| 摘要 |
1,227,923. Slicking clasp fasteners. SUPLA ETABS. 1 May, 1968 [27 May, 1968], No. 22355/69. Heading E2S. Individual plastics sliding clasp fastener elements 12 are attached to the stringer tape 4 by forcing arms 14 through the tape, bending arms 13 and 14 over and welding them together. The elements are punched from a strip 6 which is advanced intermittently, the stringer is advanced intermittently at right angles to the strip, press 16 forces the tape onto arm 14a (Fig. 3). |
