path l 1 which usually move back and forth between certain end positions and thus also contains the axis of the spindle 4 at the underside 46 the suction opening 50 extends up to the direct neighborhood of the upper feed roller 8 whereas its end located at the end wall 48 terminates in a substantially circular shaped widened or enlarged portion 52 which is intersected by the lengthwise axis of the suction tube 36 operatively associated with the strippers 20 are the suction openings or holes 60 at the side of the suction tube 36 confronting such strippers 20 as best seen by referring to fig1 and 3 in order to continuously remove fiber and dust which collects at the strippers 20 during operation of the machine on the other hand the airflow which prevails at the suction holes 60 and especially the suction opening 50 is chosen such that the slubbing l is not damaged in this regard the arrangement of the suction head 40 above the slubbing travel path is advantageous in contrast to an arrangement below the same since the slubbing l frequently hangs down during the standstill times of the machine there is not any danger upon start up of the machine of damaging the slubbing due to the more rapidly effective suction airflow when there occurs rupture of the slugginb l within the spinning triangle 100 then the free end of the slubbing which is further delivered by the drafting gear.