| 摘要 |
A slide (13) slidably mounted on an arm (11) secured to an indexing plate (12) has a slider seat (15) for supporting thereon a slider body (16) with its pull tab (19) inserted in a slot (18) defined between the slide (13) and the arm (11). The slider pull tab (19) is immovably held in the slot (18) by a ball (27) mounted in the arm (11) and spring-biased into an aperture (25) in the pull tab (19). Upon holding of the pull tab (19), the slide (13) is slightly moved under the resiliency of a spring (22) to lift the slider body (16) until a locking pawl (20a) to which the pull tab (19) is connected is withdrawn out of a slider guide channel (21). A block (31) mounted on a fixed frame (32) contains a spring-biased presser (34) which, upon lateral alignment with the spring-biased ball (27), forces the ball (27) into locking engagement with the pull tab (19) in the slot (18), thereby locking the slider (17) for application to a pair of sliding clasp fastener stringers. |
