Abstract: The invention relates to a spinning device which according to the invention with FIG. 2 differs from the prior art of FIG. 1. In the prior art, the fibres delivered through a fibre conveying channel (13) (compaction due to slight twisting) are guided around the tip of a needle (5) into a yarn guidance channel of a spindle (6) and thereby compacted, whereby this guidance takes place as a result of an air flow created through the nozzles (3). The tip of the needle (5) has the purpose, on the one hand, of guiding the fibres and, on the other, of avoiding a false twist having a reverse effect back through the fibre conveying channel as far as, for example, a clamping gap of a pair of delivery rollers due to the rotation of the fibres, since such a false twist would at least interfere with the formation of the yarn, if not preventing it altogether.

Abstract: The application relates to a device for air spinning, i.e. for the manufacture of a spun thread (10) from a staple sliver (1, 24). The device contains in particular a fibre guide element (3, 22), a fibre conveying channel (4), and an eddy chamber housing (15) attached to the fibre guide element (3, 22). The eddy chamber housing (15) contains in its turn a spindle (7) arranged at a distance interval from the fibre guide element (3, 22), with a yarn guide channel (8). In addition, the eddy chamber housing (15) contains a fluid device with at least one jet nozzle (13.1) for the production of an eddy current (11) about the inlet aperture mouth (9) of the yarn guide channel.

Abstract: The invention relates to a device for the production of a spun thread (10) from a staple fibre strand (1) by means of air spin method. The fibre guiding element (3c) according to the invention comprises a fibre conveying channel (4) with a fibre guiding surface, whereby the fibre guiding surface ends at a fibre presenting edge (6) and leads the fibres of the staple fibre strand (20) in the form of an essentially flat arrangement lying next to each other. The fibre-guiding surface (18, 18.1, 18.2, 18,3) is configured in such a manner that it comprises a diverting point (17) which causes a deviation of the staple fibre strand (20), whereby the deviation is being provided in such a manner that the free fibre ends (19) of the fibres within the staple fibre strand (20) protrude from said staple fibre strand.

Abstract: The present invention concerns a spinning method and a spinning apparatus for producing a yarn (13) from fibres (7). In a spinning chamber (2) the fibres (7) are subject to a rotating air vortex (15) and in this process are twisted into a yarn (13) in an inlet opening of a spindle duct (11) of a spindle (12). The fibres to be processed (7) are guided via at least one fibre feed duct (20, 21) into the spinning chamber (2). The present invention proposes that fibres (17), which are not caught into the yarn formation process are eliminated via an exhaust air duct (16), that these eliminated fibres (17) are regenerated, and that the regenerated fibres (17) are fed back into the yarn forming process.

Abstract: For producing a yarn (4) spun from a loose fibre array (2) using a vortex flow an apparatus is used in which between a fibre supply duct (1) and a yarn take-off tube (5) a vortex chamber (3) is provided. Into the vortex chamber (3) a fluid is injected via tangentially oriented nozzles (6), which subsequently is drained via an exhaust duct (7). This apparatus comprises a wall limiting the vortex chamber downstream zone formed e.g. by a wall plate (20). This plate separates the vortex chamber (3) from the exhaust duct (7), but for completely draining the fluid is provided with a plurality of openings (21) extending to the exhaust duct (7). Owing to the functional separation of the vortex chamber (3) from the exhaust duct (7), in which the inventive apparatus differs from the state of the art, the fibre losses are reduced.

Abstract: The measure for influencing the flow in the yarn guide duct is that the flow in the spindle channel is influenced after the fiber guide surface to the spindle cone and by the inlet opening into the spindle channel by means in such a way that the entrance behavior of the fiber ends and the spreading of the rear fiber ends occurs in weak or suppressed counter-flow or in co-flow and that said means are flow-active connections between the outflow channel and the spindle channel, e.g. passages by means of bores or by using fluid-permeable sintered materials.

Abstract: The ring spinning method drafts a sliver in a multi-stage drafting system where the sliver acquires a total draft in a range of from 60 to 150-fold. Following outlet from the last nip of the drafting system, the drafted sliver is conveyed without drafting over a guide path in which the fiber band is condensed to form a compact fiber strand of not more than 2.5 millimeters width and preferably less than 1 millimeter in width. At the end of the guide path, the fiber strand passes through a twist inhibiting nip between two rollers and is then passed by twist distribution to a ring spinning device. The yarn produced possesses a quality with respect to hairiness and neps.

Abstract: The ring spinning method drafts a silver in a multi-stage drafting system where the silver acquires a total draft in a range of from 60 to 150-fold. Following outlet from the last nip of the drafting system, the drafted silver is conveyed without drafting over a guide path in which the fiber band is condensed to form a compact fiber strand of not more than 2.5 millimeters width and preferably less than 15 millimeter in width. At the end of the guide path, the fiber strand passes through a twist inhibiting nip between two rollers and is then passed by twist distribution to a ring spinning device. The yarn produced possesses a high quality with respect to hairiness and neps.

Abstract: A drafting apparatus for drafting a sliver in the yarn spinning machine preferably comprises upper and lower inlet rollers (2, 3), upper and lower apron belts (9, 6), upper and lower apron belt guides (10, 7) and upper and lower outlet rollers (4, 5). The upper apron belt (9) passes around the upper inlet roller (3) and the upper apron belt guide (10) and the lower apron belt (6) passes around the lower inlet roller and the lower apron belt guide (7) and cooperates with the upper apron belt (9) to define a nipping area (22) between the belts for nipping the fiber sliver (20) as it passes between the upper and lower inlet rollers while being sandwiched between the upper and lower apron belts (9, 6). The sliver is nipped in the nipping area (22) and is subsequently directed by the belts to a nip (25) formed between the upper and lower outlet rollers.

Abstract: A spinning ring of a ring spinning machine has an inclined flange which is configured such that a travel surface at the inner surface of the spinning ring has a radius (R2) which amounts to about 25 mm. and which merges into a radius (R1) which, at the location of the smallest inner diameter of the spinning ring, amounts to at least 1 mm. A rim or bead at the travel portion of the spinning ring has a height (H) which at most is about one-half larger than the thickness (K) of the rim. Consequently, there can be used travellers having small outer dimensions, so that there can be selected a larger wire thickness of the traveller material. In this way, the service life of the traveller in the ring spinning machine is increased in relation to the prior art.

Abstract: A novel false twist spinning process in which a sliver (60) is twisted by a mechanical force-twisting device (58) between the front rollers (54) of the drafting unit (51) and the draw off rollers (59). The spinning tension is so adjusted that the false-twisted sliver (60) is prevented from assuming a helical shape and a balloon shape at least in the zone between the nip line (10) of the drafting unit (51) and a yarn guiding element (55) disposed before the false twisting device. In an apparatus for the practice of the process, the mechanical false twisting device (58) comprises discs (58A) or aprons (58B) and the yarn guiding element (55) comprises of a false twisting nozzle (55A, 55B).

Abstract: A nozzle mechanism for generating a twist in a yarn in an air-jet spinning machine, the nozzle comprising a central cylindrical duct having an axis through which a yarn is delivered in a selected direction and a bore having an axis and a diameter entering tangentially into the cylindrical duct for inputting compressed air into the duct, the bore entering the duct such that the axis of the bore forms an obtuse angle with the axis of the duct, the bore further entering the duct such that the perpendicular distance between the axis of the bore and the point of tangential entry of the bore into the duct is less than half the diameter of the bore.

Abstract: Method of forming a nozzle for use in air jet thread spinning processes, the nozzle comprising a body of selected steel material having a thread passage with an axis extending the longitudinal length of the body and one or more lateral bores entering tangentially into the passage, the method comprising the steps of selecting a raw unhardened steel material which is hardenable by heat or nitriding treatment; forming the body of the nozzle including the passage and the lateral bores out of the selected raw steel material; and hardening the formed body of raw steel material to a hardness of at least about 50 HRC.

Abstract: The delivery roller pair are made with continuous uninterrupted cylindrical surfaces so that air flows on the input side converge in the nip and then flow from the central zone thereof to opposite end zones. In addition, the air flows on the output side flow from the end zones towards the central zone. The suction nozzle is disposed downstream and in alignment with the nip so as to receive the fiber material for spinning into yarn.

Abstract: The drawframe has a preliminary drafting zone with a draft of from 4 to 8 as well as a main drafting zone with a draft of at least 30. In addition, a deflecting rod is disposed in the preliminary drafting zone in order to deflect the flow of fiber by about 1 millimeter. The deflecting rod is positioned centrally between the nips of the rollers defining the preliminary drafting zone. The guide surface of the deflecting rod may be convexly rounded not only transversely but also longitudinally in guiding the fiber flow thereover.

Abstract: The method and apparatus for supplying a reserve feed stock to a spinning machine or spinning position thereof, contemplates monitoring the operational state of a production feed stock and upon reaching a predeterminate operational state thereof, such as near depletion or depletion of the production feed stock, or even rupture thereof, bringing a reserve feed stock previously held in readiness into a production position where such reserve feed stock now assumes the role of a production feed stock. Consequently, downtime of the spinning machine or spinning position can be minimized and its operation at least partially automated since there is always available a reserve feed stock to allow for essentially continuous or continual production of a spun yarn or thread. One specific piecing technique uses a movable member for placement of a reserve feed stock into the travel path of a production feed stock such that piecing of these two feed stocks is reliably attained.

Abstract: There are formed at the wall of the friction spinning element bores or holes with a predeterminate bore diameter and a coating on their side facing a fiber feed duct, the coating extending over the bore edges into the bores or holes. Each bore or hole thus formed has a diameter at the bore or hole entrance or inlet which is smaller than the bore diameter of the related bore or hole. Each bore or hole has a cross-sectional area of less than 0.283 mm.sup.2, but amounting to at least 0.07 mm.sup.2. In this way, the undesirable penetration of fibers or fiber parts into the bores or holes is prevented as far as possible when air flows through the bores or holes at the side of the coating, while retaining a hole form or configuration which is favorable from the standpoint of airflow and blockage of the bores or holes.

Abstract: A friction spinning machine comprising a perforated roller (6) and an imperforate roller (19) is so designed that high-quality yarn can be produced in various sizes and with adequate strengths at a relatively high rate of output. The adjustment parameters necessary to solve this problem are specified in detail, more particulary those determining the position, orientation and shape of the fibre feed duct (5).

Abstract: To improve the efficiency of a rotating air layer produced by an air injection nozzle and rotating in a substantially cylindrical space, the rotating air layer being intended to rotate a twisted fiber structure introduced through an inlet duct, there is provided a tube extension at the inlet duct. This tube extension forms a guide for the air flow injected tangentially and at an inclination by the air injection nozzle with respect to the direction of travel of the twisted fiber structure. As a result of this guide, the rotating air layer can form before it engages or contacts the twisted fiber structure. As a result there is increased the rotation of the engaged twisted fiber structure per unit length thereof, resulting in increased strength of the twisted fiber structure and the yarn ultimately produced therefrom with low air consumption.

Abstract: The wall of the friction spinning element has bores or holes with a predeterminate bore diameter and a coating on their side facing a fiber feed duct, the coating extending over the bore edges into the bores. Each bore or hole thus formed has a diameter at the bore or hole entrance or inlet which is smaller than the bore diameter of the related bore or hole. Each bore or hole has a cross-sectional area of less than 0.283 mm.sup.2, but amounting to at least 0.07 mm.sup.2. In this way, the undesirable penetration of fibers or fiber parts into the bores or holes is prevented as far as possible when air flows through the bores or holes at the side of the coating, while retaining a hole form or configuration which is favorable from the standpoint of airflow and blockage of the bores or holes.