GB1237837A - Sliding clasp fastener stringers - Google Patents

Abstract

1,237,837. Warp knitted fabrics. LIGHTNING FASTENERS Ltd. 22 June, 1970 [3 June, 1969], No. 27971/69. Headings D1C and D1K. [Also in Division E2] A warp-knitting machine for knitting sliding clasp fasteners comprises a trickplate 10 on which needles 11 are mounted for knitting a carrier tape 15, yarn guides 13 movable in known manner with respect to the needles 11 and a tubular guide 19 through which a series of coupling elements 16 which surrounds an inner textile cord 18 is fed to a position adjacent the edge of the tape 15. A needle 20 for sewing the elements 16 to the tape 15 is located at the front of the machine and is operated in synchronism with the needles 11 and guides 13 to pass in reciprocative manner through the plane of the needles 11 and carry binding thread 21 through the cord 18 and between adjacent coupling elements 16. As the needle is withdrawn from the cord 18, a loop 22 is formed above a needle 11a and as the needles 11 rise, needle 11a is inserted through and engages the loop 22 interlocking the loop with a yarn 14. In a second embodiment a series of meander coupling elements is fastened to the carrier tape by having the sewing needle (30), Fig. 2 (not shown) pass both in its axial direction and in a horizontal plane alternately to either side of braid (27), while in a third embodiment the tubular guide which feeds the elements and braid is oscillated while the sewing needle reciprocates along its axial direction only, Fig. 3 (not shown).