Abstract: An improved false twist machine employing a friction disc arrangement which provides high twist in the multi-filament yarn on the entering side and increased yarn feeding rate on the outlet side to reduce the tension of the exiting yarn to lessen the number of filament breaks. The friction disc arrangement has discs of increased thickness to diameter ratio on the entering side when compared to the exit side, to provide increased yarn angle to accomplish the desired high twist. The reduced thickness to diameter ratio on the exit side increases yarn forwarding action, thus reducing the outlet tension.

Abstract: Apparatus for friction texturing textile yarns includes a cylinder (1) rotatable about its longitudinal axis on a base plate (2). The outer surface of the cylinder has regularly spaced friction surfaces (3) with grooves therebetween, and a spirally shaped outer cover (6) containing pegs (5) which project radially into the cylinder and engage grooves (4). The cover (6) has a cylindrical collar (10) having a yarn guide (9), the collar being movable along the axis of the cylinder and held in a desired position with a set screw (11). The top of the cylinder (1) is covered with a disc (13) having a projecting annular flange.Yarn is guided round the cylinder (1) by the pegs (5) and false twist by friction is imparted to the yarn.

Abstract: A method and apparatus is provided for treating pieced places in yarn produced on open end spinning machines. The pieced places are treated by mechanically compacting the same during drawing off of the yarn from a spinning machine after a piecing operation. Various embodiments are disclosed for carrying out this mechanical compacting, including retractable fingers, rollers, and belts, which operate together to press the piece places and compact the same during drawing off of the yarn from the spinning assembly. In preferred embodiments, the apparatus for compacting the pieced places is carried on a mobile servicing device.