Service trolley for open-end spinning frames with a device for handling the yarn

摘要

Device for generating and controlling a yarn reserve to be installed on service trolleys with open-end spinning frames, for reattachment and start-up interventions on the spinning unit, comprising a mouthpiece (40) which sucks and generates in its interior a loop of reserve yarn, equipped, inside, with sensors (41,42) for detecting the dimension of the loop of reserve yarn and consequently piloting the reattachment procedure and reconsignment of the bobbin to its standard functioning.