Fastener stringer with tubular filament element

Details Fastener stringer with tubular filament element Fastener stringer with tubular filament element

A - Human Necessities

44

B

24/47

A44B 19/02 (2006.01)

Patent

CA 1064227

INVENTOR: GEORGE B. MOERTEL TITLE: FASTENER STRINGER WITH TUBULAR FILAMENT ELEMENT ABSTRACT OF THE DISCLOSURE A slide fastener has coupling elements secured to adjacent edges of a pair of carrier tapes wherein each of the elements if formed from a tubular filament by plastic deformation of selected portions, thus defining head portions, leg portions and connecting portions wherein the tubular filament has a ratio of filament wall thickness divided by the average inside diameter in the range of about .65 to about 1.8. Such hollow filaments are formed into coupling elements by conventional techniques without spontaneous collapse or buckling as occurs with thin wall tubular filaments.

258535

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