Abstract:
A slider for a slide fastener is constructed with a pair of wings joined at their front end portions by a spacer post and provided with lateral edge flanges extending to their rear portions. The edge flanges on one wing project toward the edge flanges on the other wing to define tape slots therebetween; surfaces on the edge flanges are arranged to control a minimum dimension for the tape slot and to absorb compressive forces on the rear portions of the wings.
Abstract:
An apparatus for forming a top stop for a slide fastener of the type providing a seam-like closure including a forming block for supporting the slide fastener with its edges folded and the undersides of the folded edges exposed, stock guides supplying fusible material to recesses on either side of the forming block, a forming anvil for shearing the fusible material and defining cavities with the recesses for the fusible material and a member for fusing the material to the undersides of the folded edges to form two separate stop members for the top stop.
Abstract:
A slider for a slide fastener device having a pair of wing portions connected in spaced relation by a post element and having an upper structure on one of the wing portions of sufficient height to receive any load applied to the slider and transmit such load to the connecting post. The upper structure includes a wall surface super-imposed over the connecting post and being substantially flush with the leading edges of the connecting post and the leading edges of the wing portions.
Abstract:
A slider assembly for a slide fastener is disclosed with a slider body with a locking spring for preventing accidental opening movement and with an elongate link for releasing the locking spring. A pull tab pivotally connected with the link is movable between a locked position and an operative position wherein the link is moved to abut the locking spring and move a locking end thereof to an unlocked condition. The slider assembly is particularly useful with slide fasteners of the concealed type in that the slider assembly is substantially hidden from view in locked position.
Abstract:
Gapped and cleaned slide fastener chains including a pair of carrier tapes having their inner edges folded upon themselves to provide a seam-like appearance and having a plurality of filamentary stringers attached to the folded portions of the carrier tape at intervals separated by gapped and cleaned areas with stitching threads securing the stringers to the folded portions and running continuously through the gapped and cleaned areas. A method of making gapped and cleaned seam-type slide fastener chain of the above described type including supporting the slide fastener chain with the filamentary stringers exposed, positioned a plurality of vibrating heads over the exposed stringers in frictional engagement therewith, reciprocating the vibrating heads in a transverse direction relative to the slide fastener chain, and moving the slide fastener chain such that the filamentary stringers sequentially pass under each of the vibrating heads. Apparatus for making gapped and cleaned seamtype slide fastener chain of the above described type includes a guide for supporting the slide fastener chain, a plurality of vibrating heads disposed over the chain in frictional engagement with the filamentary stringers, drive rollers cooperating with the guide for moving the slide fastener chain such that stringers sequentially pass under each of the vibrating heads, and a vibrator for reciprocating the vibrating heads relative to the slide fastener chain to remove severed portions of the filamentary stringers.
Abstract:
A method of forming an end stop for a slide fastener including folding the slide fastener to have a T-configuration exposing the undersides of the folded portions, disposing fusible material in cavities below the exposed undersides and fusing the material to the undersides of the folded portions to form a separate stop member on either side of the slide fastener.
Abstract:
A seam type closure for a slide fastener device having a stringer of filamentary material constructed with a series of head portions interconnected with a series of heel portions by a plurality of leg elements, and having a carrier tape secured to leg elements by stitching threads which pass through a layer of the carrier tape that is disposed to overlie only one of each pair of the leg elements.
Abstract:
Apparatus for forming a slide fastener having terminal elements reduced in size relative to the remaining fastener elements and two stop members adjacent the terminal fastener elements each being formed from a mass of fusible material fused onto the slide fastener including a support block having parallel channels for receiving separate slide fastener tapes, a forming anvil having a pair of spaced legs movable in the channels to capture the terminal fastener elements in cavities therein, a source for supplying ultrasonic energy to the forming anvil to reduce the size of the terminal fastener elements, a forming block supporting the separated slide fastener tapes adjacent cavities defined therein by another forming anvil, a forming member engaging the forming block to move the forming block relative to the other forming anvil and shear blanks of fusible material in the cavities, and a source for supplying ultrasonic energy to the forming member to fuse the blanks onto the slide fastener tapes to form separate stop members.