Process and apparatus for spinning staple fibers

Abstract

A process and apparatus for spinning staple fibers wherein a sliver is continuously delivered to a separation roller where individual fibers are separated from such sliver. The thus separated individual fibers are accelerated by means of an air current approximately to the peripheral velocity of the inner wall of a hollow body member, and then the individual fibers are delivered approximately tangentially to a quickly rotating hollow body member to form thereat a fiber ring, and finally, the yarn is axially withdrawn out of the fiber ring.

What is claimed is: 
     
       1. A process for spinning staple fibers comprising the steps of: a. continuously delivering a sliver to a separation roller,   b. separating individual fibers from said sliver in said separation roller,   c. accelerating the individual fibers by means of an air current surrounding these individual fibers approximately to the peripheral velocity of the inner wall of a .Iadd.quickly rotating .Iaddend.hollow body member prior to delivery of said individual fibers to said hollow body member,   d. then delivering said individual fibers approximately tangentially to the inner wall of .[.a.]. .Iadd.the .Iaddend.quickly rotating hollow body member and forming thereat a fiber ring,   e. and axially withdrawing a yarn out of said fiber ring.  .[.2. Apparatus for spinning staple fibers comprising a separation roller incorporating means for separating individual fibers from a sliver, a rotatable hollow body member for receiving the separated individual fibers, means for accelerating the individual fibers by means of their surrounding air prior to delivery to said rotatable hollow body member, and at least one rotatable acceleration roller for contributing to the acceleration of the individual fibers and surrounding air disposed between said separation roller and said hollow body member..]. .[.3. Apparatus for spinning staple fibers as defined in claim 2, wherein said acceleration roller is provided with needles..]. .[.4. Apparatus for spinning staple fibers as defined in claim 3, wherein said acceleration roller is provided with radial air passage means through which the air is conducted..]. .[.5. Apparatus for spinning staple fibers as defined in claim 2, further including an air channel disposed between said acceleration roller and said hollow body member, said air channel possessing a cross-section which narrows from said acceleration roller in the direction of said hollow body member.]. .[.6. Apparatus for spinning staple fibers comprising a separation roller incorporating means for separating individual fibers from a sliver, a rotatable hollow body member for receiving the separated individual fibers, means for accelerating the individual fibers by means of their surrounding air prior to delivery to said rotatable hollow body member, and an air channel for contributing to the acceleration of the individual fibers and surrounding air extending between said separation roller and said hollow body member, said air channel possessing a cross-section which narrows from said separation roller in the direction of said hollow body member..]. .Iadd. 7. Apparatus for spinning staple fibers comprising a separation roller incorporating means for separating individual fibers from a sliver, a rotatable hollow body member for receiving the separated individual fibers, a substantially V-shaped annular groove in said hollow member for collecting the individual fibers, one wall of said groove extending as a frontal wall inwardly towards the axis of rotation of the hollow body member, means for accelerating the individual fibers by means of their surrounding air prior to delivery to said rotatable hollow body member and at least one rotatable acceleration roller for contributing to the acceleration of the individual fibers and surrounding air disposed between said separation roller and said hollow body member, and a stationary air channel for feeding fibers to said hollow body member disposed between said acceleration roller and said hollow body member and having a discharge opening arranged for discharging the fibers into the groove from a side opposite said inwardly extending frontal wall. .Iaddend..Iadd. 8. Apparatus for spinning staple fibers as defined in claim 7, wherein said acceleration roller is provided with needles. .Iaddend..Iadd. 9. Apparatus for spinning staple fibers as defined in claim 8, wherein said acceleration roller is provided with radial air passage means through which the air is conducted. .Iaddend..Iadd. 10. Apparatus for spinning staple fibers as defined in claim 7, said air channel possessing a cross-section which narrows from said acceleration roller in the direction of said hollow body member. .Iaddend. .Iadd. 11. An apparatus for spinning staple fibers including a separation roller incorporating means for combing out individual fibers from a sliver, a rotatable hollow body member for receiving the separated individual fibers, a substantially V-shaped annular groove in said hollow member for collecting the individual fibers, one wall of said groove extending as a frontal wall inwardly towards the axis of rotation of the hollow body member, and means for accelerating the individual fibers by means of their surrounding air prior to the delivery to said rotatable body member, and a stationary air channel for contributing to the acceleration of the individual fibers and the surrounding air extending between the separation roller and said hollow body member and having a discharge opening arranged for discharging the fibers into the groove from a side opposite said inwardly extending frontal wall in substantially tangential direction with respect to the groove and possessing a cross section which narrows from the separation roller in the direction of said hollow body member. .Iaddend. .Iadd. 12. Apparatus for spinning staple fibers including a separation roller incorporating means for combing out individual fibers from a sliver, a rotatable hollow body member for receiving the separated individual fibers, a substantially V-shaped annular groove in said hollow member for collecting the individual fibers, one wall of said groove extending as a frontal wall inwardly towards the axis of rotation of the hollow body member, means for accelerating the individual fibers by means of their surrounding air prior to the delivery to said rotatable hollow body member, said accelerating means comprising outwardly extending air ducts communicating with the inside of the hollow body member at a location in the frontal wall radially spaced from the groove to remove the air freed of fibers, and a stationary air channel for feeding fibers to said hollow body member and for contributing to the acceleration of the individual fibers and the surrounding air extending between the separation roller and said hollow body member, said air channel having a discharge opening being arranged for discharging the fibers into the groove from a side opposite said inwardly extending frontal wall in tangential direction with respect to the groove and possessing a cross section which narrows from the separation roller in the direction of said hollow body member. .Iaddend. .Iadd. 13. Apparatus for spinning staple fibers comprising   a separation roller incorporating means for separating individual fibers from a sliver;   a rotatable hollow body member for receiving the separated individual fibers, said member having an annular groove and a frontal wall extending inwardly towards the axis of rotation of said hollow body member; and   means for accelerating the individual fibers by means of their surrounding air prior to delivery to said rotatable hollow body member, said means including a stationary air channel for contributing to the acceleration of the individual fibers and surrounding air extending between said separation roller and said hollow body member, said air channel possessing a cross section which narrows from said separation roller in the direction of said hollow body member to deliver the individual fibers and surrounding air against said frontal wall whereby the fibers move into said groove and the fiber freed air is deflected radially inwardly along said frontal wall for removal therethrough. .Iaddend..Iadd. 14. Apparatus as set forth in claim 13 wherein said hollow body member further has air ducts on a side of said frontal wall opposite said annular groove for exhausting of the fiber freed air. .Iaddend..Iadd. 15. Apparatus as set forth in claim 13 wherein said hollow body member further includes openings in said frontal wall radially inwardly of said groove and which further comprises a suction device for exhausting of the fiber freed air through said openings. .Iaddend. .Iadd. 16. Apparatus as set forth in claim 13 further comprising a housing having said separation roller and said stationary air channel mounted therein. .Iaddend..Iadd. 17. Apparatus as set forth in claim 16 wherein said means including said stationary air channel is a guide member removably mounted in said housing. .Iaddend..Iadd. 18. Apparatus as set forth in claim 16 which further comprises an acceleration roller mounted in said housing between said separation roller and said hollow body member. .Iaddend..Iadd. 19. Apparatus as set forth in claim 13 wherein said air channel is of annular construction. .Iaddend..Iadd. 20. Apparatus as set forth in claim 13 further comprising a centrally located opening in said frontal wall of said hollow body member and a hollow shaft extending through said opening for the removal of twisted fibers from said groove as a yarn. .Iaddend..Iadd. 21. Apparatus as set forth in claim 20 wherein said hollow shaft has a guide disk at one end for preventing the yarn from being sucked into said opening in said frontal wall. .Iaddend. .Iadd. 22. Apparatus for spinning staple fibers including a separation roller incorporating means for combing out individual fibers from a sliver, a rotatable hollow body member for receiving the separated individual fibers, a substantially V-shaped annular groove in said hollow member for collecting the individual fibers, one wall of said groove extending as a frontal wall inwardly towards the axis of rotation of the hollow body member, and means for accelerating the individual fibers by means of their surrounding air prior to delivery to said rotatable body member, said means for accelerating the surrounding air comprising suction creating means for subjecting the hollow body member to sub-atmospheric pressure and a stationary air channel for contributing to the acceleration of the individual fibers and the surrounding air stream extending between the separation roller and said hollow body member and having a discharge opening arranged opposite said frontal wall for discharging the fibers into the groove in substantially tangential direction with respect to the groove and possessing a cross-section which narrows from said separation roller in the direction of said hollow body member, said suction creating means being in unrestricted direct communication with the interior of the hollow body member. .Iaddend..Iadd. 23. Apparatus for spinning staple fibers including a separation roller incorporating means for combing out individual fibers from a sliver, a rotatable hollow body member for receiving the separated individual fibers, a substantially V-shaped annular groove in said hollow member for collecting the individual fibers, one wall of said groove extending as a frontal wall inwardly towards the axis of rotation of the hollow body member, and means for accelerating the individual fibers by means of their surrounding air prior to delivery to said rotatable body member, said means for accelerating the surrounding air comprising suction creating means for subjecting the interior of the hollow body member to sub-atmospheric pressure and a stationary air channel for contributing to the acceleration of the individual fibers and the surrounding air stream extending between the separation roller and said hollow body member and having a discharge opening arranged opposite said frontal wall for discharging the fibers into the groove in substantially tangential direction with respect to the groove and possessing a cross-section which narrows from said separation roller in the direction of said hollow body member, said suction creating means being in direct communication with the interior of the hollow body member. .Iaddend. .Iadd. 24. Apparatus as set forth in claim 11, said means for accelerating the fibers further comprising a suction device for exhausting air from said rotatable body member. .Iaddend.