Mechanism for assembling sliders for interlocking fastener strips

A mechanism for positioning sliders on releasably interlocking rib and groove flexible plastic fasteners which operates to clamp the fastener closed at a closing end of the slider and hold the fastener with the profiles open at the opening end of the slider and press the slider from an engagement position onto the fastener to an operative position with the legs of the slider straddling the rib and groove closure. The mechanism includes a pusher with alternating movement from a slider engaging position to a slider installing position wherein the pusher places the slider on the fastener strips and includes delivery means for bringing individual sliders to said slider engaging position and drive means operating the pusher and the delivery means in phase.