Abstract: An image processing apparatus and an image forming apparatus are supplied capable of adjusting binding margins per quire included in a quire book. In the image processing apparatus that has a setting section sets a quire page number of each quire; a size obtaining section obtains medium size information of the print mediums; an assigning and obtaining section assigns respective page numbers to each page of inputted image data and obtains an image page number; a page calculating section calculates an all page number of the quire book on the basis of the quire page number and the image page number; a determining section respectively determines a print region corresponding to the respective page number on the basis of the quire page number, the medium size information and the all page number; and a changing section respectively changes the image data to change image data within the determined print region.

Abstract: A checking system for checking an image printed sheet includes a post processing control unit that performs control to execute binding of a sheet bundle containing a plurality of sheets determined to be normal based on a checking result and to discharge the sheet bundle to a first sheet discharge unit and a discharge control unit that performs control, in a case where a sheet is determined not to be normal, to discharge the sheet to a second sheet discharge unit, wherein in a case where a sheet is determined not to be normal cannot be discharged to the second sheet discharge unit, a sheet bundle containing the sheet determined not to be normal is discharged to the first sheet discharge unit without executing the binding.

Abstract: A print control apparatus includes an input unit configured to input a binding position of sheets related to a binding processing for the sheets on each of which an image is printed based on print data, a setting unit configured to set a printing position of an auxiliary image of transparent color to be printed with the image that is printed based the print data, according to the binding position of the sheets input by the input unit, and a print control unit configured, based on the printing position of the auxiliary image set by the setting unit, to control printing of the auxiliary image.

Abstract: A bookbinding device receives a sheet on which an image is formed from an image forming apparatus. In the bookbinding device, a punching unit performs a punching process on a sheet; an aligning unit aligns a plurality of sheets on which holes are punched; and a ring binding unit mounts, in the holes of the sheets aligned by the aligning unit, a ring-shaped binding tool to create a booklet. A prohibiting unit, if a sheet received from the image forming apparatus is a punched sheet having a hole thereon, causes the punching unit not to perform the punching process on the punched sheet.

Abstract: A sheet handling apparatus includes a sheet reception unit configured to receive a sheet; an alignment unit configured to align the sheet in a conveying direction of the sheet, a trailing edge of the sheet in the conveying direction coming into contact with the alignment unit; and a moving unit configured to move the alignment unit along the sheet reception unit in the conveying direction. A first position for aligning and binding sheets and a second position located above the first position in the sheet reception unit are set for the alignment unit as receiving positions at which the sheet is received from the sheet reception unit.

Abstract: A bookbinding apparatus which makes it possible to shorten a time period required to heat an adhesive when the power of the bookbinding apparatus is turned on again. A glue preparation section heats glue. A glue applying section applies the heated glue to a recording sheet bundle. A CPU of the bookbinding apparatus determines at the power-on of the apparatus whether or not there is a recording sheet bundle to which glue is to be applied within the apparatus. When there is no such recording sheet bundle, the glue applying section applies glue to a recording sheet bundle after the temperature of the glue has reached a first target temperature, whereas when there is such a recording sheet bundle, the glue applying section applies the glue to the recording sheet bundle after the glue temperature has reached a second target temperature lower than the first target temperature.

Abstract: An image forming apparatus for printing on at least one page of a print media is disclosed. The apparatus includes a removable media handling device that directs the printed media to a first location or a second location, the second location functions as a finishing stage to perform a finishing step on the print media. The removable media handling device includes a media diverter to direct the media to either the first or second location. The image forming apparatus also includes a housing, a print engine to fix an image representing data to the page of print media, a formatter to supply data to the print engine, the formatter being configured to supply a first set of data representing the side of the page to be printed and a second set of data to provide instructions on the output of the printed page, and print media supplier to supply pages of print media to the print engine from a stack of print media pages having leading edges.

Abstract: A bookbinding apparatus comprising: an adhesive container to store melted adhesive; a heater which heats the adhesive to melt; a stirring member to stir the adhesive in the adhesive container; and a control section which controls the operation of the heater and the stirring member so that after the heater has been turned off with the termination of a coating process, the stirring member continues stirring operation and stops thereafter.

Abstract: An image forming apparatus which has a double-side copying function, including: at least either one of an original document detection section that detects a size of an original document, and an original document size setting section that sets a size of the original document as required; an original document top position setting section that sets a top position of the original document as required; a binding direction setting section that sets a binding direction of the original document and a binding direction of an output sheet as required; an output size setting section that sets a size of the output sheet as required; a print magnification ratio setting section that sets a print magnification ratio as required; and a copy region determination section that sets a copy region with reference to a top left corner of the original document, the top left corner being identified when the original document is placed such that the top position thereof is upward.

Abstract: An image forming apparatus is controlled such that the amount of heat supplied to an outer surface recording sheet to be placed onto an outer surface of a book document for fixing a toner image thereon is greater than an amount of heat supplied to each of the other recording sheets to be placed onto an inner side of the book document for fixing a toner image thereon.

Abstract: An image forming device includes a scanner swingable between a closed position to close an upper side of a catch tray of a printer and an opened position to open the upper side of the catch tray, a positioning mechanism having a protruding section formed at one of the printer and the scanner and a recessed section formed at the other such that the protruding section is fitted thereinto in the closed position, and a lock mechanism configured with an engagement hole formed at one of the protruding section and the recessed section and an engagement portion formed at the other so as to hold the closed position by engagement therebetween. When the scanner is swung to the closed position, a contact portion of the protruding section contacts a contact portion of the recessed section before the engagement portion contacts the engagement hole or a region around the engagement hole.

Abstract: The one embodiment of present invention provides an image forming apparatus including a memory unit that stores image data, a main control block that causes an image forming section to output an output image onto an output medium on the basis of the image data generated by an image reading section and stored in the memory unit, case members that houses any one of the memory unit and the main control block or both, respectively, and a cooling mechanism that is located in a predetermined position of the case members and guides an air flow that has passes through one case member to the other case member.

Abstract: A bookbinding apparatus includes a glue coating device that coats glue on a back of a sheet bundle, a sheet bundle supporting device that supports the sheet bundle on which glue is coated a cover sheet supporting device that supports a cover sheet, a moving device that moves at least one of the sheet bundle supporting device and the cover sheet supporting device, and thereby changes a distance between the back of the sheet bundle and the cover sheet, and a control device that controls the moving device, wherein the control device controls the moving device so that a distance between the back of the sheet bundle on which the glue are coated and the cover sheet is set to a distance D1, then the distance is set to a distance D2 that is greater than the distance D1.

Abstract: A finishing unit includes a first compiling module and a second compiling module operatively connected in parallel with the first compiling module. Each compiling module includes a finishing head adapted to perform a finishing operation upon a plurality of sheets of media. A printing system includes a sheet media source, a finishing unit operatively spaced from the sheet media source and a marking unit operatively disposed therebetween. A method of performing a print job using such first and second compiling modules is also included.

Abstract: A sheet pre-processing device includes a space portion as a sheet receiving unit that receives a pre-processed sheet, a first sheet conveying path for discharging the sheet to the sheet receiving unit, and a second sheet conveying path for reversing the sheet. A sheet post-processing device is removably attached into the space portion. When the sheet post-processing device is attached into the space portion, a conveying path and a reversing path works are provided, which are switched over by a switching unit.

Abstract: A sheet folding apparatus includes a fan folding unit that fan folds a folded-back sheet into a width or length of the regular size to file the sheet in the regular-size folder such that the sheet forms layers along a traveling direction of the sheet; first and second punching units that punch the filing hole in the sheet fan folded, respectively, into the width and the length of the regular size at the portion to be punched to file the sheet in the regular-size folder; and a sheet-processing setting unit that sets a fold mode of the fan fold and selects one of the first punching unit and the second punching unit for use in punching of the filing hole in the sheet based on a size and orientation of the delivered sheet.

Abstract: A bookbinding system includes an image forming unit to form a toner image on a sheet; a fixing device to fix the toner image onto the sheet; a sheet stacker to load sheets passing through the fixing device, to create a sheet bundle, in which the sheet bundle stacked on the sheet stacker is adhered to produce a complete book; an adhesive toner image forming unit to form an adhesive toner image on an area corresponding to a spine of the complete book; and a heater to heat the unfixed adhesive toner image formed on each sheet of the sheet bundle stacked on the sheet stacker, wherein the adhesive toner image on the sheet stacked on the sheet stacker is the unfixed toner image.

Abstract: In an image forming apparatus, when a first sheet discharger discharges a sheet bearing an image in a first direction from a proximal end to a distal end of the image forming apparatus, a post-processing device performs post-processing including at least one of stapling, punching, stamping, and sorting of the sheet discharged from the first sheet discharger. After a second sheet discharger discharges the processed sheet in a second direction opposite to the first direction in which the first sheet discharger discharges the sheet bearing the image, a sheet stacker stacks the sheet discharged from the second sheet discharger. A sheet conveyance path is provided between the first sheet discharger and the second sheet discharger. An opening is provided between the sheet stacker and an image reader so that the sheet discharged from the second sheet discharger can be retrieved from the sheet stacker in the second direction.

Abstract: An image forming system which realizes reliable output of an original of a finished book, while maintaining security. A sheet-unique information-reading unit reads sheet-unique information unique to a sheet used for making a finished book based on image data. A memory section stores the sheet-unique information read by the sheet-unique information-reading unit in association with the image data based on which a finished book is made. In outputting an original of the finished book, a CPU causes an image forming device to perform image output based on the information stored in the memory section.

Abstract: Printers are provided. In one aspect, a printer has a printer controller cooperating with a print engine, receiver transport system, overlap positioning system, and fuser to cause a first toner image to be formed on the first side of the first receiver with toner at least in an overlap area proximate to a first edge of the first receiver; to overlap the first edge of the first receiver with a second edge of the second receiver having a second thickness at a second end and to fuse the overlapped first receiver and second receiver to cause the toner in the overlap area to bond the first receiver to the second receiver. The first toner image includes an edge concealment toner pattern positioned confronting the second edge with the edge concealment toner pattern having toner that reduces the visual impact of image artifacts created by the overlapping second edge.

Abstract: An image forming system includes an electrophotographic image forming apparatus which forms an image on a sheet of paper, and a paper coloring apparatus which is connected to the electro-photographic image forming apparatus. The paper coloring apparatus includes a coating apparatus having two coating rollers which coat colored water on both faces of the paper sheet on which the image has been formed by the electro-photographic image forming apparatus. A supply section selectively supplies one of the colored water and a colorless water onto the two coating rollers of the coating apparatus. And a controller is provided for switching between a coloring process to color the paper sheet by supplying the colored water onto the two coating rollers, and a humidifying process to humidify the paper sheet by supplying the colorless water onto the two coating rollers.

Abstract: An image forming apparatus to form an image on a sheet media, including: a memory section which memorizes a position of holes previously punched on the sheet media; an operation section via which the sheet media to be used for image formation, a double-surface print operation and a binding direction are selected; and a control section which determines whether the position of the holes previously punched on the selected sheet media is the same as the binding direction selected via the operation section, after the sheet media carrying the holes and the double-surface print are selected via the operation section, wherein the control section interrupts starting operation of the image formation, if the position of the holes previously punched on the selected sheet media is not the same as the selected binding direction.

Abstract: An image formation processing system is provided with an image formation portion, an adhesive applying portion which receives a plurality of sheets from the image formation portion, gathers the received sheets in the shape of a bundle to form a sheet bundle, and applies an adhesive to an end face of the sheet bundle, and a post-processing portion which receives a plurality of sheets from the image formation portion, gathers the received sheets in the shape of a bundle to form a sheet bundle, and performs predetermined post-processing on the sheet bundle, where the adhesive applying portion is disposed downstream of the image formation portion in the sheet transport, while the post-processing portion is disposed downstream of the adhesive applying portion in sheet transport.

Abstract: An apparatus includes a setting unit configured to set binding processing for binding a part of the document data including data of plurality of pages as a partial binding set for the document data, and a display control unit configured to display a setting verification image for verifying a status of setting of the binding processing by using a binding mark, which indicates that the binding processing is set, on a display apparatus in a display state in which the plurality of partial binding sets is discriminable.

Abstract: The invention is to provide a miniaturized sheet processing apparatus in that a conveying length a conveying distance need not be increased even though the number of sheets per bundle increases. A glue applying bookbinder that partially glues sheets and performs a pressing process to form a sheet bundle. The glue applying bookbinder includes a processing tray that stacks sheets, a glue applying portion that applies a glue on the sheets on the processing tray, and pressing portions that press the sheets on the processing tray. The glue applying portion is arranged such that the glue applying portion can be moved from a first standby position outside the sheets stacked on the stacking portion to a second standby position, different from the first standby position, outside the sheets through an upper surface of the sheets, and the pressing portions are moved integrally with the glue applying portion.

Abstract: The present invention provides a sheet processing apparatus and an image forming apparatus which can achieve reduction of running cost. A notch part forming portion 400A including a punch 403 and a die 404 forms plural notch parts in an end part of a sheet bundle folded by a sheet folding portion. A discharge roller pair 402a and 402b turns back the notch parts to bind the sheet bundle. As a result, the sheet bundle can easily be opened and the reduction of the running cost can be achieved because stapling is not performed.

Abstract: A glue container receiving hot-melt adhesive, an applicator roll, an apparatus casing, and disposed therein, a cooling unit and its control unit, for cooling a post-cover-sheet-processed sheaf, are provided. The control unit is configured to halt the cooling unit when adhesive is being applied to a sheaf with the applicator roll, and to actuate it after adhesive application. The control unit: (1) cools the apparatus casing interior by actuating the cooling unit when a sheaf is conveyed toward a glue application position; (2) halts the cooling unit when adhesive is being applied to a sheaf conveyed into the glue application position; and (3) reactivates the cooling unit after adhesive application. Thus controlling the apparatus-internal temperature appropriately in applying a hot-melt adhesive to a sheaf, and binding the sheaf together with a cover, etc. enables secure binding adhesion in a short time frame, without bookbinding defects such as missing leaves.

Abstract: A recording medium post-processing apparatus includes a recording medium stacking member; a first binding member that moves to an inside of a stacked area, binds the recording media by deforming the recording media, and moves to an outside of the stacked area after binding the recording media; and a guiding member disposed between the first binding member and the recording media and fixed to the first binding member, the guiding member guiding the recording media so that a gap between the recording media and the first binding member is maintained when the first binding member moves around the inside of the stacked area, wherein the guiding member has an opening that surrounds an area in which the first binding member operates to deform the recording media, and a part of the opening is narrowed in a moving direction of the first binding member.

Abstract: In a bookbinding apparatus provided with a coating device having a coating roller to coat an adhesive onto a spine of a sheet bundle by moving relatively the coating roller and the spine in both forward and backward movement while making the coating roller and the sheet bundle to face each other, the coating device includes: a first regulating member provided downstream of the coating roller in the forward movement, which regulates a thickness of a layer of the adhesive coated on the spine of the sheet bundle; and a second regulating member provided downstream of the coating roller in the backward movement, which regulates a thickness of a layer of the adhesive coated on the spine of the sheet bundle.

Abstract: A bookbinding system includes an image forming apparatus and a bookbinding apparatus connected to the image forming apparatus. The bookbinding system includes an image forming unit to form an image on a recording sheet; a loading unit to load, as a bookblock stack, plural recording sheets on which images are formed; a bonding unit to form a booklet by bonding a cover with the bookblock stack; a setting unit to set a bookblock size, a cover size, and a finishing size; a cutting unit to cut the booklet bonded together with the cover into the finishing size; a stack thickness detection unit to detect a thickness of the bookblock stack; and a bookbinding permission/inhibition determination unit to determine permission/inhibition of a bookbinding operation based on a stack thickness detection result as well as the bookblock size, the cover size, and the finishing size set by the setting unit.

Abstract: A merging module connects two printing systems at approximately 90 degrees to one another. The merging module includes a sheet rotator in a plane that is common to the paper paths of both print engines and a buffer. It also includes two bypass paths (one above and one below the rotator) to route the two paper paths around the rotator and enable both print engines to deliver their output to the appropriate finishing device as well as to the buffer.

Abstract: A recording material processing apparatus includes an image forming apparatus, a post-processing device, a recording material judging section and a recording material transport controlling section. The recording material judging section judges whether the recording material used in the image forming apparatus has post-processing permissible size and thickness or not. And the recording material transport controlling section that, permits when the recording material judging section judges the recording material has the post-processing permissible size and thickness, the recording material to be transported into the post-processing device and prohibits when the recording material judging section judges the recording material does not have the post-processing permissible size and thickness, the recording material to be transported into the post-processing device.

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 bookbinding apparatus which forms a booklet by coating adhesive onto a spine of a sheet bundle, the bookbinding apparatus comprising: an adhesive tank which stores adhesive; a supplying section which supplies solid adhesive to the adhesive tank; a melting section which melts the solid adhesive supplied to the adhesive tank; a coating section which coats the adhesive onto the spine of the sheet bundle; and a controller which controls the supplying section to supply the solid adhesive from the supplying section to the adhesive tank when an amount of adhesive that has been coated by the coating section reaches equal to or more than a predetermined value.

Abstract: According to one embodiment, an image forming apparatus includes: an image forming unit configured to form an image to be printed on a sheet; an apparatus main body including the image forming unit therein; a recessed section provided on the outer side of the apparatus main body; and a clip unit configured to clip, when the sheet is inserted into the recessed section, an end of the sheet with a paper clip.

Abstract: An image forming system includes an image forming unit that forms images on sheets; a sheet compiling unit that compiles the sheets on which the image forming unit has formed the images into a sheet stack; a first binding unit that binds a first end portion of the sheet stack by performing a first binding process; a second binding unit that binds a second end portion of the sheet stack by performing a second binding process, the second end portion being different from the first end portion; and an image rotation unit that rotates an orientation of each of the images in accordance with whether the sheet stack is to be bound by using the first binding unit or the second binding unit, the images being formed on the sheets of the sheet stack by the image forming unit.

Abstract: A binding apparatus which can meet user requests and adapt to usage conditions by a user. An adhesive is heated and melted, and then applied to a sheet bundle to bind the sheet bundle. One of the following modes is selected: a first adhesive temperature adjusting mode in which the adhesive is heated when power supply to the bookbinding apparatus is turned on, and a second adhesive temperature adjusting mode in which the adhesive is heated when binding of the sheet bundle is started.

Abstract: A double-surface printing type facsimile device is provided with a storage configured to store image data of document data received by facsimile, a printing unit configured to print the image data stored in the storage in one of single-surface printing mode and double-surface printing mode on a recording sheet, the image data being printed on one surface and the other surface of the recording sheet subsequently when the printing unit operates in the double-surface printing mode, a backup memory configured to store only the image data to be printed on the other surface of the recording sheet, and a reprinting unit configured to reprint the image data stored in the backup memory in the single-surface printing mode.

Abstract: There is set sheet post-processing (SPP) information having a post-processing-edge (PPE) code, a staple code and a punch code. When the staple code indicates one end of the PPE and the PPE is rotated towards the one end by 90° with respect to the center of the sheet, the SPP code is updated, and the staple code SC is updated to indicate the other end of the PPE. Referring to a table, it is checked if the present SPP information indicates that SPP is inhibited or an error. When determined as an error, it is judged if the PPE can be changed to the neighboring edge with removing the error. In an affirmative judgment, the error is automatically removed with the PPE being changed to the neighboring edge together with changing the SPP position and an image being rotated by 90°.

Abstract: A bookbinding system comprising: an image forming apparatus; and a bookbinding apparatus; wherein both the image forming apparatus and the bookbinding apparatus include a communication section respectively, for transmitting information from the image forming apparatus to the bookbinding apparatus; the bookbinding apparatus comprises a coating section for coating adhesive on a stack of sheets, a replenishing section for replenishing adhesive to the coating section, and a controller for controlling the replenishing section; and the controller controls replenishment rate of the adhesive by the replenishing section, based on information transmitted from the image forming apparatus through the communication section.

Abstract: A sheet post-processing apparatus (1) includes a first stapler (4) and a second stapler (5) for stapling the stack of sheets on a stack tray (61), a first moving frame member (10) on which the first stapler (4) is mounted rotatably, a second moving frame member (11) on which the second stapler (5) is mounted, a rotating member (20) rotatably mounted on the first moving frame member (10), the rotating member (20) so held in engagement with the first moving frame member (10) as to move linearly the first moving frame member (10) by rotation of the rotating member (20), and also rotating the first stapler (4) by rotation of the rotating member (20), and a single drive power source (16) for driving the rotating member (20).

Abstract: A sheet processing apparatus includes: a holding portion which holds a booklet containing a two-folded sheet; and a pressing portion which presses a spine of a booklet into shapes during movement along the spine of the booklet held by the holding portion. The pressing portion can decrease, or release a pressing force to be applied to the booklet spine within a predetermined area of a moving range in which the pressing roller moves along the booklet spine.

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 bookbinding apparatus, having a sheet bundle storing device to store a sheet bundle, a grasping device to grasp the sheet bundle stored in the sheet bundle storing device, a square spine forming device to form a square spine, wherein a pair of forming members bend a coversheet bonded onto a back section of the sheet bundle grasped by the grasping device, a pressure force controlling device to vary a pressure force of the pair of forming members to press a bending section of the coversheet in accordance with bookbinding conditions.

Abstract: In replenishing a glue container with hot-melt glue, to enable stable supply of the glue in solid form without it clogging the resupply path from the hopper, provided are: a sheet retaining unit for retaining a sheaf in a glue application position; a glue applier in a hot-melt-glue-receiving container, disposed in the glue application position, for applying glue to an endface of a sheaf there; a heater, disposed in the glue container, for heating/melting the glue inside; a heater temperature controller; a resupply hopper above the glue container for replenishing it with solid glue; a vacuum ducting unit above the container and adjoining the resupply hopper, for suctioning up glue evaporation derivatives; and a control unit configured to run the vacuum ducting unit when the glue container is being replenished with glue, to prevent or mitigate invasion of evaporation derivatives into the resupply hopper.

Abstract: A CPU of a bookbinding system sets one of a right-opening bookbinding mode for feeding a cover sheet on which a cover is laid out at the left of a spine portion thereof to create a right-opening book, and a left-opening bookbinding mode for feeding a cover sheet on which a cover is laid out at the right of the spine portion to create a left-opening book. Also, the bookbinding system controls a printer unit to invert a print sequence depending on whether the system is set in the right-opening bookbinding mode or is set in the left-opening bookbinding mode. The print sequence or inverted print sequence is set so that, of image data of multiple pages, print image data that should be the top page is arranged appropriately for creating a right-opening book or a left-opening book.

Abstract: In a bookmaking apparatus, a sheet bundle applied with adhesive in the apparatus when conveyance trouble, i.e., a cover sheet paper jam, occurs, is not left in the apparatus. Furthermore, the apparatus does not leave a cover sheet in the apparatus to be soiled if adhesive from a heated sheet bundle drops. The apparatus includes a sheet holding device for holding a sheet bundle at a predetermined adhesive application position, an adhesive application device for applying adhesive to the sheet bundle at the adhesive application position, and a cover sheet conveyance device for conveying the cover sheet to a binding position arranged at a downstream side of the adhesive application position.

Abstract: An image forming system has an image forming apparatus which has a printing unit which can perform a printing process of data of a storage unit which can store data of a plurality of jobs and which has a conveying unit which can convey a sheet from the print unit to a sheet processing device which can perform sheet processing, including at least a gluing process, for sheets from the printing unit, the system comprising: a controller adapted to permit a predetermined process related to the gluing process when the job to be processed is a job which meets a predetermined condition, and to inhibit the predetermined process related to the gluing process when the job to be processed is not a job which meets the predetermined condition, thereby overcoming obstacles to realization of an image forming system capable of a gluing process.

Abstract: A bookbinding system sets one of a right-opening bookbinding mode for feeding a cover sheet on which a cover is laid out at the left of a spine portion thereof to generate a right-opening book, and a left-opening bookbinding mode for feeding a cover sheet on which a cover is laid out at the right of the spine portion to generate a left-opening book. Also, the bookbinding system executes rotating processing for changing the top-and-bottom directions of image data depending on whether the right-opening bookbinding mode or the left-opening bookbinding mode is set so as to print image data that should be the top page, of image data of multiple pages, on a sheet serving as the top page of body, thereby appropriately generating a right-opening book and a left-opening book.

Abstract: An image forming system includes image forming device and bookbinding device. Image forming device has operation unit for selecting sheet and cover and control unit for control of warning. Bookbinding device stacks plural sheets, forms a bundle of sheets, and binds a book by wrapping sheets with the cover in a square-shape. Bookbinding device has measuring unit measuring thickness of the bundle of sheets. Control unit calculates difference between length of selected cover, and sum of twice a length of selected sheet and a spine width, and determines warning, based on result of comparison between the difference and a predetermined value; executes determination of warning in first warning mode, based on result obtained with spine width of a set value, and/or in second warning mode, based on result obtained with spine width according to measured thickness of the bundle of sheets; and executes first warning mode prior to bookbinding output.