Patent ID: 7426820
Filing Date: 2008-09-23
Classification: B65H,D02G

Abstract:
1. A method for the production of a composite yarn and for automatic replacement of spools of elastic yarn, the method comprising the steps of: feeding covering yarn along a feed path such that said covering yarn passes through at least a first interlacing jet; delivering a first elastic yarn from a first spool such that said first elastic yarn passes through the first interlacing jet; coating the first elastic yarn with said covering yarn to form composite yarn and winding the composite yarn on a cop; arranging a second spool of a second elastic yarn in a stand-by position; withholding an initial portion of said second elastic yarn in an area of said first interlacing jet; replacing the cop of composite yarn with a new tube when delivery of said first elastic yarn is interrupted; releasing said initial portion of the second elastic yarn after delivery of said first elastic yarn is interrupted; automatically replacing said first spool of elastic yarn with said second spool of elastic yarn when delivery of said first elastic yarn is interrupted joining said covering yarn and said second elastic yarn via the first interlacing jet to resume forming said composite yarn; and winding the composite yarn on said new tube after said second elastic yarn has been covered with said covering yarn.