Method of forming coupling head portions in production of slide

Details Method of forming coupling head portions in production of slide Method of forming coupling head portions in production of slide

1991-03-26

1992-06-09

Echols, P. W.

Metal working

Method of mechanical manufacture

Of a slide fastener

24394, B21D 5352

Patent

active

051195348

ABSTRACT:
In a method of forming coupling head portions on a monofilament of thermoplastic synthetic resin for production of a slide fastener coupling element, the monofilament is stamped from one side to form recessed small-thickness portions bulging from the other side of the monofilament, and then the monofilament is bent at opposite ends of each of the recessed small-thickness portions in such a manner that the concave side of each small-thickness portions faces outwardly.

REFERENCES:
patent: 3047923 (1962-08-01), Wilcken
patent: 3168606 (1965-02-01), Burbank
patent: 3197537 (1965-07-01), Hansen
patent: 4325184 (1982-04-01), Omori

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