Transfer tail traction mechanism

Claim 1

Apparatus for the automatic fOrmation during continuous yarn delivery of a transfer tail in a transfer tail zone adjacent a winding zone on a bobbin, said apparatus having a frame-like bobbin support which is rotatable to bring bobbins mounted thereon successively into and out of engagement with a bobbin driving element, a switching hub in rotatable driving engagement with said bobbin support for rotating same to shift said bobbins relatively to said driving element, characterized by a traverse device having guide means extending across the whole of the transfer tail zone as well as the winding zone of a bobbin, a carrier mounted on and slidable relative to said guide means, cord drive means connected between said switching hub and said carrier for producing carrier movement when the switching hub is rotated, a yarn guide moveable with said carrier for receiving a yarn during bobbin changing and shifting the yarn from the winding zone into the transfer tail zone situated selectively in one of the two peripheral end zones of the empty bobbin, said cord drive means comprising a cord and a pretension spring interconnected serially between said carrier and said switching hub whereby a delayed actuation of said carrier is produced by switching rotation of said switching hub.