System for preparing highly coherent air jet textured yarn

In a system for texturing one or more yarns that includes a source of supply for said yarns, a yarn treating jet positioned between a feed roll and a nip roll through which yarn passes for treating with pressurized fluid and means for taking yarn up onto a package under tension, said jet including a body having inlet and outlet ends connected by a central bore along a central axis, means for introducing pressurized gas through a gas inlet into said bore between said ends to contact yarn passing through the jet at a location in said bore, said yarn and said gas following a path from said outlet end of said jet, the improvement comprising:

• a baffle located adjacent the yarn outlet end of the jet, said baffle having a peripheral surface, the portion of said surface nearest said outlet end being a distance of 0.1 to 4.0 minimum diameters of the bore downstream of said location, the portion of said surface nearest said central axis being a distance of from 0.7 to 2.5 of said minimum diameters from said central axis said baffle providing a guiding surface means for said yarn for sharply changing direction of said yarn so as to a bend and for directing the yarn back through said gas flowing in said path after said yarn leaves the outlet end of the jet onto the guiding surfaces means of the baffle and back through the gas following in said path toward said means for taking yarn up onto a package.