Spinning arrangement

Abstract

A spinning device is provided in which at least one sliver is opened to single fiber and the single fiber are deposited on a moveable collecting surface in the form of an air-permeable sieve belt. During transport on the collecting surface, the fiber veil is condensed transversely to its direction of movement to a fiber strand. The now roving-like fiber strand is transported through a nipping line and twisted to a thread by a twisting nozzle.

What is claimed is:  
     
         1 . A spinning arrangement comprising: 
 an opening roller for opening at least one sliver to single fibers;    a driven, air-permeable collecting surface arranged directly adjacent to the opening roller and in a direction of motion of the single fibers for taking over the single fibers in the form of a wide fiber veil;    a suction opening for condensing the fiber veil to a narrow fiber strand, said suction opening being covered by the collecting surface and tapering by two side edges in a direction of motion of the collecting surface from a starting width corresponding to a width of the fiber veil to a narrow suction slit;    a nipping line provided at an end area of the suction opening for nipping the condensed fiber strand; and    a twisting nozzle directly downstream of the nipping line for twisting the fiber strand to a thread,    wherein the collecting surface is formed by an outer side of a circulating sieve belt.    
     
     
         2 . A spinning arrangement according to  claim 1 , wherein the collecting surface is formed by an essentially plane section of the sieve belt.  
     
     
         3 . A spinning arrangement according to  claim 2 , wherein a suction housing comprising the suction opening is arranged at the collecting surface, the outer contour of the suction housing being adapted in the area of the collecting surface to the course of the sieve belt.  
     
     
         4 . A spinning arrangement according to  claim 3 , wherein the sieve belt is glidingly guided on the suction housing in the area of the collecting surface.  
     
     
         5 . A spinning arrangement according to  claim 2 , wherein the sieve belt is driven on its outer side by friction by a nipping roller.  
     
     
         6 . A spinning arrangement according to  claim 1 , wherein the sieve belt loops around a driving roller which is arranged in an area of the nipping line.  
     
     
         7 . A spinning arrangement according to  claim 2 , wherein the sieve belt loops around a driving roller which is arranged in an area of the nipping line.  
     
     
         8 . A spinning arrangement according to  claim 1 , wherein the sieve belt loops around a driving roller which is arranged in an area of the opening roller.  
     
     
         9 . A spinning arrangement according to  claim 2 , wherein the sieve belt loops around a driving roller which is arranged in an area of the opening roller.  
     
     
         10 . A spinning arrangement according to  claim 6 , wherein an idle roller is arranged for the sieve belt in an area of the opening roller.  
     
     
         11 . A spinning arrangement according to  claim 7 , wherein an idle roller is arranged for the sieve belt in an area of the opening roller.  
     
     
         12 . A spinning arrangement according to  claim 1 , wherein there is a spacing between the suction housing and a belt section travel path of the sieve belt which faces away from the suction opening.  
     
     
         13 . A spinning arrangement according to  claim 2 , wherein there is a spacing between the suction housing and a belt section travel path of the sieve belt which faces away from the suction opening.  
     
     
         14 . A spinning arrangement according to  claim 3 , wherein there is a spacing between the suction housing and a belt section travel path of the sieve belt which faces away from the suction opening.  
     
     
         15 . A spinning arrangement according to  claim 5 , wherein there is a spacing between the suction housing and a belt section travel path of the sieve belt which faces away from the suction opening.  
     
     
         16 . A spinning arrangement according to  claim 6 , wherein there is a spacing between the suction housing and a belt section travel path of the sieve belt which faces away from the suction opening.  
     
     
         17 . A spinning arrangement according to  claim 12 , wherein, in the area of the spacing, a cleaning device for the sieve belt is provided.  
     
     
         18 . A spinning arrangement according to  claim 13 , wherein, in the area of the spacing, a cleaning device for the sieve belt is provided.  
     
     
         19 . A spinning arrangement according to  claim 14 , wherein, in the area of the spacing, a cleaning device for the sieve belt is provided.  
     
     
         20 . A spinning arrangement according to  claim 15 , wherein, in the area of the spacing, a cleaning device for the sieve belt is provided.  
     
     
         21 . A spinning arrangement according to  claim 1 , wherein the nipping line is formed by a nipping roller which presses the fiber strand against the suction housing.  
     
     
         22 . A spinning arrangement according to  claim 2 , wherein the nipping line is formed by a nipping roller which presses the fiber strand against the suction housing.  
     
     
         23 . A spinning arrangement according to  claim 6 , wherein the nipping line is formed by a nipping roller which presses the fiber strand against the suction housing.  
     
     
         24 . A spinning arrangement according to  claim 21 , wherein the suction opening extends to the area of the nipping line.  
     
     
         25 . A spinning arrangement according to  claim 23 , wherein the suction opening extends to the area of the nipping line.  
     
     
         26 . A spinning arrangement according to  claim 23 , wherein the nipping roller is also disposed on the driving roller.  
     
     
         27 . A spinning arrangement according to  claim 25 , wherein the nipping roller is also disposed on the driving roller.  
     
     
         28 . A spinning arrangement according to  claim 1 , wherein one side edge of the suction opening extends parallel to the direction of motion of the sieve belt.  
     
     
         29 . A spinning arrangement according to  claim 2 , wherein one side edge of the suction opening extends parallel to the direction of motion of the sieve belt.  
     
     
         30 . A spinning arrangement according to  claim 28 , wherein the side edge is disposed continuously on the sieve belt.  
     
     
         31 . A spinning arrangement according to  claim 3 , wherein, along the collecting surface, the suction housing comprises a plurality of chambers with differing levels of pressure.  
     
     
         32 . A spinning arrangement according to  claim 4 , wherein, along the collecting surface, the suction housing comprises a plurality of chambers with differing levels of pressure.  
     
     
         33 . A spinning arrangement according to  claim 5 , wherein, along the collecting surface, the suction housing comprises a plurality of chambers with differing levels of pressure.  
     
     
         34 . A spinning arrangement according to  claim 6 , wherein, along the collecting surface, the suction housing comprises a plurality of chambers with differing levels of pressure.  
     
     
         35 . A spinning arrangement according to  claim 8 , wherein, along the collecting surface, the suction housing comprises a plurality of chambers with differing levels of pressure.