Patent ID: 8215092

Claim:
A method of making a ring-spun composite elastic yarn capable of being repeatedly cycled between tensioned and relaxed states, the method comprising: (a) forming a multi-filamentary core by joining at least one elastic performance filament and at least one inelastic control filament at respective draft ratios such that the draft ratio of the at least one elastic performance filament is at least two times the draft ratio of the at least one inelastic control filament such that the at least one inelastic control filament limits extensibility of the at least one elastic performance filament when the composite yarn is in the tensioned state thereof; and (b) directing the multi-filamentary core to a ring-spinning zone; and (c) joining a roving of staple fibers with multi-filamentary core at the ring spinning zone and ring-spinning a fibrous sheath of the staple fibers around the multi-filamentary core in the ring-spinning zone.