Yarn treating method

Claim 1

THE METHOD OF TREATING STRANDS OF YARN IN TWISTED CONDITION TO INCREASE THE TENSILE STRENGTH AND DECREASE THE STRETCH THEREOF COMPRISING ADVANCING THE YARN IN A LENGTHWISE AXIAL DIRECTION THROUGH A BATH OF LIQUID IMPREGNANT CONTAINING A BONDING AGENT, ENGAGING THE ADVANCING YARN AT A PAIR OF SPACED APART POINTS AND PERIODICALLY PINCHING THE YARN AT THE POINTS OF ENGAGEMENT, ROLLING THE SECTION OF THE YARN HELD BETWEEN PINCHED POINTS BACK AND FORTH TRANSVERSELY TO THE AXIS OF MOVEMENT THEREOF TO ALTERNATELY UNTWIST AND RETWIST THE YARN TO PROMOTE PENETRATION OF THE IMPREGNANT INTO THE YARN, SUPPLYING A SURPLUS OF IMPREGNANT BETWEEN THE POINTS OF ENGAGEMENT, STRETCHING THE IMPREGNATED YARN TO ELONGATE THE SAME, AND DRYING THE YARN WHILE STRETCHED TO ALLOW THE BONDING AGENT TO HARDEN AND PERMANENTLY SET THE FIBERS OF THE YARN.