False twist device
AssigneeHigh-Speed Spinning, Inc.
InventorDouglas G. Hart
Life of this patent
Estimating the term…
Abstract
An apparatus for inserting a false twist in roving or yarn as the strand or strands of fibers are fed from between a pair of front rolls to a takeup device. The apparatus includes a rotor rotatably carried in an enclosing casing. A plurality of circumferentially spaced air entrapping members is provided in the perimeter of the rotor so that upon applying pressurized air to the members, the rotor is driven. A yarn conveying tube extends axially through the rotor and is fixed thereto for being rotated therewith. A portion of the yarn conveying tube is radially disposed from the rotational axis of the rotor so that as the yarn flows through the rotating tube, a false twist is inserted in the yarn from the tube up to the nip of the front rolls.
Claims8
An apparatus for inserting a false twist in a strand of fibers as said strand is fed from between a pair of feed rolls to a takeup device, said apparatus comprising:
- a casing,
- a rotor rotatably carried in said casing;
- a plurality of circumferentially spaced air entrapping members provided on said rotor;
- a strand conveying tube extending axially through said casing and said rotor and being fixed to said rotor for rotation therewith;
- a portion of said strand conveying tube being radially disposed from the rotational axis of said rotor;
- said strand extending from between said pair of feed rolls through said strand conveying tube to said takeup device;
- an upper portion of said strand conveying tube being in axial alignment with said rotor then has an intermediate portion that assumes an arcuate semi-circular configuration which is radially displaced from said axis and vertically positioned above said rotor and then has a lower portion extending through said rotor that is in axial alignment with said rotor;
- and
- means for directing pressurized air into said air entrapping members provided on said rotor causing said rotor to be rotated whereby a false twist is imparted to said strand of fibers as said strand of fibers travels from said rolls to said takeup device.
An apparatus for inserting a false twist in a strand of fibers as said strand is fed from between a pair of feed rolls to a takeup device, said apparatus comprising:
- a casing;
- a rotor rotatably carried in said casing;
- a plurality of circumferentially spaced air entrapping members provided on said rotor;
- a strand conveying tube extending axially through said casing and said rotor and being fixed to said rotor for rotation therewith;
- a portion of said strand conveying tube being radially disposed from the rotational axis of said rotor;
- an upper entrance of said yarn conveying tube being radially displaced from the axis of said rotor and said tube extends radially inwardly from said entrance to a point where it is in axial alignment with said rotor;
- said strand extending from between said pair of feed rolls through said strand conveying tube to said takeup device;
- and
- means for directing pressurized air into said air entrapping members provided on said rotor causing said rotor to be rotated whereby a false twist is imparted to said strand of fibers as said strand of fibers travels from said rolls to said takeup device.
An apparatus for inserting a false twist in a strand of fibers as said strand is fed from between a pair of feed rolls to a takeup device, said apparatus comprising:
- a casing;
- a rotor rotatably carried in said casing;
- a plurality of circumferentially spaced air entrapping members provided on said rotor;
- a strand conveying tube extending axially through said casing and said rotor and being fixed to said rotor for rotation therewith;
- a portion of said strand conveying tube being radially disposed from the rotational axis of said rotor;
- said strand extending from between said pair of feed rolls through said strand conveying tube to said takeup device;
- a brake means carried by said casing engaging said rotor upon being activated for stopping said rotor while said pressurized air is being directed into said air entrapping members;
- and
- means for directing pressurized air into said air entrapping members provided on said rotor causing said rotor to be rotated whereby a false twist is imparted to said strand of fibers as said strand of fibers travels from said rolls to said takeup device.
An apparatus for inserting a false twist in a strand of fibers as said strand is fed from between a pair of feed rolls to a takeup device, said apparatus comprising:
- a casing;
- a rotor rotatably carried in said casing;
- a plurality of circumferentially spaced air entrapping members provided on said rotor;
- a strand conveying tube extending axially through said casing and said rotor and being fixed to said rotor for rotation therewith;
- a portion of said strand conveying tube being radially disposed from the rotational axis of said rotor;
- a cylindrical member carried on top of said rotor;
- said radially disposed portion of said strand conveying tube extending into said cylindrical member;
- a filler material carried in said cylindrical member encapsulating said radially disposed portion of said strand conveying tube;
- means carried by said cylindrical member for balancing said strand conveying tube;
- said strand extending from between said pair of feed rolls through said strand conveying tube to said takeup device;
- and
- means for directing pressurized air into said air entrapping members provided on said rotor causing said rotor to be rotated whereby a false twist is imparted to said strand of fibers as said strand of fibers travels from said rolls to said takeup device.
An apparatus for inserting a false twist in a strand of fibers as said strand is fed from between a pair of feed rolls to a takeup device, said apparatus comprising:
- a housing;
- a rotor rotatably carried in said housing;
- a strand conveying tube extending axially through said housing and said rotor and being fixed to said rotor for rotation therewith;
- a portion of said strand conveying tube being radially disposed from the rotational axis of said rotor;
- said radially disposed portion of said strand conveying tube being positioned between said rotor and said feed rolls;
- said strand extending from between said pair of feed rolls through said strand conveying tube to said takeup device;
- a source of power;
- a power transmission means;
- a gap provided between said power transmission means and said rotor, and
- a power medium flowing from said source of power through said power transmission means and said gap driving said rotor;
- whereby a false twist is imparted to said strand of fibers as said strand of fibers travels from said rolls to said takeup device.
Dependencies are inferred from the claim text.