A gun-type manually operable tool for firing a fastening element such as a staple into a work piece is disclosed. The tool comprises a driving means including a spring loaded ram means movable through an arming and firing stroke into contact with a staple situated at the driving station of the tool. A movable means engageable with the ram means operates to move the ram means through the arming stroke and release means is provided for automatically effecting disengagement between the ram means and movable means at the completion of the arming stroke permitting movement of the ram means through the firing stroke. The tool is actuated by depressing a pivotally mounted actuating handle which is responsively connected to the movable means by a linkage means. The movable means includes a ram lifting member which is pivotally mounted on one link of the linkage means and the release means includes a pin element disposed in the path of movement of the ram lifting member; the pin acting as a cam to pivot the ram lifting element out of engagement with the ram at the completion of the arming stroke. Advantageously, the pin element also serves to pivotally mount the actuating handle. Also, the tool includes a magazine means for incrementally feeding fastening elements to the driving station and a window in the external housing of the tool having visual measuring means for determining the length of the fastening elements loaded in the tool.
A gun-type manually operable tool for driving fastening elements, such as nails, into a work piece. The tool comprises a driving means including spring-loaded ram means movable through a series of arming strokes and firing shots to drive the fastener into the work piece. The tool is constructed to accomplish at least two driving shots for each fastener using a ram having multiple driving surfaces which are positioned by the fastening element and by cam arrangements to accomplish at least two driving shots.
A trigger-operated staple tacking device comprises a body and an operating handle pivotally connected at one end to the body, operation of the trigger to actute a staple driving mechanism of the device being effected by squeezing the other end of the handle and the body together against the action of a return spring operative to return the handle to a position projecting from the body. The body has a recess to receive the handle when the device is not in use, a movable catch on the handle co-operating with a clip on the body to hold the handle in the recess. The staple driving mechanism comprises a linearly movable staple driving blade and resilient means extending transversely of the path of movement of the blade and biasing the blade towards a staple ejection slot, the blade being movable by the trigger out of the staple ejection slot against the action of the resilient means whereby the blade is driven to eject a staple upon release of the blade by the trigger.
In a spring-energized stapling machine according to the invention, some provisions are included for extending the function of the machine and preventing any harm possibly caused by the abuse of the machine. These provisions comprise a check plate which can be adjusted to obstruct the operating handle of said stapling machine, a movable fitting serving as a backing plate for paper-fastening in one state and as a safety shield to prevent the driving of staples in an other state, and which can be moved to allow conventional ejection of staples, two different systems of measuring scales engraved on both sides of the foot of said machine, and a novel staple supply which possesses two sets of grooves to accept staples of different sizes and, at its rear, means for staple removal.
A stapler includes a pair of walls disposed in parallel in a top so that a space is formed between the walls, one or more ribs are formed in the space, and a punching element force-fitted in the space and force-fitted between the ribs such that the punching element is stably retained in place.
