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 spine formation device includes a sheet conveyer to transport a bundle of folded sheets, a pressing unit including a first pressing member movable according to a pressing load in a pressing direction perpendicular to the sheet conveyance direction to press opposed sides of the front end portion of the folded sheets and a second pressing member attached to the first pressing member, to press the front end portion of the folded sheets, and a spine formation member disposed at a predetermined distance from the pressing unit. The second moves in the sheet conveyance direction in conjunction with the first pressing member moving in the pressing direction and presses the folded portion of the bundle of sheets with a predetermined spine-forming load against a contact surface of the spine formation member, thereby forming a spine of the bundle of sheets.

Abstract: A spine formation device includes a sheet conveyer, a presser, and a spine formation member. The sheet conveyer conveys a bundle of folded sheets with a folded portion of the bundle of sheets forming a front end portion of the bundle of sheets. The presser is disposed downstream from the sheet conveyer in a sheet conveyance direction in which the sheet conveyer conveys the bundle of sheets. The presser is movable to press opposed sides of the front end portion of the bundle of sheets. The spine formation member is movably disposed downstream from the presser in the sheet conveyance direction. The spine formation member includes a groove portion that contacts and positions the bundle of sheets to define an amount by which the bundle of sheets protrudes from the presser and a spine formation face that forms a spine at the folded portion of the bundle of sheets.

Abstract: A sheet finisher of the invention includes a saddle stitch unit configured to stitch a center of a sheet bundle in which printed sheets are bundled, a fold unit configured to fold the center stitched by the saddle stitch unit and to form a fold line, a fold reinforcing unit that includes a reinforce roller, moves the reinforce roller along a direction of the fold line while applying pressure by the reinforce roller to the fold line of the sheet bundle transported from the fold unit, and reinforces the fold line, and a control unit configured to transport the sheet bundle from the fold unit to the fold reinforcing unit and to control to stop the fold line of the sheet bundle at a position of the reinforce roller, and the control unit changes, according to a thickness of the sheet bundle, a transport distance from a specified position in the fold reinforcing unit to the position where the sheet bundle is stopped.

Abstract: Embodiments described herein include as apparatus for folding printed sheets. The apparatus including first crease roller and a second crease roller longitudinally aligned with the first crease roller. A spacing device separating the first and second crease rollers to form a nip space therebetween. A crease blade is disposed adjacent the nip space and adapted to urge the sheets toward the nip space.

Abstract: A sheet stacking apparatus includes an alignment roller which conveys a sheet to a sheet positioning member and an opening and closing shutter which is disposed so as to face a sheet stack surface of a sheet stack guide. The sheet positioning member abuts a sheet end in a sheet conveying direction to align the sheet. The sheet is stacked on the sheet stack guide. The opening and closing shutter has a regulating area where sheet conveying guide and buckling of the sheet are regulated from an upstream side to a downstream side in the sheet conveying direction of the alignment roller. A guide interval formed between the opening and closing shutter and the sheet stack surface can be changed. Therefore, in sheet conveying positioning, the buckling can securely be prevented in the sheet stack guide.

Abstract: A sheet finisher of the invention includes a saddle-stitching unit to stitch a center of a sheet bundle, a folding unit to fold the center and to form a fold, a first and a second rollers that move along a direction of the fold while nipping and pressing the fold of the sheet bundle and reinforce the fold, and a drive section to move the first and the second rollers along the fold from a standby position apart from an edge of the sheet bundle, and the first and the second rollers are separate from each other in a thickness direction of the sheet bundle at the standby position, and after the first and the second rollers reach to a position where they pass the edge of the sheet bundle of a processable maximum size, they come close to each other in the thickness direction and nip the fold.

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: 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: An spine formation device includes a sheet conveyer, a contact member including a first row of grooves provided in a contact surface thereof to house a projection projecting from a folded portion of a bundle of folded sheets, a driving unit to move the contact member, first and second sandwiching units to squeeze the bundle, a discharge unit, and a controller. The first row of grooves extends in parallel to the folded portion of the bundle and includes at least a first pair of grooves inclined in different directions with an interval therebetween varying in size with location of the grooves in a first direction perpendicular to a sheet conveyance direction. The contact member is moved to change the size of interval between the first pair of grooves at a position aligned with the projection projecting from the folded portion of the bundle of folded sheets.

Abstract: A sheet post-processing apparatus includes a cutting device for cutting a fore-edge portion of a center-folded bunch of sheets disposed in a position spaced from a sheet discharge outlet to eliminate the risk for inflicting a wound on the body of an operator, an end binding device for gathering sheets received from a carry-in entrance and performing binding processing in the end portion of a bunch of sheets, a saddle-stitching device for gathering sheets received from the carry-in entrance and performing binding processing in the center portion of a bunch of sheets, and a center-folding device for performing center-folding processing on the bunch of sheets subjected to the saddle-stitching processing. A cutting device is subjected to the center-folding processing. A second discharge outlet is disposed in the other side face of the apparatus frame to discharge the bunch of sheets subjected to the center-folding processing in the center-folding device.

Abstract: A sheet folding apparatus including a sheet supporting member which has an inclined surface to support a stack of sheets, a sheet position adjuster which adjusts a position of the stack of sheets along the inclined surface, a sheet pressing unit which presses the stack of sheets against the inclined surface, a folding unit which folds the stack of sheets pressed by the sheet pressing unit, and a controller which controls the sheet pressing unit to press the stack of sheets on the sheet position adjuster against the inclined surface, and to create a gap between the stack of sheets on the sheet position adjuster and the sheet pressing unit to receive a sheet onto the sheet position adjuster.

Abstract: A sheet finisher of the invention includes a saddle stitch unit configured to stitch a center of a sheet bundle in which printed sheets are bundled, a fold unit configured to fold the center stitched by the saddle stitch unit and to form a fold line, and a fold reinforcing unit configured to reinforce the fold line formed by the fold unit, and the fold reinforcing unit includes a placement table on which the sheet bundle transported from the fold unit is placed, a band-like elastic member that is extended to face the fold line of the placed sheet bundle and is formed to be longer than the length of the fold line, and a roller unit that includes a reinforce roller and moves the reinforce roller along the direction of the fold line while pressing it to the fold line through the intervening elastic member.

Abstract: The image forming apparatus includes: an image processor; an image forming portion for forming images on recording paper based on the image data output from the image processor; a folding mechanism for folding the recording paper with images formed by the image forming portion when the input image information is confidential image information; and a stapling mechanism for binding the recording paper folded by the folding mechanism, at the end part when the input image information is confidential image information. When the input image information is confidential image information, the image processor outputs the pouch-binding image data for a pouch-bound image to be formed on the facing pages of the recording paper that is folded by the folding mechanism, by editing the layout of the confidential image.

Abstract: To provide a post-processing apparatus for enabling a bunch of sheets and a single sheet to be folded in simplified structure, and further enabling the folded sheet and sheets that are not folded to be mixed and bound, the post-processing apparatus has a processing tray to collate and collect sheets to perform binding processing, and a folding processing path having a folding processing section, and a folded sheet carrying-out path for carrying out a folded sheet is provided on the downstream side of the folding processing path. Then, the folded sheet carrying-out path is comprised of a circulating path for guiding the folded sheet again to the folding processing section, a post-processing path for guiding the folded sheet to the processing tray to perform post-processing, and a sheet discharge path for guiding the folded sheet to a storage stacker.

Abstract: A sheet folding apparatus includes: a saddle-stitching unit configured to stitch a center of a sheet bundle; a folding unit configured to fold the sheet bundle at the center to form a fold; a loading base onto which the sheet bundle conveyed from the folding unit is loaded; a nipping plate configured to be pressed to and separated from the loading base in parallel to the loading base and to nip the sheet bundle loaded onto the loading base; and first and second rollers that move along a direction of the fold while nipping and pressing the fold of the sheet bundle nipped by the nipping plate to reinforce the fold. Here, a surface, which faces the loading base, of the nipping plate is provided with an elastic member.

Abstract: A sheet finisher of the invention includes a saddle stitch unit configured to stitch a center of a sheet bundle in which printed sheets are bundled, a fold unit configured to fold the center stitched by the saddle stitch unit and to form a fold line, a fold reinforcing unit that includes a reinforce roller, moves the reinforce roller along a direction of the fold line while applying pressure by the reinforce roller to the fold line of the sheet bundle transported from the fold unit, and reinforces the fold line, and a control unit configured to transport the sheet bundle from the fold unit to the fold reinforcing unit and to control to stop the fold line of the sheet bundle at a position of the reinforce roller, and the control unit changes, according to a thickness of the sheet bundle, a transport distance from a specified position in the fold reinforcing unit to the position where the sheet bundle is stopped.

Abstract: A sheet processing apparatus to perform stapling includes a sheet stacking portion receiving a sheet for a sheet bundle and a positioning member against which an end of the sheet is abutted to position the sheet bundle. The positioning member is movable to adjust a stapling position on the sheet bundle where a staple processing portion performs a stapling process. After the stapling process is performed, a fold processing portion folds the sheet bundle in two. One of two surfaces of the folded sheet bundle slides on a conveyance guide member while a conveyance guide member guides the folded sheet bundle. The stapling process is performed while the stapling position is previously moved, by a predetermined distance, to an opposite area side of the sheet bundle opposite to an area that becomes the one of two surfaces of the folded sheet bundle when the sheet bundle is folded in two.

Abstract: Provided herein is a sheet processing apparatus including a processing apparatus and a saddle unit. The saddle unit moves from a position inside the processing apparatus, along a direction orthogonal to a sheet transport direction, to a position outside the sheet processing apparatus. When the saddle unit is in the position outside the processing apparatus, a first transport guide is open to expose the outside of a first sheet transport path, and a second transport guide is open to expose the inside of the first sheet transport path. The saddle unit also includes a stapler, a folding blade and a pair of folding rollers, the first sheet transport path, and a second sheet transport path.

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: According to one embodiment, a sheet finishing apparatus includes: a saddle stapling unit configured to staple a center of a sheet bundle; a saddle folding unit configured to fold the center of the sheet bundle stapled by the saddle stapling unit; a cover configured to cover the fold which is formed by the saddle folding unit so as to be in contact with the fold; and a fold reinforcing roller configured to move along the fold while applying pressure to the fold via the cover. A large number of protrusions, tips of which project to the fold, are formed on facing surfaces of the cover that are in contact with the fold.

Abstract: A sheet folding apparatus includes an adjuster which supports a stack of sheets stacked on an inclined surface of a sheet path and adjusts a position of the stack of sheets along the inclined surface, a stapler which staples the stack of sheets set at a stapling position, a folding unit which folds the stack of sheets set at a folding position, and a guide provided between the stapler and the folding unit. The stapler ejects a staple from a staple surface by sinking from the inclined surface. The folding unit includes folding rollers and a folding blade which inserts the stack of sheets into a nip between the folding rollers. The guide includes a loading surface offset from the staple surface and an uprising member which is disposed on a part of the loading surface to keep the stack of sheets symmetric with respect to the folding rollers.

Abstract: A sheet folding device includes a sheet guide for holding a sheet bunch, a folding roll device having a first folding roll and a second folding roll, a folding blade inserting the sheet bunch supported on the sheet guide to a nip position between the first and second folding rolls, and a blade driving device for moving the folding blade from a standby position to the nip position on the folding rolls. The sheet guide has a curved guide section supporting the sheet bunch and an outlet guide section connected to the curved guide section to guide the sheet bunch to the folding rolls. The curved guide section has a curved guide plate supporting the sheet bunch so that the sheet bunch rolls back toward the folding roll device. The outlet guide section includes a pair of opposite guide plates in folding the sheet bunch by the folding blade.

Abstract: There is provided a technique in which in a sheet processing apparatus including a switchback portion in a sheet transport path, a contribution can be made to the improvement of maintenance in the case where a sheet jam occurs in the vicinity of a switchback position. In a sheet processing method of a sheet processing apparatus for performing a specified process to a sheet, the sheet processing apparatus includes a first sheet transport path for transporting the sheet, and a second sheet transport path that is for performing switchback transport of the sheet transported in the first sheet transport path and includes at least one of a hole, a projection and a recess in the vicinity of a meeting position between the second sheet transport path and the first sheet transport path, and the first sheet transport path and the second sheet transport path are enabled to be integrally pulled out to the outside of the sheet processing apparatus.

Abstract: A sheet finisher of the invention includes a saddle stitch unit configured to stitch a center of a sheet bundle in which printed sheets are bundled, a fold unit configured to fold the center stitched by the saddle stitch unit and to form a fold line, and a fold reinforcing unit configured to reinforce the fold line formed by the fold unit, the fold reinforcing unit includes a placement table on which the sheet bundle transported from the fold unit is placed, and a roller unit that includes a reinforce roller and moves the reinforce roller along a direction of the fold line while pressing it to the fold line, and the placement table is provided with a groove-like edge clearance along an edge of the sheet bundle.

Abstract: According to one embodiment, a sheet processing apparatus includes: a finisher connectable to an image forming apparatus; a first castor attached to a bottom surface of the finisher and configured to support the finisher; a finishing unit provided in the finisher and configured to subject sheets sent from the image forming apparatus to finishing and discharge the sheets, the finishing unit being capable of being drawn out from the finisher; and a second castor attached to a front end in a drawing-out direction of the finishing unit and configured to support the finishing unit when the finishing unit is drawn out from the finisher.

Abstract: A sheet processing apparatus includes a first roller, a second roller configured to press the first roller to form a nip portion, a moving member opposite to the nip portion to move from a start position to an operation position approaching the nip portion, a pushing member supported on the moving member to press a sheet by an end thereof by movement of the moving member and push the sheet into the nip portion, and a third and fourth rollers positioned on both sides of the pushing member and supported on the moving member.

Abstract: A new gathering and stitching machine (10) and a new method for operating a gathering and stitching machine (1) are proposed, which make it possible to drive in the staples (K) in a positionally correct manner and to close them satisfactorily even in the case of relatively short staple setting times. This is achieved by the novel control of the position of the staple heads (20) and the saddle-shaped supports (2, 30, 40, 50) in the region of the interaction during stapling. It is an essential feature of the present invention that the staple head (20) and the support (2, 30, 40, 50) are pivoted towards one another in such a way that they come to lie within a common stapling plane (H).

Abstract: A method and device for stitching printed products with a stitching machine, which includes a stitcher head and a bending device, which travel concomitantly with each printed product as it is conveyed in a travel direction during the stitching operation. The bending device is positioned first in a first position, which corresponds to the thickness of the printed products and is a certain distance away from the stitcher head in the direction transverse to the travel direction. Before a printed product is introduced, its thickness is determined and compared with a predetermined limit value; and, if this limit value is exceeded, the bending device is brought into a predetermined second position, which is farther away than the first position from the stitching head. After the printed product has been introduced, the bending device is moved back into the first position, and the wire stitch is driven into the printed product.

Abstract: A sheet finisher of the invention includes a saddle stitch unit configured to stitch a center of a sheet bundle in which printed sheets are bundled, a fold unit configured to fold the center stitched by the saddle stitch unit and to form a fold line, a fold reinforcing unit that includes a reinforce roller, moves the reinforce roller along a direction of the fold line while applying pressure by the reinforce roller to the fold line of the sheet bundle transported from the fold unit, and reinforces the fold line, and a control unit configured to transport the sheet bundle from the fold unit to the fold reinforcing unit and to control to stop the fold line of the sheet bundle at a position of the reinforce roller, and the control unit changes, according to a thickness of the sheet bundle, a transport distance from a specified position in the fold reinforcing unit to the position where the sheet bundle is stopped.

Abstract: A sheet finisher of the invention includes a saddle stitch unit configured to stitch a center of a sheet bundle, in which printed sheets are bundled, with a staple, a fold unit configured to fold the center stitched by the saddle stitch unit and to form a fold line, and a fold reinforcing unit configured to reinforce the fold line formed by the fold unit, the fold reinforcing unit includes a roller unit that includes a reinforce roller and moves along a direction of the fold line while applying pressure by the reinforce roller to the fold line of the sheet bundle transported from the fold unit, a drive unit configured to move the roller unit along the direction of the fold line, and a control unit configured to control a movement speed of the roller unit, and the control unit causes the roller unit to move at a first speed in an outside of a specified range including the edge of the staple, and causes the roller unit to move at a second speed not higher than the first speed in the specified range including th

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 configured to bind a sheet bundle includes a folding portion configured to fold the sheet bundle, a sheet processing portion provided upstream of the folding portion and configured to form a groove at a fold position of at least one sheet of the sheet bundle, and a controller configured to control an operation of the sheet processing portion. The controller controls an operation of the sheet processing portion such that a width of a groove formed on a sheet located on an outer side of the folded sheet bundle is larger than that of a groove formed on a sheet located on an inner side of the folded sheet bundle.

Abstract: A post-processing apparatus includes a sheet carry-in path along which sheets from a carry-in port are fed through a sheet discharging port to a downstream post-processing position, and a collecting guide, for setting and collecting the sheets into a bunch. The collecting guide is located downstream of the sheet discharging port with a difference in level between the sheet discharging port and the collecting guide, is provided. A post-processing apparatus is provided for executing a stapling process and/or a folding process on the sheet bunch collected on the collecting guide. A sheet leading end regulating device is provided for regulating a position of leading ends of the sheets collected on the collecting guide device. The sheet leading end regulating device is movable according to a sheet size so that trailing ends of the sheet ends are placed at a predetermined position below the sheet discharging port.

Abstract: An image forming apparatus, a sheet discharging device and method of controlling the sheet discharging device are disclosed. They require no instructions from users and no recording materials for initial setting of a staple when the users exchange a staple cartridge.

Abstract: A sheet stacking apparatus includes a first and a second guide plate having a guide surface inclined to a perpendicular plane to take an open state having a gap of a first interval in a direction crossing the inclination direction and a closed state of a second interval narrower than the first interval, a sheet take-in portion standing by under the first and second guide plates to support sheets dropped from the guide surfaces with the leading edge thereof in a conveying direction directed downward in a standing position, and a controller configured to permit the first and second guide plates to enter the closed state and guide another sheets conveyed following the sheets supported internally by the sheet take-in portion by the guide surfaces and then to enter the open state and drop the another sheets from the gaps onto the preceding sheets.

Abstract: A sheet finisher of the invention includes a saddle stitch unit configured to stitch a center of a sheet bundle, in which printed sheets are bundled, with a staple, a fold unit configured to fold the center stitched by the saddle stitch unit and to form a fold line, and a fold reinforcing unit configured to reinforce the fold line formed by the fold unit, the fold reinforcing unit includes a roller unit that includes a reinforce roller and moves along a direction of the fold line while applying pressure by the reinforce roller to the fold line of the sheet bundle transported from the fold unit, a drive unit configured to move the roller unit along the direction of the fold line, and a control unit configured to control a movement speed of the roller unit, and the control unit causes the roller unit to move at a first speed in an outside of a specified range including the edge of the staple, and causes the roller unit to move at a second speed not higher than the first speed in the specified range including th

Abstract: A sheet post-processing apparatus including, a sheet receiving section to receive sheets, a punching device to punch sheets; an accumulating section to accumulate sheets; a stitching device to stitch the sheets accumulated in the accumulating section; a sheet discharging section to which the sheets stitched by the stitching device are discharged; and a conveyance path to connect the sheet receiving section, the punching device, the accumulating section, and the sheet discharging section, wherein the conveyance path comprises an upper loop and a lower loop and has an S-shaped conveyance path to convey a sheet from the sheet receiving section to the accumulating section; and the punching device is arranged in the upper loop.

Abstract: A saddle stitching portion which can bind the center portion in the conveying direction of a sheet bundle by a stapler and fold it by a pair of folding rollers and a pushout member, includes an end stopper which receives the downstream end of a sheet conveyed by a first conveying roller in a first receiving position on the downstream of the first conveying roller by a length not buckling the sheet on the downstream of the stapler or the downstream end of the sheet conveyed by a second conveying roller in a second receiving position on the downstream of the second conveying roller by the length on the further downstream, wherein the receiving position of the downstream end stopper is selected according to the length in the conveying direction of the sheet.

Abstract: A post-processing apparatus includes: a sheet conveyance section; a side stitching section having a side stitching stacker which has a side stitching sheet stacking surface inclined with respect to a horizontal; and a saddle stitching section having a saddle stitching stacker which has a saddle stitching sheet stacking surface inclined with respect to the horizontal, wherein an inclination angle of the side stitching sheet stacking surface with respect to the horizontal and an inclination angle of the saddle stitching sheet stacking surface with respect to the horizontal are equal to each other, and the side stitching sheet stacking surface and the saddle stitching sheet stacking surface are parallel to each other.

Abstract: A post-processing unit of an image forming apparatus includes a vertical conveying path and a horizontal conveying path. A stapling mechanism and a folding mechanism are arranged in the horizontal conveying path. When saddle processing is carried out, paper sheets sent into the horizontal conveying path are struck against a trailing end stopper and, after the number of sheets to be bound is accumulated, the center of the paper sheets is stapled and folded double. A movable tray projected to the outside of a housing is provided at a terminal end of the horizontal conveying path. The movable tray functions as a tray for discharging paper sheets that pass through a saddle stitcher and also functions as a supporting member that supports a leading end side of the paper sheets at the time of the saddle processing.

Abstract: A sheet processing apparatus of the invention includes a folding mechanism that includes paired folding rollers, presses a sheet to a nip portion of the paired folding rollers from a direction orthogonal to a transport direction, and folds the sheet by rotating the paired folding rollers. Further, there are provided a drive motor capable of making positive rotation and reverse rotation, a variable speed mechanism to convert a rotation force of the drive motor into a rotation output in a single direction and with a low speed or a high speed by changing a rotation direction of the drive motor, a transmission mechanism to transmit the rotation output in the single direction to the paired folding rollers, and a control unit to control the rotation direction of the drive motor and to change the rotation speed of the paired folding rollers.

Abstract: A sheet finisher of the invention includes a saddle-stitching unit to stitch a center of a sheet bundle, a folding unit to fold the center and to form a fold, a first and a second rollers that move along a direction of the fold while nipping and pressing the fold of the sheet bundle and reinforce the fold, and a drive section to move the first and the second rollers along the fold from a standby position apart from an edge of the sheet bundle, and the first and the second rollers are separate from each other in a thickness direction of the sheet bundle at the standby position, and after the first and the second rollers reach to a position where they pass the edge of the sheet bundle of a processable maximum size, they come close to each other in the thickness direction and nip the fold.

Abstract: A sheet finishing apparatus including a finishing unit configured to perform finishing on a sheet conveyed from an image forming apparatus, a sensor group including device sensors that are operated by a power source voltage supplied from the image forming apparatus and detect states of a plurality of devices in the sheet finishing unit, and sheet sensors that are for detecting the sheet in the finishing unit, and a control unit to control the plurality of devices in response to detection results of the sensor group. While a first finishing is being executed in the finishing unit, the control unit keeps the sheet sensor in an operable state, stops execution of another finishing, and stops operation of the device sensor for the another finishing.

Abstract: There is provided a technique in which in a case where a sheet folding process or a staple process is performed, even in the case where the size precision of a sheet used is not satisfactory, the high-precision staple process and folding process can be performed to the sheet. In a sheet processing method of a sheet processing apparatus to perform a specified process to a sheet, a relatively moved sheet is detected, the size of the sheet is calculated based on the detection result, and a position where the specified process is performed to a bundle of sheets as an object of the specified process is adjusted based on the calculated sheet size.

Abstract: A saddle stitching portion which can bind the center portion in the conveying direction of a sheet bundle by a stapler and fold it by a pair of folding rollers and a pushout member, includes an end stopper which receives the downstream end of a sheet conveyed by a first conveying roller in a first receiving position on the downstream of the first conveying roller by a length not buckling the sheet on the downstream of the stapler or the downstream end of the sheet conveyed by a second conveying roller in a second receiving position on the downstream of the second conveying roller by the length on the further downstream, wherein the receiving position of the downstream end stopper is selected according to the length in the conveying direction of the sheet.

Abstract: A post-processing apparatus for transferring sheets from a sheet carry-in port to a first post-processing section and a second post-processing section to execute post-processing such as stapling and sheet folding on the sheets, includes a sheet carry-in path located in a substantially horizontal direction. The sheets fed to the carry-in port are sequentially transferred to a predetermined sheet discharging port. A first switchback conveying path branches off from the sheet carry-in path so as to reverse a sheet conveying direction. The first post-processing section connected to the first switchback conveying path executes the post-processing on the sheets. A second switchback conveying path branching off from between the carry-in port and sheet discharging port of the sheet carry-in path is upstream of the first switchback conveying path so as to reverse the sheet conveying direction. The second post-processing section is located downstream of the second switchback conveying path.

Abstract: A sheet finisher of the invention includes a saddle stitch unit configured to stitch a center of a sheet bundle in which printed sheets are bundled, a fold unit configured to fold the center stitched by the saddle stitch unit and to form a fold line, and a fold reinforcing unit configured to reinforce the fold line formed by the fold unit, the fold reinforcing unit includes a roller unit that includes a first roller and a second roller, nips the fold line of the sheet bundle transported from the fold unit between the first roller and the second roller, and moves along a direction of the fold line while pressing, and a drive unit configured to move the roller unit along the direction of the fold line from a standby position located at a position separate from an end of the sheet bundle, and the first roller and the second roller are separate from each other at the standby position, and approach each other to nip the fold line in a region where the fold line of the sheet bundle exists.

Abstract: A image forming system that can prevent a toner from coming off while reducing the amount of consumption of a clear toner in binding sheets into a book. An image forming apparatus 100 forms an image on a sheet. A clear coating apparatus 200 forms a clear coating image on the sheet using the clear toner that becomes transparent after fixing. A bookbinding apparatus 600 connected to the image forming apparatus 100 and the clear coating apparatus 200 subjects the sheet to folding process. A job controller 501 and an image controller 502 cause the clear coating apparatus 200 to form the clear toner image at a folding position on the sheet in response to designation of a folding mode in the bookbinding apparatus 600.

Abstract: A sheet folding apparatus includes a sheet supporting member which has an inclined surface to support a stack of sheets, a sheet position adjuster which adjusts a position of the stack of sheets along the inclined surface, a sheet pressing unit which presses the stack of sheets from a lower side of the stack of sheets to an upper side of the stack of sheet, and a folding unit which folds the stack of sheets pressed by the sheet pressing unit.