Abstract: This invention is concerned with a spinning apparatus with an arrangement of a spinning nozzle which generates a rotating air current positioned close to the front roller and a pair of false twist units having hollow cylindrical rollers formed from elastic material which are positioned down stream from that spinning nozzle. As contact surfaces are formed that nip the fiber bundle by contacting the hollow cylindrical rollers having elastic properties, the fiber bundle can be reliably nipped in conjunction with the elasticity and the centrifugal force of the hollow cylindrical rollers. Even when driving the false twist apparatus at high speed a sufficient false twist can be imparted, a strong delivery power and unwinding power can be applied to the fiber bundle, and not only can high speed spinning be achieved, but also a strong, uniform spun yarn with little hairiness can be manufactured.

Abstract: A fluff suppression apparatus comprising a pair of rollers disposed with axes of rotation thereof crossed with each other and in contact with each other for nipping a spun yarn thread, and at least one of the pair of rollers has, at a contacting portion thereof with the spun yarn thread, has resiliency and flexibility and has a cavity formed in the inside thereof.

Abstract: A spinning nozzle comprises first and second nozzles provided with jetting holes through which compressed air is jetted into tubular yarn passages extending along an imaginary center line of the spinning nozzle, and arranged in series coaxially with the imaginary center line, and the second nozzle is provided in its outlet end with a balloon controller having a through hole having substantially a triangular cross section. The size of the balloon is limited to that of a circle inscribed in the through hole of the balloon controller, so that twists inserted in the yarn in the second nozzle propagate stably to a portion of the yarn in the first nozzle.

Abstract: A method of untwisting sized yarn in a yarn splicing device, which comprises applying a solution to the ends of sized yarn to dissolve a size to thereby untwist the yarn at the ends thereof when they are joined together by a whirling stream of air.

Abstract: A yarn untwisting device in a pneumatic yarn splicing apparatus which includes an untwisting nozzle for guiding an end of cut yarn; a gas feed device for feeding a gas stream into the nozzle; a liquid feed device for spraying liquid to the yarn end which has been sucked into the nozzle; and a liquid recovering device connected to the nozzle.