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 method of producing perfect-bound printed products formed from several printed products, includes feeding printed products, which are gathered to form loose book blocks, are fed by feeders, which are arranged along a conveying line and are driven at least approximately with synchronous timing, to a conveyance device that has receiving devices that follow one another at regular intervals, and are transferred by this conveyance device into a gluing machine. The gluing machine, which is arranged downstream of the conveyance device and also has a conveying function, is run until it is empty in the event of an interruption of a processing operation by discontinuing further feeding of printed products to the receiving devices of the conveyance device and further feeding of loose book blocks to the gluing machine while the gluing machine is emptying.

Abstract: An adhesive applicator is disclosed for the application of a hot melt adhesive to the spine of a book block so as to adhesively bind the book block to its respective cover so as to form a perfect bound book. The applicator has a heated head in which a small quantity of a hot melt adhesive sufficient to bind at least one book block to its cover is quickly heated to a temperature such that it may be applied to the spine. The head is brought into operative engagement with the spine and is moved with respect to the spine so that the melted adhesive forced (dispensed) out of the head onto the spine. This applicator is particularly well suited for use with print on demand book printing and binding apparatus. A method of applying the adhesive to the spine of a book block is also disclosed.

Abstract: A lay-flay book block having a lay-flat pre-converted print stock and a method of making a lay-flat book block are provided. The lay-flat book block includes a stack of pages, a cohesive and a graphic, text or image. Each page includes two sheets of the lay-flat pre-converted print stock that are folded along a centerline which divides the sheet into a first leaf and a second leaf. The fold along the centerline forms a spine. The spines on the plurality of sheets are disposed adjacent one another. The cohesive is configured to be dry during printing and adhere in response to pressure. The cohesive is disposed on a first cohesive face of the first leaf and a second cohesive face of the second leaf. The first cohesive face of one of the sheets is mated and adhered with the second cohesive face of another sheet. The graphic, text or image is printed on the first and second leaves and expands across the centerline.

Abstract: A post-processing apparatus, includes: a restraining unit that restrains a periphery of the back portion of the booklet; a pressing unit that presses the back portion of the booklet restrained by restraining unit so that a curved back face of the back portion of the booklet is formed into a flat back face; an expanding amount judging unit that judges the expanding amount of the booklet in a thickness direction thereof before the pressing operation by the pressing unit; and a relief amount adjusting unit that, based on the judgment result of the expanding amount judging unit, adjusts a deformation amount of the back portion of the booklet in the thickness direction thereof caused by the pressing operation of the pressing unit, the relief amount adjusting unit being located between the restraining unit and the pressing unit.

Abstract: To form a consistent non-application area at an end of a spine of a sheet bundle by adjusting either an application start timing or application termination timing of adhesive through an application device.

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: A peeling sheet on the back of a cover sheet is provided with a cover seal having a printed front surface is peeled off to partially expose an adhesive layer. A core material for cover is placed thereon. First side piece portion and second side piece portion are then peeled off and the entire surface of the first cover members, backbone member and second cover member of the core material for cover is bonded and fixed by the adhesive layer of the cover sheet for cover. Outer circumferential region of the cover seal for cover is then bent to the inside thus making a cover of a booklet. When a personal user edits electronic images and prints the electronic images on a printed sheet, the printed sheet can be fixed easily in a short time for making a booklet.

Abstract: In a bookbinding apparatus, an adhesive applying portion applies an adhesive to an end face of a sheet bundle allowed to stand in the substantially vertical direction, a storage portion that gathers and stores the sheet bundle which is applied with the adhesive and bound in the adhesive applying portion while letting the sheet bundle stand in the substantially vertical direction, transport means for conveying the sheet bundle while letting the sheet bundle stand in the substantially vertical direction from the adhesive applying portion to the storage portion along a substantially vertical transport path, and a cutting portion which is provided on the transport path between the adhesive applying portion and the storage portion, and which cuts an end face of the sheet bundle while letting the sheet bundle stand in the substantially vertical direction.

Abstract: A cutting device that cuts an edge portion of a sheet bundle to an even length, in which a plurality of sheet have been stacked, using a cutting blade, the cutting device includes: a paddle shaft capable of being rotated, which is connected to a drive source provided in the vicinity of the cutting blade; and a plurality of paddles provided on the paddle shaft in a rotary axis direction thereof; wherein the plurality of paddles are arranged in a single line with the same phase as each other on the paddle shaft.

Abstract: The invention is to stabilize an amount of application of a glue to sheets, to stabilize adhesive force between the sheets, and to further improve the productivity of a glued sheet bundle. A sheet processing apparatus includes a processing tray 130 that stacks a sheet discharged by a pair of discharge rollers, an attitude changing unit 150 that displaces the aligned sheet bundle on the processing tray 130 to partially expose sheet surfaces, an adhesive agent delivery device 160 that applies a glue to the exposed parts of the sheet surfaces of the displaced sheet bundle on the processing tray 130, and a sheet bundle aligning portion such as aligning plates 140 and 141 that aligns the glued sheet bundle.

Abstract: A machine and method are provided for making a lay-flat book or album with multiple pages. The machine includes a base with first and second supports. Paper forming the book pages is creased and placed front face down upon the supports and held in position by a vacuum. An adhesive is applied to the back of one page, and then the supports pressed together to adhere the pages together. Hydraulic or pneumatic cylinders move the supports, as controlled by electrical or electronic circuitry in a control panel. Thus, a semi-automatic process is provided for gluing the book pages together.

Abstract: The present invention in one embodiment is a device and method for flattening bottle caps from beverage containers. In a preferred embodiment of the invention, the bottle cap flattener includes a bottle cap positioner, a bottle cap holder, a bottle cap flattening tool, a motor and a positioning jig. The bottle cap positioner precisely locates a bottle cap so that the bottle cap flattening tool can interact with the bottle cap to flatten the bottle cap. The bottle cap positioner preferably includes a rotatable disk that is rotated by the motor. The bottle cap flattening tool applies pressure to a bottle cap through a tip to force the outer portion of the bottle cap into a flattened configuration along with the central portion of the bottle cap. The bottle cap holder applies force to a bottle cap located on the bottle cap positioner to hold the bottle cap in a precise relationship with the bottle cap positioner.

Abstract: Binding element in the form of a U-shaped profile (2) made of a heat-conducting material, which. U-shaped profile (2) consists of a back wall (3) and two standing side walls (4), such that a space (5) is enclosed whereby, in the above-mentioned space (5), on the above-mentioned back wall (3) is provided a layer of glue (6) which melts under the influence of heat, and whereby on at least one of the above-mentioned side walls (4) is provided an end leaf (8), characterized in that in the above-mentioned space (5), at least on the side wall (4) onto which the above-mentioned end leaf (8) is provided, is also provided a layer of glue (7) which melts under the influence of heat.

Abstract: A paper binding apparatus includes: a paper carrying unit which carries papers so as to be sequentially stacked on a tray; a binding sheet supply unit which attaches a binding sheet applied with pseudo-adhesive to a lower surface of one end of the paper first stacked on the tray in the carriage direction so as to protrude in a pectinate shape; a binding sheet attaching unit which sequentially bends a plurality of protruding pieces of the binding sheet so as to be pressed against an upper surface of one end of the carried paper whenever a new paper is carried to the tray; and a discharge unit which discharges a bundle of papers bound by the binding sheet.

Abstract: An improved structure for book cover includes a cover layer, a left positioning plate and a right positioning plate, wherein the left and the right positioning plates are disposed above the cover layer and the edges of the cover layer can be folded inwardly for being adhered or stitched at the edges of the left and the right positioning plates, and the left and the right positioning plates respectively have a protruded left binding portion and a protruded right binding portion which both have plural holes corresponding to each other for fixing loose leaf papers between the left and the right positioning plates directly by a spiral so as to form a book. Through the improved structure of book cover in the present invention, the manufacturing process can be simplified and the cost of labor and material can be saved.

Abstract: A method and system for binding of sheets includes providing an adhesive layer supported on a first side of a backing material. Plural sheets are accumulated against the adhesive layer, and heat is applied to a side of the adhesive layer adjacent the backing material to locally melt only a portion of the adhesive layer in a vicinity of an additional sheet accumulated against the adhesive layer.

Abstract: Provided is a glue wheel arrangement for a printer having an integral page binding arrangement. The glue wheel arrangement is configured to apply glue to an edge of a sheet of paper passing through the printer. The glue wheel arrangement includes a glue wheel and a partially hollow axle connected to the glue wheel, said axle having a rotating coupling for a glue supply hose from a glue cartridge of the printer. The arrangement also includes a housing assembly arranged on the wheel and configured to expose the wheel when urged towards the sheet. A media feed assembly feeds the sheet of paper from the printer past the glue wheel to the binding arrangement.

Abstract: Provided is a method of printing with a print assembly having first and second print engines arranged in an opposing in-line sequential configuration along a paper path. The method includes the steps of drawing a sheet of paper into the first print engine, printing image data onto the sheet via the first and second print engines, printing fixative onto the paper to aid drying of ink, and binding the printed sheet into a document using a binding assembly of the print assembly.

Abstract: An instant book binding system and book cover for rapidly binding single- or double-sided documents, photographs, pages, and other forms of hardcopy media into soft or hard cover books is disclosed. The book binding method using the book cover or system can be performed without special skills or training, and does not require the use of ancillary equipment. The book cover system can be used in conjunction with output on a wide variety of media types, finishes, and stock weights from any type of printer or copier, or with photographs. The finished books retain the appearance and function of conventional mass produced soft and hard covered books.

Abstract: A multiple page article or booklet is disclosed. As disclosed, the multiple page article or booklet includes a plurality of staggered edges providing one or more generally flat staggered edges surfaces. An adhesive band is provided along the staggered edges or staggered edge surfaces to form a seam connecting pages of the multiple page article or booklet.

Abstract: Disclosed herein is a book, comprising a first page, a last page, and a plurality of pages therebetween; a front channel between the first page and the plurality of pages; and a back channel between the last page and the plurality of pages; methods of producing the same; and methods of producing stacks of paper to be used in the book. Also disclosed herein is a stacker, comprising a baseboard; a plurality of page-positioning means; and an adjustable bar.

Abstract: The problem of unevenness that an outer shape is different for each booklet is solved by correcting coating thickness control depending on a thickness of a sheet bundle, based on booklet information which includes information on at least the number of sheets constituting the sheet bundle, keeping adjustment of a coating thickness for adhesive depending on a thickness of a sheet bundle as a basic method.

Abstract: Provided is a bookbinding apparatus including: a conveying unit which sequentially conveys sheets; a gluing unit which glues the sheets conveyed by the conveying unit; a stacking unit which sequentially stacks the sheets glued by the gluing unit; a pressurizing unit which pressurizes glued portions of the sheets stacked on the stacking unit; and a control unit which temporarily stops a stacking process carried out by the conveying unit onto the stacking unit and causes the pressurizing unit to execute a pressurizing process on the sheets stacked on the stacking unit when an operation interrupting event occurs during the stacking process.

Abstract: A bookbinding apparatus includes a coating device for moving relatively to a sheet bundle in the longitudinal direction thereof and for coating an adhesive on the spine of the sheet bundle, a driving device for the relative movement of the coating device, and a control device for controlling the driving device, and according to the thickness of a booklet, changes the number of times of coating of the coating device for one booklet, thereby controls the amount of coating of adhesive.

Abstract: A method for adhesive binding and assembly of text bodies having plural sheets to a cover to form a bound document. Exemplary embodiments include applying an adhesive to a contacting surface of a plurality of sheets of the text body on an individual sheet-wide basis and adhering the plurality of sheets to the cover on an individual sheet-wide base by making line contact between the contacting surface and the cover and by curing the adhesive. Alternatively, the plurality of sheets can be positioned in a stand-off position from the cover and the adhesive can be applied into the gap. A system for binding a text body to a cover to form a bound document is also disclosed.

Abstract: Apparatus and method of increasing adhesion of thermal binder strips to coated papers by conditioning an edge of the sheet by splitting the edge which results in an expansion of the edge followed by compressing the edge so as to reduce or eliminate the expansion. In the case of a stack of sheets, the edge of the stack is conditioned by piercing the edge of the stack and in the case of an individual sheet, the conditioning is carried out by splitting at least a portion of the edge of the sheet.

Abstract: Provided is a wall mountable printer with a glue applicator assembly operatively applying adhesive to a vertical edge of a sheet of printed paper. The printer has a binder assembly including an enclosure chassis, and a powered spike wheel assembly configured to receive the sheet of paper from a print engine of the printer. Also included is an angled platen within the chassis on which the sheet is received from the spike wheel assembly, and a binding platen operatively actuated to bind the sheet onto a preceding sheet positioned on the angled platen. The binder assembly includes a paper sensor to sense a position of bound sheets on the angled platen to facilitate accurate binding of successive sheets.

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: In a coplanar-joined printing carrier of at least two sheet-like partial printing carriers, wherein one of the partial printing carriers has a paper layer, the invention provides that the paper layer of the one partial printing carrier is weakened in its thickness along a marginal strip by removal of a partial layer, the other partial printing carrier has less thickness along one marginal strip than elsewhere, and the two partial printing carriers are joined together along their two marginal strips. Also described are a method especially suited to the making of such a printing carrier.

Abstract: A manufacturing system for manufacturing a personalized photo book includes a computer configured to receive image data from a user, a digital offset printer configured to print a first image on a book page in response to the image data received from the user, a digital silver-halide printer that can print a second, image on a book cover in response to the image data received from the user, and a book binder configured to bind the book page and the book cover to form a personalized photo book.

Abstract: Method and system for permanently fastening an in-line plastic book spine utilizing bind spine tabs. Paper sheets can be formed into an aligned book block. A set of rectangular holes can be configured on binding edges of the paper sheets and book covers. Each bind spine tab can be inserted into the rectangular holes and connected with a binding strip utilizing a mechanical material fastening process, an ultrasonic sealing/welding process and/or a mechanical tab fastening process. The mechanical material fastening process can fasten the book spine together by a stitch or piercing a mechanical material therein. The ultrasonic sealing/welding process can apply ultrasonic waves on the spine tab and the strip to bond together. The mechanical tab fastening process can insert a pre-cut series of mechanical tabs into die-cut slots on a mating side of the book spine.

Abstract: The present invention provides a page for binding in an album. The page includes a blank, printer paper sheet and a hinge strip mounted along an edge of the printer paper sheet, the hinge strip including a flexible line for allowing the hinge strip to bend along the flexible line and a portion for binding to an album. The paper sheet and the hinge strip are adapted to go through a printer together to provide a ready-to-bind printed page.

Abstract: A binder strip cassette including a binder strip roll disposed within a cassette housing, with the roll including a multiplicity of elongated binder strips, each of said binder strips including a flexible substrate and an adhesive disposed on the substrate. The cassette is further provided with a drive apparatus for unwinding the binder strip roll to provide an unwound portion of the binder strip roll together with a separating apparatus disposed within the cassette housing for separating the binder strips from the elongated carrier of the unwound portion of the binder strip roll to produce a separated binder strip. The unwinding by the drive apparatus causes the separated binder strip to be at least partially ejected through a binder strip eject opening in the cassette housing.

Abstract: A bookbinding apparatus which is capable of suppressing volatile components of an adhesive causing abnormal odor from leaking out of the bookbinding apparatus, to thereby reduce discomfort to nearby operators and an operator exchanging a deodorizing filter. The bookbinding apparatus 100 is connectable to an image forming apparatus 101 and carries out bookbinding by bonding a plurality of sheets outputted from the image forming apparatus 101 with the adhesive 300. An adhesive heater 302 heats the adhesive 300 and a temperature sensor 301 detects a temperature of the adhesive 300. An adhesive temperature controller 303 controls a heating temperature of the adhesive 300 by the adhesive heater 302, based on the temperature of the adhesive 300 detected by the temperature sensor 301 and a target temperature.

Abstract: The invention relates to a photo booklet kit. The kit includes at least one booklet cover and at least one bundle of papers. The papers are adapted for printing photos thereon and have a resolution of more than 100 DPI. The cover has a front sheet, a rear sheet and a spine therebetween that is separated from the front and rear sheets by a respective folding line. The spine has a meltable adhesive attached to its inside. The bundle of papers has papers of size that matches the booklet cover. The invention also relates to a method for manufacturing a bundle of papers adapted for use in the kit and to a knife adapted for cutting such a bundle.

Abstract: The present invention is generally directed to an apparatus and method for attaching a cover to an assembly of plural sheets. Exemplary embodiments include first and second clamping components displaceable relative to one another, wherein the first and second clamping components define a first dimension of a sheet receiving volume, and wherein a second dimension of the sheet receiving volume is defined by a sheet stop and a first plane that is orthogonal to the first and second clamping components; and a roller drive for displacing a first roller along the first plane and exerting a force perpendicular to the first plane in a direction toward the sheet receiving volume.

Abstract: Method for thermally binding a bundle of loose leaves in a binding back (4), characterised in that on a side edge (2) of the above-mentioned bundle (1) to be bound is provided a strip of melting glue (3), after which this bundle (1) is placed in the above-mentioned binding back (4) with the side edge (2) with melting glue (3) and this binding back (4) is heated so as to make the strip of melting glue (3) melt, after which the melting glue (3) is left to cool so as to bind the bundle of leaves (1) in the binding back (4).

Abstract: An apparatus is provided for binding a single printed sheet with top and bottom binders to form a single sheet calendar. The apparatus includes a binder feeding mechanism for positioning the top and bottom binders relative to the single printed sheet. The apparatus includes first and second spaced, parallel binding units for respectively securing the top and bottom binders to the single sheet, with the first binding unit having an upper member and a lower member to define a sheet-receiving channel there between. At least one of the upper member or the lower member is heated, and at least one of the upper member or the lower member is controllably movable relative to the other of the upper member or the lower member, to secure one of the binders to the single sheet.

Abstract: A machine and method are provided for making a lay-flat book or album with multiple pages. The machine includes a base with first and second supports. Paper forming the book pages is creased and placed front face down upon the supports and held in position by a vacuum. An adhesive is applied to the back of one page, and then the supports pressed together to adhere the pages together. Hydraulic or pneumatic cylinders move the supports, as controlled by electrical or electronic circuitry in a control panel. Thus, a semi-automatic process is provided for gluing the book pages together.

Abstract: A method for producing adhesive-bound book blocks from gathered signatures for which the individual signatures forming a non-bound book block are supplied while positioned on the spine on a transfer section to an opened conveying clamp on a perfect binder and are subsequently held while clamped in by the closed conveying clamp along the flat outer surfaces. The gathered signatures of a book block are released in an additional conveying section from the conveying clamp in order to be aligned while guided. Prior to leaving the conveying section for aligning the signatures, the signatures are clamped in once more by the conveying clamps along the flat outer surfaces, so that they can be conveyed to further processing locations.

Abstract: Improved lay-flat book products such as a book block (20) are provided which include a plurality of individual, marginally notched, alternating sheets (22, 24) having offset inner binding notches (30, 32); adhesive (36) is applied to essentially fill the notches (30, 32) in order to bind the sheets (22, 24) together. Preferably, tape (38) is applied to the spine surface (34) of the book block (20) and to adjacent portions of the outermost sheets thereof. Hard covers (48) and cloth binding (52) can also be added if desired. In a preferred method, a supply of marginally notched, unprinted A and B sheets (22, 24) are fabricated and the sheets may then be printed using digital equipment (e.g., programmable copiers) followed by adhesive binding. This permits economical production of short-run book products.

Abstract: A peeling sheet on the back of a cover sheet is provided with a cover seal having a printed front surface is peeled off to partially expose an adhesive layer. A core material for cover is placed thereon. First side piece portion and second side piece portion are then peeled off and the entire surface of the first cover members, backbone member and second cover member of the core material for cover is bonded and fixed by the adhesive layer of the cover sheet for cover. Outer circumferential region of the cover seal for cover is then bent to the inside thus making a cover of a booklet. When a personal user edits electronic images and prints the electronic images on a printed sheet, the printed sheet can be fixed easily in a short time for making a booklet.

Abstract: An adhesive application assembly is configured for use in a book binding station that includes a saddle for supporting a plurality of sheets. The adhesive application assembly includes an adhesive applicator, a movable support arm supporting the adhesive applicator, and a drive mechanism. The drive mechanism is coupled with the support arm and is configured to move the support arm and the adhesive applicator toward the saddle to apply adhesive to an outermost sheet on the saddle.

Abstract: The booklet comprises a number of sheets between a cover, and each sheet has a front side and a rear side. At least one data page is provided that is joined to the cover in a fixed manner. The data page comprises a flexible layer and this flexible layer projects with an area out of a data carrier. On this area, the data page is joined to the cover and to the remaining sheets. The flexible layer is flatly joined to at least one other layer, for example, by welding or bonding and is thus inseparably bound without a mechanical joining part.

Abstract: Guide apparatus for forming and applying an over-wrap sheet to a book hardcover including a base unit having a width greater than the width of the hardcover and a length greater than the length of the hardcover, with the base unit including a hardcover receiving area and first and second orthogonal stops supported on the base unit for engaging first and second respective orthogonal edges of a cut over-wrap sheet. Third and fourth orthogonal stops are provided which are supported on the base unit for engaging first and second orthogonal edges of a hardcover placed on the hardcover receiving area.

Abstract: A method of producing perfect-bound printed products formed from several printed products, includes feeding printed products, which are gathered to form loose book blocks, are fed by feeders, which are arranged along a conveying line and are driven at least approximately with synchronous timing, to a conveyance device that has receiving devices that follow one another at regular intervals, and are transferred by this conveyance device into a gluing machine. The gluing machine, which is arranged downstream of the conveyance device and also has a conveying function, is run until it is empty in the event of an interruption of a processing operation by discontinuing further feeding of printed products to the receiving devices of the conveyance device and further feeding of loose book blocks to the gluing machine while the gluing machine is emptying.

Abstract: A binding system consisting of a binding back (3) which is provided with a layer of melting glue (7) on the inside, wherein it comprises at least one end leaf (4) made of a rigid material provided with a flexible strip on at least one edge, which strip is at least partly made of a material which adheres well to the above-mentioned melting glue (7) of the binding back (3).

Abstract: A method and arrangement is provided for producing an adhesive-bound printed item composed of a plurality of printed products. The printed products are gathered into loose book blocks along a first conveying section of a conveying track for a circulating conveyor while positioned transverse to a conveying direction and inclined counter to the conveying direction. The book blocks are then accelerated in an additional section of the circulating conveyor to obtain a larger divisional spacing between the printed products. The book blocks are transferred from the additional section of the circulating conveyor to clamps of a transporter and pivoted to an upright position where one side edge is approximately parallel to the conveying direction. The book blocks are transferred from the clamps of the transporter into respective circulating conveying clamps of an adhesive binder.

Abstract: Provided is a wall mountable printer with a glue applicator assembly operatively applying adhesive to a vertical edge of a sheet of printed paper. The printer has a binder assembly including an enclosure chassis, and a powered spike wheel assembly configured to receive the sheet of paper from a print engine of the printer. Also included is an angled platen within the chassis on which the sheet is received from the spike wheel assembly, and a binding platen operatively actuated to bind the sheet onto a preceding sheet positioned on the angled platen. The binder assembly includes a paper sensor to sense a position of bound sheets on the angled platen to facilitate accurate binding of successive sheets.