Abstract: A traversing yarn guide (5) that is moved back and forth produces cross winding of yarn on a bobbin at each winding head of a textile spinning or winding machine in order to wind cross-wound bobbins. After a yarn interruption, an auxiliary yarn guide (4) in an active position keeps the yarn in a position that is raised out of the traversing yarn guide (5). In a rest position (40′), the auxiliary yarn guide (4) does not influence the yarn and the traversing yarn guide (5) can grasp and take the yarn to be wound from the auxiliary yarn guide (4).

Abstract: In an individual spindle device for rewinding delivery bobbins into cheeses, the winding head thereof is essentially constituted of the same elements and components (11, 14 to 32), and is essentially mounted in the same way as the serially arranged winding heads of a multi-station winding machine.

Abstract: In the winding of cheeses with a random pattern in a bobbin winding machine, a pattern disruption is performed during a passage through a pattern zone, and the actual diameter of the cheese (10) is determined by calculating the course of the increase of the cheese diameter to be expected and adding the expected increases in diameter occurring while winding through the pattern zones to the diameter of the cheese (10) calculated prior to reaching the pattern zone from the ratio of the number of revolutions of the cheese (10) and the winding drum (13) to the diameter of the winding drum (13).

Abstract: In a bobbin winding machine with multiple winding heads, each having a creel associated with a torque transmitter (15) adjusted by a drive element (16) for controlling the bearing load between a bobbin (10) held in the creel and a drive drum (14), buttons (18, 19) are provided for actuation by an operator for adjusting the drive element (16) and therewith the creel (12) for adaptation to a diameter of a residual bobbin to be inserted into the creel (12).

Abstract: A spinning rotor for open-end spinning machines and a method for balancing the spinning rotor in the course of a single clamping process by removing material from a cylindrical-shaped section of the collar (20) of the rotor cup (19) to form an identification mark (21) thereon sufficiently to offset an imbalance and equalize the mass of the rotor. The mark (21), which preferably consists of a combination of a graphic symbol (22) and lettering (23), is used for identification and information.

Abstract: A device for pivoting a creel of a textile machine, which holds a bobbin in contact with a roller during the winding process. The creel (2) is fastened on a shaft (5) defining a pivot axis. A lifting device (9) connected with the creel (2) has a lever (10) fixed with the shaft (5) against relative rotation. An arresting element (12) seated on the shaft (5) can be alternatingly coupled to the shaft (5) or a fixed holding element (21). When the arresting element (12) is coupled with the shaft (5), potential energy is stored in an energy storage device, which is released when the connection changes from the shaft (5) to the holding element (21), whereby the lever (10) and the shaft (5) are abruptly moved toward the arresting element (12). The device makes it possible to break the contact between the cheese (1) and the drive roller (3) quickly and dependably in case of a power failure. Interference with grasping an upper yarn end, as well as damage to the yarn and yarn positioning errors, can be avoided.

Abstract: The winding station of an automatic bobbin winding machine has a splicing device (7) for the connection of yarn ends following a yarn break. Wet splices are created by the introduction of a liquid. A capacitive sensor (13) is arranged downstream of the splicing device (7), by means of which a dielectric change is detected when the moistened yarn passes. The capacitive sensor (13) is connected with an evaluation unit (12), which generates a signal when the change falls below a predeterminable threshold value DSW (32) because of an insufficient water content. The signal trigger a cleaning cut. The signals are used for monitoring of the yarn quality and monitoring the ability of the splicing device (7) to function. The invention permits the creation of wet splices of very low moisture content, without causing malfunctions in the winding process or reducing the yarn quality.

Abstract: A method for operating a pot spinning machine which has a plurality of identical work stations each having a drafting device with a slubbing stop device, a spinning centrifuge rotating at high speed around an axis, and a tubular reciprocable guide. A slubbing emerging from the yarn guide mouth forms a rotating yarn leg which is deposited on the inner wall of the spinning centrifuge in the form of a spinning cake. At the start of a spinning cycle of the spinning machine, the individual spinning centrifuges of the spinning machine are checked for the presence of yarn cake remnants.

Abstract: A textile machine, such as a spinning or bobbin winding machine, has a plurality of identical work stations and an improved control and information system, wherein a measuring head (10, 10′) of a yarn cleaning device as well as an individual processor (14, 14′) for controlling the work station, for evaluating the signals from the measuring head (10, 10′) and for the control of the cleaning device for the yarn (8) are arranged at each work station, and wherein communications with a central processor (21) take place via a common data bus (24).

Abstract: A method and device for detecting foreign bodies in longitudinally traveling yarn (1), wherein light is directed on the yarn (1) and is reflected by its surface. Light reflected by the yarn (1) is detected by a sensor and is converted into signals. Subsequently, an evaluation of the signals is performed by comparing the signals with predetermined criteria which distinguish typical properties of foreign matter classified as tolerable, such as shell particles, from other foreign matter, such as foreign fibers, which are classified as not tolerable. Depending on whether these criteria are met, a decision is made whether a yarn interruption is suppressed or performed. In this manner, the efficiency of the production process of textile machines, such as spinning or bobbin winding machines, can be improved, and the uniformity and stability of the yarn are increased.

Abstract: A device for winding conical cross-wound bobbins has a creel pivotably mounted about a pivot axis and receiving the conical bobbin, a yarn guide traversing alongside the creel, and a yarn accumulator adapted to accumulate and pay-out a stored length of yarn. The prevailing instantaneous driven diameter (da) of the cross-wound bobbin (24) is detected by a first sensor device (48, 48′), the prevailing instantaneous position and/or the direction of travel of the yarn guide (36) is detected by a second sensor device (50, 50′), and the sensor devices (48, 48′, 50, 50′) are connected to a control device (46) which supplies a control signal for a drive (40) of the yarn accumulator (32) as a function of the signals supplied.

Abstract: A filter device (4) for a cheese-producing textile machine (1) having a plurality of pneumatic devices, e.g., open-end spinning devices (2), service units (3), etc. The filter device (4) has negative pressure filter chambers (6, 6′), each divided via a closure mechanism (9, 9′) into a main filter chamber (7, 7′) and a reserve filter chamber (8, 8′), and an intermediate chamber (14), to which a negative pressure source (5) is connected. Closable suction openings (12, 12′) and (13, 13′) in the main and reserve filter chambers, respectively, are connected with the intermediate chamber. The suction openings (12, 12′) and (13, 13′) are equipped with respective closure elements (15, 16) and (15′, 16′) which are functionally coupled such that, upon closure of one suction opening (12 or 12′), the other suction opening (13 or 13′) is automatically opened.

Abstract: A method for operating a work station (10) of a cheese-making textile machine. A work station computer (32) communicates with a tensile yarn force sensor (54) for monitoring the tensile yarn force of a yarn (22) traveling from a supply bobbin (12) to a takeup bobbin (14). A yarn tensioner (36) regulates the tensile yarn force of this yarn and a yarn cutting device (52) performs a controlled severing of the running yarn. According to the invention, the work station computer (32) predetermines the contact pressure (APD) of a yarn braking device (114, 116) of the yarn tensioner (36) acting on the yarn (22) in accordance with the tensile yarn force ascertained by the tensile yarn force sensor (54), compares the predetermined contact pressure (APDist) with a predetermined contact pressure value (APDmax), and interrupts the bobbin winding process if the limit value is attained or exceeded for a predetermined time period (t2−t1).

Abstract: A tensile yarn force sensor (7) has a measuring member (17), with which the tensile force of a traveling yarn (1) is detected as a function of the measurable pressure the yarn (1) exerts on the measuring member (17) during winding onto a cheese (2) at the work station of a multi-station textile machine, e.g., a winding machine or a combined spinning/winding machine. At preselectable intervals, a control device (11) actuates cutting of the traveling yarn (1), and triggers the performance of a zero compensation at the measuring member (17) thereby relieved of the yarn pressure, whereby external influences on the measured result are sufficiently compensated by the zero compensation, even if the chronological sequence of bobbin changes, yarn breaks or cleaning cuts triggered by imperfections in the yarn alone do not offer a sufficient opportunity for performing the required zero compensations.

Abstract: A piecing device with an evaluation arrangement for determining parameters of an automatic piecing process at a spinning station (1) of an open-end spinning frame, wherein a control device is provided which, initially in a test phase, controls the creation of at least one test piecing without a supplementary delivery of additional fiber and the subsequent removal of the created test piecing. The evaluation device is designed for determining the length of a thinner extent of the test piecing downstream of the test piecing as viewed in the direction of yarn travel, and for the determination from the detected length of the thinner extent an amount of supplementary delivery of additional fiber required for compensating the thinner extent. A reduction of the draft which is effective during the test phase assures an interference-free checking of the test piecing. The optimization phase for piecings is shortened and leads to a more accurate result when determining the supplementary delivery of additional fiber.

Abstract: A bearing of a spinning rotor 3 of an open-end spinning apparatus, in which the rotor shaft is radially supported by means of support disks and is axially positioned by a magnetic bearing. The center axis 51 of the rotor 3 is offset relative to the center axis 50 of the static bearing component 27 of the axial bearing 18 in the direction of the bearing nip 56. In addition, at least in the region of the end of the axial bearing 18 toward the support disks 54, 54′, an engagement surface 40 with an anti-friction surface layer is provided, which supports the rotor 3, especially during rotor cleaning.

Abstract: A method for performing a batch change in an automatic cheese winder, which has many identical winding stations disposed in sections and a transportation system for supplying yarn-wound spinning cops to and removing empty unwound spinning cops from the winding stations. Transport trays for transporting spinning cops or empty tubes revolve within the transportation system, which has many different transport paths, among others transverse transport paths leading to the winding stations. The clearing away of an old batch of yarn is done section by section. Thus, from the transverse transport paths of one winding station section, spinning cop-carrying transport trays are discharged until such time as that section has been cleared out. The temporary storage of empty transport trays in the transverse transport paths of a cleared winding station section is already begun while adjacent winding station sections are still being cleared.

Abstract: A cheese-producing textile machine (1), having a central control unit (37), a plurality of work stations (2), and a service unit (23), which automatically supplies the work stations (2). The work stations (2) each have a winding device with a winding drum (17), which is individually driven by a motor, and a work station computer (39). The central control unit (37) is connected via a machine bus (40) with the work station computers (39) and with a control device (39) of the service unit (23). Specific winding drum data (x, y), in particular the number of traverses (g) of the winding drum (17) of the work stations (2), are stored in a memory, e.g., integrated in the central control unit (37). During the yarn pickup by means of the yarn lifter (41) of the service unit (23) in the course of a cheese change, the individual electric motor drive (50) of the winding drum (17) is controlled to match the number of revolutions of the winding drum (17) to the number of traverses (g) thereof.

Abstract: A suction-air system of a textile machine, especially a rotor spinning machine, has at least one suction-air conduit, at least one spark sensor for detecting flying sparks within a measuring extent of the suction-air, the sensor including a measuring device with a sensing range at least partially overlapping the measuring extent, at least one electromagnetic wave receiver for generating an output signal when a spark enters the sensing range, and a driver and evaluation circuit for the measuring device. At least one source for generating electromagnetic waves is associated with the receiver and actuates a purposeful initiation of the spark sensor.

Abstract: A device for producing spun yarn by means of an airflow acting in a twisting manner on the fibers of an untwisted sliver (1) as the sliver is being conducted into and through a spindle assembly (3). The spindle assembly (3) comprises a spindle head portion (5) which conically tapers toward a spindle inlet opening (2) and is rotatable independently of a spindle core portion (7) through which the yarn is withdrawn. The device suppresses any tendency of the yarn strength to decrease at high, increasing numbers of spindle revolutions.