Abstract: This present invention relates to a spun yarn having novel structure and a method of producing the same. The spun yarn of the present invention consists of a number of fibers arranged in a predetermined direction and twisted together, one end of which fibers is spirally wound around the surface of the yarn. The yarn of the present invention is spun by successively passing a sliver through a pneumatic yarn twisting device, untwisting tube, and false twisting device in turn. The twisting device, untwisting tube and false twisting device are disposed between front rollers and delivery rollers.

Abstract: This invention relates to a spun yarn spinning machine of the air injection type, which has first and second yarn twisting devices disposed between front rollers and delivery rollers. These first and second yarn twisting devices have air injection nozzles for injecting air obliquely fed toward the delivery roller side. These air injection nozzles of the first and second yarn twisting devices open into the cylindrical yarn passages of the yarn twisting devices so that the twisting directions of the yarns are in counter direction with each other tangentially of the passages at a predetermined angle with respect to the central axis of the passages of the first and second yarn twisting devices. The first yarn twisting device also has an untwisting device associated therewith for loosening the fibers before the fibers once twisted by the injected air in the first yarn twisting are fed into the second yarn twisting device.

Abstract: This present invention relates to a spun yarn having novel structure and a method of producing the same. The spun yarn of the present invention consists of a number of fibers arranged in a predetermined direction and twisted together, one end of which fibers is spirally wound around the surface of the yarn. The yarn of the present invention is spun by successively passing a sliver through a pneumatic yarn twisting device, untwisting tube, and false twisting device in turn. The twisting device, untwisting tube and false twisting device are disposed between front rollers and delivery rollers.