Metal working – Method of mechanical manufacture – Of a slide fastener
Patent
1979-10-02
1982-06-01
Combs, Ervin M.
Metal working
Method of mechanical manufacture
Of a slide fastener
29767, B21D 5356, B23P 1904
Patent
active
043320716
ABSTRACT:
An apparatus for attaching a pair of U-shaped end stops each having a pair of opposed clinching legs to the respective longitudinal marginal edge portions of a pair of slide fastener stringer tapes comprises a guide block provided with a pair of elongate slots in which are slideably mounted a pair of punches. The U-shaped end stops are slideably positioned in respective ones of the slots and are orientated such that the two legs are in slideable engagement with the slot walls and the ends of the legs face toward the pair of stringer tapes. The slots are provided with shoulders configured to engage with one of the legs of the end stops to effect turning of the end stops about the shoulders in response to movement of the end stops by the punches to thereby position the two legs of the U-shaped end stops on opposite sides of the stringer tape. Further movement of the punches effects clinching of the legs of the end stops to the stringer tapes. A method of attaching a pair of U-shaped end stops each having a pair of clinching legs to the respective longitudinal marginal edge portions of a pair of slide fastener stringer tapes comprises the steps of intermittently advancing the slide fastener stringer tapes lengthwise along a path of travel; delivering the U-shaped end stops toward the stringer tapes individually in a direction substantially normal to the path of travel of the stringer tapes with the end stop legs directed toward the path of travel; stopping the individual end stops short of the stringer tapes and retaining one of the legs of each end stop as an axis for rotation of the end stop; turning the individual end stops about one of its legs so as to place the legs of each end stop one over and the other below the longitudinal marginal edge portions of the stringer tapes with spaces left between both the legs and the longitudinal marginal edge portions; and clinching the legs about the longitudinal marginal edge portions while the stringer tapes are at rest.
REFERENCES:
patent: 3445912 (1969-05-01), Perlman
patent: 3504418 (1970-04-01), Perlman
patent: 3541662 (1970-11-01), Perlman
Adams Bruce L.
Burns Robert E.
Combs Ervin M.
Lobato Emmanuel J.
Yoshida Kogyo K.K.
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