Abstract: A yarn making machine assembly includes a yarn spinning chamber; a feed table adapted to support a silver thereon; a feed roller having a periphery defining, with the feed table, a clearance through which the sliver is adapted to pass; an rpm-variable motor connected to the feed roller for rotating it to advance the sliver; an opening roller arranged adjacent the clearance to receive the sliver and to break it up into fibers; a sliver thickness sensor including the feed roller and/or the feed table to execute excursions in response to thickness variations in the sliver running through the clearance; a device for generating an electric signal as a function of the excursions; a regulator for receiving the electric signal and for emitting a setting signal as a function of a difference between desired and actual thickness values of the sliver; and a device for applying a signal, representing the setting signal, to the motor for varying the rpm thereof to thus alter the rotational speed of the feed roller, whereby

Abstract: Apparatus for making a yarn comprises two juxtaposed, closely spaced apart twisting drums (1), which are adapted to be driven in the same sense, and an inclined fiber-guiding duct (4), which succeeds fiber-opening means (3) and protrudes into the generally triangular twisting space (2) between the two twisting drums (1) and serves to supply singled fibers in an entraining air stream to the generally triangular twisting space (2).In order to ensure a supply of properly oriented and uniformly distributed fibers into the generally triangular twisting space (2), the length (L) of the shortest boundary wall (5) of the fiber-guiding duct (4), which wall faces the generally triangular twisting space (2), is at least as large as the average length of the longest fibers to be processed in the apparatus, the ratio of the length (1) to the width (b) of the flow area is between 10:1 and 2:1, and the entraining air stream has a mean velocity of flow corresponding to a Reynolds number of 5,000 to 50,000.

Abstract: To improve integration of fibers into a yarn end and thereby improve yarn quality, fibers are directed to a feeding nip defined on an opposite side of a pair of friction rollers forming a spinning nip. The fibers are directed out of the feeding nip, passed between the friction rollers, and forwarded into the spinning nip. One of the friction rollers may constitute a conveying roller which exerts greater force upon the fibers than the other roller to securely convey fibers through a gap between the rollers and into the spinning nip.

Abstract: The mask sleeve within the perforated roller of each spinning unit of a multi-position friction spinning apparatus is adjustable to move the suction slot of that roller between extreme positions in which an edge of the slot crosses from one side of the friction spinning nip to the other. Adjustment at each spinning unit is effected independently of the various other units of the machine by means of a rotary adjuster engaging a bifurcated end of a carrier which is itself adjustably fastened (by way of a clamp bolt) with respect to the masking cylinder. The adjuster and the carrier are outside the machine and allow adjustment of the positioning of the slot deep within the spinning unit for fine tuning purposes.

Abstract: An open-end spinning process in which the fiber sliver is separated into single fibers and in which the separated fiber material is brought by an air stream to a collecting surface from which it is drawn off while being twisted. According to the instant invention the fiber material is deposited on a collecting surface moving in the direction of thread draw-off, is then twisted and is continuously drawn off said collecting surface in form of a thread. The single fibers are fed upon the collecting surface in the direction of said collecting surface's movement, whereby an alignment of the fibers on the collecting surface takes place. The doubling process is separated from the spinning process as the fiber material is bundled and/or doubled on the collecting surface into a fiber sliver with the fiber mass required for the desired thread. The twisting process takes place independently of the collecting surface by means of a known twisting mechanism.

Abstract: An opening roller apparatus is provided for an open-end spinning arrangement of the type having a shaft supporting an opening roller base body. The opening roller apparatus includes an exchangeable fitting ring device which fits over the opening roller base body. An attaching device is provided for holding the exchangeable fitting ring on the opening roller base body. The attaching device operates free of the opening roller base body. A process for carrying out the exchanging or replacing of the fitting ring device is also provided.

Abstract: An arrangement for open-end friction spinning is provided having a one-piece component fiber feeding duct that is mounted at an opening roller housing. The opening roller housing is held in a stationary position by a holding means containing a snap closure and the opening roller housing together with the fiber feeding duct can be removed for the exposure of the yarn-forming zone.

Abstract: Fibres are spun into yarn by being opened close to a surface (S, SD) and directed to the surface, conveniently by suction (AS) through the surface. A yarn or yarn end (Y) is twisted over the surface to have opened fibres built onto it to be spun into a twisted yarn. The surface can be a groove (GD) of included angle less than 90.degree.. The close spacing (WS) of a means to open the fibres and the surface can be such that fibres being opened are within reach of the surface. The yarn is twisted by a twister such as a parallel-belt twister (TB1/TB2) close to but not part of the surface. Tension (T) is applied through the twister to draw off yarn.

Abstract: The invention concerns and open-end spinning device having two friction rollers driven in the same direction and forming a spinning notch, whereby at least the friction roller rotating towards the spinning notch is made as a suction roller, conveying the fiber material fed onto its casing surface into the spinning notch. According to invention, a collecting groove for the arriving fiber material is provided at a distance from the spinning notch, said groove being constituted by the casing surface of the friction roller rotating towards the spinning notch and by a moving guiding surface. According to the invention the surface speed of the guiding surface in the collecting groove is synchronized with the surface speed of the friction roller.

Abstract: The invention concerns an open-end spinning device with a release mechanism and two friction rollers in close proximity of each other, said friction rollers being driven in the same direction, wherein fibers are twisted together into a thread within the notch zone formed by said friction rollers, and furthermore concerns a thread draw-off device. According to the invention, the fibers are fed into the notch via a collecting surface moving parallel to the thread forming line. The collecting surface is located on the periphery of a disk-like cylinder, the rotational axis of said cylinder being located in a plane perpendicular to the notch. In a variant, the collecting surface is located on the surface of a disk or within a rotor in the form of an inner cone.

Abstract: An opening roller assembly for open end spinning machines wherein the roller is releasably and slidably supported on a drive shaft of the open end spinning machine to enable easy removal of the roller for refurbishing, replacement or repair. Non-mechanical means is provided to maintain the roller in an operative position on the drive shaft. Such means may comprise magnetic or fluid pressure means, or gravity. When in its operative position on the shaft, mechanical drive means extending directly or indirectly between the drive shaft and the roller will automatically become engaged. These drive means may be provided by a drive pin or mating engaging surfaces, for example.

Abstract: In preparation for the start of spinning with an open-end spinning apparatus, suction is provided outside a fiber transport path on the periphery of an opening roller. Such suction is greater than spinning suction which exists at the mouth of a feed channel leading to the fiber-collecting surface. The fiber stream is thereby guided beyond such mouth to be sucked off. At commencement of actual spinning, this added suction is inactivated, to permit the fiber stream to be initially supplied to the fiber-collecting surface. The fiber stream may be controlled with a suction source connected to a sucking-off orifice via a switching device and a suction line. Less conspicuous and more even thread joins are thereby obtained. Control of suction changes may be effected automatically from a servicing trolley, or in other manners.

Abstract: Method of forming spinning fibers for producing a thread, which includes applying at least one laterally limited swarm of spinning fibers continuously to an outer cylindrical surface of a rotating, perforated drum having an interior, to which suction air is applied, further transporting the spinning fibers on the drum in peripheral direction of the drum along a spatial, spiral path wherein the spinning fibers are, respectively, accelerated, decelerated and individually separated from one another, clamping the spinning fibers at an outer end of the spiral path at a clamping line between the drum and at least one clamping element engaging the drum, and continuously conducting the spinning fibers away from the clamping line to at least one thread forming device.

Abstract: An open-end rotor spinning machine includes a multiplicity of spinning boxes disposed side by side on a machine frame at spinning stations; each of the spinning boxes including: a basic frame, a first shaft disposed on the basic frame, a spinning rotor having a rotor plate being disposed on the first shaft, a rotor housing surrounding the rotor plate, a second shaft disposed on the basic frame substantially perpendicular to the first shaft, a lid-like insert covering an opening formed in the rotor housing and being pivoted about the second shaft for opening the spinning box, a thread withdrawal channel disposed on the lid-like insert, a thread withdrawal nozzle disposed on the thread withdrawal channel in the vicinity of an opening in the rotor plate, the thread withdrawal nozzle being pivotal on the second shaft out of the vicinity of the opening in the rotor plate in a given direction, a third shaft disposed on the basic frame, a bearing pivotally disposed on the third shaft, a fiber feeding and opening dev

Abstract: In a friction spinning device comprising a fiber opening assembly, a fiber feed passage arrangement, and friction spinning drums cooperating with the fiber feed passage arrangement, the fiber feed passage arrangement is divided in its longitudal direction into two passage or channel halves. At the separation or parting joints or gaps formed by connection flanges associated with the passage halves, there can be provided recesses so that a respective connecting slot is formed between the cross-section of the fiber feed passage arrangement and the separation or parting joints. In this way, there can be substantially avoided contact of fibers with the separation or parting joints.

Abstract: Fibers delivered in a freely floating state in a fiber transport passage are to be laid in a predetermined disposition on a friction spinning element, such as a friction spinning drum or disc. For this purpose, an opening region of the fiber transport passage is provided with a converging portion in which the airstream is supplementarily accelerated relative to a preceding acceleration. This supplementary acceleration serves to assist in bringing the fibers into the predetermined disposition on the friction spinning drum. The friction spinning device comprises an opening roller which is rotatably supported in a housing. The housing is connected to the fiber transport passage. The opening of the fiber transport passage extends close to a cylindrical surface of the friction spinning drum. The fibers leaving the opening are transported on the friction spinning drum towards a yarn formation position where they are twisted into a yarn which is withdrawn in a selectable withdrawal direction by withdrawal rollers.

Abstract: In the case of an open-end friction spinning machine having a plurality of spinning units, each having a feeding and opening device with a feeding roller for the feeding of a sliver and with an opening roller for the opening of the fed sliver into individual fibers to be fed to a wedge-shaped gap, an automatic piecing process is provided. In the case of this piecing process, an already spun yarn end is returned into the wedge-shaped gap and, by means of a piecing, is pieced to newly fed fibers. It is provided that the quantity of fibers to be pieced by means of the returned yarn end is for each piecing process adjusted to a constant value by the fact that for each piecing process a sliver end is fed to the opening roller that has the same characteristics.

Abstract: In the case of a device for open-end friction spinning having two friction rollers that are arranged next to one another to form a wedge-shaped gap and are drivable in the same rotational direction, an arrangement is provided for the feeding and opening of a sliver which contains an opening roller from which a fiber feeding duct leads to the wedge-shaped gap. A compressed air duct that is led past the opening roller is connected to the fiber feeding duct for supporting the fiber transport. A dirt discharge opening assigned to the circumference of the opening roller is arranged at a distance to the compressed air duct in such a way that the effect of the excess pressure does not reach back into the area of the dirt discharge opening.

Abstract: A spinning device for manufacturing a twisted thread at least partially formed of spinning fibers, includes a perforated drum rotating about a given axis of rotation, a suction device disposed in the drum, the suction device having at least one suction opening formed therein extended substantially parallel to the given axis of rotation, a device disposed outside the drum opposite the suction opening for forming a wedge-shaped area for spinning fibers, a device for conducting flying spinning fibers into the wedge-shaped area, and a device for pulling out a spun thread substantially parallel to the given axis of rotation, the forming device including a shell carrier rotating about a longitudinal axis and a flexible shell disposed on the shell carrier.

Abstract: An apparatus and method for producing a spun yarn having true twist comprising extracting staple fibers from a bundle of staple fibers; and collecting the extracted staple fibers on the periphery of a spinning rotor; and recontacting the extracted fibers with the bundle of staple fibers to form a combined untwisted yarn; and twisting the combined untwisted yarn to produce a twisted yarn; and withdrawing the twisted yarn from the spinning rotor.

Abstract: A feeding and opening device for open-end spinning machines is disclosed with a feeding table cooperating with a feeding roller and containing a fiberbeard support that is opposite the opening roller. The feeding table with fiberbeard support is held so that it can be swivelled from its operating position into a cleaning position. The swivelling can be carried out manually or by means of an adjusting element of an automatic servicing device. By means of the swivelling-away of the feeding table, the support surface of the fiberbeard support is exposed so that it can be cleaned in order to remove sticky components, such as honey dew or similar components.

Abstract: This invention relates to an apparatus for emergency fiber supply to a spinning unit in an open-end spinning machine. According to the invention, a sensing unit controls an electromagnetic coupling and fiber supply device, such that a break in the yarn is rapidly detected and the fiber supply is immediately disengaged, even if the conventional thread breakage detector fails.A sensing unit is disposed in that portion of the wall of a cover that extends into the spinning rotor interior. It is adapted to respond to the excess accumulation of unspun fibers and/or an undue increase in temperature by disconnecting the electromagnetic fiber supply coupling via the thread breakage detector circuit to which it is connected. The sensing unit can be a pressure sensitive microswitch, a bimetallic relay, a thermistor, or a combination of these elements.

Abstract: An opening roller and a process for making an opening roller for open-end spinning machines is disclosed where wavy shaped toothed rings and intermediate rings are alternately slid on a preferably cylindrical part. The toothed rings and the intermediate rings are clamped between axial stops. It is provided that during the clamping of the toothed rings and the intermediate rings between the axial stops, the intermediate rings are plastically deformed. Thus it is achieved that without narrow manufacturing tolerances, the toothed rings and the intermediate rings rest against one another without gaps so that fibers cannot be caught during use of the opening roller.

Abstract: An arrangement is disclosed for open-end friction spinning with two adjacently arranged friction rollers driven in the same rotational direction and forming a wedge shaped yarn forming gap. An inlet and opening device is provided for feeding single fibers to the wedge gap, and a yarn withdrawal device is provided for drawing off the yarn being produced in the longitudinal direction of the wedge gap. Between the inlet and opening device and the friction rollers a closed fiber feed channel is arranged which includes devices for reducing the flight speed of the fibers so that the optimum high speed operation of the opening device is facilitated while the fiber speed is subsequently reduced to optimize the yarn forming process.

Abstract: An open-end friction spinning arrangement is disclosed with two adjacently arranged rollers driven in the same rotational direction and forming a wedge-shaped yarn forming gap with their cover surfaces. It is provided that the cover surfaces of at least one of the rollers is designed such that it includes different axial zones in the area of the yarn formation region and in the yarn withdrawal direction, in which different radial forces and/or different rotational speeds act upon the yarn being produced.

Abstract: A method and apparatus for open-end friction spinning is disclosed having two adjacently arranged friction rollers, driven in the same rotational direction and forming a wedge-shaped gap therebetween. A suction device effective in the area of the gap as well as a fiber feed channel leading to the gap and a yarn withdrawal device for drawing off the produced yarn in the direction of the gap are also provided. It is further provided that the mouth of the fiber channel extending at a tangential angle to the gap is widened in the area of the gap in that the channel wall facing the same is formed with a rounded curve. By these measures the fiber deposition in the gap is improved by modifying the fiber transport air stream path to deposit the fibers in a straightened and parallel manner in the gap.

Abstract: Method of preparing fibers fed from a fiber-loosening device into a wedge-shaped spinning zone of a friction spinning machine having friction elements moveable relative to one another, which includes feeding a fiber-laden carrier-air flow having a component directed parallel to the wedge-shaped spinning zone tangentially to one of the friction elements at a location outside the wedge-shaped spinning zone and in a direction opposite the direction of movement of the one friction element, simultaneously exerting holding forces on the fibers and flinging the fibers against the moving surface of the one friction element so that the fibers are stretched out and held fast thereon, conveying the fibers in held-fast condition thereof into the wedge-shaped spinning zone, rolling the fibers therein and integrating the fibers into a yearn, and drawing-off the thus-formed yarn.

Abstract: The housing (1) of a opening device for an open-end spinning apparatus is lined by a thin-walled insert (3) which exhibits a perforation for the discharge of material (dirt, fibers) from the interior space of the housing (1). For the protection of the edge (310) bounding this perforation downstream relative to the fiber flow, an edge protector (4) is provided which is slidable onto the edge (310) engaging over the latter. For sliding the edge protector (4) onto the edge (310) to be protected, or for stripping it therefrom, a combined insertion and ejection tool (5) is provided which is introducible into the insert (3) and movable with a contact surface (51) along the peripheral wall (33) of the insert (3). The combined insertion and ejection tool (5) has a receiving throat (6) for the temporary reception of the edge protector (4) with a step (60) overhanging the contact surface (51) and in turn exhibiting a stripping edge (67).

Abstract: A method for open-end spinning, in an apparatus having a stationary fiber-collecting groove formed therein with two ends and a bottom, includes continuously carrying and transporting fibers into the stationary fiber-collecting groove with an airstream, continuously venting the bottom of the groove, withdrawing the fibers from one end of the groove, and continuously uniting the fibers to form a thread, and an apparatus for carrying out the method.

Abstract: A spinning apparatus for a fasciated yarn is provided which comprises a fiber-opening means provided with a combing roller, a fiber-collecting means including an inlet member and a rotor, a twist-imparting means consisting of an air nozzle, and a yarn take-up means. A sliver opened by the combing roller is fed to the interior of the rotor through the inlet member. Since the rotor and the inlet member rotate reversely to each other, the fibers are evenly distributed on an inner surface of the rotor. An intermediate yarn drawn out from the rotor is supplied to the air nozzle under an overfeeding condition, whereby a good fasciating effect is imparted to the resultant yarn by a vortex. Prior to feeding the yarn to the air nozzle, the yarn may be drafted between two pairs of rollers. The apparatus is easy to maintain because a roller drafting means having an apron which rapidly wears due to high-speed processing is not utilized.

Abstract: In an opening unit for open-end spinning machines, which comprises a housing and a roller lined with sawtooth wire and rotatably arranged in the housing for separating the fibers along their path from the inlet to the outlet of the opening unit, a dirt separation duct is provided in the housing and is maintained under a reduced pressure. In the wall of the housing adjacent at least one side of the dirt separation duct a parallelizing element is inserted which comprises a plurality of saw tooth wire sections arranged in a side-by-side relationship and serving to balance the adverse effect of the dirt separation duct on the parallel flow of fibers on their path through the opening unit.

Abstract: A method of open-end spinning a yarn formed of two different types of fibers of staple fiber and a yarn formed thereby in which most of the outer fibers are formed of one type of fiber and most of the inner fibers are formed of the other component. The types of fibers are integrally linked by orienting and distributing the fibers as they approach the open end such that they lie substantially parallel to the open end and overlapping whereby part of some of the fibers of the inner type of fiber wrap around some of the fibers of the outer type of fiber.

Abstract: An insert (3) is arranged in the interior space (10) of a housing (1) of an opening device for an open-end spinning apparatus. The insert (3) is of pot-like construction with a recess (35) provided in the base (34). The recess (35) exposes a bearing bore (18) through which a drive shaft extends for supporting the opening roller. A fixing device (41, 42) is likewise associated with the insert (3) securing its relative position to the housing. A guide element (5) introducible into the insert (3) is provided to guide the insert (3) during introduction into the housing (1) or during its removal. This has a contour corresponding to the interior space (10) of the housing (1) and one or more positioning lugs (50) on its end face opposite the base (34), corresponding to the number of the positioning cavities provided in the insert (3).

Abstract: An opening roller unit for open-end spinning installations as a shaft supported in a bearing box and an opening roller arranged on an end of the shaft which projects from the bearing box. The opening roller extends over the bearing box in a manner forming a cavity that is sealed toward the outside with an annular sealing gap and comprises the base member and the ring detachably secured thereto which has a fitting provided on the outer periphery thereof. The detachable ring is mounted upon the base member in a manner blocking the external axis to the cavity. In accordance with one preferred embodiment, the ring of the opening roller extends over the bearing box and the cavity is defined by the ring and bearing box, while the scaling gap is provided between the ring and the bearing box in conjunction with an annular insert attached to the bearing box.

Abstract: A method and apparatus for open-end spinning of novelty yarn produces novelty yarns in a simple manner. A sliver is fed to the fiber separating device of an open-end spinning apparatus to form distinct fibers, the fibers are air transported in a fiber flow path to the twisting device, controlled formation of effects (particularly slubs) is effected during air transport of the distinct fibers in their path, the formed effects are intermittently passed to the twisting device (e.g. pseudo-randomly), the fibers fed to the twisting device are twisted into a continuous strand of effect yarn (particularly slub yarn), and the continuous strand of effect yarn is taken up. The controlled formation of effects may be accomplished in a number of manners: introducing a needle making an angle of 25.degree.-45.degree.

Abstract: In a fiber opening device in open-end spinning unit, having a combing roller which is encased by a casing and forming a fiber transferring passage between said combing roller and said casing, a wear-resistant member, preferably a member having a pin shape, is provided at an edge of an opening, e.g. a trash exit port opening formed in said casing and communicated with said passage. The structure of the fiber opening device according to the present invention makes possible easy installation of the wear-resistant member, and prevents harmful wear or bruising at said edge portion of the opening in the casing.

Abstract: An open-end spinning machine having a plurality of spinning units (5) arranged side by side in a row extending in the longitudinal direction of the spinning machine. Each of the spinning units (5) has a filter (11) disposed at the front surface thereof and extending for substantially the entire width thereof. All the filters (11) arranged on the spinning units (5) disposed at one side of the spinning machine lie on a substantially identical imaginary plane slightly upwardly inclined from a horizontal plane when seen from the front to the rear. Each spinning unit includes a duct means (13) having air passages (15, 23, 27, 31) extending from the openings (13a, 13b, 13c, 13d) located adjacent to the filter (11) to the upper surface of a feeding roller (25), the upper and lower surfaces of a combing roller (21), and the periphery of the combing roller (21).

Abstract: The present invention relates to a method and apparatus for lining a housing which receives an opening roller of a fiber opening device for an open-end spinning apparatus by means of a finite metal band, wherein the housing comprises apertures in its generated surface which connect the interior of the housing to other parts of the spinning apparatus and to which apertures in the metal band correspond.

Abstract: The present invention concerns the production of fancy yarns, in which during open-end spinning a roving is supplied program-controlled to the spinning unit for the yarn to be produced. According to the invention at least one roving bobbin is supported by a support member, which is detachably arranged on a can used as a receptable for the fibre material to be processed. The bobbin creel used up to the present for the bobbins impairs the accessability of the winding locations for the fancy yarn produced. This creel, according to the invention, no longer is required. Thus, the cumbersome mounting and dismantling of the creel in changing over from normal yarn to fancy yarn and vice-versa is dispensed with. According to the invention the alterations required for such changes of the yarn production mode are extremely simple.

Abstract: The invention relates to a method of and an apparatus for open-end spinning a novelty yarn (especially slub yarns), and the yarn so produced. A sliver is fed to the fiber separating device of an open-end spinning apparatus to form distinct fibers, the fibers are air transported in a fiber flow path to the twisting device, controlled formation of effects (particularly slubs) is effected during air transport of the distinct fibers in their path, the formed effects are intermittently passed to the twisting device (e.g. pseudo-randomly), the fibers fed to the twisting device are twisted into a continuous strand of effect yarn (particularly slub yarn), and the continuous strand of effect yarn is taken up. The controlled formation of effects is preferably accomplished by introducing a needle into the fiber flow path in the transport section, the fibers collecting on the needle. The fibers are passed to the twisting device by withdrawing the needle from the fiber flow.

Abstract: An opening roller unit for open-end spinning installations as a shaft supported in a bearing box and an opening roller arranged on an end of the shaft which projects from the bearing box. The opening roller extends over the bearing box in a manner forming a cavity that is sealed toward the outside with an annular sealing gap and comprises the base member and the ring detachably secured thereto which has a fitting provided on the outer periphery thereof. The detachable ring is mounted upon the base member in a manner blocking the external axis to the cavity. In accordance with one preferred embodiment, the ring of the opening roller extends over the bearing box and the cavity is defined by the ring and bearing box, while the scaling gap is provided between the ring and the bearing box in conjunction with an annular insert attached to the bearing box.