Apparatus for the production of fixed point multifilament yarns

摘要

PCT No. PCT/EP81/00123 Sec. 371 Date Mar. 25, 1982 Sec. 102(e) Date Mar. 25, 1982 PCT Filed Aug. 13, 1981 PCT Pub. No. WO82/00668 PCT Pub. Date Mar. 4, 1982.Apparatus for the production of fixed point multifilament yarns with a whirling unit provided with a passage (15) through which the filaments to be whirled are driven and whirled together as at least one blasting nozzle injects gas into said passage. To obtain high filament feed rates and provide for the desired fixed points the blasting nozzle is in the form of a De Laval nozzle (20) whose jet is directed at an angle or perpendicularly to the longitudinal direction of the passage (15).