Method for manufacturing slide fastener coupling elements

Details Method for manufacturing slide fastener coupling elements Method for manufacturing slide fastener coupling elements

1993-06-25

1994-11-29

Bilinsky, Z. R.

Metal working

Method of mechanical manufacture

Of a slide fastener

29 332, 29769, B21D 5352

Patent

active

053677587

ABSTRACT:
A blank wire of a generally Y-shape cross section 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. Subsequently 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.

REFERENCES:
patent: 2125707 (1938-08-01), Anderson et al.
patent: 2294253 (1942-08-01), Taberlet
patent: 4550477 (1985-11-01), Iai
patent: 4974305 (1990-12-01), Matsuda
patent: 5007161 (1991-04-01), Matsuda

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