Air Jet Spinning Arrangement

Abstract

An air jet spinning arrangement includes an essentially hollow cylindrical vortex chamber, whose peripheral wall forms a supporting surface for a peripheral surface of a rotationally symmetrical insert in the running-in area of the staple fiber strand. A number of air jet slits are worked into the peripheral surface of the insert, which air jet slits are completed to form closed compressed air channels by way of the supporting surface. The nozzle-like mouths of the compressed air channels are arranged on the front side of the insert facing the vortex chamber. The design of the air jet slits resemble a multiple-start thread.

1 - 3 . (canceled) 
   
   
       4 . Air jet spinning arrangement for producing a spun thread from a staple fiber strand, comprising:
 an essentially hollow cylindrical vortex chamber, whose peripheral wall provides a supporting surface for a peripheral surface of a rotationally symmetrical insert in the running-in area of the staple fiber strand;   wherein a number of air jet slits are worked into the peripheral surface, which air jet slits are completed to form closed compressed air channels by way of the supporting surface, the nozzle-like mouths of the compressed air channels being arranged on the front side of the insert facing the vortex chamber; and   further wherein the air jet slits are designed in the form of a multiple-start thread.   
   
   
       5 . Air jet spinning arrangement according to  claim 4 , wherein the multiple-start thread is worked into a peripheral surface, which is in the form of a cylinder. 
   
   
       6 . Air jet spinning arrangement according to  claim 4 , wherein the depth of the multiple-start thread varies along the length of the air jet slits. 
   
   
       7 . Air jet spinning arrangement according to  claim 5 , wherein the depth of the multiple-start thread varies along the length of the air jet slits. 
   
   
       8 . An air jet spinning arrangement for producing a spun thread from a staple fiber strand, comprising:
 a substantially hollow cylindrical vortex chamber having a peripheral wall providing a supporting surface;   a rotationally symmetrically insert having a peripheral surface supported by the supporting surface in a running-in area of the staple fiber strand;   wherein a plurality of air jet slits extend along the peripheral surface, the air jet slits forming closed compressed air channels when the peripheral surface is supported by the supporting surface; and   further wherein the compressed air channels have nozzle-like mouths arranged on a front side of the insert facing the vortex chamber, the air jet slits being designed in the form of a multiple-start thread.   
   
   
       9 . Air jet spinning arrangement according to  claim 8 , wherein the multiple-start thread is worked into a peripheral surface, which is in the form of a cylinder. 
   
   
       10 . Air jet spinning arrangement according to  claim 8 , wherein the depth of the multiple-start thread varies along the length of the air jet slits.