Abstract: A feed unit is used to feed connection elements from a receiving position to a transfer position along a feed direction. The feed unit has a receiving part to which each connection element can be fed individually. A head piece is movably mounted in the receiving part and has a receiving region for the nuts, and a thrust unit to move the head piece. The head piece is rotated from a first rotational position into a second rotational position, being reached in an intermediate position, by a rotary device. A slider element moves relative to the head piece out of the intermediate position into a transfer position within the head piece such that the nuts are brought out of the head piece into the transfer position. The rotary device has a mechanical forced guidance unit which includes a control sleeve with a curved path into which a control element engages.

Abstract: In an automatic screw tightening apparatus, a feed head unit is movable to and from close contact with a driver bit portion. The driver bit portion contacts the screw and sucks the head portion of the screw in close contact. The feed head unit includes a longitudinal groove opened to the outside and connected to a vertically extending screw feed hole. Only a thread portion of the screw is capable of horizontally advancing and retreating in the longitudinal groove.

Abstract: A screwdriver for collated screws in which a tip of the screw projects forwardly of the tool prior to initiation of the screwdriving sequence and, preferably, a forwardly directed socket carried on a retractable nose portion engages the head of the screw to be driven and urges the screw forwardly into a workpiece such that the pinching of the screw between the nose portion and the workpiece initiates retraction of the nose portion preferably leading to engagement of the screw by a rotating driver shaft.

Abstract: A screwdriver for collated screws in which a tip of the screw projects forwardly of the tool prior to initiation of the screwdriving sequence and, preferably, a forwardly directed socket carried on a retractable nose portion engages the head of the screw to be driven and urges the screw forwardly into a workpiece such that the pinching of the screw between the nose portion and the workpiece initiates retraction of the nose portion preferably leading to engagement of the screw by a rotating driver shaft.

Abstract: An automatic fastener driving tool, or an attachment, has a narrow front-end profile so that it is capable of driving screws that are in hard-to-reach positions, such as corners or channel members. The slide body subassembly has an extending mechanism, so that the fastener drive elements extend farther away from the main body structure of the tool/attachment, while still providing a stable and rugged overall tool structure to drive larger screws. The “lick-out” dimension is increased without also increasing the length and width of the feed tube.

Abstract: Apparatus including a vending machine compartment including a dispensing door openable to permit removal of merchandise from the compartment, the compartment being pivotedly connected to a box assembly, and wherein the dispensing door includes a link element that is constrained to move along a track formed in the box assembly such that the dispensing door is not openable at a first portion of the track and is openable at a second portion of the track.

Abstract: A press-set threaded screw assembly includes a first member having an aperture. A second member abutting the first member includes a threaded bore co-axially aligned with the aperture. A screw body includes a body flange, a neck portion, and a threaded member. The threaded member in a non-installed condition has first and second displacement portions separated by a tapered slot, each having a main thread portion. A pin is frictionally received in a bore created through the body flange and neck portion in a screw non-installed condition. The threaded member is inserted through the aperture and received in the threaded bore in an initial installation condition. The pin is axially aligned to slide into the tapered slot, whereby the pin oppositely displaces the first and second displacement portions away from each other to contact a plurality of female threads of the threaded bore, defining an installed condition.

Abstract: An exemplary fastener feeder includes a pair of guiders, a slot cover and a blocker. The guiders define a sliding slot therebetween. Each guider includes a sloped part and a level part, bodies of the fasteners are capable of being received in the sliding slot, and a head of each fastener is capable of sliding down from the sloped parts and stopping on the level parts. The slot cover defines an opening for providing a path through which a fastener pickup device can pass through and engage with a fastener located on the level parts. The blocker is located below the level parts. When the fastener pickup device moves the fastener head engaged therewith away from the opening and a length of the fastener is greater than a distance between the blocker and the level parts, the fastener is blocked by blocker and disengaged from the fastener pickup device.

Abstract: A strip of fasteners may be provided with connecting portions between individual fasteners. Each individual fastener may include a body portion and at least one nail portion. The body portion may include at least a pair of leg members spaced from one another in a first direction and a crown portion joining the at least a pair of leg members. The nail portion may include an elongated shaft portion having a shaft portion central longitudinal axis and an elongated head portion attached to one end of the shaft portion. The elongated head portion may have a head portion central longitudinal axis that is transverse to the shaft portion central longitudinal axis. In a method of manufacturing the strip of fasteners, the nails may be simultaneously inserted into each fastener body portion. In a tool for installing fasteners, a pivot member may be provided to prevent jamming.

Abstract: The present invention provides a nail gun hanger including a C-shaped bracket and a pivotally attached lever. An inner arm of the lever carries a tooth that engages the bottom surface of a framing member such as a rafter or joist, when the outer arm of the lever supports the weight of a nail gun. The nail gun hanger allows the operator to hang the gun on a framing member to enable the use of both hands for other tasks. When the gun is lifted and its weight is no longer supported by the outer lever arm, the tooth of the inner lever arm disengages from the bottom surface of the rafter so the gun can be removed from the rafter and used.

Abstract: A screw fastening device allows efficient mounting and advancing of screws carried on a screw strip along a guide chute to prevent the screws from impacting a target object and damaging the target object and to precisely move the screw strip forward to precisely set the screws at a desired positioning point in a completely fixed condition and also allows for correcting the orientation of the sharp tip of the screw with a guiding and holding device and stably holding a body of the screw to prevent improper orientation of the screw and incorrect screwing thereby effectively and precisely screw the screw to a target object.

Abstract: A nail gun with an improved nail-belt transmission mechanism that comprises a ratchet wheel coupled to a transmission gear wheel through a transmission axle. One end of the transmission axle is provided with a link capable of driving the first ratchet wheel by a second ratchet wheel mounted on the inner wall aside the transmission gear wheel. There is a retaining part engaged with the second ratchet wheel from above for maintaining equal-pace rotation of the transmission gear wheel, thereby facilitating screw nail mounting by the nail gun.

Abstract: A nail gun with an improved nail-belt transmission mechanism that comprises a ratchet wheel coupled to a transmission gear wheel through a transmission axle. One end of the transmission axle is provided with a link capable of driving the first ratchet wheel by a second ratchet wheel mounted on the inner wall aside the transmission gear wheel. There is a retaining part engaged with the second ratchet wheel from above for maintaining equal-pace rotation of the transmission gear wheel, thereby facilitating screw nail mounting by the nail gun.

Abstract: A continuous screw tightening machine including a driving machine (4) equipped with a grip handle (2); a tightening machine main body (3) with which a bit (7) for screw tightening is removably connected to the driving machine (4) through a reduction gear and a clutch; and a screw feed mechanism through which the bit (7) is rotatably inserted and which sequentially feeds a screw to the position where a tightening operation is to be carried out by the bit 7. The screw tightening machine also includes a screw feed mechanism main body (6) which is connected to the front of the tightening machine main body (3) so as to be slidable in the longitudinal direction, a screw supply mechanism (110) which continuously supplies a number of single-part screws in sequence to the screw feed mechanism under the force of gravity, and a tip block (12) which is connected to the screw feed mechanism main body, providing a surface to be contacted with an object.

Abstract: A pneumatically operated power tool such as a screw driver, a nail gun and an impact wrench those being driven by a pneumatic pressure. A pressure reduction valve is provided between a connector connected to a compressor and a compressed air chamber defined in an outer frame of the power tool for supplying a pressure lower than the pressure at the connector to the compressed air chamber. A passage section is provided independently of the pressure reduction valve and communicating the connector with the compressed air chamber. A valve member is disposed at the passage section for selectively applying compressed air from the connector to the compressed air chamber directly through the passage section.

Abstract: An apparatus (10) for tightening a hexagon head bolt (13) includes a vertically movable automatic robot arm (16), a screwing mechanism (18) having a rotational part (19), a shaft member (20) mounted to the rotational part, a socket portion (21) mounted to the shaft member for receiving therein a head (14) of the bolt, and a retention means (22) for retaining the head received in the socket portion or retaining the head released from the socket portion. When the arm moves vertically with the head received in the socket portion, the rotational part is rotated along with the shaft member and the socket portion to screw the bolt into a threaded aperture (12) of a crankcase (11) of an engine.

Abstract: A screw driving device (2) for a hand tool drilling device (1) includes a screw magazine (3) for successive feeding of screws or bolts (4), a feeder block (6) that can be axially displaced against the force of a feeder spring (5), which at least partially supplies screws (4) during the back and forth reciprocating movement of the feeder block (6), and a driving tool (8) that can be coupled rotationally in form locked manner with a screw head (7), wherein the driving tool (8) axially moveably receives a rotatingly driven drilling tool (9) in a coaxial hollow inner space and is spring biased axially by a clutch spring (10) relative to the screw driving device in a rotation driver position X, in which a drilling tool tip (11) is axially spaced from the screw head (7) and is coupled rotationally form locked with the driving tool (8).

Abstract: Apparatus for driving fasteners, in particular screws, nails, pop rivets, and staples, is disclosed. It has a motor-drivable feeder that moves the fasteners sequentially from a feed position into a driving position, and with an adjustor has a manually rotatable threader mounted stationary on the feeder. The thread engages interlockingly with the stop member.

Abstract: A screw-belt advancing mechanism of a screw driving gun includes a barrel unit, a sliding unit connected telescopically to the barrel unit and movable relative thereto between extended and retracted positions, a pivot pin mounted on the sliding unit, and a spring-biased lifting member to engage releasably a screw-retaining belt fed into the sliding unit. The lifting member is pivoted to the pivot pin, and is associated with the sliding unit in such a manner that the lifting member is moved toward the barrel unit and pivots about the pivot pin in a first direction so as to push the screw-retaining belt to a desired position, in which, a selected screw on the screw-retaining belt is aligned with a driving shaft in the barrel unit when the sliding unit slides from the extended position to the retracted position.

Abstract: A screw feeding device includes a one-piece member composed of a gar, a hollow shaft and a positioning gear, a one-direction bearing received in the hollow shaft and a biasing plate contacting the positioning gear. The one-piece member reduces the space occupied by the parts of the device. An adjusting shaft has a serrated surface at one end to contact a safety board and a plurality of notches in the other end of the adjusting shaft, the notches are engaged with a bead biased by a spring, thereby controlling a depth of the screw that penetrates in an object. The guide body of the device is composed of two halves so that the manufacturing cost is reduced.

Abstract: A blocking and/or advance pawl mechanism for an autofeed fastener driving tool with at least one of the pawl arms maintained rearward of a next fastener to be driven from a strip holding fasteners spaced in a row.

Abstract: A nosepiece for fastener driving tools with a contact surface for engagement with the workpiece with a rounded profile to facilitate driving fasteners at an angle into the workpiece. Preferably, the contact surface has a first radially innermost portion of the contact surface for engagement of the workpiece when a screw is being driven substantially normal to the surface of the workpiece and a second outer portion of the contact surface radially outwardly from the innermost portion which outer portion is adopted to engage the work surface when a screw is being driven at an angle other than substantially normal to the work surface, the characteristics of the innermost portion of the contact surface and outermost portion of the contact surface varying such that the outer portion provides resistance to slippage of the nosepiece on the work surface when a screw is being driven at an angle to the normal.

Abstract: An improved structure of a screw mounting device comprising a machine body, a machine tubing, a controlling module and a retractable adjusting device located at one lateral side of the machine body, the end face of the front end of the machine body being a sloping side to allow a sliding wheel of the controlling module to urge against the sliding, the controlling module comprising a guiding rod, the sliding wheel and a cavity body and the controlling module located at the side of a screw insertion slot module, characterized in that the lateral side of the sliding rod is extended to provide a shaped holding block, and the holding block is appropriately mounted at a recess located at the bottom section of the screw-pushing plate, the sliding wheel is pivotally mounted at the top section of the guiding rod, and the bottom section of the guiding rod is provided with a spring within the cavity body, thereby when the sliding wheel urgingly slides together with the sloping side, the guiding block is simultaneously m

Abstract: The present invention is a power-operated screwdriving device configured to be used with a rotary power source and a supply of collated screws. The device comprises a housing structure and a feeding assembly defines a drive track carried by the housing and providing a workpiece engaging surface. The drive track is configured to receive a lead screw from the supply. A rotatable screw engaging bit member is constructed and arranged to be operatively connected to the rotary power source such that the rotary power source rotates the screw engaging bit member during a screwdriving operation. The rotatable screw engaging bit member is movable relative to the drive track and the workpiece engaging surface such that, when the workpiece engaging surface is engaged with the surface of the workpiece, rotation of the bit member and relative movement between the bit member and the drive track drives the lead screw into the workpiece during the screwdriving operation.

Abstract: The present invention is a screwdriving device configured to be used with a rotary power source and a screw collation supply. A feeding assembly defines a drive track and a rotatable screw engaging bit member is operatively connected with a rotary power source. The bit member is engageable with the lead screw and movable relative to the drive track to drive the lead screw into the workpiece. The feeding assembly is constructed and arranged to move a subsequent lead screw from the screw collation supply into the drive track. The feeding assembly includes a screw feeding structure movable between (1) a lead screw engaged position and (2) a subsequent lead screw engaging position. The feeding assembly includes a biasing element engaged with the screw feeding structure.

Abstract: The present invention is a power-operated screwdriving device configured to be used with a rotary power source and a supply of screws. The screwdriving device comprises a housing structure constructed and arranged to be engaged with the rotary power source. Structure defines a drive track constructed and arranged to receive a lead screw from the supply of screws. A rotatable screw engaging bit member is constructed and arranged to be engaged with the lead screw from the supply of screws during a screwdriving operation wherein the lead screw is driven into a workpiece. A releasable bit locking assembly is disposed in the housing and constructed and arranged to operatively connect the bit member to the rotary power source to enable the rotary power source to rotate the bit member during the screwdriving operation. The releasable bit locking assembly includes bit locking structure constructed and arranged to lockingly engage the bit member.

Abstract: In a roofing washer-dispensing and fastener-driving machine, which has a fastener-feeding tube, a fastener-engaging pawl is mounted operatively to the tube, near its upper end. The pawl is pivotable between a normal position wherein the pawl is arranged to engage a fastener dropped into the tube so as to prevent the fastener from dropping through the tube and a pivoted position wherein the pawl is arranged to disengage from the fastener. An elongate rod is arranged to pivot the pawl from the normal position into the pivoted position when the machine is operated.

Abstract: The present invention is a power-operated screwdriving device configured to be used with a rotary power source and a supply of screws releasably mounted on a severable collation. The screwdriving device comprises a housing structure constructed and arranged to be engaged with the rotary power source. Structure defines a drive track constructed and arranged to receive a lead screw releasably mounted on the severable collation. A rotatable screw engaging bit member is constructed and arranged to be operatively connected with the rotary power source such that the rotary power source can rotate the screw engaging bit member. The screw engaging bit member is engageable with the lead screw and movable relative to the drive track such that rotation of the screw engaging bit member and relative movement between the screw engaging bit member and the drive track separates the lead screw from the severable collation and drives the lead screw from the drive track into a workpiece during a screwdriving operation.

Abstract: A successive screw feeder driver capable of using plural types of screws of different lengths, capable of finely adjusting a screw driving position, and further capable of coping with a difference in the mounting position of a belt-like number of plurality of screws. A screw driving bit is connected detachably to a screw driving mechanism and a screw feed mechanism is slidable longitudinally connected to a front portion of the screw driving mechanism. An adjusting mechanism for adjusting a longitudinal position of the bit is constituted in the screw driving mechanism. A screw feed device is constituted in the screw feed mechanism for feeding screws arranged side-by-side on the belt-like member up to a screw driving position where each screw is driven separately by the bit, in an interlock with the screw driving operation performed for the bit.

Abstract: In the case that the screw is to be driven, the extremity end of the screw chain is lifted up in an upward direction, thereby even if the screw having a flat seat surface is applied, the screw is driven under an appropriate state without holding the screw chain having some spaced-apart screws therein between it and the seat surface of the head section of the screw.

Abstract: A screwdriver with a nose having a touchdown foot to engage a workpiece and an arm member forward of the foot forming a slotway between the foot and the arm member adapted to receive edges of sheet material and hold the sheet material against movement away from a screw being driven.

Abstract: A screw driving and turning machine comprises: a body having a nose portion; a driving cylinder received in the body; a screw driving mechanism having a driving piston having a driving and turning bit slidably accommodated in the driving cylinder, wherein compressed air is fed into the driving cylinder to drive the driving piston, and a screw held in the nose portion of the body is driven to a state in which a head portion of the screw is raised; a screw turning mechanism having an air motor driven by a portion of compressed air fed to the driving cylinder, for turning the screw, which has been driven by the driving piston; a stop valve for opening and closing an air passage between the driving cylinder and the air motor, arranged in the middle of the air passage; and a contact arm slidably arranged along the nose portion, for operating the stop valve by being pushed to the body in accordance with pressing an end of the contact arm against a material into which the screw is driven, wherein the feed of compres

Abstract: This invention relates to an advance and release mechanism for strips of a screwdriver assembly that sequentially drives fasteners retained in a holding strip securing a plurality of fasteners in a row. The apparatus has a slide body with a lateral slot and an intersecting vertical bore. The lateral slot has a uniform transverse cross-section configured to slidingly receive the strip. A driver shaft including fastener driving bit means for engaging and driving a lead fastener in succession into said work piece is journalled and longitudinally slidably housed in the bore between an engaged position and a withdrawn position. Advance means are mounted to the body for incrementally forwardly advancing the fasteners of the strip within the lateral slot in succession and for aligning the lead fastener coaxially with the bore.

Abstract: A screw strip is disclosed in which each screw carries a washer on its screw shank between the tip of the screw and a plastic strip carrying a plurality of screws. A screw driving apparatus, and method of use of the strip are also disclosed. The washers and screw heads are of relatively large diameter and adjacent washers overlap each other. The power tools used to install the screws include indexing means which advance successive screws into driving position, and retract the remaining screw strip rearwardly in order to avoid interference between the driving tool, the driven screw and adjacent washers. This configuration permits application of large head screws such as hexagonal head screws carrying large washers by power tool socket drivers and is particularly useful in sheet metal applications. The invention is applicable to any fastener with a threaded shank including bolts and screws.

Abstract: A device with automatic feeder, for driving ribbon-mounted screws comprising a guide in front of which a box-like body is mounted so that it can slide longitudinally; moreover the body has a shallow seat for the sliding of the ribbon which is connected to a longitudinal hole for positioning the first screw and for the longitudinal sliding of the shank of the screwing tool and can be closed, in an upward region, by a sort of lid which is pivoted to the body and can be locked by means of a sliding bolt in the seat covering position; the seat is crossed by a lower tooth for retaining the first screw which is associated with a lever system; and a spring latch is mounted in the lid and is actuated so as to oscillate.

Abstract: An automatic screw feeding mechanism includes a feed belt receiving unit including a hollow housing which is provided with a limiting unit that is connected releasably to a stop unit of a hollow casing. A feed belt extends into the housing. A retaining unit is adapted to engage the feed belt to align a first screw with a tool bit of an automatic screw driving device which is connected releasably to and which extends into the casing. A guide plate is connected to the housing and has a front end that is spaced apart from the housing and that is adapted to engage an operating surface. An elongated guide unit is received in the casing and is connected releasably to the housing. An actuating unit includes a seat member which is received in the casing and which is movable forward and rearward relative to the guide unit.

Abstract: An automatic screw driving gun has a belt feeder mechanism (1) for advancing a screw supply belt (2) through a feeder housing (6) in response to the rotation of a screw drive shaft or blade (11, 28) . The belt feeder mechanism (1) has a feeder lever (12) coupled to the rotating screw drive blade (11, 28) through a coupling device including a rocker lever (16) and a toggle lever (18) for a stepwise advance of the belt (4) through the feeder housing perpendicularly to the screw drive shaft. A cam driven by the screw drive shaft advances the feeder lever with each blade rotation whereby the power of the drive motor is used for the belt advance thereby relieving the operator.

Abstract: A feeding device for a fastener inserting tool, particularly screw. The structure of the feeding device is a two-armed rocking lever mounted on a slide element. This mounts the sprocket wheel for rotation about the same pin as the rocking lever. The connection between the rocking lever and sprocket wheel is by means of a ratchet detent.

Abstract: An automatic screw feeder to be coupled to a conventional electric screw driver so that a plurality of screws may be successively and automatically grasped and relocated from a screw supply to the screw driver bit. The screw feeder includes a swing arm assembly that is rotatable between a screw feeding position, at which the screws are removed from the supply, to a screw installing position, at which the screws are driven into a flat surface, or the like. The swing arm assembly includes a pair of opposing swing arms and a rotatable cam therebetween to control the separation and closing of the swing arms and the grasping and removing of the screws from the supply. The screws are carried on a spirally wound bandolier that is loaded within and removable from a storage drum.

Abstract: An automatic screw-driving device including a sliding box and a sprocket to move a screw belt through the sliding box, the sprocket being locked at one of various positions to keep a screw on the screw belt at a secured position for a driver rotated by an electric motor to fix in something, the sprocket being rotated by a shaft rotated by pulling the sliding box forward and backward forcing an orienting rod to move along in a non-straight groove in the shaft fixed through a side wall of the sliding box contained in a housing so that the shaft is rotated.

Abstract: An apparatus for feeding a plurality of associated screws to an associated power screwdriver having a chuck. The apparatus includes a main body that includes a shaft dimensioned and configured to engage the chuck of the associated power screwdriver. The main body also includes a bit and apparatus for holding the bit and transmitting rotational energy from the shaft to the bit. The apparatus also includes a magazine dimensioned and configured to receive a plurality of associated screws disposed with the respective axes thereof in substantially coplanar relationship. The apparatus also includes apparatus for detachably connecting the magazine to the main body and a pickup assembly including a spring apparatus for gripping associated screws on opposed sides of the associated screws and apparatus for pivoting the spring apparatus between a first position proximate to the magazine and a second position proximate to the bit.

Abstract: A screw driving device for screws connected by a screw connecting strip is essentially constituted by a motor body and a guide with which a screw magazine and a slider are associated, with said slider being provided with side channels for screw feeding and a longitudinal channel for screwing down said screws; on said slider, an element is furthermore provided which, during the screwing down step, prevents said screw connecting strip and the other screws from moving from their correct feeding position.

Abstract: An installation machine for sequentially driving fasteners through automatically fed plates for securing insulation to a roof deck employs a pneumatically actuated feed mechanism. The plates are loaded in a chute. A shuttle at the underside of the frame reciprocates to feed a plate in position below a power driver for driving the fastener through the fastener plate. The frame includes a pair of wheels for facilitating the movement of the machine across the roof surface. A pneumatic regulator responsive to release of the power driver regulates the timing of the feed mechanism.

Abstract: The invention relates to a device for setting fastener elements or pins, particularly to a screw-setting device. The device comprises a housing in which a retainer shaft for a setting tool is mounted at least for axial displacement, at least one advance drive mechanism within the housing and adapted to be connected to the retainer shaft, a switching sleeve mounted for displacement together with the retainer shaft and defining at least one switch-off point, at least one sensor device supported in the housing for defining the switch-off point, and an adjustment mechanism for adjusting the switch-off point. In known devices of this type, the accurate and rapid adjustment of the switch-off point is difficult. According to the invention the adjustment mechanism is provided within the housing between the switching sleeve and the retainer shaft.

Abstract: A robotic die mounting mechanism can be used to apply or remove fasteners to or from aligned locations such as pre-drilled and pre-tapped holes in a cutting die and backing drum for attaching or detaching the die to or from the drum. The mounting mechanism including a fastener supply magazine with a dispensing chute, a robotic arm, a socket on a rotary driver, and an actuator mounting the driver. The magazine holds a supply of the fasteners and its chute dispenses one fastener at a time from the magazine. The robotic arm movable between a fastener pickup position adjacent the magazine chute and a fastener discharge position remote therefrom and above the die and drum receives one fastener at a time from the magazine chute and transfers the fastener from the fastener pickup position to the fastener discharge position. The socket on the rotary driver engages the fastener at the fastener discharge position.

Abstract: A barrel assembly includes a housing for attachement to a conventional driving tool. A barrel member having a through bore is slidably attached at one end to the housing and carries a stress plate retaining pad at the other end. A pre-assembled enlongated headed fastener and stress plate combination is inserted into the barrel assembly whereby, during driving, the head of the fastener is slidably guided by the barrel bore while the shank portion of the fastener is rigidly held by the locked stress plate assuring a perpendicular driving alignment between the fastener and the workpiece, such as a roof deck plate. Biasing means normally forces the barrel in an extended position relative to the housing and also permits the barrel and stress plate retaining pad to retract during a plate tapping sequence of the fastener to prevent thread stripping of the stress plate.

Abstract: A pneumatically operated and controlled fastener feeder and driver apparatus supplies individual fasteners, such as screws having a head and a threaded shank portion, which are maintained on a carrier strip in a magazine assembly, to a nose assembly of the fastener feeder and driver apparatus. When a fastener is positioned in the nose assembly, a driver member of a power fastener driving tool engages the fastener and positions the fastener such that the fastener extends out from a workpiece engaging surface of the nose assembly. When the fastener is driven into the workpiece to a specified depth, a pneumatically operated and controlled driver mechanism moves the fastener driving tool away from the workpiece.

Abstract: A supply apparatus for supplying a screw, a rivet, or the like includes a chute in which one edge portion of an upper opening of a guide slit formed therein is located inside a stock section or thereabove, so that screws in an abnormal position can be removed by a brush member not on the upper surface of an oscillating dipper but on the upper surface of the chute. A timing between oscillation of the dipper and movement of the brush member need not be controlled. Screws of abnormal position can be removed with a simple mechanism so as to supply only those of normal position to a predetermined position, and to reliably return removed screws of abnormal position into the stock section.

Abstract: A portable screwdriver comprises a prime mover and, an apparatus formed as a couplable attachment, which contains the screwing tool on a drive shaft which can be connected to the prime mover. The apparatus carries a magazine receptacle for a strip-like screw magazine from which the screws are pressed under spring tension into an arcuate screw guide, where they are held between two retaining jaws until the screwing tool has taken them up and has released them for insertion purposes by swinging the retaining jaws apart. The apparatus is particularly suitable for self-tapping screws and has a narrow front cross-section, so that it can also be used at otherwise inaccessible points.The easily replaceable screw magazine comprises a plastic profile with screws guided parallel to one another and at right angles on the heads. The screws can be constructed with plastic heads and jamming ribs provided thereon.

Abstract: An automatic screwdriver for driving a screw in a horizontal direction comprises a chute for supplying screws with their shanks hanging down, a gate for allowing the screws to be discharged one at a time out of the chute, an index mechanism for carrying a screw discharged from the chute along an angular interval to a catcher disposed in front of a screwdriver bit unit. The index mechanism has a carrier arm angularly movable between a first position in which it receives the screw from the chute and a second position in which the screw is transferred from carrier arm onto the catcher. The screwdriver bit unit comprises a suction pipe for drawing the screw therein from the catcher and a screwdriver bit rotatably disposed in the suction pipe and axially movable for driving the screw into a workpiece. The automatic screwdriver is driven by a pneumatic control system for actuating the gate, the index mechanism, and the screwdriver bit unit.