Open-end rotor spinning machine

Abstract

An open-end rotor spinning machine having a plurality of work stations, wherein each work station comprises an open-end spinning device for manufacturing a yarn, a winding device with a creel, a yarn traversing device for producing a cheese, a pivotably supported, vacuum-chargeable suction nozzle, an individual drive for pivoting the suction nozzle between a yarn take-up position in the area of the winding device and a yarn transfer position in the area of a spinning piecing member, and a device for preparing a yarn end required for restarting spinning. Each work station comprises a winding device with a drive drum driven by a reversible individual drive for driving a cheese and with a yarn traversing device driven by an individual motor for defined placement of the yarn running up onto the cheese, a yarn withdrawal device, and a work-station computer for controlling the individual drives and individual motors.

We claim:  
     
         1 . An open-end rotor spinning machine having at least two work stations, wherein each work station comprises an open-end spinning device for manufacturing a yarn, a winding device with a creel, a yarn traversing device for producing a cheese, a pivotably supported, vacuum-chargeable suction nozzle, an individual drive for pivoting the suction nozzle between a yarn take-up position in the area of the winding device and a yarn transfer position in the area of a spinning piecing member, and a device for preparing a yarn end required for restarting spinning, wherein each work station of the open-end rotor spinning machine comprises: 
 a winding device with a drive drum driven by a reversible individual drive for driving a cheese and with a yarn traversing device driven by an individual motor for defined placement of the yarn running up onto the cheese, a yarn withdrawal device driven by another individual motor, and a work-station computer for controlling the individual drives and individual motors in a defined manner.    
     
     
         2 . The open-end rotor spinning machine according to  claim 1 , wherein the individual drive for the suction nozzle is a stepping motor connected via a control lead to the work-station computer.  
     
     
         3 . The open-end rotor spinning machine according to  claim 1 , wherein a pivotably supported centering sheet driven by a stepping motor or a pneumatic cylinder is arranged in an area of the winding device.  
     
     
         4 . The open-end rotor spinning machine according to  claim 1 , wherein each work station comprises a mechanical yarn storage device driven by an individual motor and a pneumatically operated yarn storage nozzle.  
     
     
         5 . The open-end rotor spinning machine according to  claim 1 , wherein the yarn withdrawal device comprises a withdrawal cylinder loaded by a reversible individual drive and a clamping roller without a drive resting on the take-off cylinder.  
     
     
         6 . The open-end rotor spinning machine according to  claim 5 , wherein the reversible individual drive is a synchronous motor.