An impact stapler (100) includes an actuator mechanism (110) comprising a firing lever (180) pivotally mounted on a stapler housing (102) and operable by an operating lever (160) for raising a striker (112) against the bias of an actuator spring (240). The firing lever (180) has a front tip (190) which is positioned to engage a tab (272) on the striker (112) when the operating lever (160) is actuated to raise the striker (112) and which is shifted laterally to disengage the front tip (190) from the tab (272) to release the striker (112) for actuation by the actuator spring (240) after the striker (112) is raised. The impact stapler (100) includes a resilient finger (292) for shifting the firing lever (180) laterally to a rest position with the front tip (190) underneath the tab (272) on the striker (112). A stop (295) engages the firing lever (180 ) in its rest position to limit the bending of the resilient finger (292) and to locate the front tip (190) in a predetermined lateral position relative to the tab (272) on the striker (112).
The present invention is a fastener driving device for driving brads or staples into a workpiece. The device comprises a main body structure and magazine assembly for receiving a fastener package containing a plurality of fasteners connected together. The fasteners are staples or brads. The main body structure includes a drive track for receiving a lead fastener. A reciprocating driving structure moves through a fastener driving cycle including (1) a drive stroke and (2) a return stroke. The magazine assembly is constructed and arranged such that the lead fastener remains connected to the package until the driving structure engages the lead fastener and separates it during the drive stroke. The magazine assembly includes a movable interior fastener supporting structure and an exterior fastener guiding surface constructed and arranged to support a brad package. The interior fastener supporting structure is constructed and arranged to support a staple package when the device is being used to drive staples. The movable interior fastener supporting structure is configured to apply force in the direction of the exterior fastener guiding surface to provide tightened engagement of the brads in the brad package and thereby prevent undesired movement of the brad package in the driving direction in response to the driving structure engaging the lead brad during the driving stroke.
A compact simplified staple gun mechanism is disclosed. The invention provides an improvement to conventional staple guns and particularly to a forward action type staple gun. A compact high efficiency reset spring applies force in selected directions depending on the position of an actuating lever in the reset cycle. The lever and power spring engage a plunger through multiple proximate openings in the plunger while retaining a strong compact configuration. The lever and power spring are partially nested in each other and pivot about a common post of the housing. The above combined features provide a high efficiency compact staple gun tool.
A fastening device 100 includes a striker 260 for driving fasteners 129, such as staples 130 and nails 131, from the device and into a workpiece 396. The device 100 includes a fastener feed track 128 and a nosepiece 140 at the forward end of the track to guide the leading fasteners 129 into a discharge space 379 for ultimate driving of the lead fastener by the striker through the discharge space and from the device. The nosepiece 140 is formed with a groove or steep slope 402 adjacent the discharge space 379 which the nails 131 to move gradually laterally into the space for proper positioning of the nails as they are being driven through the space by the striker 260. The striker 260 is formed with a notch 406 in a portion of the surface of the striker which engages the fasteners 129 to drive the fasteners from the device 100. The notch 406 forms a nest which captures a head 392 of the nails 131 to prevent the nails from moving substantially laterally into the discharge space 379 as the nails are being driven from the device 100.
A simplified fastening tool which uses the energy stored in a spring to install fasteners by an impact blow is disclosed. A housing body is preferably cast or molded. A one-piece plastic hand lever is pivotably attached to the body where the pivoting action is by sliding in a circular arcuate channel. A staple feeding track is slidably mounted to the bottom of the housing and includes a rear end element with forwardly extending resilient latching elements to secure the track. A hand grip opening extends forward up to the plunger and the hand lever is hinged at the rear of the housing.
Described is a hand-held stapler that can be supported in the palm of a user's hand, so that both of the user's hands are available to position and hold items before and during stapling. The stapler includes an egg-shaped or domed stapler head conforming to and fitting against the user's palm, and a strap to hold the domed surface against the palm while freeing the user's fingers for positioning and holding the item to be stapled. A staple magazine carried on the staple head is moveable from an uncompressed position to a compressed position to discharge a staple when the stapler is pressed against a surface. A support base may be included to support the stapler head and magazine when not in use.
