Friction spinning frame

Abstract

A friction spinning frame including a pair of twisting rollers disposed substantially in parallel and driven in the same direction to each other at a small gap therebetween to form a yarn forming zone of a valley shaped profile on upper surfaces of the twisting rollers along the gap. At least one of the twisting rollers is a perforated hollow roller including an outer shell having a plurality of perforations on the entire outer surface thereof and a suction device for providing a suction force through the perforations, whereby staple fibers are twisted to form a yarn while being sucked and held on the yarn forming zone. A supporting system of the perforated twisting roller is such that a suction pipe, a part of which is accommodated in the outer shell and has a suction mouth extending close to an inside wall of the outer shell in the axial direction of the perforated roller, is fixedly secured to a machine frame; a beariung is fixedly accommodated in the suction pipe; and a shaft is rotatably supported by the bearing at one end portion thereof and is fixedly secured to the oute shell at the other end portion thereof.

Dependencies are inferred from the claim text.