A method for feeding of the free end of an auxiliary yarn of an auxiliary yarn coil, to form a wind-on reel - spinning and twisting machines and the yarn out of the method according to the attachment device for

摘要

Textile yarn piecing apparatus having a servicing assembly positionable in a first location for supplying a free end of auxiliary yarn from an auxiliary yarn bobbin to a revolving spindle having a bobbin onto which said free end is to be wrapped and with a surrounding ring having a traveller which is to be threaded onto said auxiliary yarn and positionable in a second location for piecing an intermediate portion of said auxiliary yarn to roving issuing from roving delivery rolls and cutting the auxiliary yarn to again provide a cut free end thereof. The servicing assembly has a yarn feeding tube for conveying of yarn from the auxiliary yarn bobbin and an air suction yarn storage tube for storing a substantial length of the free end of the auxiliary yarn. The mouth openings of the yarn feeding and storage tubes are spaced from one another to provide a free yarn zone therebetween. There is also provided a yarn release air jet adjacent the free yarn zone, in the first location providing a release jet of air for removing the free end of yarn from the storage tube and propelling it toward the bobbin for wrapping therearound, the air suction yarn storage tube in the second location providing air suction for retrieving the cut free end of auxiliary yarn and storing it in the storage tube.