Apparatus for producing fluid jet teased yarns from short/medium staple multifiber spun yarns

Claim 1

Apparatus for fluid jet teasing of short to medium staple multifiber spun yarn by impinging pressurized fluid jets on the spun yarn being fed along a feed path to produce vortex and turbulence effects at fluid jet stations serially arranged along the feed path and disarranging end portions of the fibers outwardly from the yarn axis producing a yarn having teased, hairy, fluffy, fuzzed character without loops resembling angora, alpaca and the like yarns, the spun yarn fed to the apparatus having a twist imparted to the fibers in a predetermined twist direction, the apparatus comprising an elongated housing having inlet and outlet ends to be positioned along the feed path for passage of the yarn with predetermined overfeed therethrough along a yarn feed axis, the housing having means therein defining an inlet yarn passage extending axially therethrough from the inlet end to an intermediate portion of the housing, means in said housing defining a turbulence chamber of larger diameter than said inlet yarn passage at said intermediate portion of the housing communicating with said inlet yarn passage, means defining an outlet yarn passage axially aligned with the inlet yarn passage and having a smaller diameter than the turbulence chamber for passage of yarn from the turbulence chamber through the outlet end of the housing, means defining a first vortex generating fluid jet passage communicating with said inlet yarn passage immediately upstream from said turbulence chamber defining a fluid vortex station for exerting forces on yarn entering the inlet end of the inlet yarn passage tending to suck the yarn into the inlet yarn passage and causing vortex action producing rotating forces on the yarn fibers in the feed passage about the yarn axis in a predetermined direction to tend to open up the fibers of the twisted yarn and place the yarn under fluid vortex positional control at the entrance to the turbulence chamber, and means defining a plurality of turbulence generating fluid jet passages opening up into said turbulence chamber along axes inclined to the yarn feed axis at similar angles converging in a downstream direction to create turbulent fluid forces in the turbulence chamber causing further opening and outward distortion of the yarn fibers to produce the teased, hairy, fluffy, fuzzed not-looped appearance, and means supplying pressurized fluid to said vortex generating fluid jet passage and to said turbulence generating jet passages.