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Title: Apparatus for producing fluid jet teased yarns from short/medium staple multifiber spun yarns
Claims: What I claim is: 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. 2. Apparatus for fluid jet teasing multifiber spun yarn as defined in claim 1, wherein said first vortex generating fluid jet passage is directed laterally to one side of the yarn feed axis directing the rotating forces of the vortex opposite to the predetermined twist direction of the yarn. 3. Apparatus for fluid jet teasing multifiber spun yarn as defined in claim 1, wherein said turbulence chamber is of substantially cylindrical configuration concentric with the yarn feed path and is bounded by annular upstream and downstream end walls concentrically surrounding the respective inlet and outlet passages, and said turbulence generating fluid jet passages having their outlet ends opening through said upstream end wall of the turbulence chamber. 4. Apparatus for fluid jet teasing multifiber spun yarn as defined in claim 1, wherein said turbulence chamber is of substantially cylindrical configuration concentric with the yarn feed path and of shorter axial length than the diameter of said inlet yarn passage, and is bounded by annular upstream and downstream end walls concentrically surrounding the respective inlet and outlet passages, and said turbulence generating fluid jet passages having their outlet ends opening through said upstream end wall of the turbulence chamber. 5. Apparatus for fluid jet teasing multifiber spun yarn as defined in claim 2, wherein said turbulence chamber is of substantially cylindrical configuration concentric with the yarn feed path and is bounded by annular upstream and downstream end walls concentrically surrounding the respective inlet and outlet passages, and said turbulence generating fluid jet passages having their outlet ends opening through said upstream end wall of the turbulence chamber. 6. Apparatus for fluid jet teasing multifiber spun yarn as defined in claim 2, wherein said turbulence chamber is of substantially cylindrical configuration concentric with the yarn feed path and of shorter axial length than the diameter of said inlet yarn passage, and is bounded by annular upstream and downstream end walls concentrically surrounding the respective inlet and outlet passages, and said turbulence generating fluid jet passages having their outlet ends opening through said upstream end wall of the turbulence chamber. 7. Apparatus for fluid jet teasing multifiber spun yarn as defined in claim 1, wherein said housing is provided with a jet nozzle member removably supported therein having an elongated hollow inlet tunnel portion defining said inlet yarn passage extending from the inlet end of the housing and having an enlarged diameter head portion adjacent its downstream end terminating in a flat downstream face lying in a plane perpendicular to the yarn feed axis forming the upstream boundary wall of said turbulence chamber, said enlarged diameter head portion having said vortex generating fluid jet passage and said turbulence generating fluid jet passages extending through said head portion with the discharge end of the vortex generating passage opening through the side of the inlet yarn passage spaced upstream from said downstream face. 8. Apparatus for fluid jet teasing multifiber spun yarn as defined in claim 1, wherein said housing is provided with a jet nozzle member removably supported therein having an elongated hollow inlet tunnel portion defining said inlet yarn passage extending from the inlet end of the housing and having an enlarged diameter head portion adjacent its downstream end terminating in a flat downstream face lying in a plane perpendicular to the yarn feed axis forming the upstream boundary wall of said turbulence chamber, said enlarged diameter head portion having said vortex generating fluid jet passage and said turbulence generating fluid jet passages extending through said head portion with the discharge end of the vortex generating passage opening through the side of the inlet yarn passage spaced upstream from said downstream face and the discharge ends of said turbulence generating jet passages opening through said downstream face at circumferentially spaced locations concentric with the yarn axis. 9. Apparatus for fluid jet teasing multifiber spun yarn as defined in claim 1, wherein said housing is provided with a jet nozzle member removably supported therein having an elongated hollow inlet tunnel portion defining said inlet yarn passage extending from the inlet end of the housing and having an enlarged diameter head portion adjacent its downstream end terminating in a flat downstream face lying in a plane perpendicular to the yarn feed axis forming the upstream boundary wall of said turbulence chamber, said enlarged diameter head portion having said vortex generating fluid jet passage and said turbulence generating fluid jet passages extending through said head portion with the discharge end of the vortex generating passage opening through the side of the inlet yarn passage spaced upstream from said downstream face and the discharge ends of said turbulence generating jet passages opening through said downstream face at circumferentially spaced locations concentric with the yarn axis and closely adjacent the perimeter of the outlet yarn passage at the upstream end thereof. 10. Apparatus for fluid jet teasing multifiber spun yarn as defined in claim 1, wherein said housing is provided with a jet nozzle member removably supported therein having an elongated hollow inlet tunnel portion defining said inlet yarn passage extending from the inlet end of the housing and having an enlarged diameter head portion adjacent its downstream end terminating in a flat downstream face lying in a plane perpendicular to the yarn feed axis forming the upstream boundary wall of said turbulence chamber, said enlarged diameter head portion having said vortex generating fluid jet passage and said turbulence generating fluid jet passages extending through said head portion with the discharge end of the vortex generating passage opening through the side of the inlet yarn passage spaced upstream from said downstream face and the discharge ends of said turbulence generating jet passages opening through said downstream face at circumferentially spaced locations concentric with the yarn axis and closely adjacent the perimeter of the outlet yarn passage at the upstream end thereof, the turbulence chamber having a downstream bounding wall of flat annular planiform configuration outwardly surrounding the outlet yarn passage and paralleling and closely adjacent the upstream bounding wall in the path of the jets issuing from the turbulence generating jet passages. 11. Apparatus for fluid jet teasing multifiber spun yarn as defined in claim 4, wherein said housing is provided with a jet nozzle member removably supported therein having an elongated hollow inlet tunnel portion defining said inlet yarn passage extending from the inlet end of the housing and having an enlarged diameter head portion adjacent its downstream end terminating in a flat downstream face lying in a plane perpendicular to the yarn feed axis forming the upstream boundary wall of said turbulence chamber, said enlarged diameter head portion having said vortex generating fluid jet passage and said turbulence generating fluid jet passages extending through said head portion with the discharge end of the vortex generating passage opening through the side of the inlet yarn passage spaced upstream from said downstream face. 12. Apparatus for fluid yet teasing multifiber spun yarn as defined in claim 4, wherein said housing is provided with a jet nozzle member removably supported therein having an elongated hollow inlet tunnel portion defining said inlet yarn passage extending from the inlet end of the housing and having an enlarged diameter head portion adjacent its downstream end terminating in a flat downstream face lying in a plane perpendicular to the yarn feed axis forming the upstream boundary wall of said turbulence chamber, said enlarged diameter head portion having said vortex generating fluid jet passage and said turbulence generating fluid jet passages extending through said head portion with the discharge end of the vortex generating passage opening through the side of the inlet yarn passage spaced upstream from said downstream face and the discharge ends of said turbulence generating jet passages opening through said downstream face at circumferentially spaced locations concentric with the yarn axis. 13. Apparatus for fluid jet teasing multifiber spun yarn as defined in claim 4, wherein said housing is provided with a jet nozzle member removably supported therein having an elongated hollow inlet tunnel portion defining said inlet yarn passage extending from the inlet end of the housing and having an enlarged diameter head portion adjacent its downstream end terminating in a flat downstream face lying in a plane perpendicular to the yarn feed axis forming the upstream boundary wall of said turbulence chamber, said enlarged diameter head portion having said vortex generating fluid jet passage and said turbulence generating fluid jet passages extending through said head portion with the discharge end of the vortex generating passage opening through the side of the inlet yarn passage spaced upstream from said downstream face and the discharge ends of said turbulence generating jet passages opening through said downstream face at circumferentially spaced locations concentric with the yarn axis and closely adjacent the perimeter of the outlet yarn passage at the upstream end thereof. 14. Apparatus for fluid jet teasing multifiber spun yarn as defined in claim 4, wherein said housing is provided with a jet nozzle member removably supported therein having an elongated hollow inlet tunnel portion defining said inlet yarn passage extending from the inlet end of the housing and having an enlarged diameter head portion adjacent its downstream end terminating in a flat downstream face lying in a plane perpendicular to the yarn feed axis forming the upstream boundary wall of said turbulence chamber, said enlarged diameter head portion having said vortex generating fluid jet passage and said turbulence generating fluid jet passages extending through said head portion with the discharge end of the vortex generating passage opening through the side of the inlet yarn passage spaced upstream from said downstream face and the discharge ends of said turbulence generating jet passages opening through said downstream face at circumferentially spaced locations concentric with the yarn axis and closely adjacent the perimeter of the outlet yarn passage at the upstream end thereof, the turbulence chamber having a downstream bounding wall of flat annular planiform configuration outwardly surrounding the outlet yarn passage and paralleling and closely adjacent the upstream bounding wall in the path of the jets issuing from the turbulence generating jet passages. 15. Apparatus for fluid jet teasing multifiber spun yarn as defined in claim 1, including a variable restrictor member supported for movement from a side of said inlet yarn passage transversely of the yarn axis to penetrate various distances into the inlet yarn passage toward the center thereof at a location upstream of the vortex generating jet passage, and adjustment means for adjusting the amount of penetration of the restrictor member into the inlet yarn passage to provide a selected restriction to fluid flow upstream through the inlet yarn passage and to bear against the yarn passing therethrough and serve as a false twist holder. 16. Apparatus for fluid jet teasing multifiber spun yarn as defined in claim 4, including a variable restrictor member supported for movement from a side of said inlet yarn passage transversely of the yarn axis to penetrate various distances into the inlet yarn passage toward the center thereof at a location upstream of the vortex generating jet passage, and adjustment means for adjusting the amount of penetration of the restrictor member into the inlet yarn passage to provide a selected restriction to fluid flow upstream through the inlet yarn passage and to bear against the yarn passing therethrough and serve as a false twist holder. 17. Apparatus for fluid jet teasing multifiber spun yarn as defined in claim 15, wherein said restrictor member is an elongated pressure bar supported for movement into the inlet yarn passage along a plane transverse to the yarn axis about a pivot spaced laterally from the inlet yarn passage, the housing having a transverse slot intercepting the inlet yarn passage through which the pressure bar extends. 18. Apparatus for fluid jet teasing multifiber spun yarn as defined in claim 16, wherein said restrictor member is an elongated pressure bar supported for movement into the inlet yarn passage along a plane transverse to the yarn axis about a pivot spaced laterally from the inlet yarn passage, the housing having a transverse slot intercepting the inlet yarn passage through which the pressure bar extends. 19. Apparatus for fluid jet teasing multifiber spun yarn as defined in claim 1, including a pivoted air flow restrictor supported in said housing to penetrate various distances transversely into said outlet yarn passage from a side thereof to act as a barrier against outcoming fluid and vary the teasing effect produced by the fluid jets. 20. Apparatus for fluid jet teasing multifiber spun yarn as defined in claim 4, including a pivoted air flow restrictor supported in said housing to penetrate various distances transversely into said outlet yarn passage from a side thereof to act as a barrier against outcoming fluid and vary the teasing effect produced by the fluid jets. 21. Apparatus for fluid jet teasing spun yarn as defined in claim 1, wherein said first vortex generating air jet passage is inclined at a first jet angle to the yarn feed axis in a downstream converging relation therewith, said first jet angle being an acute angle greater than the angles of the turbulence generating jet passages. 22. Apparatus for fluid jet teasing spun yarn as defined in claim 7, wherein said turbulence chamber is of substantially cylindrical configuration concentric with the yarn feed path and of shorter axial length than the diameter of said inlet and the downstream face of said nozzle member providing an annular upstream end wall for the turbulence chamber concentrically surrounding the yarn passages therethrough, and said turbulence generating fluid jet passages having their outlet ends opening through said upstream wall of the turbulence chamber. 23. Apparatus for fluid jet teasing multifiber spun yarn as defined in claim 7, including a variable restrictor member supported for movement from a side of said yarn inlet tunnel portion of said nozzle member transversely of the yarn axis to penetrate various distances into the inlet tunnel portion toward the center thereof at a location upstream of the vortex generating jet passage, and adjustment means for adjusting the amount of penetration of the restrictor member into the yarn inlet tunnel portion to provide a selected restriction to fluid flow upstream therethrough and to bear against the yarn passing therethrough and serve as a false twist holder. 24. Apparatus for fluid jet teasing multifiber spun yarn as defined in claim 10, including a variable restrictor member supported for movement from a side of said yarn inlet tunnel portion of said nozzle member transversely of the yarn axis to penetrate various distances into the inlet tunnel portion toward the center thereof at a location upstream of the vortex generating jet passage, and adjustment means for adjusting the amount of penetration of the restrictor member into the yarn inlet tunnel portion to provide a selected restriction to fluid flow upstream therethrough and to bear against the yarn passing therethrough and serve as a false twist holder. 25. Apparatus for fluid jet teasing multifiber spun yarn as defined in claim 23, wherein said restrictor member is an elongated pressure bar supported for movement into the inlet tunnel portion along a plane transverse to the yarn axis about a pivot spaced laterally from the nozzle member, the nozzle member having a transverse slot intercepting the inlet tunnel portion through which the pressure bar extends. 26. Apparatus for fluid jet teasing multifiber spun yarn as defined in claim 7, including a pivoted air flow restrictor supported in said housing to penetrate various distances transversely into said outlet yarn passage from a side thereof to act as a barrier against outcoming fluid and vary the teasing effect produced by the fluid jets. Other info: Inventors: Trifunovic, Alexander L. (Burlington, NC, US) Application Number: 821406 Filing Date: 1977-08-03 Publication_date: 1979-02-27 Assignee: Glen Raven Mills, Inc. (Glen Raven, NC) Primary Class(es): 28/271 28/273, 57/236, 57/239, 57/254, 57/333 Other Classes: US Patent Ref:
Other Refs: Primary Examiner: Schroeder, Werner H. Assistant Examiner: Falik, Andrew M. Attorney: Mason, Fenwick & Lawrence |
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