Patent ID: 7360354

Claim:
A method for producing a composite yarn and automatically replacing spools of elastic yarn, the method comprising: providing a first spool of a first elastic yarn; feeding said first elastic yarn to an interlacing jet, said interlacing jet covering said first elastic yarn with at least one covering yarn to form a composite yarn; winding said composite yarn on a developing cop; providing a second spool of a second elastic yarn; interrupting composite yarn feeding to said developing cop and replacing the developing cop with a new tube when said first spool of elastic yarn is replaced with said second spool of elastic yarn; inserting said second elastic yarn in said interlacing jet to resume forming said composite yarn, said covering yarn moving continuously, said second elastic yarn being joined to said continuously moving covering yarn; starting winding composite yarn on said new tube, whereby said first spool of elastic yarn is automatically replaced with said second spool of elastic yarn when said first spool of elastic yarn is empty.