| 摘要 |
A winding unit 2 of an automatic bobbin winder includes a suction nozzle 12 for aspirating from the surface 48 of a take-up bobbin 11 an upper yarn end portion 34 after a yarn break for subsequent placement into a splicing device 13. The suction nozzle 12 has a sensor device 35 for detecting the presence of the aspirated upper yarn and the sensor device is connected to winding unit computer 39. The suction device is connected via a cam transmission 27, 29 to a reversible drive 25 which can be driven by winding-unit computer 39 to cause the mouth 38 of the suction nozzle to execute reciprocatory pitching movements V, Z to assist the nozzle in properly aspirating the upper yarn.
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