Crimped thermoplastic filament

Details Crimped thermoplastic filament Crimped thermoplastic filament

1977-01-10

1983-03-08

Mackey, Robert

Stock material or miscellaneous articles

Coated or structually defined flake, particle, cell, strand,...

Rod, strand, filament or fiber

D02G 322

Patent

active

043761526

ABSTRACT:
A crimped thermoplastic filament which may be used in a separable hook and loop area fastener, preferably of nylon or the like, is permanently crimped into a zig-zag sawtooth configuration, by passing the same between a pair of oppositely rotating sawtooth forming rolls. The continuous filament is turned back on itself at acute angles in its zig-zag form. The cut ends of the filament present a plurality of zig-zag, hook like formations.

REFERENCES:
patent: 2090669 (1937-08-01), Dreyfus et al.
patent: 2751661 (1956-06-01), Shattuck
patent: 2971558 (1961-02-01), Vicknair, Jr.
patent: 3119191 (1964-01-01), Vitzthum
patent: 3568277 (1971-03-01), Mattingly

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