Method for forming a row of slide fastener elements

Details Method for forming a row of slide fastener elements Method for forming a row of slide fastener elements

1998-03-11

1999-07-27

Echols, P. W.

Metal working

Method of mechanical manufacture

Of a slide fastener

B21D 5352

Patent

active

059269340

ABSTRACT:
In manufacturing slide fasteners, especially fastener elements, an elongated wire of a generally Y-shape cross section with attaching legs shaped into a generally C form by rolling, is supplied intermittently at a predetermined pitch and is then cut into slices of element blanks having a predetermined thickness, and a protuberance is formed on the coupling head of each of the successive element blanks. Then, the generally C-shape attaching legs are calked from opposite sides to mount the fastener elements on a fastener tape and, at the same time, the generally right-angled cut edges of the attaching legs are shaped into a smooth arcuate profile as pressed by a calking surface of a calking punch.

REFERENCES:
patent: 2116712 (1938-05-01), Prentice
patent: 2299606 (1942-10-01), Wintritz
patent: 2628400 (1953-02-01), Firing
patent: 3160948 (1964-12-01), Firing
patent: 5495655 (1996-03-01), Morioka

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