co-operating with suction means (D01H4/08, D01H4/16 take precedence)

Full Title

Open-end spinning machines or arrangements for imparting twist to independently moving fibres separated from slivers; Piecing arrangements therefor; Covering endless core threads with fibres by open-end spinning techniques > imparting twist by contact of fibres with a running surface > co-operating with suction means (D01H4/08, D01H4/16 take precedence)