Patent ID: 9656376
Date: 2017-05-23
CPC Classifications: B25C

Claim:
1. A self-arming staples feeder system in a fastener driving device for feeding U-shape staples from a fastener support rail formed in a magazine to a fastener drive track formed in a drive guide for reciprocating movement of a driver and connected to a forward portion of the fastener guide track, the U-shape staples defining two side legs and a base leg, said feeder system comprising: a slider member operable by an operator and slidably movable in a facing guide tracks slider channel made in a longitudinal direction of the fastener support rail; biasing means for biasing said slider member in the forward direction of the fastener support rail slider channel; a pusher member movably mounted in said slider channel in the longitudinal direction of the fastener support rail and defining a pair of opposite sensors, each of said sensors having opposite first and second end portions, a pair of spaced jaws formed at said sensors first end portions and sized and shaped for abutting against the staples side legs respectively at a trailing end of a stack of staples on said support rail, said jaws defining a gap therebetween, and free standing hinge means provided at said sensors second end portions for tilting said sensors relative to one another wherein said jaws are movable relative to one another responsive to staples travel between an open position in register with the staples two side legs, and a retracted position clearing the trailing end of the stack of staples wherein the pusher member is sized and shaped to freely engage within said slider channel and between the two side legs of the U-shape staples carried by the support rail in said jaws open position in concealed fashion; and interlocking means provided between said slider member and said pusher member for permitting movement of said pusher member concurrently with said slider member within said slider channel and for moving said pusher member in such a manner that said jaws move from said open position to said retracted position according to movement of said slider member in a rearward direction of the fastener support rail.