundle, which is a bundle of the plurality of recording mediums stacked on the conveyed medium stacking portion, with staples. The stapled medium bundle is conveyed and stacked into the medium bundle stacking portion. The medium bundle stacking control unit stacks a second medium bundle on a first medium bundle under the condition that a second stacking stapling position deviates from a first stacking stapling position in a width direction by a distance not less than a staple width.

Abstract: An object of the invention is to provide a sheet alignment apparatus that is excellent in alignment properties in the conveyance direction and operates stably without being affected by various conditions, and a sheet post-processing apparatus having therein the sheet alignment apparatus. Alignment members are constructed so that alignment surfaces of the alignment members arranged to be in a form where a distance between the alignment surfaces grows greater toward the downstream side, or the direction of movement of the alignment member is made to be an oblique direction pointing to the stopper.

Abstract: A sheet ejection device includes: a sheet ejection tray adapted to stack a sheet ejected thereon; an alignment member which aligns a position in a width direction and a direction perpendicular to a sheet ejection direction of the sheet on the sheet ejection tray; and a supporting unit which supports the alignment member so that the alignment member is displaced in a direction intersecting the sheet ejection direction when outer force is applied to the alignment member.

Abstract: A bookmaking apparatus includes a first path to convey a sheet bundle, a second path to convey a cover sheet, a joining stage disposed at an intersection of the first path and the second path, a gripping conveyance device arranged for gripping and a conveyance device arranged at a downstream side of the joining stage for conveying out the cover sheet and sheet bundle. The gripping conveyance device includes clamping members to grip the sheet bundle and clamping control device for opening and closing the clamping members. The clamping control device operates the clamping members to grip a lower edge of the sheet bundle when joining the sheet bundle to the cover sheet, and the clamping members to retract to an upstream side of the first path and to grip the sheet bundle again when conveying the joined sheet bundle to the conveyance device.

Abstract: A conveying unit has a nipping hook to nip a sheet bundle and conveys the sheet bundle while nipping the sheet bundle with the nipping hook. A discharge roller sequentially discharges the sheet bundle conveyed by the conveying unit. A stack unit stacks the sheet bundle conveyed by the conveying unit. A shutter is provided between the discharge roller and the stack unit. A push-out lever is fixed to the discharge roller. An opening is provided on one side of the shutter, and a push-out part which causes the push-out lever to protrude to the stack unit from the opening of the shutter with a rotation of the nipping pawl is provided on the nipping hook. The push-out lever caused to protrude to the stack unit by the push-out part pushes out the sheet bundle to the stack unit in accordance with the rotation of the nipping hook.

Abstract: A sheet processing apparatus includes an intermediate stacking portion which temporarily stacks, thereon, a sheet conveyed thereto; a discharge portion which discharges sheet stacked on the intermediate stacking portion; an aligning member which is provided downstream of the discharge portion in a sheet conveying direction and has a sheet holding surface capable of holding the lower surfaces of the sheet and a sheet aligning surface capable of abutting against end portions of the sheet in the widthwise direction orthogonal to the sheet conveying direction, the aligning member being movable in the widthwise direction; a first stacking portion which is provided below the aligning member and stacks, thereon, a sheet discharged from the discharge portion; and a second stacking portion which is provided above the aligning member and stacks, thereon, a sheet conveyed thereto; wherein a standby position of the aligning member is at a position more inward than the outermost position in the widthwise direction, within

Abstract: A sheet post process device with a stapler mechanism includes a conveying path configured to convey a sheet on which an image is formed to the stapler mechanism; a first sensor disposed along the conveying path and configured to detect a moving position of the sheet; and a tray in which the sheets are stacked to undergo a stapling process; and a rotary cam having a spiral shape disposed at a conveying path outlet through which the sheet is ejected from the conveying path to the tray. When the sheet passes through the conveying path outlet, the cam rotates and comes into contact with the sheet to move the sheet to the tray.

Abstract: A sheet stack apparatus comprises a storage portion configured to support sheets conveyed one by one in a standing position, a receiving portion configured to receive lower ends of the sheets supported by the storage portion, an assisting member configured to move from a first position to the storage portion side and at a second position where the assisting member contacts with the sheets conveyed to the storage portion, assist stacking of the sheets on the storage portion, and a holding member configured to move in correspondence with a movement of the assisting member via an attaching portion, when the assisting member is at the second position, separate from the lower ends of the sheets, and when the assisting member is at the first position where the assisting member is separated from the sheets supported by the storage portion, contact with the lower ends of the sheets, thereby hold them on the storage portion side.

Abstract: There is provided a technique in which a retracting operation of a bundle of sheets from a stapler after a staple process can be stably performed irrespective of the number of sheets constituting the bundle of sheets or the transport resistance. When the bundle of sheets subjected to the staple process is moved by a stacker in a direction of retracting from the stapler, an alignment roller is caused to come in contact with the bundle of sheets held by the stacker and to assist the movement of the bundle of sheet.

Abstract: A sheet processing apparatus is provided with a sheet discharge path (first carry-in path P1) that sequentially carries out a sheet, a processing tray that collects sheets from the sheet discharge path in the shape of a bunch, a stacker that holds the sheets from the processing tray, and bunch carrying device disposed in the processing tray to carry out a bunch of sheets toward the stacker. The bunch carrying-out device includes a carrier member disposed movably in the sheet-bunch carrying-out direction of the processing tray, and a sheet engagement member that engages the bunch of sheets on the processing tray. The sheet engagement member is mounted on the carrier member to be able to move to position in the sheet-bunch carrying-out direction.

Abstract: A sheet processing apparatus of the invention has: a movement blocking unit for blocking a movement of a sheet which is moved to a side edge aligning unit by a moving unit, thereby allowing the moving unit to position adjustment slip move on the sheet so as to adjust a relative position with the sheet; and a block cancelling unit for allowing the movement blocking unit to cancel the block of the movement of the sheet when the moving unit slips and moves by a predetermined distance.

Abstract: A reference member serves as a reference for aligning trailing edges of a stack of sheets stacked on a binding tray. A binding unit binds the sheets with the trailing edges aligned. A discharge unit discharges the sheets with or without performing the binding process from the binding tray to a discharge tray. The reference member is movable in a sheet width direction such that a first position of the reference member at a time of discharging the sheets without performing the binding process is closer to a center of the binding tray than a second position of the reference member at a time of discharging the sheets with performing the binding process.

Abstract: There is provided a technique in which while the occurrence of a sheet jam is avoided, a pair of folding rollers for a folding process and a stapler for a staple process can be disposed to be close to each other, and a contribution can be made to the improvement of productivity.

Abstract: A finisher includes a bundle hook configured to push a sheet bundle in a first direction and convey the sheet bundle; a drive unit configured to drive the bundle hook in the first direction and a second direction; a discharge unit configured to discharge the sheet bundle conveyed by the bundle hook; a stacking unit configured to stack the sheet bundle discharged by the discharge unit; and a control unit configured to control the drive unit to drive the bundle hook in the second direction if the drive unit drives the bundle hook in the first direction and the discharge unit discharges the sheet bundle.