Abstract: In manufacturing slide fasteners, especially fastener elements, an elongated wire of a generally Y-shape cross section with attaching legs shaped into a generally C form by rolling, is supplied intermittently at a predetermined pitch and is then cut into slices of element blanks having a predetermined thickness, and a protuberance is formed on the coupling head of each of the successive element blanks. Then, the generally C-shape attaching legs are calked from opposite sides to mount the fastener elements on a fastener tape and, at the same time, the generally right-angled cut edges of the attaching legs are shaped into a smooth arcuate profile as pressed by a calking surface of a calking punch.

Abstract: A method and apparatus for forming a slide-fastener coupling element from a metal wire having a substantially Y-shaped cross section wherein a blank piece is cut or sliced off from the metal wire by a co-action between a cutoff die and a cutoff punch, and substantially at the same time, the metal wire is chamfered along a next cutting line by a chamfering edge so as to form a substantially V-shaped groove extending in and along the peripheral surface of a head portion of the metal wire and the outside surface of each of two opposed leg portion of the metal wire. The next slicing operation produces a blank piece which is already chamfered at its upper and lower peripheral edges extending along the peripheral surface of the head portion and the outside surfaces of respective leg portions of the blank piece.

Abstract: As it is intermittently supplied, a blank wire having a generally Y-shape cross section is cut into slices of a predetermined thickness by a cutting punch, which is fixed to the frame, and a coacting cutting die, which is reciprocatingly movable in the cutting direction. Then a bulge is formed on the head portion of the cut coupling element by a bulge forming die, which is connected with the forward end in stroke direction of the cutting die, and a coacting bulge forming punch, which is movable upwardly and downwardly. The cutting punch is equipped with preventing means on the upper side of the end of a blade for preventing the cut coupling element from jumping up from the blade, so that a bulge can be formed on the head portion reliably, without giving any damage to peripheral equipments.

Abstract: In a slide fastener coupling element forming apparatus, a blank wire of a generally Y-shape cross section intermittently supplied at a predetermined pitch is cut off into pieces of a predetermined thickness by a fixed cutting punch and a reciprocating cutting die, and then a bulge for the head portion of a coupling element is formed by a forming die and a forming punch movable upwardly and downwardly to coact with the forming die. The forming die is located to be connected with the forward end in the stroke direction of the cutting die, and the forming punch is located upwardly of the bulge forming station. Then the opposite leg portions of a coupling element are pushed out of the mold of the forming die by a vertically movable ejector pin located under the leg portions on the forming die to discharge the formed coupling element from the forming die.

Abstract: In an apparatus for forming a row of zigzag coupling elements, a winding unit includes a guide plate having a guide hole through which a monofilament is supplied onto a periphery of a continuously rotating die wheel. The guide plate is driven by two separate drive mechanisms, for lateral reciprocating movement and tangential reciprocating movement, respectively, with respect to the die wheel periphery so that the guide hole traces a horizontal figure-eight curve to thereby wind the monofilament alternately around a pair of rows of circumferentially staggered pins, on the die wheel periphery.

Abstract: An apparatus of manufacturing a slide fastener with a separable end stop according to the invention includes: a step which is carried out while separating engaged stringers of continuous length which have space portions disposed at regular intervals in their longitudinal directions and which consists of conveying the separated stringers through an injection molding station; suspending the operation of conveying the stringers in such a manner that one of the space portions is disposed at the injection molding station; and simultaneously injection-molding upper stops and pins which constitute a separable end stop on the stringers at each end of the space portion.

Abstract: An apparatus, for automatically processing a slide fastener chain to which a succession of fly strips is attached, comprises an intermittently operative feed unit for feeding the fastener chain along a longitudinal path, a first cutting unit disposed upstream of the feed unit for forming element-free gaps in the fastener chain near or at ends of successive fly strips, and a second cutting unit disposed downstream of the feed unit for severing the fastener chain at such element-free portions. The apparatus also includes a measuring unit disposed upstream of the first cutting unit for measuring the amount of the fastener chain having been fed by the feed unit, and a detector disposed between the first cutting unit and the measuring unit for detecting ends of successive fly strips.

Abstract: Gaps in molded polymer fastening elements secured to inner edge portions of coplanar support tapes are formed by cutting legs of the coupling elements in planes coplanar with the inner edge portions of the support tapes leaving remanents of the molded polymer attached to the tapes along the gap.

Abstract: Disclosed herein is an apparatus for forming and planting fastener elements comprising a ram mounted on a frame for reciprocal movement and having a cutting die provided with a passage for a wire to be used for elements and a forming die for forming an engageable head in an element, a cutting punch for cutting out an element from the wire, a forming punch for forming the engageable head in cooperation with the forming die and at least one side punch for planting the element on a fastener tape. The apparatus is characterized in that cam means for driving the ram, forming punch and side punch are formed on a common output drive shaft and arranged so that the ram dwells for a predetermined time at the end of each forward and backward movement and the side punch secures the element to the tape during the dwell of the ram at the end of its forward movement and the forming punch is actuated during the dwell of the ram at the end of its backward movement.

Abstract: A clamping unit has a pair of clamping jaws movable toward each other by manually operable threaded rods to clamp a slotted hollow body such as a separable bottom stop member for a separable slide fastener on a beaded edge positioned between the clamping jaws. A central presser presses the slotted hollow body against shoulders of the clamping jaws to shape the slotted hollow body. The clamping jaws and the presser are adjustably limited in their coacting movement so as to handle slotted hollow bodies of various sizes. The clamping jaws and the presser are spring-loaded so that they will be automatically retracted out of an operating position upon release.

Abstract: In the apparatus for forming a space in and simultaneously fixing a stop to a fastener chain of this invention, a casing is provided with a tubular frame portion in which a punch holder having a space punch and a driver punch is received for sliding movement. This apparatus further includes a cutting punch between the driver punch and the inner wall of the tubular frame portion. When the punch holder descends, the cutting punch cuts a stop forming wire and forms the cut wire length into a stop preform in cooperation with an anvil. As the punch holder further descends, the driver punch drives the stop preform into the tapes of the chain and simultaneously the space punch forms a space in the chain. During this operation, the cutting punch rises relative to the punch holder so as not to damage the tapes.

Abstract: An apparatus for manufacturing slide fastener stringer pairs of a slide fastener length from a pair of continuous slide fastener stringers. The apparatus comprises means for severing the continuous slide fastener stringers transversely across one of element-free portions, means for pairing the severed slide fastener stringers, and gripping means reciprocable between a first position adjacent to the severing means and a second position disposed away from the first position for advancing the slide fastener stringers along a longitudinal path. The gripping means includes a pair of grippers movable toward each other for introducing the slide fastener stringers into the pairing means.

Abstract: For obtaining the spacing of continuously manufactured zip fasteners by removing in a single operation the connecting members over a certain length, a device is provided which comprises a die and a stepped punch with three rectangular sections. The punch is guided in a tape pressure which holds at standstill the tapes of the fastener coupled by means of the connecting members against the die. The three sections of the stopped punch have dimensions proportioned with respect to the dimensions of the connecting members to be removed.

Abstract: A weaving process and apparatus for producing a slide fastener from two continuous plastic filaments (synthetic-resin monofilament), each with a multiplicity of generally helicoidal coupling elements for interlocking with the coupling elements of the opposite filament, each filament being woven integral with the threads of its respective support tape to form a tape-like unit. Each coupling element has a coupling head on a loop and a pair of shanks terminating in bight portions which connect elements of the same tape-like unit. The shanks of each coupling element, which separate the bights from the loops, are held in close abutment by warp threads, with or without weft threads which pass over and under the successive paired abutting shanks of adjacent elements. Even stronger bracing can be obtained with bulbous projections on the shanks and bights, and by extending the coupling elements the entire width of the tape-like unit, replacing all or part of the weft threads.