Abstract: The method and apparatus for injection molding of continuous molded products employs a single endless flexible mold band having multiple injection ports revolving in registration with a rotating cylindrical mold member. This cylindrical mold member comprises a wide wheel rim or a circumferential wall on a rotating drum. Continuous mold cavities extend in parallel relationship circumferentially around the periphery of the cylindrical mold member. Injection ports in the mold band are kept in alignment with these mold cavities by sprocket teeth of the mold member engaging with sprocket holes in margins of the band. Fluid plastic material (either thermoplastic material or thermosetting material) is injected through these ports into the mold cavities. When injecting thermoplastic material, heaters warm the cylindrical mold member and band prior to injection; then coolers chill them for cooling the thermoplastic material for solidifying it.

Abstract: A method is provided for making a hermaphrodite hook and loop fastener including the steps of molding a hook ribbon having mounting projections and shoulders on opposite sides of the hook ribbon, providing a separate flexible substrate, feeding a plurality of hook ribbons to a bonding station, orienting the hook ribbons with their hooks upstanding from the substrate and their mounting projections facing the substrate at the bonding station, pushing the shoulders of the hook ribbon toward the substrate thereby thrusting the mounting projections onto the substrate, and ultrasonically bonding the mounting projections to the substrate.

Abstract: U.S. Pat. No. 4,615,084 disclosed and claimed a method for making multiple-hook fasteners and the resulting multiple-hooks. A strand of stiffly flexible bendable settable polymeric plastic material is zig-zagged back and forth cross a centerline, with sharply doubled-back bends at each zig and zag. The present method enables the doubled-back bends in such a plastic monofilament to be shaped sharply by initially causing the strand to be nicked or scooped at predetermined intervals to predetermined depth and length by at least one laser beam. The pre-nicked strand is used by feeding it endwise at a predetermined feed rate into a zigzag station wherein it is confined and guided by side walls diverging in the downstream direction and appropriately configured to shape the pre-nicked strand into the desired zigzag configuration. In the zigzag station, its leading, i.e. downstream, portions are slowed down relative to the predetermined feed rate of its incoming, i.e.

Abstract: Apparatus for making multiple hook-fastener media in which many protruding hooks are formed at relatively high speed from suitable bendable and settable plastic material which may be different from the substrate to which these pre-formed hooks are subsequently bonded. Many rows of hooks are formed simultaneously, each row from a strand, for example, a monofilament of longitudinally oriented polymeric material. The formed strands are "set" into their multiple hook row configuration, and then these pre-formed rows of hooks are simultaneously bonded to the substrate. Thus, an attractive substrate of any reasonable width, for example, of three inches, six inches, a foot or a yard, may be used. The production apparatus enables the number of hooks per square inch, either longitudinally or laterally or both, to be adjusted while running.

Abstract: Multiple hook-fastener media in which many protruding hooks are formed at relatively high speed from suitable bendable and settable plastic material which may be different from the substrate to which these pre-formed hooks are subsequently bonded. Many rows of hooks are formed simultaneously, each row from a strand, for example, a monofilament of longitudinally oriented polymeric material. The formed strands are "set" into their multiple hook row configuration, and then these pre-formed rows of hooks are simultaneously bonded to the substrate. Thus, an attractive substrate of any reasonable width, for example, of three inches, six inches, a foot or a yard, may be used. The production method and system enable the number of hooks per square inch, either longitudinally or laterally or both, to be adjusted while running.