Abstract: A fiber control apparatus in an open-end spinning frame is disclosed. According to the invention, in an open-end spinning unit having a fiber passage through which fibers opened by the combing roller are carried into the spinning chamber of the rotor, one or more nozzles are provided in the unit, each nozzle having an outlet opening located adjacent to the fiber outlet opening of the fiber passage so that one or more streams of jet air, emitted from the nozzle or nozzles, direct and guide the fibers introduced into the chamber toward the interior peripheral surface of the spinning chamber of the rotor, thus causing the fibers to reach said surface immediately without being slowed or bent by ambient air streams within the chamber. Consequently, formation of yarn having bent or randomly attached fibers is substantially prevented, whereby the strength and quality of the spun yarn is greatly improved.

Abstract: An open-end spinning unit is provided which has a spinning rotor open on one side and a bottom wall and an inner wall. A closing element covers the open side of the rotor and includes a fiber supply duct. To enhance the air conveyance of fibers to the inner wall, at least one suction opening is provided downstream of an outlet opening of the fiber supply duct in the closing element so that an airstream directed from the outlet opening toward the suction opening is generated in the same direction as the direction of rotation of the rotor. This invention is applicable not only to a forced-exhaustion type of unit but also to a self-exhaustion type of unit.

Abstract: An improved spinning rotor for an open-end spinning frame is disclosed herein, according to which the rotor is made of steel, and selected portions of its interior peripheral surfaces, including the fiber-collecting groove thereof, which is formed along the maximum-diameter region within the spinning chamber, are heat-treated by a focused laser beam or focused electron beam to harden the same. Due to the nature of laser beams, only those areas which require surface hardening are heat-treated without heating the entire rotor body, so that no strain or distortion is developed in the rotor during the heat treatment process. As a result, the rotor is heat-treated to provide excellent wear-resisting properties and exceptional stability in operation at an extremely high speed for an extended period of service.

Abstract: A spinning unit for an open end spinning machine is disclosed. The unit includes a rotor having a short cylindrical portion defining a central aperture, a frustoconical portion connected at one end to and converging toward the cylindrical portion, and a portion connected to the other end of the frustoconical portion with air discharge openings. The unit further includes a casing having a first portion, and a second portion connected to the first portion of the casing and surrounding the portion of the rotor connected to the other end of the frustoconical portion to define an annular chamber into which air is discharged through the air discharge openings during rotation of the rotor.

Abstract: In an improved combing roller provided with a metallic wire mounted on a body thereof comprising a main cylindrical body and a pair of flanges coaxially formed at both ends of the main cylindrical body, a base portion of the metallic wire rigidly pressed into a right hand or a left hand helical groove formed in the main body and the working direction of the metallic wire coincide with the rotational direction of the combing roller, at a terminal portion of the metallic wire facing one of the flanges on a side of the combing roller corresponding to the direction of progress of an imaginary right hand screw imaginarily engaged with the above-mentioned right hand helical groove or an imaginary left hand screw imaginary engaged with the above-mentioned left hand helical groove when the imaginary screws are turned in the direction corresponding to the rotational direction of the combing roller, at least one tooth is inclined toward the above-mentioned flange.

Abstract: Disclosed herein is a fiber feeding roller for an open-end spinning apparatus, wherein a plurality of projections with flat surface are formed in rows extending in axial direction of the body of said fiber feeding roller on the outer circumferential surface thereof and, simultaneously, a plurality of projections with knurled surface are arranged between the aforesaid projections with flat surface, whereby preventing harmful sliver slippage on said feeding roller and also providing a uniform nip for the sliver irrespective of the size thereof so that said fiber feeding roller may be applicable to a wider range of count numbers of spinning yarns and the quality of such spinned yarns may be improved as well.

Abstract: An open end spinning machine includes a plurality of spinning units, in each of which a sliver is opened by a carding roller and transported, in the form of individually opened fibers, into a spinning rotor through a fiber supply channel provided in a housing for the carding roller. The supply channel has a mouth opening towards the carding roller with a fiber separating edge, which is greatly subject to wear during operation of the spinning unit. A portion of the carding roller housing, which defines at least the fiber separating edge, is detachable from another portion of the housing and is urged in a predetermined direction by a biassing spring so that any undesirable clearance, which would be produced between the portions of the housing by structurally separating them from each other, can substantially removed.

Abstract: This invention provides a rotor sealing device used on an open-end spinning apparatus having a spinning rotor which forms therein air-discharge apertures, the opening in said spinning rotor being openably closed by a body member which has a fibers delivery aperture formed therein; said rotor sealing device being characterized in that a sealing member is inserted into the space located between said rotor opening and said body member positioned in opposite relation thereto. This device, though being of such a simple construction, is capable of improving the effect of rotor inside sealing over devices heretofore.

Abstract: A device for preventing a spindle of an open-end spinning frame, which device comprises a rotatable spindle having a rotor attached at one end thereof and a shaft, formed at the other end thereof, to be pressed by a running belt, a bearing casing for rotatably supporting the spindle, a holder for holding the bearing casing via a pair of resiliently yieldable members. At least one of the resiliently yieldable members are detachably mounted on a sleeve detachably secured to the bearing casing. A labyrinth seal is formed between the rotor and the sleeve.

Abstract: An open-end spinning frame comprises a fiber feeding mechanism, constructed with a feed foller and a presser urged towards the feed roller, a combing roller having a metallic wire wound therearound, a rotor for spinning the fibers delivered from the combing roller, and a pair of flat side plates. The feeding mechanism is provided with a passage for flowing air current, which passage is formed by chamfering the side of the presser, by shortening the width of the feed roller or by forming only one projection at the front end of the presser. Through the air current flowing passage, one or more flow-in air currents flow so that the accumulation of fibers does not occur easily.

Abstract: An open end rotor for a spinning machine generally comprises a rotary chamber with an open end and an opposite closed end, a first annular wall extending from the open end radially outwardly from a rotational axis and toward the closed end, and a second annular wall extending from the closed end radially outwardly from the rotational axis and toward the first wall to define a fibre collecting space. The first wall comprises an inner portion forming an angle of 55.degree. to 75.degree. with a horizontal plane, and an outer portion. A straight line extending from the outer portion forms an angle of 10.degree. to 35.degree. with the inner portion. The second wall comprises an inner portion extending from the closed end, and an outer portion forming an angle of 20.degree. to 50.degree. with a straight line extending from the inner portion of the second wall. The outer portions of the first and second wall define therebetween the fibre collecting space.

Abstract: An electroplated combing roller for use in a spinning unit of an open end spinning machine comprises an aluminum alloy cylindrical body, and a steel wire fixedly mounted in the cylindrical body. A hardened chromium plating is carried out after mounting the steel wire onto the aluminum alloy cylindrical body and the dimensions of the steel wire and aluminum alloy cylinder are interrelated in a manner such that only the exposed surface of the steel wire is plated with the hardened chromium while the exposed surface of the aluminum alloy cylinder is not so plated.

Abstract: An open end spinning machine includes a row of spinning rotors each connected to spindles rotatably supported in their predetermined axial position by associated twin-disk mechanisms and driven by a belt moving across the spindles. When the spindle is subjected to an external axial force in either of opposite axial directions due to disturbance of a right-angled relationship between the belt and the spindle, an arrangement according to the invention causes the spindle to be subjected to a force, the direction of which is directly opposite to and the strength of which is in proportion to that external axial force due to the disturbance of the right-angled relationship, whereby the spindle is maintained in the predetermined axial position.

Abstract: In an open-end spinning apparatus provided with a fiber feed mechanism, a combing roller for separating a bundle of fibers supplied from the feed mechanism into individual fibers, a spinning rotor for receiving individual fibers delivered from the combing roller and for forming a ring shaped bundle of fibers on a fiber collecting zone formed at an inside wall position having a maximum lateral diameter with respect to a rotational axis thereof, and a yarn guide means for introducing a yarn formed in the spinning rotor toward a takeup mechanism disposed at a position outside the spinning rotor, a plurality of air streams are directly blown toward the fiber collecting zone by means of air stream creating means so that the ring shaped bundle of fibers deposited on the fiber collecting surface is urged toward the inside wall of the rotor at this collecting zone by the action of the air stream together with the centrifugal force of the fibers which is created by the rotation of the spinning rotor.