Abstract: A slider for a concealed slide fastener comprises a body including a flared front end and a contracted rear end, and having a bottom wall, a pair of side flanges formed on the bottom wall, and a pair of inturned lips extending from the side flanges. A element guide island is formed centrally on the bottom wall near the flared front end and cooperates with the side flanges in providing a substantially Y-shaped guide channel for the passage therethrough of a pair of rows of interlocking fastener elements. A support lug is provided on the island, and a pull tab is pivotally supported on the lug. The pull tab is rectangular and has at one end an aperture, bifurcations bounding the aperture, and a pintle connecting the bifurcations together and passing through a hole formed in the lug. The bifurcations have extensions held in engagement with the sides of said support lug.

Abstract: An automatic lock slider for slide fasteners comprises a slider body having an upper and a lower wing connected by a neck portion, the upper wing having a recess for receiving a leaf spring and a through opening parallel with the leaf spring. A pull member is pivotally supported on the slider body and has at one of its ends a first cam held in abutting relation to the leaf spring and a second cam parallel to the first cam. A locking member is actuated by the second cam and has a locking prong movable through the through opening into the path of fastener elements and disposed in close proximity to the neck portion when the slider is in locked position. A support stud extends upwardly from the recess adjacent to the through opening and has a stop adapted to limit pivotal movement of the locking member, the stud serving as a pivot about which the locking member is rotatable.