Abstract: A nail stapler includes a gun and a magazine for receiving and supplying staple nails to the gun. The gun includes a shell, a solenoid received in the shell, a puncher received in the shell for movement from an original position to a punching position due to attraction by the solenoid, a pin secured to the puncher and inserted through the solenoid, a spring compressed between a portion of the solenoid and a portion of the puncher, and a security device received in the shell for buffering the puncher when the puncher is pushed from the punching position to the original position by the spring. The security device includes an elastic end for contact with the puncher. The nail elastic end of the security device includes a plurality of elastic elements. The puncher defines a cavity with a wall for contact with the elastic elements. The shell includes two halves each including a retainer formed on an internal face. The security device defines a groove for receiving the retainers of the halves of the shell.

Abstract: A stapler includes a frame and a mounting unit configured to be selectively attached to and removed from the frame. The mounting unit includes a staple cartridge, a staple former, and a staple driver. The staple cartridge is further removable from a portion of the mounting unit including the staple former and the staple driver when the mounting unit is removed from the frame to permit replacement of the staple cartridge of the mounting unit. The mounting unit can further include a staple advancing mechanism and a reverse motion stopping mechanism.

Abstract: A nail-hammering apparatus includes a hammer, a first solenoid, a second solenoid and a control device. The hammer can hammer a nail into a workpiece. The first solenoid can be turned on so as to drive the hammer. The second solenoid can be turned on in order to drive the hammer after the first solenoid. The spring tends to bias the hammer to its original position when the second solenoid is turned off. If the nail has not entirely enters the workpiece, the control device turns on the second solenoid so as to drive the hammer one more time.

Abstract: An electric stapler includes a frame, a motor mounted to the frame, a reduction gearbox connected to the motor, a cutter blade mounted to the frame for severing individual staples from an array of staples, an anvil against which the staples are deformed by the cutter blade, and a rotational element connected to the gearbox to be rotated thereby on demand, the rotational element including an off-centre pin co-operating with the cutter blade to effect linear movement of the cutter blade upon rotation of the disc. The gearbox typically includes a series array of interconnected modules, each housing at least one gear. A pivot secures the frame to the base such that a gap between the anvil and the cutter is adjusted according to sheet thickness as a result of sheet insertion over the anvil prior to activation of the motor.

Abstract: The present invention discloses a method and an apparatus for controlling an electronic nail gun, comprising a trigger link rod and a trigger. If a user triggers a fine-tune switch, the controller will control a three-outlet pneumatic valve to switch the three-outlet airflow according to the shooting mode set by the user, so that the valve rod of a cylinder will generate a predetermined number of times of the back and forth movements in a predetermined time to drive the trigger link rod, and the trigger will be pulled for a predetermined number of times in a predetermined time.

Abstract: The present invention is to provide a staple cartridge that can offset any discrepancies when mounting a staple cartridge, even if staples are slightly offset to check the occurrence of stapling defects. The staple cartridge 100 of the holding means 200 which is equivalent to the cartridge holder disposed as either a body separate to the stapler unit 300 or unitized thereto, actuates the staple feeds means 202. Even if the position of the staple pulled out from the staple cartridge is offset, this action corrects the offset to correctly set the staple at the driving position thereby enabling it to check stapling defects that occur because of mis-positioning of the staple set position.

Abstract: Outer shape dimensions of a staple cartridge for binding 100 sheets and a staple cartridge for binding 50 sheets are made the same. Staple detecting holes are provided at bottom faces of both of them, and a cartridge identifying hole for identifying a type of a cartridge is formed at one of them. A cartridge identifying sensor and a staple detecting sensor are provided at the inside of an electric stapler. Charge of the staple cartridge, determination of a cartridge type and presence or absence of a staple at the inside of the staple cartridge are detected by signals of the sensors.

Abstract: An electric stapler capable of handling multiple sheets of paper. A motor-driven pair of wheel gears turn a swing arm having a symmetrical structure for driving a staple firing assembly and a clinch mechanism, thereby applying large pressure uniformly on staples. The clinch mechanism bends staple legs in different directions so that they do not overlap each other, preventing the clinched part of paper from increasing in the thickness of the stacked paper.

Abstract: A portable electric nailing gun operating from a power supply. The motor accelerates a flywheel, which at the appropriate energy state is coupled through a mechanism to an anvil acting directly on the nail. The actuation is governed by a control circuit and initiated from a trigger switch. The stored energy delivered from the motor is coupled to the output anvil drives the nail. At least one position of the output anvil is sensed and once the nail is driven, the power is disconnected from the motor. This method uses a direct acting clutch and a harmonic motion nailing mechanism to reduce wear and increase robustness of the nailer. Elastic elements are used to limit stresses during the impact periods. The electrical control circuit and sensors allow precise control and improve safety. The power supply is preferably a rechargeable low impedance battery pack.

Abstract: [Issue] This invention prevents mis-positioning of staples when driving staples and checks the occurrence of binding problems by smoothly driving staples.

Abstract: A nail stapler includes a gun and a magazine for receiving and supplying staple nails to the gun. The gun includes a shell, a solenoid received in the shell, a puncher received in the shell for movement from an original position to a punching position due to attraction by the solenoid, a pin secured to the puncher and inserted through the solenoid, a spring compressed between a portion of the solenoid and a portion of the puncher, a security device received in the shell for buffering the puncher when the puncher is pushed from the punching position to the original position by the spring. The security device includes an elastic end for contact with the puncher. The nail elastic end of the security device includes a plurality of elastic elements. The puncher defines a cavity with a wall for contact with the elastic elements. The shell includes two halves each including a retainer formed on an internal face. The security device defines a groove for receiving the retainers of the halves of the shell.

Abstract: A compact, lightweight and rechargeable electric stapler for automatically punching holes in documents and the like is provided wherein a fixed switch is fixed to the case body and an actuating bar is moveable at the front end and back end, so the switch is durable and also the presence of staples can be determined at a glance with a LED. The electric stapler comprises a case body, drive train, wiring board, magazine frame, an arm, a fixed switch wherein an actuating switch for actuating the drive train (motor) is mounted on the case body, and a moveable actuating bar coupled to the fixed switch and mounted between the case body and frame.

Abstract: A staple forming mechanism having at least first and second configurations. The staple forming mechanism including a bend surface having a first surface width in the first configuration and a second surface width in the second configuration for forming staples having first and second crown sizes, respectively. The forming mechanism also includes at least two side portions spaced apart by a first former width in the first configuration and by a second former width in the second configuration. The side portions cooperate with the bend surface to form the staples. A stapler includes the forming mechanism and a driver including a driving surface having a first driver width in the first configuration and a second driver width in the second configuration for driving the staples of the first and second crown sizes into a stack of papers.

Abstract: Disclosed and taught is a novel drive mechanism for a cyclic operating tool employing an energized flywheel to provide the necessary energy to perform a working cycle. The drive mechanism disclosed is particularly useful in hand tool applications such as a hand held nailing machine. The flywheel may be energized by a corded or battery powered motor. The herein disclosed mechanism teaches a novel pair of ball ramp cam plates wherein a first pair of ball ramps cause an initial engagement of a clutch with the energized flywheel whereupon rotation of the clutch causes activation of a second pair of ball ramps which affect compression of a spring which acts to increase the pressure applied to the clutch thereby assuring a slip free engagement between the clutch and he flywheel throughout the working cycle of the drive mechanism.

Abstract: A buffer apparatus of a nailing gun, which controls the air flow in and out a chamber of a main body of the nailing gun, reduces the vibration of the nailing gun when nailing. The air will flow in with a larger rate and will flow out with a smaller rate, such that a buffer force will be provided to a bar being punched to reduce the vibration, and more particularly, the air flow also can bring the heat out.

Abstract: An anti-reversing device in the feed channel of a staple magazine containing staple blanks (ii), which magazine is accommodated in a stapler, wherein the staple blanks advance along a feed channel having channel guides (22) which support the staple blanks and wherein the supporting channel guides are equipped with stops (26) which prevent a staple blank which has advanced past the stops from moving in the direction opposite to the direction of feed.

Abstract: An electrically powered stapler has inner side walls incorporating a staple carrier for feeding a cartridge of staplers towards a stapling station where one of the staples in the cartridge is positioned for being driven by an electric motor through a number of sheets held in the station. The stapler includes a staple carrier-release button for mechanically releasing the staple carrier from an in-use stapling position (for the purpose of refilling the staple carrier with a staple cartridge). An electrical disable switch is associated is with the staple carrier to disable the motor if the staple carrier is not in the in-use stapling position.

Abstract: An electric stapler includes a case with a reciprocating staple forming plate and driver. A motor is connected to a planetary gearbox to provide a small electric stapler.

Abstract: A portable electric nailing gun operating from a power source. The motor accelerates a flywheel which at the appropriate energy state is coupled through a mechanism to an anvil acting directly on the nail. The motor accelerates a flywheel that is then clutched to the output anvil causing the nail to be driven. The position of the output anvil is sensed and once the nail is driven, the motor is dynamically braked reducing the excess energy in the flywheel. This method uses a highly responsive motor and power source which enables the motor to come up to speed, drive the nail and return to a low energy condition in less than 2 seconds. The electrical control circuit and brake allow precise control and improve safety. The power source is preferably a rechargeable low impedance battery.

Abstract: This invention relates to the design of a pin clutch to allow for coupling of a rotational shaft to an output mechanism in a synchronous fashion. Specifically, this is related to impacting or operations requiring intermittent or semi-intermittent coupling of an input mechanism or shaft to an output mechanism or shaft. Devices of this nature include fastening tools, throwing mechanisms and other devices in which input energy is built up during a portion of a cycle followed by the coupling and release of that energy to an output mechanism.

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: An impact device (10) employing a novel direct electric propulsion system. The device operates by placing a conductive piston (23) adjacent to an electric coil (18) then rapidly releasing electrical energy stored in a capacitor (17) to energize the coil (18) and propel the piston according to the Lorentz force principal. The system can be designed for a wide range of drive energy, and offers several performance advantages over known propulsion systems. These advantages include simple construction and operation, low manufacturing costs, low drive energy variation, and the ability to adjust drive energy while over a wide range while maintaining low energy variation at reduced levels. The system is adaptable to be powered by either corded electric, or battery, or fuel cell.

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 stapler for driving staples into objects comprises an anvil element (16) and stapling element (1), which cooperates with the anvil element and which contains staples. The stapler further comprises a driver (8), which is reciprocatingly arranged on the stapling element (1) and which is arranged to drive a staple into the object in the direction of the anvil element. An operating element (10) is arranged to reciprocate the driver (8). The anvil element (16) and the operating element (10) are movable back and forth relative to the stapling element (1) in one and the same path of motion. The anvil element (16) and the operating element (10) are movable relative to each other in this path of motion with the aid of reversible driving elements (19, 23, 26, 27, 29, 30, 32). The inertia of the operating element (10) against movement relative to the stapling element (1) is greater than its inertia against movement relative to the anvil element (16).

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 stapling device includes a wire fed in the casing of the device and a staple-bending member is movably connected to a base in the casing and has two protrusions extending from a lower end thereof. An ejecting member movably connected to the base. A mechanism is driven by an activation member and lowers the staple-bending member and the ejecting member to deform a section of the metal wire to be a staple which is ejected through an aperture to staple a pile of document.

Abstract: Disclosed and taught is a novel drive mechanism for a cyclic operating tool employing an energized flywheel to provide the necessary energy to perform a working cycle. The drive mechanism disclosed is particularly useful in hand tool applications such as a hand held nailing machine. The flywheel may be energized by a corded or battery powered motor. The herein disclosed mechanism teaches a novel pair of ball ramp cam plates wherein a first pair of ball ramps cause an initial engagement of a clutch with the energized flywheel whereupon rotation of the clutch causes activation of a second pair of ball ramps which affect compression of a spring which acts to increase the pressure applied to the clutch thereby assuring a slip free engagement between the clutch and he flywheel throughout the working cycle of the drive mechanism.

Abstract: A portable electric nailing gun operating from a power supply. The motor accelerates a flywheel which at the appropriate energy state is coupled through a mechanism to an anvil acting directly on the nail. The actuation is governed by a control circuit and initiated from a trigger switch. The motor accelerates a flywheel that is then clutched to the output anvil causing the nail to be driven. The position of the output anvil is sensed and once the nail is driven, the motor is dynamically braked reducing the excess energy in the flywheel. This method uses a highly responsive motor and power supply which enables the motor to come up to speed, drive the nail and return to a low energy condition in less than 2 seconds. The electrical control circuit and brake allow precise control and improve safety. The power supply is preferably a rechargeable low impedance battery.

Abstract: A sheet postprocessing apparatus includes a magazine unit and a clincher unit. The magazine unit has a driver which is vertically movable relative to a magazine for storing staple sheets. The clincher unit has a clincher holder, a driving mechanism for vertically moving the clincher holder, and a driving source of the driving mechanism. The magazine unit and the clincher unit are disposed vertically opposite to each other. In the sheet postprocessing apparatus, a material to be stapled is inserted between the magazine unit and the clincher unit. The clincher holder of the clincher unit is moved closer to the magazine unit by using the driving source so that a staple may be passed through the material and bent.

Abstract: An impact enhancing device of an electric nailer, comprising: an AC power source, a protection circuit, a first switch, a full-wave rectifier, a timing controller circuit, an energy-storage circuit, a solid-state switch circuit, an electromagnetic coil device, a DC power source, a second switch, a reset enable single shot trigger circuit, and a relay. Thus, the electric nailer provides a larger impact force with a smaller volume and a lighter weight.

Abstract: A motor-driven stapler is disclosed which comprises a table (100) arranged as opposed to a staple drive portion for driving a staple and provided movably up and down on a stapler body, and a driver for driving a staple from the staple drive portion to sheets of paper when the table (100) has been moved to press the sheets of paper against the staple drive portion. The table (100) is moved up and down by allowing the table (100) to rotate about axles (27) that are provided on the side plate portions (24, 25) of the frame (12) of the stapler body (10).

Abstract: A motor-driven stapler is disclosed which comprises a table (100) arranged as opposed to a staple drive portion for driving a staple and provided movably up and down on a stapler body, and a driver for driving a staple from the staple drive portion to sheets of paper when the table (100) has been moved to press the sheets of paper against the staple drive portion. The table (100) is moved up and down by allowing the table (100) to rotate about axles (27) that are provided on the side plate portions (24, 25) of the frame (12) of the stapler body (10).

Abstract: A stapler is provided with a frame and a head assembly pivotally disposed in the frame between a first open position and a second clamped position. The head assembly contains all of the operative elements of the stapler necessary to carry out a stapling operation and is biased toward the open position by a biasing member disposed between the head assembly and the frame. These operative elements include a staple driving mechanism, a motor fixed to the head assembly, a cam member connected to the motor and rotated thereby. The cam member contains at least three surfaces that simultaneously form and drive staples, pivot the head assembly in the frame, and actuate a microswitch controlling power to the motor. The cam member cooperates with a first bar disposed between the frame and a spring assembly to permit the first bar to flex to accommodate varying thicknesses or amounts of paper to be stapled.

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 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 manually operated hammer-type stapler for attaching a material to a surface with a tabbed staple includes a staple driver having a staple drive blade moveable along a blade pathway between a raised position to a lowered position; a striker at the distal end of the stapler; an elongated handle extending rearwardly from the staple driver; an elongated staple magazine beneath and parallel to the handle, the staple magazine having a discharge end adjacent the blade pathway to position a staple beneath the driver blade; and an elongated tab magazine parallel to and beneath the staple magazine, the tab magazine having a discharge end adjacent the blade pathway to position a tab beneath the driver blade, whereby the driver blade moves from its raised position to its lowered position when the striker is impacted against the surface to drive a staple through a tab and into the surface.

Abstract: A power stapler includes a base in which a gear system and a motor is received, and a punching arm which is pivotally connected to the base and a punching member is pivotally connected to the base. A punching plate is connected a free end of the punching member. A shaft extends through the punching member and two arms are connected to two first ends of the shaft. Two cam devices are respectively connected to two respective second ends of the two arms and the gear system powered by a motor is connected to an axle of one gear of the gear system. Accordingly, when the two arms are activated by the gear system, the punching member is lowered to proceed stapling action.

Abstract: Control device (21) for controlling, by means of a microprocessor (22), an electrical drive motor (2) that is incorporated in a stapler (1) and whose drive shaft (9) drives a staple driver (13) in a forward and reverse motion that has a defined start point and a defined reversing point, and which staple driver drives, during its forward motion, a staple (15) into a workpiece (17), preferably a sheaf of paper, wherein the control device (21) comprises a sensor (23) that senses the rotational speed of the drive shaft (9) and the number of rotations it has completed from the start point, and transfers the sensed information to the microprocessor (22) which, in a known manner, analyzes the obtained information and generates a control signal that controls the supply of current to the drive motor (2), whereupon the rotational speed of the drive shaft is regulated.

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 520 for pressing the sheet staples ST stacked in the receptacle chamber 603 toward the drive-out passage 601.

Abstract: A trigger assembly for a power fastener driving tool having a housing, a control valve mounted to the housing and a reciprocating workpiece contacting element associated with the housing, includes a trigger member being pivotally engaged on the housing and having a pair of spaced walls, an actuation lever having a free end and a pivot end pivotally engaged on at least one of the walls, the free end being constructed and arranged for engaging the workpiece contacting element, and a biasing element for biasing the lever and the trigger away from the valve. At least one of the walls are configured for receiving the pivot end and for defining two positions for the lever, a first position which places the free end farther from the workpiece contacting element, and a second position which places the free end closer to the workpiece contacting element, and the lever being selectively positionable in either the first position or the second position and being held in the selected position by the biasing element.

Abstract: A stapler is provided with a frame and a head assembly pivotally disposed in the frame between a first open position and a second clamped position. The head assembly contains all of the operative elements of the stapler necessary to carry out a stapling operation and is biased toward the open position by a biasing member disposed between the head assembly and the frame. These operative elements include a staple driving mechanism, a motor fixed to the head assembly, a cam member connected to the motor and rotated thereby. The cam member contains at least three surfaces that simultaneously form and drive staples, pivot the head assembly in the frame, and actuate a microswitch controlling power to the motor. The cam member cooperates with a first bar disposed between the frame and a spring assembly to permit the first bar to flex to accommodate varying thicknesses or amounts of paper to be stapled.

Abstract: An anti-reversing device in the feed channel of a staple magazine containing staple blanks (ii), which magazine is accommodated in a stapler, wherein the staple blanks advance along a feed channel having channel guides (22) which support the staple blanks and wherein said supporting channel guides are equipped with stops (26) which prevent a staple blank which has advanced past said stops from moving in the direction opposite to the direction of feed.

Abstract: A fastening device for driving a fastener into a workpiece by effecting multiple blows upon the fastener comprises a housing and a striker assembly movably mounted within the housing. The striker assembly includes a driver assembly adapted to strike the fastener to be driven into the workpiece. A nose assembly is movably mounted on the housing and has a fastener drive track along which the driver assembly and the fastener travel when the fastener is driven into the workpiece. The fastening device has a feed mechanism operatively connected to the nose assembly for mechanically advancing the fastener into the fastener drive track. The fastener drive track has a guide surface adjacent the aperture of the nose assembly to direct the fastener as it is driven into the workpiece. A releasable fastener assembly releasably secures the nose assembly to the housing of the fastening device. A control assembly controls the operation of the fastening device to conserve energy.

Abstract: A control module advantageously reduces cost and enhances reliability, design flexibility, ease of assembly, and performance of a flywheel operated hand tool. The control module includes a thin film printed circuit with non-contact speed sensing of a flywheel to more accurately set the target speed and control transfer kinetic energy thereof to a fastener, achieving a desired depth regardless of variations in component performance and battery voltage. The printed circuit also includes long service life thin film switches for responding to trigger and safety inputs. Furthermore, the control module responds to a user speed selection and to preset speed selection ranges to reconfigure the controls as appropriate to constraints of a fastener drive assembly and to user preferences.

Abstract: A power stapler which includes a housing, a staple anvil supported by the internal side wall, a staple carriage for feeding an associated cartridge of staples having a plurality of staples in aligned side-by-side relationship towards the staple anvil to position one of the staples in the cartridge above the staple anvil in position to be driven through a plurality of associated sheets held above the staple anvil and a punch plate mounted for sliding movement substantially in a plane that is substantially perpendicular to the staple anvil.

Abstract: A power stapler includes a base in which a gear system and a motor is received, and a punching arm which is pivotally connected to said base and a punching member is pivotally connected to said base. A punching plate is connected a free end of said punching member. A shaft extends through said punching member and two arms are connected to two first ends of said shaft. Two cam devices are respectively connected to two respective second ends of said two arms and the gear system powered by a motor is connected to an axle of one gear of said gear system. Accordingly, when the two arms are activated by the gear system, the punching member is lowered to proceed stapling action.

Abstract: A power tool includes multiple attachments to selectively perform rotary motions, reciprocating motions, and multiple impact motions upon a work surface. For example, tool attachments may be selected to configure the power tool as a nailer, stapler, biscuit jointer, drill, hammer drill, detail sander, sheet metal nibbler, router, buffer, jig saw, chipping tool, saws all, as well as other types of power tools. A base unit provides a rotary input that is adapted to each engaged tool attachment. In particular, a power tool control system in the base unit senses an attachment type designation from the tool attachment, as well as user inputs and motor feedback, to change motor control. Examples of these adaptions include changing motor speed, changing trigger operation from on/off to variable speed, responding to or ignoring a forward/reverse control, as well as monitoring motor feedback and sensors in the tool attachment for conditions warranting motor deactivation.

Abstract: A stapler device for stapling corners of objects such as boxes and frame together. The stapler device includes an elongate support member having a generally flat bottom side, a top side, a front end and a back end; and also includes a lever assembly having a front end and a back end and being hingedly attached to the elongate support member; and further includes a staple impact assembly being removably and securely mounted at the front end of the elongate support member.

Abstract: Outer shape dimensions of a staple cartridge for binding 100 sheets and a staple cartridge for binding 50 sheets are made the same. Staple detecting holes are provided at bottom faces of both of them, and a cartridge identifying hole for identifying a type of a cartridge is formed at one of them. A cartridge identifying sensor and a staple detecting sensor are provided at the inside of an electric stapler. Charge of the staple cartridge, determination of a cartridge type and presence or absence of a staple at the inside of the staple cartridge are detected by signals of the sensors.

Abstract: A fastening device for driving a fastener into a workpiece by effecting multiple blows upon the fastener comprises a housing and a striker assembly movably mounted within the housing. The striker assembly includes a driver assembly adapted to strike the fastener to be driven into the workpiece. A nose assembly is movably mounted on the housing and has a fastener drive track along which the driver assembly and the fastener travel when the fastener is driven into the workpiece. The fastening device has a feed mechanism operatively connected to the nose assembly for mechanically advancing the fastener into the fastener drive track. The fastener drive track has a guide surface adjacent the aperture of the nose assembly to direct the fastener as it is driven into the workpiece. A releasable fastener assembly releasably secures the nose assembly to the housing of the fastening device. A control assembly controls the operation of the fastening device to conserve energy.