Method and device for the production of a covered elastic yarn and for automatic replacement of feeds spools

摘要

The device comprises in combination: a first interlacing jet ( 19 ); a feed path of the covering yarn (FT) and a feed path of the elastic: yarn (F 1 ; F 2 ) towards the first interlacing jet; supporting means ( 37 A, 37 B) for spools of elastic yarn (R 1 , R 2 ); winding members ( 54 ) to wind the composite yarn (FC) on the cop being formed (BC); an interruption device to interrupt feed of composite yarn to said cop being formed and start winding the composite yarn on a new winding tube. The supporting means for the spools of elastic yarn are suitable to support at least a first spool of elastic yarn and at least a second spool of elastic yarn; associated with said first interlacing jet are a retaining member ( 20 ) to withhold an initial free end of the elastic yarn of said second spool and a deflecting element to withhold an initial portion of the second elastic yarn during delivery of the first elastic yarn to the interlacing jet; a sensor to detect interruption of feed of said first elastic yarn to said first interlacing jet; a control to control release of the initial portion after interruption of feed of the first elastic yarn has been detected.