Abstract: A booklet stacker to stack multiple booklets each bound with a ring member includes a stack tray on which multiple booklets are stacked, a shifter disposed upstream from the stack tray in a booklet conveyance direction in which a booklet is conveyed, the shifter to adjust a position of the booklet in a width direction perpendicular to the booklet conveyance direction by shifting the booklet a distance shorter than a ring pitch of the ring member in the width direction, and a booklet conveyer disposed upstream from the stack tray in the booklet conveyance direction, to convey the booklet positioned by the shifter to the stack tray.

Abstract: A system and method are provided for forming and implementing book binding geometries as a function of image receiving medium stack thicknesses for automated book binding in image forming devices. The disclosed schemes optimize book binding employing a plurality of strip-like binding elements to form loops in a process that employs heat and pressure to reduce residual stresses in the strips as they are formed into loops. The disclosed schemes mechanically modify a process of bending individual book-binding elements in a manner that more effectively employs less expensive material elements to provide consistent and durable “right-sized” book binding of finished documents. A combination of heat and pressure are introduced with a molded structure that results in controlling a radius of formation to be consistently followed by the “folded” binding elements in order to relieve the stress and preserve the integrity of those binding elements in the finished product.

Abstract: A binding system for binding a set of media sheets using a binding strip and a plurality of pinching devices adapted to fasten together the binding strip and the set of media sheets by pinching them together in their respective spine portions. The binding strip includes a spine portion, a wraparound portion and a fastening portion having a releasable fastening strip. The binding system is adapted to bind the set of media sheets by aligning the spine edges of the set of media sheets and the binding strip, using the pinching devices to fasten together the set of media sheets and the binding strip along the spine edges, wrapping the wraparound portion of the binding strip around the spine edges of the fastened media sheets, and bringing the releasable fastening strip into operative contact with the back media sheet.

Abstract: A sheet binding device binds a sheet bundle by causing a movable-crimping-member moving unit to move a movable crimping member thereby holding a sheet bundle between crimping members. The movable-crimping-member moving unit includes: a link mechanism that includes a first link member rotatably connected to the movable crimping member, a second link member rotatably connected to a fixed member fixed to a device body and connected to the first link member through a connecting part; a connecting member rotatably connected to the connecting part, and capable of moving between a first position causing the link mechanism to be extended and a second position causing the link mechanism to be more flexed than in the first position; and a connecting-member moving unit that includes a rotary member capable of rotating on a displaceable rotating shaft, and reciprocates the connecting member by rotation of the rotary member in one direction.

Abstract: It, as shown in FIG. 11, is provided with a feed roller 31 that is movable, rotates the spiral coil 11 passing through punched holes 3a of the bundle of paper-sheets 3, and guides the spiral coil 11 to feed it toward a coil advance direction, a screw guide 49 at a movable and adjustable side that guides and conducts a forward end of the spiral coil 11 fed by the feed roller 31 toward the coil advance direction into the punched holes 3a thereof, and a control part that receives diameter-of-coil-setting information for setting a diameter of a coil of the spiral coil 11 and controls positions of the feed roller 31 and the screw guide 49 based on the diameter-of-coil-setting information. Such a configuration enables the feed roller 31 and the screw guide 49 to move to the guided positions of the spiral coil 11 indicated by the diameter-of-coil-setting information. Accordingly, it is possible to pass the spiral coils having the different diameters thereof through the holes of the bundle of paper-sheets stably.

Abstract: A wire-bound product using a double type laminated paper board and a method for manufacturing the same are disclosed. The wire-bound product employs a structure in which inner paper sheets are turned over in the rightward and leftward directions on front plates of a frame, instead a structure in which a plurality of inner paper sheets is turned over toward the rear surface of a frame, thereby allowing a user to see both surfaces of the inner paper sheets. Further, rear plates of the frame are inserted into various positions of a spring to support the front plates, thereby allowing a standing angle of the front plates of the frame to be adjustable.

Abstract: A production line including a casing-in machine and a processing section upstream of the casing-in machine. The processing section includes processing stations arranged at clocking intervals along the processing section to process a book block spine. The processing section includes a first processing station group and a second processing station group. The production line further includes a conveyor to successively supply the book blocks in clocked operation to the processing stations. The conveyor includes a first conveying section assigned to the first processing station group, the first conveying section including a first individual drive, and a second conveying section assigned to the second processing station group, the second conveying section including a second individual drive. The production line further includes a control unit operatively connected to the first individual drive and second individual drive to change the clocking interval length along the processing section.

Abstract: A paper-sheet handling device relating to the present invention has a configuration such that a binder paper alignment unit for temporarily reserving a plurality of paper-sheets perforated at predetermined positions, a movement mechanism for binding the bundle of paper-sheets thus aligned owing to the above by means of a binding component, and a binder cassette for storing the binding components for being transferred thereto, wherein the movement mechanism is arranged on the downstream side of the binder paper alignment unit and the binder cassette and also, the binder paper alignment unit and the binder cassette are arranges radially on the upstream side to form an approximately V-shape by making the aforesaid movement mechanism to be a reference.

Abstract: A binding system for binding a stack of sheets with a binding element includes a binding machine having an indicia associated with an operation to be performed in binding the stack of sheets, and at least one binding element having an indicia corresponding to the indicia on the binding machine.

Abstract: A helical plastic coil is used for binding a collated book having a stack of pages with aligned holes along one edge of the book where a leading end of the filament is fed into a first hole at a first end of the book and the coil is rotated about its axis such that the leading end is threaded through the holes by entering each of the holes until the coil is threaded through all of the holes. The leading end of the coil is sheared by an anvil and blade so as to define a leading apex and a leading surface inclined rearwardly from the leading apex along the filament and across the filament. The leading apex is arranged such that, as the leading end enters each of the holes in turn, the leading apex is located on the leading end of the filament at a position thereon facing away from the trailing end of the coil and spaced from the end of the hole facing the first end of the book.

Abstract: The present invention provides a folder binding device including a binding device main body part in which insertion holes are formed into which binding legs are inserted, operating parts which are attached to the binding device main body part in such a manner as to rotate on rotating projections at end portions thereof as fulcrums, and sliding parts adapted to slide on the binding device main body part, wherein the sliding parts are connected to the operating parts via hinge parts in such a manner as to be activated by rotary operations of the operating parts to slide on the binding device main body part, whereby both fastening and unfastening operations of binding legs are made simple and a stable fastening of the binding legs is enabled.

Abstract: A punching processing unit punches holes in a paper bundle delivered from a preprocessing device. A bookbinding unit includes a cartridge for stocking a plurality of rings, and performs a ring binding by binding the paper bundle with the rings. A detecting unit detects an abnormality of a ring in the cartridge. A control unit exchanges a signal with the preprocessing unit each time when detection information obtained by the detecting unit changes. When any one of the rings is determined as abnormal and an execution of ring binding is set, the control unit inhibits the ring binding.

Abstract: A book binding machine includes a book block transport system and a plurality of clamps for clamping stacks of leaves. The clamps are disposed at a distance from each other and are guided in guide tracks of a machine frame. The book block transport system includes a clamp, which is also referred to as a lubrication clamp, having a device for lubricating the guide track. An applicator is assigned to each track roller of the clamp, and the lubricant is transferred to the track rollers through the use of a respective applicator such as a brush. The track rollers transfer the lubricant to contact surfaces of the guide track. A lubrication clamp for a book block transport system in a book binding machine, is also provided.

Abstract: A tape type binding apparatus includes a cutter portion formed in a U-shape inside which a paper staple is held, a paper table formed with a drawing hole through which cutter blades of the cutter portion can be inserted, a pair of pressing members arranged on respective sides of the drawing hole, and a pressing piece arranged below the center of the drawing hole. The cutter blades and leg portions of the paper staple penetrate a stack of sheets placed on the paper table by moving down the cutter portion, the pair of pressing members folds the leg portions of the paper staple to inner sides by moving toward the center of the drawing hole through rectangular holes formed on respective cutter blades, and the pressing piece presses and bonds the folded leg portions by relatively moving up with respect to the paper table.

Abstract: A binder cartridge (51) that can accommodate a large number of binders (61) , which are connected in parallel to each other by an engaging mechanism. A right angle crank-shaped guide groove (55) is formed in a gate portion (54) at the front end of the binder cartridge. A binder in the front row of the binder cartridge is moved by a binder lateral movement mechanism (7) along the crank-shaped guide groove in the lateral direction and is separated from the other binders. A pair of upper and lower pushers (12, 13) of a bind mechanism portion (5) pinch division ring portions of the binder in the vertical direction and insert the division ring portions into a punch hole formed on the sheets of paper.

Abstract: A binding processing apparatus 1 is provided with a punch mechanism 2 and a binding processing mechanism 3 for executing a binding processing by a binder. When a sheet P is fed from a printing apparatus 50 of a copier or the like, the sheet is butted to a stopper plate 9 of the punch mechanism, sheet aligning sliders 10 push both left and right sides thereof to position and punch holes are formed by a punch block 7 and a die 8. Thereafter, the sheet is fed to a sheet tray 15 of the binding processing mechanism, one set of the sheets are aligned and a ring shape binder is pinched by a pusher 17 to fit the ring shape binder to the punch holes of the sheets, and a brochure subjected to a binding processing is discharged to a stack tray 4. A binder cartridge 16 can contain a number of the binders and the binding processing can be executed continuously.

Abstract: A plurality of binding elements, each of a substantially uniform thickness, the fingers being looped over and coupled to the spine such that the inner surface of the fingers is disposed against the inner surface of the spine by an adhesive when assembled. In an embodiment, at least a portion of the outer surface of the binding element is resistant to a more permanent attachment to the adhesive such that the plurality may be stacked together, and successively decoupled or removed for insertion into a stack. The binding elements may include score lines or bends in the fingers to provide a rounded closed loop structure; optional gussets in the bends inhibit straightening of the fingers. The fingers optionally include variations in cross-section along the length to relieve certain stresses to inhibit the looped finger. The binding elements optionally include structure for facilitating interaction with an automating binding process.

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: 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: The invention relates to a method for glue-binding a bundle of paper to form a book, booklet, or similar, by using a band, to be glued to the spine of the bundle, and which extends for a limited distance to the sides of the bundle, and which is intended to shape the bundle. The turning of that part of the band, which extends over the spine, to the side of the bundle, is ensured by using a tool, such as a sheet, under the band, which extends sufficiently to lie on top of the nipping beam already in the area outside of the edge of the band.

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 roll further includes a flexible elongated carrier supporting said binder strips, with said binder strips being disposed along a length of the elongated carrier in an end-to-end arrangement. The cassette is further provided with a drive apparatus for unwinding the rotatably mounted 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 which is elected from the housing.

Abstract: Apparatus for closing a fastener includes a first member adapted to engage and bend a fastener toward a closed position, a second member defining a recessed fastener guide adapted to engage and bend the fastener toward the closed position, the recessed fastener guide being generally aligned with the first member to receive at least a portion of the fastener from the first member, structure for moving the first member, and structure for moving the second member relative to the first member to move the fastener toward the closed position.

Abstract: A binder 10 includes a base 15 formed with through passages 14 that allow binding legs 13 to pass through respectively, movable members 16 which are mounted on this base 15 and located at positions corresponding to the through passages 14 respectively, and an operating section 17 which connects these movable members 16 to each other and operates the movable members 16. Each movable member 16 is provided so as to open/close the respective through passage 14so that, in the state that the through passage 14 is closed, a binding force is given to the binding leg 13. The movable members 16 are synchronously movable between a position where the respective through passage 14 are closed and a position where the same is opened synchronously when the operating section 17 is operated in a predetermined manner.

Abstract: Calendars, posters and the like have slides applied to spaced top and bottom edges in an efficient and cost effective manner without diminishing production output levels nor requiring operator manipulation and involvement. The system includes a first and a second semi-automatic or automatic tinner which are joined together by a conveyor or a similar apparatus for transferring each of the serially processed calendars, posters or the like. Each calendar is processed in the first tinner to have a slide applied to a first or top edge of the calendar or poster. Each one is then serially discharged from the first tinner onto a conveyor in which the leading edge of the calendar includes the slide. The conveyor automatically transfers and reorients each calendar to the second tinner so that upon entering the second tinner, the bottom or opposite edge without the slide is the leading edge. The second tinner applies a slide without operator involvement or manipulation.

Abstract: A stack of pages is bound along a first edge thereof to form a book using an adhesive having a melting temperature and an elongated strip having an adhesive atop at least a portion of a first side. The strip has two opposed ends and an electrical resistivity between the ends and is dimensioned to substantially cover the first edge of the stack, with the first side against the first edge of the stack. An electrical current is introduced to pass along the strip between the ends. The current should be sufficient to create enough heat in the strip to achieve a temperature at least as great as the melting temperature, enabling the melted adhesive to bind the stack of pages together along the first edge. Apparatus are also provided for supporting, holding, and clamping the page stack prior to and during the binding process.

Abstract: A binder 10 comprises a base 15 formed with through passages 14 that allow binding legs 13 to pass through respectively, movable members 16 which are mounted on this base 15 and located at positions corresponding to the through passages 14 respectively, and an operating section 17 which connects these movable members 16 to each other and operates the movable members 16. Each movable member 16 is provided so as to open/close the through passage 14 so that, in the state that the through passage 14 is closed, a binding force is given to the binding leg 13. Each movable member 16 is provided movably between a position where each through passage 14 is closed and a position where the same is opened synchronously when the operating section 17 is operated in a predetermined manner.

Abstract: A method of binding folded signature sections together into a book comprised of a signature comb element having teeth which are inserted through perforations in the fold of the signatures and the teeth having tabs which secure the signature comb in slots between two or more spine tapes. The spine tapes adjustably lock into the hinge of the covers by a tooth and pawl mechanism, further interlocking one or more signatures to the spine of the book and securely fasten together the signatures and book cover.

Abstract: A method of manufacturing a file folder includes the steps of displacing a predetermined length of a flexible material in a feed direction and forming a pair of spaced apertures in the material. The method further includes the steps of inserting a prong of a binder through each aperture, the binder having an elongate central portion with a prong extending from each end of the central portion and securing the central portion of the binder to the material. The invention also relates to an apparatus for manufacturing a file folder.

Abstract: The present invention relates to an apparatus for binding a number of sheets forming a stack along one of their edges by means of an essentially U-shaped deformable channel. The apparatus has a support for depositing horizontally the sheets to be bound, and having above the support a pressure applying device which is operable to deform the deformable channel and includes an actuating lever by means of which the pressure applying device is movable from an inoperative position into an operative position; to be able to use the apparatus universally and deform narrow and wide channels alike with optimum results, the apparatus is configured such that the pressure applying device is carried by a pivotal supporting structure and the pressure applying device is mounted for rotation on the supporting structure, wherein both the pressure applying device and the supporting structure are operable by means of the actuating lever.

Abstract: A clipping apparatus is provided which comprises a cartridge (100) for containing a plurality of substantially flat clipping members arranged in a pile, a delivery mechanism (30) for taking out one of the clipping members contained in the cartridge (100) and delivering the clipping member to a clipping position (13) where an end of a sheet member is clipped, and a clamping mechanism (50) for bending the clipping member (105) delivered to the clipping position (13) and fastening the end of the sheet member (S) inserted in the clipping position (13) with the clipping member (105) while holding both ends of the clipping member (105).

Abstract: A manual binder for affixing a slide to the margin of a calendar or the like. The binder crimps a slide located between first and second crimping members upon the margin of a calendar. The slide and calendar are held by the first and second members and a third crimping member forms a bend in the slide. The slide and calendar are repositioned between the first and second members and the bend formed by the third member is crimped closed upon the calendar.

Abstract: A method and an apparatus for manufacturing book blocks from various printed sheets composed of a plurality of quarto sheets which are inserted into one another, wherein the printed sheets are successively pulled fold first along a conveying path from a stack of printed sheets by a gripping unit of a feeder and are subsequently gathered with their flat sides placed against each other into book blocks. The gripping unit which grasps the printed sheets approximately at the fold thereof produces a deformation or injury which extends at least partially through the quarto sheets, so that the respective quarto sheets are secured relative to each other and displacements relative to each other are prevented.

Abstract: A binding machine is operable to hyper-deflect the rings of a binding element against non-planar surfaces to achieve an advantageously forward presentation of free ends of the rings for ergonomic and convenient insertion of a perforated stack of sheets. An embodiment of the binding machine has a base, a plurality of stationary hooks fixed to the base, and a comb member which is pivotally mounted to the base. The comb member may be fixed to a shroud which is mounted to effect the pivotal movement of the comb member. Additionally, this shroud may be axially shifted. When the binding element is supported against the comb member, the axial and pivotal motions of shroud respectively cause (1) engaging of rings of the binding element with the stationary hooks and (2) uncurling deflection of the rings.

Abstract: A binding device for crimping or deforming a U-shaped channel around a plurality of sheets of paper comprises a stationary crimping bar and a rotatable crimping bar rotatable coupled above the stationary crimping bar. The rotatable crimping bar has coupled thereto a first weight member fixedly coupled in the center thereof wherein the first weight serves to provided a centralized force of gravitational pull to urge the rotatable crimping bar toward a crimping position. The stationary crimping bar has coupled thereto a second weight member fixedly coupled in the center thereof wherein the second weight member provides a centralized force of gravitational pull for stability.

Abstract: An apparatus for binding documents utilizes generally U-shaped or C-shaped resilient slip binders. A hopper device feeds the slip binders from its reservoir to a buffer conveying device which supplies an insertion module with the slip binders. The binding apparatus is design for use in a high speed electronic publishing system.

Abstract: A method and apparatus for binding books wherein a stack of pages are collated and aligned together. This stack is covered, top and bottom, with end pages which now comprise the first and last pages of the stack. Each end page includes a self-adhesive or sticky-back surface that is temporarily covered with a protective sheet. This stack is inserted within a clasp that is subsequently crimped, thereby securely binding the stack together. The crimped stack is then placed within an outer case or covering whereupon the protective sheet is removed and adhesive is exposed and applied to the case in order to secure or bind the pages to the case. Final compression of the case insures proper adhesion.

Abstract: An apparatus for use with xerographic equipment or the like automatically applies a plastic U-shaped spline binder strip from a cassette housing a plurality of strips onto a first edge of a document set clamped to a planar surface. A binding strip cassette storage holds a plurality of binding strips for single-file automatic installation onto a series of document sets generated by the xerographic equipment. A spreader member disposed between the cassette storage and the document set opens finger portions of the binding strip as it translates from the cassette and onto the document set.

Abstract: A bindery system captures pages of a bound or unbound book in a hard or soft cover case with a metal U-shaped channel which in turn is bonded to the inside spine surface of the hard or soft covers.

Abstract: A bindery system captures pages of a bound or unbound book in a hard or soft cover case with a metal U-shaped channel which in turn is bonded to the inside spine surface of the hard or soft covers.

Abstract: A portable book binding apparatus is disclosed which includes a platform mountable on a support surface. The platform includes an elongated channel being sized and shaped to receive an elongated resilient binder clip. Resilient guiding and spreading fingers are mounted adjacent to and protrude into the entrance of the channel so as to spread the end portions of clip legs of the binding clip when the clip is inserted into the channel. A sheaf of papers is slid along the channel, pass the fingers and between the spread apart clip legs for final positioning within the binder clip.

Abstract: A file folder including a base having two stripes formed on one edge and folded such that the outer stripe contacts the base, an opening formed in the middle portion of a middle stripe, a clip including a panel engageable on a lower portion of the base and another panel insertable into the opening of the middle stripe for clamping the outer stripe and the base together in order to hold sheets of paper between the outer stripe and the base.

Abstract: A book binding apparatus and method secures pages of a document in a U-shaped channel. The apparatus automatically adjusts the binding jaws of the apparatus to the current size of the channel prior to the binding force being applied to the channel. The operating forces generated by the apparatus in deforming the channel are limited by generating small amounts of deformation in the channel for each pull of an operating handle, and by using multiple pulls of the handle to completely secure the pages into the channel. A debinding apparatus and method, using the same mechanism as the binding apparatus, debinds the pages from the channel.

Abstract: A bindery system captures pages of a bound or unbound book in a hard or soft cover case with a metal U-shaped channel which in turn is bonded to the inside spine surface of the hard or soft covers.

Abstract: This is a booklet binding system which includes an elongated closure unit specifically constructed and arranged to be removably inserted between the two rows of opposed spaced apart loops of a wire loop binding unit, wherein the closure unit defines a pair of spaced apart loop receiving grooves specifically oriented and arranged to receive the two rows of loops to interlock therewith and provide the desired closure therebetween.

Abstract: A bindery system captures pages of a bound or unbound book in a hard or soft cover case by crimping a metal U-shaped channel which is bonded to the inside spine surface of the hard or soft covers.

Abstract: An apparatus which adhesively binds a set of sheets by applying a strip having an adhesive on one surface thereof to the spine of the set. The strip is supported on a heated platen which softens the adhesive. The spine of the set of copy sheets is pressed into the adhesive on the strip. The depth of penetration of the spine into the adhesive is controlled so as to form a layer of adhesive between the spine and the strip having a predetermined thickness. As the spine of the set of copy sheets is moved into contact with the adhesive on the strip, it is damped to absorb a substantial portion of the kinetic energy of the set of sheets to reduce the deflection and distortion of the set of sheets.

Abstract: An apparatus and cartridge for use in binding prepunched sheets into a booklet using curled-finger ring-type edge binders. The binders include an opening tool which is drawn through the binder for spreading curled binder finger from the binder spine to form a document receiving gap. Binder/tool combinations are carried in the cartridge which includes a binding position or slot. The cartridge is to be positioned in an apparatus having a recessed base for receiving the cartridge and a cover which includes a paper receiving slot. The base defines a slot for alignment with the cartridge binding position slot. In the opened position, the terminus of the cover slot is aligned with the base slot. When the cartridge is in position and the cover opened, a booklet can be formed at the binding position by a binder being opened, apertured paper deposited in the cover slot and binder, and removal of the opening tool to permit the binder to close on the apertured paper.

Abstract: There is disclosed herein an apparatus and method for binding prepunched and apertured materials together with a curled-finger ring-type edge binder using an elongated tool. The tool includes leading, intermediate and trailing sections. The leading section is longer than the binder, but not as wide. The intermediate section which uncurls the fingers taperingly joins the leading and trailing sections. The trailing section is longer and wider than the binder, holds the fingers open, aligns the prepunched paper relative to the fingers and can form an upwardly-facing paper receiving gap. The back end of the trailing section is transverse to the longitudinal axis of the tool for releasing the fingers so as to allow each finger to release its potential energy, extent or snap through the aperture and thus bind the paper together.

Abstract: A slide file is disclosed, which comprises a file cover, a file board, a slender file base to which the respective one side end of the file cover and the file board are adhered, and an elastic slider with a sideways U-shaped transverse section extrapolated on the file base slidably in the width direction of the base and having upper and lower plates for opening or closing a paper clip portion communicated with a bonded portion of the file cover.

Abstract: A cover for protecting and supporting a plurality of sheets bound together with a pressure-sensitive adhesive tape and bound to the cover by the tape. The cover has a binding area and a protective coating in that area where the binding tape has an adhesion force of between 200 and 700 grams per 1.27 cm width of tape according to a standard adhesion peel test. The coating may be an actual coating of low adhesion material, a film, a coated plastic film, or the cover material. The cover may include a sheet folded centrally, a truncated cover to afford attachment of a separate cover sheet, or the cover may be formed to cover only the front or back of the documents to be bound thereon.