Slide fastener elements and method and apparatus for forming...

A - Human Necessities – 44 – B

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A44B 19/24 (2006.01) A44B 19/42 (2006.01) A44B 19/46 (2006.01) B21B 1/16 (2006.01) B21C 37/04 (2006.01)

Patent

CA 2156354

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.

La fabrication de fermetures à glissière, et particulièrement la fabrication d'éléments d'assemblage, un fil de forme allongée et présentant une section transversale en forme de Y avec pattes de fixation présentant une configuration en forme de C est formée par laminage à débit intermittent et en longueurs prédéterminées avant d'être coupé en tranches d'une épaisseur prédéterminée; une protubérance est formée sur la tête d'accouplement de chacun des flans successifs. Par la suite, les pattes de fixation en forme de C sont étirées des côtés opposés pour monter les éléments d'assemblage sur un ruban de fixation et, en même temps, les bords à angle droit des pattes de fixation sont dotés d'un profil arrondi et uniforme par pressage dans une matrice.

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