Method of making cord

Claim 1

THE METHOD OF PRODUCING A SUBSTANTIALLY BALANCED CORD FROM TWISTED SYNTHETIC FILAMENTARY MATERIAL THAT EXHIBITS THE PROPERTY OF APPRECIABLE CONTRACTION WHEN HEATED WHICH COMPRISES, TWISTING A CORD FROM FILAMENTS OF SAID MATERIALS WHILE THE FILAMENTS ARE MOIST, WINDING THE TWISTED CORD WHILE STILL MOIST INTO A PACKAGE SUITABLE FOR USE IN A CREEL, AND SUBJECTING THE PACKAGE OF WOUND CORD WHILE STILL CONTAINING 4% TO 10% MOISTURE TO A HIGH FREQUENCY ALTERNATING ELECTRICAL FIELD OF A MAGNITUDE AND FOR A TIME INTERVAL SUCH THAT THE TEMPERATURE OF THE CORD DOES NOT EXCEED 140*F. AND THE TWIST UNBALANCE OF THE TREATED CORD DOES NOT EXCEED 6 TWIST PER YARD.

Claim 2

THE METHOD OF PRODUCING A SUBSTANTIALLY BALANCED CORD FROM TWISTED SYNTHETIC FILAMENTARY MATERIAL THAT EXHIBITS THE PROPERTY OF APPRECIABLE CONTRACTION WHEN HEATED WHICH COMPRISES, TWISTING A CORD FROM FILAMENTS OF SAID MATERIALS WHILE THE FILAMENTS ARE MOIST, WINDING THE TWISTED CORD WHILE STILL MOIST INTO A PACKAGE SUITABLE FOR USE IN A CREEL, AND SUBJECTING THE PACKAGE OF WOUND CORD WHILE STILL CONTAINING 4% TO 10% MOISTURE TO A HIGH FREQUENCY ALTERNATING ELECTRICAL FIELD OF A MAGNITUDE AND FOR A TIME INTERVAL SUCH THAT THE TEMPERATURE OF THE CORD DOES NOT EXCEED 140*F. AND THE TWIST UNBALANCE OF THE TREATED CORD DOES NOT EXCEED 6 TWIST PER YARD.

Claim 3

THE METHOD OF PRODUCING A PACKAGE OF TWISTED POLYAMIDE CORD HAVING IMPROVED RESISTANCE HEAT DEGRADATION AND A TWIST BALANCE SATISFACTORY FOR USE IN A CREEL WHICH COMPRISES, PROVIDING A PLURALITY OF TWISTED YARNS OF LINEAR POLYAMIDE FIBERS CONTAINING FROM 4% TO 10% MOISTURE IN THE FORM OF WATER, THE SAID MOISTURE HAVING A SUBSTANCE THEREIN WHICH RETARDS HEAT DEGRADATION OF THE FIBERS WITH THE AMOUNT OF SAID SUBSTANCE BEING SUFFICIENT TO PROVIDE A DEPOSIT ON THE SAID YARNS IN ORDER OF .1 TO 10.0% OF THE WEIGHT OF THE YARNS, FORMING A NORMALLY UNBALANCED CORD FROM SAID YARNS BY TWISTING THEM TOGETHER WHILE MOIST UNTIL THE NUMBER OF TURNS PER INCH OF THE CORD APPORXIMATES BUT IS LESS THAN THE NUMBER OF TURNS PER INCH OF THE YARN, WINDING THE TWISTED CORD WHILE MOIST INTO A PACKAGE SUITABLE FOR USE IN A CREEL, AND DIELECTRICALLY HEATING THE PACKAGE OF WOUND CORD FOR A PERIOD OF TIME AND TO A TEMPERATURE SUCH THAT THE PACKAGE IS NOT SUBSTANTIALLY DISTORTED BY HEAT SHRINKAGE OF THE CORD AND THE TWIST UNBALANCE IS REDUCED TO AN AMOUNT NOT IN EXCESS OF 6 TWISTS PER YARD OF CORD.

Claim 4

THE METHOD OF PRODUCING A PACKAGE OF TWISTED POLYAMIDE CORD HAVING IMPROVED RESISTANCE HEAT DEGRADATION AND A TWIST BALANCE SATISFACTORY FOR USE IN A CREEL WHICH COMPRISES, PROVIDING A PLURALITY OF TWISTED YARNS OF LINEAR POLYAMIDE FIBERS CONTAINING FROM 4% TO 10% MOISTURE IN THE FORM OF WATER, THE SAID MOISTURE HAVING A SUBSTANCE THEREIN WHICH RETARDS HEAT DEGRADATION OF THE FIBERS WITH THE AMOUNT OF SAID SUBSTANCE BEING SUFFICIENT TO PROVIDE A DEPOSIT ON THE SAID YARNS IN ORDER OF .1 TO 10.0% OF THE WEIGHT OF THE YARNS, FORMING A NORMALLY UNBALANCED CORD FROM SAID YARNS BY TWISTING THEM TOGETHER WHILE MOIST UNTIL THE NUMBER OF TURNS PER INCH OF THE CORD APPORXIMATES BUT IS LESS THAN THE NUMBER OF TURNS PER INCH OF THE YARN, WINDING THE TWISTED CORD WHILE MOIST INTO A PACKAGE SUITABLE FOR USE IN A CREEL, AND DIELECTRICALLY HEATING THE PACKAGE OF WOUND CORD FOR A PERIOD OF TIME AND TO A TEMPERATURE SUCH THAT THE PACKAGE IS NOT SUBSTANTIALLY DISTORTED BY HEAT SHRINKAGE OF THE CORD AND THE TWIST UNBALANCE IS REDUCED TO AN AMOUNT NOT IN EXCESS OF 6 TWISTS PER YARD OF CORD.