Method of and apparatus for manufacturing slide fastener couplin

Details Method of and apparatus for manufacturing slide fastener couplin Method of and apparatus for manufacturing slide fastener couplin

1982-05-07

1984-02-21

Goldberg, Howard N.

Metal working

Method of mechanical manufacture

Of a slide fastener

29766, 29769, B21D 5352, A41H 3706

Patent

active

044321260

ABSTRACT:
A method of and apparatus for manufacturing coupling elements, suitable for a two-way slide fastener, successively from a rod of metal of a generally Y-shaped cross section having a base, as a prospective coupling head, and a pair of diverging legs. As the rod is fed longitudinally stepwise, it is transversely sliced into a plurality of coupling element blanks, one at a time, on the backward stroke of relative movement of a coacting cutting die and punch. At the end of the backward stroke of the cutting die and punch, a chamfering surface on the cutting punch is forced against the base of the rod to form a chamfered portion thereon so that each sliced coupling element blank has the chamfered base. The chamfered base of each coupling element blank is then formed, by a coacting forming die and punch, into a final coupling head of one coupling element which head has a projection from one face and a socket in the other face at such a position that the chamfered portion is disposed around the socket.

REFERENCES:
patent: 2567914 (1951-09-01), Wintriss
patent: 2596888 (1952-05-01), Cohn
patent: 2734546 (1956-02-01), Firing
patent: 2763051 (1956-09-01), Firing
patent: 3068549 (1962-12-01), Firing
patent: 3091024 (1963-05-01), Poux
patent: 3187540 (1965-06-01), MacBroom
patent: 4387495 (1983-06-01), Moroika
patent: 4388751 (1983-06-01), Fukuroi

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