YARN SUCTION ARRANGEMENT FOR PIECING UNIT OF A TEXTILE MACHINE

An automatic piecing unit (1) for piecing broken yarns in a ring spinning machine is disclosed. A suction assembly for sucking a broken yarn end from a cop (4) is provided. The suction assembly comprises a suction pipe (2) having a suction mouth (3) present at an end facing the cop (4). The suction pipe (2) is positioned at a predetermined height over the cop (4), to suck the broken yarn end from the cop (4). A first venturi jet (5a) is affixed with the suction mouth (3) to receive compressed air from a pressure supply port. Movement of the compressed air through a constricted section of the first venturi jet (5a) creates vacuum in the suction mouth (3) to suck the broken yarn end from the cop (4) into the suction pipe (2).