DOUBLE TWIST TWISTING MACHINE

摘要

A double twist twisting machine imparts a true pretwist to one conductor of a twisted pair and backtwist modulation to another conductor of the twisted pair. The true pretwist is imparted by a uniquely threaded inside-out twister, while the backtwist modulation is imparted by modulating the position of a last pulley over which the other conductor passes before proceeding onto the formation point for the pair.