| 摘要 |
In the automatic servicing of an end-down condition at a delivery of a textile spinning frame or the like, wherein yarn is sucked from the bobbin and thereafter traveler-threaded and joined with yarn issuing from the frame's delivery rolls, satisfactory suction-retrieval of the bobbin yarn is facilitated by elevating and relatively slowly rotating the bobbin in an unwinding direction, by directing an air blast upwardly through the spinning ring along the surface of the bobbin yarn, and by beating such surface. Excessive twist-loss within the yarn withdrawn from the bobbin after its free end has been retrieved is minimized by rotating the bobbin relatively rapidly in an unwinding direction during such withdrawal. The bobbin is elevated and rotated without being unseated from its spindle. A beater effectively frees the end of the bobbin yarn without deteriorating the same, and, in one embodiment, frees itself of any entanglement which might inadvertently occur.
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