with the showing in the drawing five rollers 13 are provided which are so distributed over the circumference of the band wheel 3 that the belt 14 wraps around about 280 u00b0 of the circumference of the band wheel the belt 15 lies against the outside of the insertion band 4 and presses the latter against the circumference of the band wheel 3 upon the oscillating movement of the band wheel 3 and of the insertion band 4 the belt 14 is carried along by the latter and also effects an oscillating movement since in this case there is no relative movement between insertion band 4 and belt 14 there is practically no heating of the belt 14 and the belt 14 and the insertion band 4 are excellently preserved as a result of the low weight of the belt 14 and the rollers 13 no additional large moments of inertia need be overcome which is extremely favorable for the designing of the drive of the band wheel 3 the use of the belt 14 is also extremely favorable from the standpoint of noise since the rollers 13 and the belt 14 produce practically no additional noise whatsoever since on the one hand the tension of the belt 14 is of considerable importance for the proper operation of the arrangement and on the other hand certain differences in length between individual belts 14 must be expected it is advisable for at least one of the rollers 13 to be supported adjustable under spring action for this there is selected one of the two end rollers 13 around which the belt 14 is deflected preferably.