Combined frictional false twisting device for ring spinning frame

A frictional false twisting device, comprising:

• a plurality of friction plates located between a roller nip and a yarn guide, each friction plate comprising a peripheral outer surface, wherein the roller nip is arranged to output a yarn toward the yarn guide, the yarn is arranged to spin in a spinning direction;
• and
• a movement mechanism arranged to rotate the friction plates in a rotating direction different from the spinning direction, wherein at least two of said plurality of friction plates are located adjacent to each other but on different planes and rotated about different axes such that a segment of the yarn between the roller nip and the yarn guide is arranged to rub against the peripheral outer surfaces of said at least two friction plates, wherein the plurality of friction plates are arranged to rotate about a first rotating axis, a second rotating axis and a third rotating axis, and wherein said at least two friction plates comprises a first friction plate arranged to rotate about the first rotating axis, and a second friction plate arranged to rotate about a second rotating axis, said plurality of friction plates further comprising a third friction plate arranged to rotate in the first rotating direction about the third rotating axis such that the second and third friction plates are located on a first plane and the first friction plate is located on a different second plane adjacent to the first plane.

A method of frictional false twisting for use in a ring spinning machine, the ring spinning machine comprises a roller nip for outputting a yarn toward a yarn guide, the yarn arranged to spin in a spinning direction;

• said method comprising:
• providing a plurality of friction plates between the roller nip and the yarn guide, each friction plate comprising a peripheral outer surface, wherein at least two of said plurality of friction plates are located adjacent to each other but on different planes and rotated about different axes;
• rotating the friction plates in a rotating direction different from the spinning direction;
• and
• causing the yarn to rub against the peripheral outer surfaces of at least two of said plurality of friction plates.