Stretch yarn and process for preparing the same

Claim 1

THE PROCESS FOR PREPARING A STRETCH YARN WHICH COMPRISES MECHANICALLY FALSE TWISTNG WITH ROTATING MECHANICAL PARTS AT LEAST ONE END OF STAPLE SPUN YARN SELECTED FROM THE GROUP CONSISTING OF: (A) STAPLE SPUN YARNS MADE UP ENTIRELY OF WOOL FIBERS; AND (B) STAPLE SPUN YARNS MADE UP OF THERMOPLASTIC AND NON-THERMOPLASTIC STAPLE FIBERS, AND SUBJECTING SAID END OF STAPLE SPUN YARN TO DRY HEAT WHILE IN THE FALSE TWISTED CONDITION, THE WOOL AND NONTHERMOPLASTIC STAPLE FIBER IN SAID STAPLE SPUN YARNS RETAINING THEIR NON-THERMOPLASTIC CHARACTERISTICS DURING SAID MECHANICAL FALSE TWISTING AND HEAT TREATMENT AND BEING FREE FROM ANY WETTING AND CHEMICAL TREATMENT PRIOR TO AND DURING SAID MECHANICAL FALSE TWISTING AND HEAT TREATMENT WHICH WOULD RENDER THE SAME FUNCTIONALLY THERMOPLASTIC.