Method and device for drafting at least one sliver

Abstract

Disclosed is a method for drafting at least one sliver (FB) by means of a regulated spinning machine, particularly a carding machine or drawing frame, comprising pairs of rollers ( 2 a, 2 b, 3 a, 3 b, 4 a, 4 b ) which are disposed one behind another and upstream of which the cross section of the at least one sliver is measured. The inventive method is characterized by the fact that at least one roller ( 2 a, 3 a ) of a first pair of rollers ( 2 a, 2 b, 3 a, 3 b ) is triggered via a first regulating circuit while at least one roller ( 4 a ) of a second pair of rollers ( 4 a, 4 b ) is triggered via a second regulating circuit based on the measuring signals. Also disclosed is a device for carrying out the inventive method.

1 . Method for the drafting of at least one fiber sliver (FB) by means of a regulated spinning machine, particularly a carding machine or draw frame comprising pairs of rollers ( 2   a,    2   b,    3   a,    3   b,    4   a,    4   b ) which are disposed one behind another, whereby the mass cross-section of the (at least one) fiber sliver is measured upstream of the pairs of rollers ( 2   a,    2   b,    3   a,    3   b,    4   a,    4   b ), characterized in that based on the measuring signals, at least one roller ( 2   a,    3   a ) of a first pair of rollers ( 2   a,    2   b,    3   a,    3   b ) is actuated through a first auto-leveling circuit and at least one roller ( 4   a ) of a second pair of rollers ( 4   a,    4   b ) is actuated through a second auto-leveling circuit.  
   
   
       2 - 29 . (canceled)