in the channel 26 the fibres are acquired by the air flow 25 the release referred to takes place for example because the suction effect on the suction roller 62 is no longer present after the clamping point k for example because the cover connecting the points a and b shown in fig9 is no longer provided after the clamping point k the release can however be enhanced by means of an air blast b 2 which blows through the holes 63 by means of the channel b 2 this air blast b 2 can however be dispensed with the channel b 2 is supplied with compressed air via the channel b 1 the fibres leave the suction roller 62 in a plane which contains the clamping line k this plane can be offset in relation to the fibre guidance surface 28 in such a way that the fibre sliver is deflected at the fibre take up edge 31 see fig2 and 2 a respectively as far as the drafting device from fig8 is concerned this is a generally known drafting device system and it is accordingly not considered in any further detail from fig8 and 9 it can be seen that the fibre conveying channel 26 is provided with a fibre guidance surface 28 which is designed without a twist or without a helix see fig1 a and 1 c respectively the fibre guidance.