Method of forming coupling head portions in production of...

B - Operations – Transporting – 29 – D

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B29D 5/04 (2006.01) B29D 5/06 (2006.01)

Patent

CA 2037149

ABSTRACT OF THE DISCLOSURE 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.

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