Production of artificial yarns

Claim 1

IN A PROCESS FOR PRODUCING A YARN WHICH IS ONLY CONTRACTILE TO THE EXTENT OF SUBSTANTIALLY LESS THAN 50% AND WHICH IS ALMOST AS HIGHLY BULKED AS FULLY TWIST CRIMPED YARN, THE STEPS OF FALSE TWISTING A THERMOPLASTIC YARN WHILE ONLY PARTIALLY SETTING THE YARN BY MAINTAINING DURING SAID FALSE TWISTING A RELATIVELY LOW TEMPERATURE BELOW THE MELTING POINT OF SAID THERMOPLASTIC YARN SO AS TO OBTAIN A PARTIALLY SET FALSE TWIST CRIMPED YARN WHICH HAS A HIGH CONTRACTABILITY EXCEEDING 50%; DELIVERING SAID PARTIALLY SET FALSE TWISTED YARN HAVING HIGH CONTRACTABILITY AFTER SAID FALSE TWIST CRIMPING AT A PREDETERMINED SPEED; COLLECTING SAID PARTIALLY SET FALSE TWIST CRIMPED YARN HAVING HIGH CONTRACTABILITY DELIVERED AT SAID PREDETERMINED SPEED ON A TAKE-UP PACKAGE AT A SPEED WHICH IS LESS THAN SAID DELIVERY SPEED SO THAT THE TENSION OF SAID PARTIALLY SET TWIST CRIMPED YARN HAVING HIGH CONTRACTABILITY IS REDUCED, BUT WHICH SPEED IS STILL GREAT ENOUGH TO RETAIN SUBSTANIAL TENSION IN SAID THUS ONLY PARTIALLY TENSIONED PARTIALLY SET FALSE TWIST CRIMPED YARN HAVING HIGH CONTRACTABILITY WHEN THE SAME REACHES SAID TAKE-UP PACKAGE, SO THAT SAID PARTIALLY TENSIONED PARTIALLY SET FALSE TWIST CRIMPED YARN OF HIGH CONTRACTABILITY IS WOUND UP ON SAID TAKE-UP PACKAGE STILL UNDER SUBSTANTIAL TENSION; AND FINALLY SUBJECTING SAID PARTIALLY TENSIONED PARTIALLY SET FALSE TWIST CRIMPED YARN HAVING HIGH CONTRACTABILITY WHILE IT IS WOUND UP UNDER SAID SUBSTANTIAL TENSION ON SAID TAKEIS WOUND UP UNDER GIVEN PERIOD OF TIME TO A SETTING FLUID WHICH COMPLETES THE SETTING OF SAID PARTIALLY TENSIONED PARTIALLY SET FALSE TWIST CRIMPED YARN, THUS OBTAINING A RELAXED FALSE TWIST CRIMPED YARN WHICH HAS ONLY A LOW CONTRACTABILITY OF SUBSTANTIALLY LESS THAN 50%, HAS SUBSTANTIAL DEMENSIONAL STABILITY AND IS SUBSTANTIALLY OF THE NON-TORQUE TYPE WHILE BEING ALMOST AS HIGHLY BULKED AS FULLY TWIST CRIMPED YARN.