| 摘要 |
1,140,664. Moulding sliding clasp fasteners. H. HANSEN. 25 Feb., 1966 [28 Dec., 1965] No. 8505/66. Heading B5A. [Also in Division E2] A separable sliding clasp fastener of the kind comprising two rows 1, 2 of coupling links secured to two stringer tapes respectively, each of said rows being constituted by a succession of loops formed in a plastics monofilament, a sliding member for effecting the engagement and disengagement of the coupling links and a separable end stop located at one end of each of the rows of coupling links and having two channel-shaped parts 7, 8 by which the last loop at the said one end of each row is secured to the corresponding stringer tape, is characterized by the fact that each channel-shaped part has on the free edges of its side flanges teeth which are pressed through the corresponding stringer tape from the front side, bent round the rear side of the stringer tape and pressed into it, one of said parts carrying a connecting piece of the end stop, the connecting piece 21 having a socket 22 for receiving the other part. Each channel shaped part straddles a bead 5 or 6, the bead being produced by first applying reinforcing strips 27 and 28 (not shown) of thermoplastic material to respective sides of the pair of tapes, heat moulding the strip 27 to form the two beads and thereafter cutting through a web produced between the beads in the heat moulding operation. The parts 7 and 8 enable the fastener to be made in a fully automatic manner in a continuously progressive operation starting with a web of material which consists of two long lengths of tape, each tape carrying on one side a chain of the coupling links the chains being interconnected. In a first station gaps are cut in sequence in the chains of coupling links to produce the coupled rows for individual fasteners, then for each fastener, in the next station, the reinforcing strips 27 and 28 are applied and the beads 5 and 6 are formed by the heat moulding operation; in the following station the punching operation is performed by which the beads 5 and 6 are cut free from one another and at the same time a hole is formed in the tapes beyond the ends of the beads, in the next station the sliding member is mounted on the rows of coupling links by being passed through the hole and in the next following station top stops are applied; the next station fits the channel shaped parts 7 and 8 to the beads and the subsequent station clamps these to the tapes by bending the teeth; the connecting piece 21 is entered into the hole and slid on to the parts 7 and 8 in the next station and secured by a punching operation and in the final station two cuts are made through the tapes to sever the finished fastener from the tapes and to define the end of the next fastener. |
