Method and apparatus for providing space sections in a continuou

Details Method and apparatus for providing space sections in a continuou Method and apparatus for providing space sections in a continuou

1978-11-29

1980-11-11

Larson, Lowell A.

Metal working

Method of mechanical manufacture

Of a slide fastener

29770, B23P 1900

Patent

active

042324386

ABSTRACT:
A method and apparatus proposed for removing interlocking elements over a certain longitudinal area from a continuous slide fastener chain of the plastic filament coil type, and providing interlocking element-free space sections in the fastener chain, according to which the fastener chain is put on a die having a square recess in its surface, a punch having a cutter blade on its lower end is moved down to and press the fastener chain into the recess, whereby the filament coils are made to bend in the V-shape in the recess, the punch is further lowered to cut off the leg portions of the coils, allowing the head portions to remain exposed and raised above the surface of the fastener chain. The raised head portions can then easily and efficiently be removed by a picking-up means, such as a scraper.

REFERENCES:
patent: 3225430 (1965-12-01), Fasciano
patent: 3391441 (1968-07-01), Carlie
patent: 3812573 (1974-05-01), Fukuroi
patent: 3863323 (1975-02-01), Takamatsu

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