substantially increased over the reciprocating blade 25 illustrated in fig2 and 3 therefore considerably increased production may be achieved with such a rotating cutting member referring now to fig4 through 5a there is illustrated another embodiment of the filament parting means 13 and false twist means 14 as there illustrated a cup shaped member 29 having an outer rim defining a yarn engaging surface is provided and is suitably driven in a manner not shown in the direction of the arrow 33 suitable thread guides 30 31 and 32 are associated with the cup shaped member 29 to guide the yarn 6 into and out of contact with the yarn engaging surface thereof the outer rim of cup shaped member 29 is defined by two friction members 34 and 35 disposed on opposite sides of another friction member 36 friction members 34 and 35 have outer yarn engaging surfaces which are relatively smooth and having only sufficient roughness to provide desired false twist effect without abrading or parting any of the filaments of the yarn brought into contact therewith therefore friction members 34 35 may be referred to as false twist imparting members and preferably have a surface roughness of less than 4 u03bcm on the other hand friction body 36 has.