Method and apparatus for manufacturing slide fastener...

Details Method and apparatus for manufacturing slide fastener... Method and apparatus for manufacturing slide fastener...

B - Operations, Transporting

21

D

B21D 53/52 (2006.01) A44B 19/44 (2006.01) B21F 45/18 (2006.01)

Patent

CA 2099176

A blank wire of a generally Y-shape cross sec- tion is supplied intermittently at a predetermined pitch, during which the blank wire is successively cut transversely into slices of a predetermined thickness. A bulge is formed at a time for a head portion of each of the successive coupling elements and the resulting individual coupling element is collected. Subsequent- ly to the forming of the individual bulge, opposite leg portions of the individual coupling element are pre-clenched to such an extent as to prevent any crack from occurring in a possible surface-treated section of the coupling element when the opposite leg portions are clenched for attaching the coupling element to a slide fastener tape.

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