are placed into the apparatus in a superposed position thereafter as shown in fig6 b the roll pairs 3a 3b 2a 2b and 10a 10b are closed and thus each roll pair engages in its nip one of the slivers 4 or 5 then the rolls are rotated so that the slivers 4 and 5 slowly start their motion in the direction indicated by the arrow c the closing of the densifying trumpet 1 occurs according to fig6 c expediently only after the slivers 4 and 5 are already in motion as advanced by the three transporting roll pairs turning to fig7 the apparatus 11 according to the invention is incorporated in a first drawing frame 12 and in a second drawing frame 13 of a drawing frame and coiler can transporting system as described in more detail in german patent application 197 22 536 5 one device 11 is mounted on the in feed table 14 of the drawing frame 12 and another device 11 is mounted on the in feed table 15 of the drawing frame 13 also referring to fig8 a and 8b on the transverse carrier 16 of the in feed table 14 a plurality of driven lower feed rolls 17a 17c are provided which cooperate with rotatable respective upper rolls.