Abstract: A multi-stroke fastening device comprising a housing, a fastener drive track carried by the housing, a striker assembly guide track mounted within the housing, a striker assembly mounted in slidable relation within said guide track, a power drive assembly, and a feed mechanism. The striker assembly includes a driver member constructed and arranged to strike a fastener disposed in the fastener drive track. The striker assembly is constructed and arranged to be moved along the guide track through a plurality of alternating drive strokes and return strokes to effect a plurality of impacts of the driver member upon the fastener in order to drive the fastener into the workpiece. The striker assembly has a substantially constant drive stroke lengths relative to the guide track.

Abstract: A stapler comprises a removable cassette, which contains a strip of staple blanks, and an advancing mechanism, which is arranged to advance the strip and which, to this end, has a feeding plate, which engages one flat side of the strip. The advancing mechanism comprises elements, which are arranged to interact with the removable cassette to move the feeding plate, during an initial phase of the cassette's removal from the stapler, to a neutral position, in which it has been disengaged from the strip, and to move the feeding plate, during a final phase of the reinsertion of the cassette or the insertion of a similar cassette into the stapler, to an engagement position, in which it engages the strip.

Abstract: A stapler magazine and a stapler apparatus which do not require an initial feeding action for advancing a staple to a stapling position immediately after the staple magazine is mounted in the stapler apparatus. The staple magazine has a case for accommodating a rolled staple assembly, and a roller that comes into contact with a portion of the roller staple assembly and feeds the leading edge of the staple assembly to a preselected position in the stapler apparatus. The stapler apparatus has a roller guide that comes into contact with the roller of the staple magazine when the staple magazine is mounted in the stapler apparatus. The roller is automatically driven by the roller guide in response to insertion of the staple magazine in the stapler apparatus. The stapler apparatus may have a feeding device for feeding the leading edge of the rolled staple assembly in response to the insertion of the staple magazine in the stapler apparatus.

Abstract: A stapler comprises a removable cassette, which contains a strip of staple blanks, and an advancing mechanism, which is arranged to advance the strip and which, to this end, has a feeding plate, which engages one flat side of the strip. The advancing mechanism comprises elements, which are arranged to interact with the removable cassette to move the feeding plate, during an initial phase of the cassette's removal from the stapler, to a neutral position, in which it has been disengaged from the strip, and to move the feeding plate, during a final phase of the reinsertion of the cassette or the insertion of a similar cassette into the stapler, to an engagement position, in which it engages the strip.

Abstract: An electric nailing tool comprises a housing, a nail magazine for supplying nails, a spout attached to the nail magazine and having a passage communicated with the housing, a solenoid set, and a hammer. The solenoid set comprises at least two solenoids having a common through-hole for receiving the hammer. A percussion member is securely attached to an end of the hammer to move therewith, thereby driving a nail in the passage out of the spout upon percussion movement of the hammer. The solenoids are energized and de-energized in sequence to move the hammer back and forth along the common through-hole of the solenoids, thereby providing at least two impacting motions by the percussion member to the nail in the passage.

Abstract: A stapler is provided that does not waste any staples when a staple cartridge or sheet of staples is replaced. The stapler includes a sheet of staples, a mounting unit equipped with a cartridge for housing the sheet of staples and a driver mechanism that draws out the sheet of staples from the cartridge. The mounting unit has a reverse motion stopping mechanism that prevents the sheet of staples from moving back into the cartridge. The reverse motion stopping mechanism makes contact with the sheet of staples when the mounting unit is installed and the reverse motion stopping mechanism releases contact with the sheet of staples when the mounting unit is removed.

Abstract: A cartridge is provided that reliably feed staples even when the sheet of staples is completely unraveled. A shaft is established in the housing unit for the cartridge as a mechanism for forming a space. The shaft is not centered inside the round housing unit but is instead off-center. In other words, the shaft is located beneath the center line of the housing unit. Also, the shaft is located completely inside the hollow cavity formed by the rolled sheet of staples. As a result, the sheet of staples does not come into contact with the interior walls of the housing unit even when the rolled sheet of staples is unraveled.

Abstract: A stapler is provided that consistently remove only jammed staples from the stapler. Guide grooves are formed in a guide unit of a cartridge, and the guide grooves support a sheet of staples. Stoppers are formed on the edge of the walls of the guide unit to block the ends of the guide grooves. Release holes that open upwardly are formed in the guide grooves in front of the stoppers. Because a jammed staple protrudes from the release holes, the jammed staple can be pulled out from the release holes using the fingers. As a result, jammed staples can be effectively removed from the stapler.

Abstract: A driver unit of a vertically slidable type is constructed by mounting a staple cartridge to a cartridge holder so as to freely slide in a vertical direction, and by urging the staple cartridge toward a clincher unit opposed thereto by a spring. When a clincher sleeve has descended to push the staple cartridge, the staple cartridge will move up and down in parallel, and accordingly, a relative angle of a clincher to a driver plate will not change.

Abstract: A staple cartridge which is composed in order to guide a leading end 20a of a replacing roll staple 20 provided with a binding band 21 to a guide path 12 with pulling out a leading end of the binding band 21 from a front portion 11 of an openable and closable lid 2 to load the roll staple 20 and with rotating the roll staple 20 in a staple loading room 6 in a state in which the lid 2 is closed. Roll abutment portions 10 are arranged on the inner surface 2a of the staple loading room 6, the roll staple 20 which is located between the roll abutment portions, are rotatably held by them striding an adhesive portion A to prevent a contact between the inner surface 2a and an adhesive portion A which has an adhesive material.

Abstract: A motor-operated stapler capable of narrowing the range of a home position zone of a cam, is provided. The motor-operated stapler includes a driver 36 which reciprocates and drives out a staple toward a sheet bundle and a drive-out mechanism 30 which causes the driver 36 to operate. A driver cam 32 is mounted on a driving shaft 31 in the drive-out mechanism 30 and the driver 36 is reciprocated once by rotation of the driver cam 32. A brake mechanism 60 is used which applies a brake mechanically to the rotation of the driving shaft 31 when the driver 36 returns to its home position.

Abstract: A motor-operated stapler is disclosed which, when a bundle of sheets to be stapled is thin, prevents staple leg portions once inserted through the bundle of sheets from again piercing through the sheets bundle and which, in the case of a thick bundle of sheets, bends staple leg portions sufficiently to staple the bundle of sheets to a satisfactory extent. In the motor-operated stapler, a clincher base which carries a bundle of sheets thereon is supported by a housing of a magazine which pushes out a U-shaped staple downward, the bundle of sheets is pinched by both the clincher base and the magazine, the U-shaped staple of pushed out from the magazine into and through the bundle of sheets, and a pair of leg portions of the staple thus projected from the bundle of sheets are bent by a pair of clinchers installed on the clincher base.

Abstract: A staple cartridge including a storage portion and a staple feeding passage. The storage portion stores a connected staple constituted by connecting a large number of straight staples. The staple feeding passage is for feeding the connected staple stored in the storage portion. A stopper is protruded to an inside of the staple feeding passage for preventing the connected staple from being moved to a discharge side. The stopper is formed on both sides of a discharge port provided on a tip of the staple feeding passage.

Abstract: A cartridge body 602 is formed with a receptacle chamber 603 for accommodating sheet staples ST therein in a stacked state and is also formed with a drive-out passage 601 for driving out the sheet staples ST, and within the cartridge body 602 is provided a plate spring member 650 as a pushing means for pushing the sheet staples ST stacked in the receptacle chamber 603 toward the drive-out passage 601.

Abstract: In a stapler device wherein a head section 51 for driving a staple into a sheet stack and an anvil section 61 for receiving and bending the staple driven from the head section 51 are independent from each other and movable in a sheet-width direction of the sheet to be passed therebetween, the head section 51 and the anvil section 61 respectively include holders 52, 62, which are respectively guided by support shafts 81, 82 and drive shafts 72, 73, and a staple-driving unit 56 and a staple-receiving unit 65, which are detachable from their respective holders 52, 62.

Abstract: A cover mechanism in a cartridge for an electric stapler comprises a movable wall, a cover body, and securing mechanism. The cartridge includes a storage portion for storing piled-up sheet-like staples each having linear-shaped staples connected together in a sheet shape. The movable wall is formed on a side wall of the storage portion and capable of swinging inwardly and outwardly. The cover body is disposed over an opening of the storage portion for insertion of the sheet-like staples and includes a covering portion. The covering portion of the cover body covers an outside portion of the movable wall and is respectively formed on two sides of the cover body. The securing mechanism secures together the covering portion of the cover body and the movable wall. Secured state between the covering portion of the cover body and the movable wall is removed when any sheet-like staples do not remain within the storage portion.

Abstract: A powerized stapler device is disclosed including an electromagnet, preferably a solenoid, having a armature which is adjustable relative to the solenoid such that the permeable portions of the armature, in the non-energized condition of the solenoid, may be adjusted relative to the solenoid enabling the force exerted by the solenoid to be varied as a function of the initial position of the armature. In a further preferred embodiment, an extension of the armature is engaged with the stapler head whereby movements of the armature relative to the electromagnet also function to vary the space between the stapler head and the stapler anvil, adjustments to process thin work pieces functioning to reduce the spacing between stapler head and anvil as well as reducing the driving force exerted by the electromagnet.

Abstract: An improved fastener driving tool is provided that is especially adapted to the application of fasteners in trim applications, such as the fastening of wood trim and decorative pieces. The preferred embodiment is a combustion tool, and includes an incrementally adjustable fastener driving depth setting mechanism. The incremental control permits an operator to select from a number of discrete depth settings over a limited range. The preferred tool also includes a distance amplifying fastener lockout. The lockout amplifies a fastener follower movement permitting the blocking of movement of a linkage necessary to tool operation in response to the movement associated with an individual small fastener being dispensed. A trigger and handle of the preferred tool are proximate to the driver blade axis, and the trigger is disposed within an imaginary extension of a fuel canister held within the tool housing.

Abstract: A motor driven stapler has a holding mechanism for holding parts of the legs of a staple penetrated and projecting from a pile of sheets. The parts of the legs of the staple penetrated and projecting from the pile are clinched by a clinching plate after holding the same by the holding mechanism.

Abstract: The present invention provides an apparatus capable of selectively stapling one of opposite corners of the sheets, as well as a side of the sheets.

Abstract: An electrically powered stapler is disclosed having a sliding blade for driving staples which is reciprocated by a lever and crank mechanism driven by an electric motor through a torque increasing gear train. Jamming of the stapler is prevented by mounting the lever's fulcrum on a plunger which is releasably retained to a fixed support by a flexible collar. The plunger has an enlarged head, and the collar has a plurality of flexible fingers which grip the plunger behind the head to retain the plunger to the collar. The plunger can be disengaged from the collar by the application of a predetermined force directed away from the plunger, such as occurs on the fulcrum during a jammed condition when the blade cannot drive a staple and is stalled. The pivot point of the lever then shifts to the blade end of the lever and the plunger is reciprocated by the lever instead of the blade, allowing the motor and other components to cycle through their full range of motion without stalling.

Abstract: A stapling attachment is positioned on a movable carriage. The stapling attachment can be pivoted relative to the carriage. At a predetermined position of the travel path of the carriage a capture mechanism engages a bolt disposed eccentrically with respect to a pivot axle of the stapling attachment. The stapling attachment is automatically pivoted into an oblique position through the reverse movement of the carriage so that a staple may be inserted at an oblique angle of a sheet stack.

Abstract: A simple type power stapler has a main body 1, a punching arm 2, a housing frame 3, a hanging means 8 having a hook member 81 engaging with an upper portion of the punching arm 2 and a support portion 80 for supporting a lower portion of the housing frame 3, and a pushing member movable vertically by a motor 5 wherein a pair of support frames 22 are provided above the punching arm so as to accommodate the vertically movable pushing member; the punching arm 2 and the housing frame 3 descend by their own weight to lower their front end side F so that a lower surface 32 of the front end of the housing frame 3 pushes an upper surface of an object to be stapled W when the pushing member is moved downward; and the distance between the hook portions 81 and the support portion 80 of the hanging means 8 is determined to have a dimension which allows the downward movement of the front end side F of the punching arm 2 caused by the movement of the pushing member to its lowest position whereby staple pins P are punched o

Abstract: A driver unit for an electric stapler comprises: a frame; a driver support member vertically movably mounted on the frame; a driver having a plate-like shape, fitted to the driver member such that the driver is vertically slidable in a predetermined range with respect to the driver support member; a driver hoist mechanism for driving the driver support member, driven by a motor to lower from an upward standby position to eject a staple to clinchers arranged right below the driver; and a vertical position adjusting mechanism provided between the driver support member and the driver, for adjusting a vertical position of the driver with respect to the driver support member.

Abstract: In the left-and-right-direction center of the bottom portion of a staple loading chamber 5, there is formed an opening 6, the left-and-right-direction central portion of the upper surface of a staple guide table 7 is exposed through the opening 6, and on the two left and right sides of the opening 6, there are formed staple guide grooves 9L and 9R which respectively communicate with the staple guide table 7. A belt with a tab portion is bonded to and wound on a roll staple. If the roll staple with the belt is inserted into the staple loading chamber 5, a front lid 2 is closed and the belt is pulled forwardly while holding the tab portion thereof, then the belt comes loose, so that the front portion of the roll staple is guided into the staple guide grooves 9L and 9R and is then fed to a position located in front of the staple guide table 7. If the tab portion of the belt is pulled further, then the belt is peeled off the front portion of the roll staple, which completes the loading of the roll staple.

Abstract: In a staple clinching mechanism in a stapler wherein legs of a staple driven in by a driving mechanism are bent in a first direction after the legs of the staple are passed through stacked work sheets, the staple clinching mechanism includes: a pair of movable clinchers; and a pair of curved bend guiding surfaces, for guiding bending the legs of the staple while the movable clinchers are bending the legs of the staple, wherein one of the bend guiding surfaces is inclined in a second direction perpendicular to the first direction.

Abstract: An electric stapler to bind a set of sheets with staples, is provided with a cartridge to hold the staples, a magazine to guide the cartridge in the direction of the front surface of the set of sheets, a drive motor to contact with and separate from the magazine in relation to the set of sheets, a reduction means to reduce and control angular velocity of the drive motor, and a driver plate to drive down the staples into the set of sheets through the driving force of the drive motor, performs a series of binding processes in a short time with reducing impact caused by the magazine.

Abstract: An electric nailing gun powered by either A.C. or D.C. and utilizes T-shaped nails. A hammer motivated by a dual spring mechanism is compressed by a mechanical system comprising an electric motor driving on one end two cog wheels, a cam, and a pivoting lever to compress the dual spring mechanism. The opposite end of the motor has a rotating scooper plate which catches a knob on the hammer to compress and release the compressed hammer to drive in the T-shaped nails from a bar of nails in a magazine.

Abstract: Stapling devices, which form staples from a staple wire transported from supply rolls, are arranged in a stapling apparatus. The supply rolls are associated with a threading-in device which is mounted displaceably on the stapling apparatus. Transport mechanisms as well as feed-in and guide mechanisms are associated with each supply roll. Flexible guide tubes connect the threading-in device to the respective stapling device. The threading-in device can be moved into a position pulled out of the stapling apparatus device, in which the supply rolls can easily be inserted. The leading end of the wire is pushed, in simple and conveniently visible fashion, between a transport roller pair by way of a guide element and a funnel-shaped feed-in tube.

Abstract: In the course of the upward turning movement of the magazine, the lowermost sheet of staples is taken from the staple cartridge as the feeding member is slidably displaced in the forward direction. Since the thrusting force given by the tension spring is sufficiently larger than the frictional resistance present between the lower surface of the lowermost sheet of staples and the feeding member, each sheet of staples can be more reliably taken from a staple cartridge. As the magazine is turned in an upward direction, a feeding member is displaced in the forward direction by the resilient force of a tension spring, and a contact portion on the feeding member comes in contact with the rear end of the lowermost sheet of staples.

Abstract: A cartridge used for an electric stapler is provided which comprises a cartridge body (701) containing a pile of sheet-staples (S), a delivering portion (710) mounted on an upper end of a front wall (701F) of the cartridge body (701) and having a delivery path (711) along which the sheet-staple (S) is delivered, and a driving-out portion (720) mounted in a front end of the delivering portion (710). A reciprocating driver enters the driven-out portion (720), so that a U-shaped staple is driven from the driven-out portion (720). The driver enters the driving-out portion 720 from above the delivery path (711).

Abstract: In a stapling device capable of automatically inserting one or more staples into piled sheets discharged from an image producing device or the like to bind the sheets, a staple driver unit for inserting the staple into the sheet and a clinching unit for bending the leg parts of the staple piercing the sheets are opposed to each other astride a sheet passage and operated to perform stapling by a simple stapling drive having a single power source. By operating the staple driver unit and the clinching unit by the single power source, the precise and stable stapling operation can be carried out with exquisite timing without using a high-level controlling system.

Abstract: An adjustable twin stapler device has a base, a platform disposed on the base, a cover covering the platform, a first electric stapler disposed between the platform and the cover, a second electric stapler disposed between the platform and the cover, an electric circuit board, and an adjusting device disposed between the base and the platform. A push plate is disposed on the cover. The platform has a bottom plate. A first and a second columns are disposed on the bottom plate. The electric circuit board is disposed on the first and the second columns.

Abstract: An electric stapler has a stapling mechanism which is connected to a power source through a switch and staples a sheet stack inserted into a throat. An actuator is adapted to abut against an edge of a sheet stack at a plurality of positions along the edge of the sheet stack and to be moved by the sheet stack in response to insertion thereof to an operative position where it operates the switch to actuate the stapling mechanism. A sub-actuator is positioned in front of the actuator and is movable between an erected position where it stands into the sheet stack insertion passage to abut against a sheet stack when the sheet stack is inserted into the throat and a horizontal position where it is retracted from the sheet stack insertion passage not to abut against a sheet stack.

Abstract: An electric stapler in which sheets conveyed along the sheet guide surface are staplied in a stapling position on a sheet guide surface, the electric stapler comprises: a switch; a staple unit for stapling the sheets in the stapling position in response to the switch; a first actuator protruding in part from the sheet guide surface, wherein, when the first actuator brings into contact with more than one place of one edge side of the sheets conveyed beyond the stapling position and moved by the sheets being conveyed, the first actuator actuates the switch so as to operate the stapling unit; and a second actuator positioned upstream the first actuator, a part of the second actuator selectively projecting and retracting with respect to the sheet guide surface, wherein, when the second actuator brings into contact with predetermined lengths of different edge sides constituting a corner portion of the sheets being conveyed beyond the stapling position while the part protruding from the sheet guide surface and move

Abstract: A feed roller 32 is disposed in a magazine section 1 such that the feed roller 32 is in press contact with the lower side of a sheet-like staple fed out of a cartridge 13. A rack is formed in the support means of the magazine section 1. The feed roller 32 is operatively coupled with the magazine section 1 through a one-way clutch gear 34 in mesh with the rack 33. Only when the magazine section 1 separates from the clincher section 4, the one-way clutch gear 34 operates to rotate the feed roller 32 in the staple supply direction. The rotation of the one-way clutch gear 34 can be adjusted by a gear ratio of the combination of the one-way clutch gear 34 and the rack 33. Therefore, a sufficient quantity of feeding the sheet-like lowest staple is secured. The feed roller 32 is rotated by utilizing the forward/backward motion of the magazine section 1 with respect to the clincher section. Therefore, provision of any special drive means for rotation is not required.

Abstract: An electric stapler is provided which comprises a stapler body (10) having a driving-out portion (720) and a driver (321) for driving a staple from the driving-out portion (720) into, for example, sheets of paper while reciprocating. The stapler body (10) includes a table (100) which reciprocates in conjunction with a driving mechanism by which the driver (321) is reciprocated. The sheets of paper are held between the table (100) and the driving-out portion (720) when the table (100) reciprocates. Clinchers (401, 402) are disposed on the table (100). The clinchers (401, 402) clinch the ends of the staple which is driven by the driver (321) and has passed through the sheets. After the sheets of paper are held between the table (100) and the driving-out portion (720), the driver (321) drives the staple into the sheets, and the clinchers (401, 402) are then actuated.

Abstract: An electronically controlled pneumatic fastener driving tool. The tool is of the type having a body containing a cylinder with a piston/driver assembly therein, a firing valve actuable to introduce high pressure air into the cylinder to cycle the piston/driver assembly, a manual trigger, a safety trip, and an electronic control system. The electronic control system comprises a remote solenoid valve to actuate the firing valve, a microprocessor having inputs from at least the trigger and safety trip and an output to energize the solenoid of the remote valve to cycle the tool, a battery to energize the microprocessor and a rechargeable battery to energize the solenoid of the remote valve. The microprocessor determines the mode of operation of the tool and may be designed to provide two or more modes selectable by a mode selection switch. The input from the trigger is provided with a reed switch closable by the trigger and the input from the safety trip is provided with a reed switch closable by the safety trip.

Abstract: An electric stapler is provided which comprises a driving plate (7) for driving out a staple from a driving position while reciprocating, a delivering mechanism for delivering a sheet-staple (11) to the driving position interrelatedly with a reciprocating motion of the driving plate, a working piece (24) which is rotated by a push given by a staple occupying the front row of the sheet-staple (11) when the front staple reaches the driving position, and a sensor (25) for detecting the rotation of the working piece (24). The driving plate (7) returns to its initial position in accordance with a detection signal output by the sensor (25).

Abstract: A staple refill cartridge for an electric stapler via a cartridge is releasably attached to the electric stapler and made of paper for replenishing sheet staples formed by uniting straight staples together in sheet form, and the refill cartridge includes: two lateral wall portions; a rear wall portion formed between the two lateral wall portions into a continuous body; and an overlapping piece having substantially the same size as the rear wall portion, the overlapping piece being overlapped inside the rear wall portion, wherein a corner portion is formed by each of the two lateral wall portions and each of both lateral ends of the overlapping piece.

Abstract: A power stapler in which the electromagnetic valve has a movable annular metal block which moves downwards to prevent the occurrence of a high striking noise when attracts the valve rod to strike the striking plate; the guard plate which stops staples in the magazine can be alternatively adjusted to the closed position to close the front end of the magazine, the open position to open the front end of the magazine for the loading of staples, or the mid-way position to partially close the front end of the magazine for permitting jammed staples to be removed from the magazine.

Abstract: A pistol-configured, solenoid driven wire cutting and seating tool is connectable by way of a standard power cord to an AC voltage source and is used to seat and cut a wire by squeezing a trigger that operates a solenoid control circuit. The tool has a pistol-shaped grip and a generally cylindrically shaped barrel having a main barrel body and a nose portion. The solenoid has a bore adjacent to a butt region of the barrel, coextensive with a longitudinal axis of the barrel and accommodating the translation of a solenoid plunger. A solenoid plunger extension hammer extends from an end of the solenoid plunger, so that the plunger extension hammer extends into a generally annular cavity of the solenoid bore. Surrounding the solenoid plunger extension hammer is a solenoid return compression spring. A wire seating and cutting tool holder is axially translatable within the nose portion of the barrel.

Abstract: A stapler comprises a stapler head which accommodates a strip of wire staple blanks and is pivotable between a starting position and a working position, in which it is applied against a sheaf of papers. A staple shaper shapes the blanks into substantially U-shaped staples, and a staple driver releases the thus-formed staples from the strip and drives them one by one into the sheaf of papers. A pivotable operating device reciprocates the staple shaper and the staple driver. A drive device is adapted to pivot the operating device in such a manner that it causes the staple driver to drive a staple into the sheaf of papers in a driving stroke and causes the staple shaper to shape the following staple in a shaping stroke, as well as adapted to pivot the stapler head to its working position before the staple driver performs the driving stroke and retain it there during the driving stroke of the staple driver.

Abstract: An electric stapler is automatically adjustable with regard to the stapling position and the stapling operation. The electric stapler consists of a switch lever limiting and detecting the insertion of papers to be stapled, a switch lever adjuster for adjusting the position of the switch lever, and an AC-DC converter mounted on a base for the stapler.

Abstract: A portable motor-driven staple machine comprises: a trigger operation detecting switch 5 which is turned on and off by a trigger lever 3; a contact detecting switch 25 which is turned on and off by a contact arm 23; a cycle completion detecting switch 21 which is turned on and off by a plunger 17; and a mode change-over switch for selecting a single cycle operation mode or a continuous operation mode. Those switches are connected to a control circuit 26. When the trigger lever 3 is operated with the contact detecting switch 25 in "off" state, a timer section in the control circuit 26 counts clock pulses so that when it is detected that a predetermined period of time has passed, the switch "on" signal of the trigger operation detecting switch 5 is cut off.

Abstract: A power stapler having a clincher provides a stitcher head for driving formed staples into a stack of sheets. A clincher box is positioned opposite the stitcher head. Clinchers located in the clincher box pivot upwardly under the force of a moving clincher bar to deform ends of the staple to pass through the sheet stack. The clincher bar or clinchers include a stop that limits retraction of the clinchers into the box. Hence, as the staple is driven by the stitcher head through the sheets, the ends of the staple are brought into engagement with the clinchers and plastically deform into a substantially inwardly curled shape. Following driving of the staple by the stitcher head, the clincher bar is actuated to rotate the clinchers upwardly toward the stack causing the curled tips of the staple to drive into the sheets. The clinchers can include grooves that are angled into alignment along parallel angled lines so that the ends of the staple pass each other and do not interfere with each other upon clinching.

Abstract: A stapler for driving staples (5) into an object (6) has a frame (1), a magazine (2) arranged in the frame and containing staples (5), and a drive element (3) adapted to push staples (5) out of the magazine (2) and drive them into the object (6) and, to this end, be reciprocated by means of a drive mechanism. The drive mechanism consists of a drive cylinder (19) rotatably mounted in the frame (1) and having an endless groove (23) in its circumferential surface. The groove (23) extends substantially helically from a starting point to a turning point axially spaced therefrom, and thence substantially helically back to the starting point. The groove (23) accommodates a groove follower (24) connected to the drive element (3) in order, upon rotation of the drive cylinder (19), to reciprocate the drive element (3).

Abstract: A cartridge for an electric stapler comprises an inner cartridge for holding a plurality of staple sheets in multi-layered form, each of the stapler sheets being formed by sticking straight staples together in sheet-like form, and an outer cartridge associated with the inner cartridge and detachably mounted on the electric stapler. The outer cartridge includes an accommodating section for accommodating the inner cartridge, a staple passage formed so as to extend from a lower end of the accommodating section, a staple receiving stand disposed at a front end of the staple passage, a pusher for pushing legs of a staple forward, the staple being formed into a square U-shape on the staple receiving stand, and a drive channel, arranged at the front of the staple passage, for receiving the formed staple pushed by the pusher. A driver plate of the main body of the stapler drives the formed staple in a direction orthogonal to the staple passage.

Abstract: A sheet stapling apparatus including a stapling device for stapling a set of sheets, a load detecting device for detecting a level of a load of the stapling device during a stapling operation, and a signal generating device for generating a signal when the load detected by the load detecting device is outside a predetermined range.