the air carrying the yarn into expanded section 88 of the separator 86 still occurs with consequent reverse circulation of the carrier air into the corners of the midsection 88 and consequent mixing and separation of the balls from the yarn however since the collection section rearwardly or upstream of the end of entry tube 90 is eliminated the pressure and velocity of the air carrying the yarn is not reduced to as great an extent and thus the overall pressure of the air necessary to carry the yarn through the separator 86 will be reduced and or the dimensions of the separator 86 may be changed while maintaining the carrier air pressure the same the utilization of separator 86 in a horizontal position also aids in the separation of the balls from the moving yarn to the extent that the forces of gravity are acting all the way along the length of the yarn as it is passing through the central chamber 88 the bottom of separator 86 may take a number of different configurations the only requirement being that it slope to a single point or area for collection and removal of the separated balls for ease of manufacture the embodiment of fig4 and 5 show a slot cut in the bottom of section 88 of.