Abstract: An open-end spinning unit includes a rotor housing and a rotor revolving in the rotor housing and having a fiber collecting groove formed therein defining a groove bottom. An apparatus for cleaning the rotor includes a cleaning device having a scraper to be positioned in a predetermined position in the fiber collecting groove of the rotor. The scraper automatically assumes an optimal length independently of its abrasion from wear upon entry of the cleaning device into the rotor, for assuring a secure placement of the scraper in the bottom of the fiber collecting groove.

Abstract: A method and apparatus for correcting an interruption of yarn travel resulting in a trailing yarn end from a take-up bobbin and a leading yarn end from a feed bobbin, wherein after the interruption of yarn travel, the take-up bobbin is braked to a stop and a sensor detects the absence of the trailing yarn end from the take-up bobbin. If the absence is detected, the take-up bobbin is rotated in the take-up direction until the trailing yarn end is wound onto the take-up bobbin. If the absence is not detected, it is assumed that the trailing yarn end is wound onto the take-up bobbin. A catcher nozzle is provided for aspirating the trailing end if it is not wound onto the take-up bobbin, and the sensor is associated with the catcher nozzle. A suction nozzle is provided for aspirating the yarn end from the peripheral surface of the take-up bobbin and placing the trailing yarn end in a yarn end joining device where it is joined to the leading yarn end.

Abstract: In the course of rewinding yarn on a bobbin winding machine, the yarn performs a balloon-like oscillation around the delivery bobbin. The shape of the balloon has an effect on the yarn tension force and thus on the behavior of the yarn during winding. To reduce resulting tension fluctuations and particularly tension peaks, the course of yarn travel is influenced by means of a device in accordance with the present invention having an annular yarn guide surface comprised of a first set of guide surfaces collectively forming a part of a truncated cone the larger diameter of which is adjacent the delivery bobbin and a second set of guide surfaces collectively forming converging edges of an at least five-sided truncated pyramid with each pyramidal edge being disposed to extend axially between two adjacent first guide surfaces forming recessed notches in their collective conical surface.

Abstract: Spinning stations of open-end spinning frames are cleaned from time to time to increase productivity, e.g. each time a sliver can change is made although, if the times between the exchange of two cans are too long, cleaning may be performed at a preset cycle. The sliver must be removed from the spinning station for this purpose. To be able to reintroduce a defined length of the removed sliver into the spinning station at the end of a cleaning operation, the end of the sliver is aspirated from between the draw-in roller and the gripping table of the spinning station by means of an aspiration and blower nozzle and pulled out of the spinning box of the spinning station and, after the cleaning operation, the sliver is introduced into the spinning station by means of the aspiration and blower nozzle. The aspiration nozzle has an insert with bores for causing the tip end of the sliver to assume a particular shape.

Abstract: A textile machine includes a bobbin winder for winding a textile bobbin having a longitudinal axis, a given length and a yarn package with a peripheral surface. A drive roller assembly includes a drive roller for rotationally frictionally driving the textile bobbin. The drive roller has an active width being substantially less than the given length of the bobbin. The drive roller has contact lines for contacting the peripheral surface of the yarn package of the bobbin. The contact lines are chronologically successive during rotation of the drive roller and are shifted relative to one another in the direction of the longitudinal axis of the bobbin.

Abstract: A method and apparatus for controlling a winding station of a bobbin winding machine when changing a take-up bobbin includes driving the take-up bobbin by contact with a yarn guide drum depositing a yarn, and bringing the take-up bobbin to a standstill by controlled deceleration of a rotary speed of the yarn guide drum after ascertaining that a predetermined yarn quantity has been reached, until the yarn guide drum comes to a standstill. This is done while producing a varying slip between a surface of the yarn guide drum and a surface of the take-up bobbin effecting ribbon prevention but being limited to avoid knocking the yarn off the bobbin and damage to the surface of the bobbin. A winding station of a bobbin winding machine includes a yarn guide drum driving a take-up bobbin by contact while depositing a traveling yarn on the take-up bobbin. A drive mechanism for the yarn guide drum has a rotary field motor. An electronic yarn cleaner monitors the traveling yarn.

Abstract: A textile winding machine has a plurality of winding stations and a servicing device which travels along the winding stations. The winding stations are connected with an empty tube magazine disposed at the end of the machine via a conveyor extending along the machine. A manipulating device is provided at each winding station for transferring an empty tube into an intermediate tube storage location of the winding station. The manipulating device has a tube gripper pivotable between a tube pick-up position at the conveyor and a tube release position at the intermediate storage location. The servicing device replaces cheeses which have attained a predetermined diameter with empty tubes by transferring an empty tube out of the intermediate storage location of the respective winding station. In the process, the fill state of the intermediate storage location is monitored by a sensor system installed on the cheese changing servicing device.

Abstract: An assembly for transporting empty tubes and cops in a ring-spinning machine. Driven conveyor belts are disposed alongside rows of spindles disposed on both sides of the ring-spinning machine. The conveyor belts are driven for delivering empty tubes to and removing cops from the spindles, and the conveyor belts have openings formed therein at a mutual spacing approximately corresponding to half the given spindle spacing for securing arbors for alternatingly supporting empty tubes and cops. Instead of the arbors, however, at least every other opening supports a driver which engages one of a plurality of caddies at an indentation formed in a support surface thereof and entrains it along the conveyor belt. Each of the caddies carry an arbor for an empty tube and for a cop. The caddies have a length which is less than the given spindle spacing. Guide tracks extend along the conveyor belts and they guide the caddies along the conveyor belts.

Abstract: A textile winding machine having a plurality of work stations each of which has a number of pneumatically actuable operating components. The operating components are connected to separate compressed air lines each having at least two compressed air supply locations each associated with a respective pressure controller. The compressed air lines are dividable in turn into machine segments operating at different pressure levels by means of selectively actuable valve elements disposed in the compressed air line between the pressure controllers.

Abstract: An apparatus for prepositioning a yarn end on a spinning cop for subsequent unwinding in a bobbin winding machine accomplishes improved functional capabilities by providing a positionally changeable yarn guiding device as well as a yarn retaining device. A part of the yarn guiding device which comes into contact with the yarn can be moved from an active position below the upper edge of the cop into an inactive position above the cop nose. The yarn retaining device has an opening for yarn entry. By way of a control device, the yarn guiding device is controlled to take up the inactive position following the placement of nose windings about the cop nose, and a device for inserting the remaining yarn end portion into the tubular interior of the cop is then activated and the yarn retaining device is taken out of contact with the upper edge of the cop. Preferably, the yarn inserting device comprises a tubular arbor which can be positioned centrally above the cop to function as a yarn end blower nozzle.

Abstract: A bobbin winding machine includes a multiplicity of winding stations for rewinding spinning cops. Each of the winding stations has a bobbin magazine for holding the cops and a bottle-like unwinding chamber having a bearing shaft and an arbor being pivotable about the bearing shaft. The unwinding chamber surrounds a cop being fixed on the arbor during unwinding. At least a portion of the unwinding chamber is formed by a cop chute being pivotable between a cop transfer position and an unwinding position. The unwinding chamber has a shell partly encompassing a cop during unwinding.

Abstract: A pallet transport system for a textile cheese winding machine includes a cop delivery and storage track for supplying cops to be rewound, an empty tube return track, and a plurality of transport tracks each extending through one winding head of the bobbin winder transversely between the supply and return tracks. The entrance region of each transverse transport track is closable by selectively operable blocking mechanism disposed in operation to permit empty pallets to enter the transverse transport track while pallets equipped with cops are shunted. In this manner, the transverse transport tracks serve as a storage device for empty pallets which provides the advantage that, at the completion of a batch, the time needed by the bobbin winder to properly end the batch is shortened, and hence the machine's efficiency is increased.

Abstract: An open-end spinning apparatus includes a rotor housing. A spinning rotor revolves in the rotor housing. A spinning insert is disposed coaxially to the rotor housing and is rotatably supported relative to the spinning rotor. The spinning insert has a yarn guide channel enabling entrainment of the spinning insert by a yarn during normal spinning operation. A coupling device fixes the spinning insert to the spinning rotor during a run-up of the rotor.

Abstract: A rotor spinning apparatus includes a support frame stationarily disposed on a frame of a spinning machine. A bearing is disposed on the support frame. A spinning rotor is disposed on the bearing and has a rotor axis and a rotor opening. A rotor housing surrounds the spinning rotor. A lid element is rotatably supported about a pivot axis. The pivot axis is oriented orthogonally to the rotor axis and is disposed approximately vertically beneath the rotor opening. The lid element covers the rotor housing and has a sliver feed roller, an opening roller, a fiber guide channel plunging into the rotor opening, a yarn draw-off opening, and a dirt separator.

Abstract: An apparatus for automatically forming yarn reserve windings selectively on either end of an empty tube prior to winding a yarn package thereon utilizes a threaded spindle and spindle nut assembly for supporting one of a pair of tube clamping plates for selective longitudinal displacement of a tube clamped therebetween during rotation of the tube to place the yarn reserve windings thereon. The hand of the threaded connection between the spindle and spindle nut determines the longitudinal direction in which the tube is displaced and, in turn, determines the end of the tube about which reserve windings are to be formed. In one embodiment, the spindle and spindle nut assembly are exchangeable for a like assembly formed with opposite threads, thereby to alter the longitudinal direction of tube displacement.

Abstract: The handling of textile bobbins and textile bobbin tubes, particularly in yarn end preparation of textile bobbins, is improved by the pallet of the present invention which has an arbor of longer axial length than the textile bobbin tube it supports so as to protrude sufficiently from the textile bobbin tube that the arbor can be gripped while the textile bobbin remains supported on the pallet. A releasable connection between the base plate and arbor of the pallet in the preferred form of a functionally detachable plug-type snap connection allows for a temporary separation of these components. A pot-like covering body for the textile bobbin is connected to the base plate, particularly for conical or cylindrical cross-wound bobbins.

Abstract: Because of the pot spinning process, it is more difficult to automate the supply of empty tubes, respooling of the spinning cake on an empty tube, and the removal of the spinning cops in a pot spinning machine than with other spinning processors. The present invention provides a completely automatic exchange of spinning cops for empty tubes at the spinning stations of a pot spinning machine by utilizing the yarn guides of pot spinning stations to place full yarn cops produced thereat into an upright position on carriers located on a movable conveyor extending underneath the spinning pots. With the spinning cops deposited onto the conveyor and with the yarn guide returned to a spinning position, the conveyor can transport the carriers with the spinning cops away and can deliver empty tubes to the spinning stations for receipt by the yarn guides to continue the spinning process.

Abstract: A method for winding a yarn reserve a tube of a bobbin before a yarn package is wound includes initially applying a piece of yarn on an end of a tube of a bobbin while leaving a free yarn end. The piece of yarn is covered and fixed in place with a small number of yarn windings of a yarn reserve. The free yarn end is severed on the tube between the yarn reserve and the tube end while the bobbin is rotating. An apparatus for winding a yarn reserve on a tube of a bobbin before a yarn package is wound includes a holder for a bobbin tube. A yarn transferring device delivers a yarn to the tube. A drive drives the tube while initially applying a piece of yarn on an end of the tube and leaving a free yarn end. A yarn guide lays the yarn on the tube and covers and fixes the piece of yarn in place with a small number of yarn windings of a yarn reserve. A yarn cutter trips a severing process by being fed toward the rotating tube and severs the free end of the yarn on the tube between the yarn reserve and the tube end.

Abstract: A transport vehicle transports a plurality of sliver cans between a can delivery station, work stations of a sliver processing textile machine, and a discharge station for empty cans along a given travel direction. The vehicle includes an undercarriage with a plurality of can parking places for the sliver cans. A plurality of can exchange mechanisms are provided, one for each can parking place. Each exchange mechanism includes a carriage supporting a respective one of the sliver cans. The carriage is slidable on the under-carriage transversly to the travel direction of the transport vehicle. A motor slidingly drives each of the carriages on the undercarriage. A can manipulating device, which is operatively associated with each of the carriages, displaces the sliver cans, setting them down and receiving them on a respective one of the carriages.

Abstract: A rotor spinning machine has a plurality of simultaneously operated spinning stations each with a spinning rotor, an opening roller, a feed roller for delivering sliver to the opening roller, and a stepping motor connect directly to the feed roller for driving thereof. An actuating arrangement is provided for selectively actuating each stepping motor in a normal increment mode during spinning operation and in a microincrement mode during yarn piecing operations.