Abstract: A lockable slider for a slide fastener is disclosed which has a locking prong integral with a pull tab and engageable between two adjacent fastener elements. The locking prong has a rounded apex, an arcuate slide surface and a vertical lock surface, said slide surface extending a length greater than the space or pitch between adjacent elements such that the locking prong can move freely in sliding relation to the rows of fastener elements on the fastener when the latter is opened.

Abstract: A pull tab attachment for attaching a pull tab to a slider body is made of a plastically deformable material. The pull tab attachment includes a ring member on one end for being loosely fitted in a pull tab retainer on the slider body, and a pair of jaws comprising a pair of gripper arms on the opposite end for gripping an end of the pull tab therebetween. The gripper arms have on inner confronting surfaces thereof a plurality of biting teeth extending in different directions for biting engagement with the end of the pull tab gripped between the gripper arms.

Abstract: An automatic lock slider for a slide fastener includes a locking prong spring-biased to protrude into a Y-shaped guide channel in a slider body. The locking prong is urged downwardly to engage a coupling head of a coupling element in an intermeshing region where the mating pair of coupling elements are brought into and out of intermeshing engagement. The locking prong is urged against the coupling head to effect locking of the slider.

Abstract: An automatic lock slider for a slide fastener provided with discrete coupling elements includes a locking prong which is movable into and out of a guide passage in the slider. The prong has a cam surface downwardly canted at an angle of 20.degree.-30.degree. which represents the critical point at which the coupling elements would otherwise become displaced or dislodged when subjected to stresses tending to spread apart the fastener chain, and the cam surface initiates at a position above the upper end surface of the coupling element. This arrangement facilitates passage of the fastener chain underneath the locking prong without marring the coupling elements when external forces are exerted on the fastener chain.

Abstract: An automatic lock slider for slide fasteners comprises a slider body including an upper and a lower wing defining therebetween a guide channel for the passage of slide fastener coupling elements, a locking member for locking the slider against movement, a pull tab operatively associated with the locking member for manipulating the slider, a casing and a spring member interposed between the casing and the locking member and normally urging the latter in a direction to lock the slider. The casing has retaining lugs interiorly disposed for folding over the spring member to retain the latter in position stably but loosely to permit its resilient movement relative to the locking member.

Abstract: A slide fastener slider has a reversed bend spring member mounted on the slider body and having a spring tongue bend reaching through a window in a fastening portion thereof which is opened in one side. This increases the resilient force with which the tooth or pawl engages the coupling member and also allows the spring element to be thinner than the earlier system in which a sheet metal spring is used.

Abstract: A locking slider assembly for a slide fastener includes only a slider body, a locking spring and pull tab. The three components can be automatically assembled substantially without component deformation. In one embodiment, the pull tab includes an eccentric locking spring release bar to effect spring release by rotation of the pull tab in a semi-automatic slider locking mode. In another embodiment, the locking spring is released by pulling of the pull tab in either direction of slide fastener operation and locking of the slide fastener occurs automatically upon release of the pull tab.

Abstract: A slide fastener has a top end stop or stops dimensioned to be receivable within the interior of a slider having upper and lower shields connected together by a neck or diamond portion. This portion of the slider is recessed to receive a protuberance of the top end stop so as to reduce the resistance encountered upon starting movement of the slider in a direction to open the fastener.

Abstract: An automatically locking slider for slide fasteners has a locking member including a piece of resilient strip which is bent into a generally "3" or "E" shape having a U-shaped base extending around a transverse spindle of a pull tab, a locking prong extending from one end of the base, and an anchor extending from the other end of the base and terminating in a recessed end interlocked with a locking-member retaining-nose on a neck of a slider body. The base is normally urged against the spindle of the pull tab by the resilience of the strip. The recessed end of the anchor is normally urged against the nose by the resilience of the strip and is thereby prevented from coming out of interlocking engagement with the nose. Thus the locking member is held in position on the slider body solely by the resilience of the strip, requiring no bending or deformation of any part of the slider body that would make the slider defective from an aesthetic view.