Abstract: A method of maintaining the location of a fiber doff inner-diameter-tow at a point of payout within a constant inertial reference frame includes providing a flat fiber tow payout system with a center-pull doff of flat fiber tow that pays out at a point of payout along an inner diameter of the center-pull doff with rotation of the center-pull doff about a vertically oriented axis of rotation, the flat fiber tow payout system including a constant inertial reference frame for payout of the flat fiber tow along the inner diameter of the center-pull doff without twisting the flat fiber tow; and accelerating and stopping rotation of the center-pull doff with the flat fiber tow payout system so as to maintain payout of the flat fiber tow along the inner diameter of the center-pull doff in the constant inertial reference frame, preventing twisting of the flat fiber tow.

Abstract: A procedure is described in which an open-end rotor spinning machine already in operation can be modernized by means of re-equipping it with new parts. This machine comprises device means for interrupting the spinning process at a spinning station for the purpose of a doffing operation. The machine comprises a doffing arrangement which is movable relative to the spinning stations, which doffing arrangement comprises devices for exchanging a full bobbin for an empty yarn-winding tube. The machine comprises further at least one piecing arrangement movable in relation to the spinning stations, which is designed to restart spinning at the spinning station with a starting winding already connected to the yarn-winding tube. It is an object of the modernization that the piecing arrangement is replaced with a new piecing arrangement, which is designed to restart spinning with a starting yarn which is not connected to the yarn-winding tube, and subsequently to attach a newly spun yarn to the yarn-winding tube.

Abstract: A method of finishing a reel of wound yarn with a tail end of yarn hanging from the reel can prevent the tail end from becoming caught up and thus unwinding considerable lengths of yarn from the reel and comprises the steps of unwinding a predetermined length of yarn including the tail end, folding the length forming an eye by means of a connection of distinct points on the predetermined length of yarn adjacent the cylindrical surface of the reel, rotating the reel to form at least one rewound turn of yarn including the first connection of points and connecting the eye projecting from the rewound turn to a point of the predetermined length of yarn which is not rewound so as to form a second connection.

Abstract: When an open-end rotor spinning device is stopped, a short yarn end is produced. For this, and in synchronization with the interruption of fiber feeding to the opener device (116), the fibers which continue to be combed out of the leading end of the fiber sliver (2), as well as the fibers still present in the clothing of the opener device (116), are prevented from continuing to accumulate on the fiber collection surface (136) of the spinning rotor (13). To carry out this process, the device (115) for the stoppage of the fiber feeding device (110) is connected to a control device (3) by means of which a device (134, 135, 172, 173) for the shortening of the yarn end can be switched on temporarily as the spinning device (11) is stopped.

Abstract: A servicing apparatus for automatic repair of yarn breaks in open-end spinning machines is provided with a device for replacing finished yarn packages with empty tubes, and a multi-functional yarn manipulating element having a work head equipped with a yarn brake and a contoured yarn guide element, the manipulating element being selectively movable between a position (c) at a top end of the tube for forming a top winding at the completion of winding a full yarn package, a position (a) at a base end of the tube for forming a yarn reserve winding upon beginning the winding of an empty tube, and a position (b) moving axially along the tube to prevent the creation of parallel windings during the repair of a yarn break.

Abstract: Provided for a spinning machine, a roving bobbin changing apparatus which includes a roving end finding/pick-up section equipped with a roving end finding/pick-up mechanism at a leading side as viewed in a direction in which the roving bobbin changing apparatus is moved for roving bobbin exchange, and a roving tying/bobbin exchange section equipped with a roving bobbin exchanging means at a trailing side. The roving tying device is so disposed as to be movable between the roving end finding/pick-up section and the roving tying/bobbin exchange section. The roving tying device can be moved by a belt to a new roving grasping position in the roving end finding/pick-up section and a roving tying position corresponding to that of a full roving bobbin transfer means in the roving tying/bobbin exchange section.

Abstract: A cans exchanging system whereby, out of cans arranged in plural rows in the longitudinal direction of a spinning frame, plural empty cans arranged in the direction orthogonal to the longitudinal direction of the spinning frame are carried out from the rows of cans, and plural full-loaded cans are carried in simultaneously to the carried-out position of the empty cans. A sliver piecing device for piecing together slivers, from sliver feeding cans to a spinning machine and slivers from full-loaded cans while carrying both cans on a cans exchanging carrier is mounted on the cans exchanging carrier.

Abstract: A sliver piecing unit 80 includes three sets of separable rollers 804 and 844, 806 and 846, and 808 and 848 for nipping a sliver S1 fed from a consumed can to a spinning machine. A throttling nozzle 870 is arranged between the second and third sets of rollers 806 and 846, and 808 and 848. The draft ratio between the first and second sets of rollers 804 and 844, and 806 and 846 can be varied between 1.0 and 2.0. A sliver feed unit 70 includes a separable first and second roller 702a and 702b for feeding a sliver S2 from a full can to the piecing unit 80 so that the slivers S1 and S2 are combined. The draft ratio between the first and second sets of rollers 804 and 844, and 806 and 846 is controlled to obtain combined slivers of a thickness corresponding to that of a single sliver. A nipping belt 884 and nipping roller 886 are provided at the outlet from the third set of the rollers 808 and 804 for obtaining a rubbing movement in the combined slivers.

Abstract: To secure the end of the roving (5) to packages (9) before their doffing from a roving frame, it is proposed to initially raise the package support carriage (2) into a position such that the lower end (4a) of the tubes (4) is at the level of the compressor (16) of the flyers (6), then rotate the packages (9) and flyers (6) through a few revolutions in order to wind and secure the roving (5) onto the lower end portion (4a) of the tubes (4), after which the carriage (2) is lowered to break the roving (5) in the section between the lower end (4a) of the tubes (4) and the flyers (6). Preferably, before lowering the packages (9), a reserve of roving (5) is created by slowly rotating the flyers (6) and packages (9) through a few revolutions, to simultaneously twist the roving (5) and strengthen it.

Abstract: The invention relates to a method of respinning-in in open-end spinning machines after a bobbin removal from the swinging arms (51, 52) of the bobbin holder (5) or at the beginning of spinning at an empty spinning station, and to a device for carrying out the method. During the fixing of the empty tube (8) between the swinging arms (51, 52) of the bobbin holder (5) at a spinning station at rest, an ancillary yarn (15) is inserted between a swinging arm (51) and the edge of the tube (8) and then gripped the swinging arm (51), then its opposite end is adapted for one spinning-in in an attending device (9) and spun-in, then is this ancillary yarn (15) together with the beginning of the newly spun yarn wound onto the tube (8) as yarn reserve, whereupon the yarn is handed over to the distributing mechanism of the machine for producing a cross-wound bobbin.

Abstract: An open-end spinning machine embodied as a yarn piecing unit for automatically repairing yarn breaks during bobbin winding and for replacing finished bobbins with empty tubes, and an auxiliary yarn transport arrangement for supplying and removing an auxiliary yarn used for the piecing operation. The auxiliary yarn transport arrangement has a yarn supply tube that can be positioned among various operating positions: (a) a first position wherein the auxiliary yarn is transferred to a yarn locating nozzle of the piecing unit; (b) a second operating position wherein the piecing cycle is initiated by spinning an end of the auxiliary yarn with individual fibers fed into the spinning rotor of the spinning machine; and (c) a third operating position wherein the auxiliary yarn and its pieced end is severed from the trailing length of newly spun yarn from the spinning rotor and the new yarn is applied to an empty tube in the winding creel of the spinning machine.

Abstract: A winder-to-double twister connecting system, which comprises a yarn end picking device for picking out a yarn end from a package set on a tray, a package lifter for inserting a two-piled empty bobbin mounting adapter received from an overhead conveyor, into the tray on a circulating conveyor line, and for transferring a two-piled package mounting adapter to the overhead conveyor; a bobbin mover for pulling off, from an adapter, an empty bobbin coming on the circulating conveyor line; a package loader for taking up the package with the yarn end picked out from the tray and mounting the package to the adapter; and a bobbin stripper for removing remaining yarn from the empty bobbin received from the bobbin mover.

Abstract: A process to test the monitoring function of an electronic sensor at the work station of a textile machine in order to avoid wrong decisions by the control unit of the work station. The sensors are tested during operation. For a brief time span a second sensor of the same type is located at the same time within the operating range of the sensor of the working station so that its function overlaps in time with that of the sensor of the work station. During the time of overlap the logical levels of the two sensors are detected, compared with each other and classified as result of the test.

Abstract: In an open-end spinning machine, an empty tube is placed between the holder swinging arms of a bobbin holder of a spinning station at rest. An ancillary yarn is inserted and gripped at one end between one of the swinging arms and the edge of the tube. The opposite end of the ancillary yarn is adapted for spinning-in by cutting and shaping the opposite end which is in turn fed into a spinning unit. The ancillary yarn together with newly spun yarn is wound onto the tube through the spinning unit for making a yarn reserve. This yarn reserve is used by the open-end spinning machine for producing a cross-wound bobbin.

Abstract: A method of threading in a false twisting machine, capable of surely attracting the free end of a yarn by suction and of preventing the yarn from slacking during a threading operation. A traveling doffer travels along a false twisting machine which oils yarn with oiling rollers and takes up the oiled yarns in yarn packages. During the doffing operation, the free end of the yarn extending on the delivery side of the oiling roller is sucked, while the yarn is separated from the oiling roller.

Abstract: There is described an automatic device for restarting a two-for-one twisting station after yarn interruption, the device being provided on a carriage which patrols the twisting machine faces and is equipped to discharge a completed bobbin, seize the yarn ends from the feed side and the bobbin side and convey them to a joining device, join said ends, pick up a new tube and position it on the bobbin carrier arm, bring the yarn ends on the feed side up to it and restart the station, so restoring the yarn flow.

Abstract: For the strengthening of an end portion of a yarn which extends on a spinning station of a spinning machine between a stopped spool package and a suction withdrawal device assigned to the spinning station, the yarn which projects into the withdrawal device is gripped, is lengthened by the winding-off of the yarn wound onto the spool package, and is then strengthened in an essentially stationary position by means of a twisting entered in the area of the yarn end. In the case of an arrangement provided for this purpose, particularly mechanically operating twisting devices are used.

Abstract: A method and apparatus for disposing an end of roving of a roving bobbin at a disposing location adjacent the drafting device of a spinning station of a textile spinning machine The roving end disposing apparatus, which is preferably mounted on a traveling service unit which travels to the spinning stations of the textile spinning machine to perform roving feed start operations thereat in which the feed of roving from a roving bobbin through a drafting device is started, includes a roving end support assembly for supporting a roving end for movement between a receipt location at which the assembly receives the roving end and the disposing location adjacent the drafting device at which the supported roving end is released either for engagement by the drafting device or piecing of the roving end with roving extending from another roving bobbin through the drafting device.

Abstract: For a changing of spool tubes and packages at an individual spinning unit of a spinning machine having a plurality of such spinning units, it is provided that, when a given filling ratio is reached, the yarn which continues to move to the spool package is disengaged from a cross-winding yarn guide and is subsequently, in the form of final windings, wound onto an area limited in longitudinal direction of the spool package onto the spool package.

Abstract: In a case of a spinning machine having a plurality of spinning positions and having a package spool changing arrangement or doffing arrangement which can be applied to the individual spinning positions, it is provided that the doffing arrangement comprises devices for the winding-off of the yarn wound onto a full X-package and for winding this yarn back onto a predetermined area of the X-package in parallel layers and/or layers disposed above one another.

Abstract: A method for starting an operation of a two-for-one twister after doffing. It includes steps of turning a spindle for a specific period of time before or while the yarn end from a feed yarn package side is held and wound on a paper tube by a suction pipe, rotating the paper tube and the spindle for bunch winding, and drawing the yarn up to the feed roller for general take-up operation.

Abstract: For an automated removal of a package and transport adapter with a hollow core, on which at least one empty winding tube or a winding tube holding a residual length of yarn is inserted, from a yarn processing station, in particular from the protective pot of a two-for-one twisting spindle, the present invention provides for an operating method and an apparatus, so as to obtain for a troublefree further transportation of the package and transport adapter a yarn length of a defined length from the yarn end extending to a not-fully unwound winding tube, which yarn length is inserted into the hollow shaft of the package or transport adapter.

Abstract: A spinning machine is disclosed which includes a plurality of spinning units which each spin two prestrengthened yarn components and guide them together to a double yarn. A movable servicing device is provided which can be applied to the individual spinning units and which, for feeding the double yarn to a spool tube inserted into a spinning unit wind-up device and driven to perform rotations, has a device that can be applied to the spool tube and is equipped with devices for the deflecting of a section of the double yarn into a direction extending approximately in parallel to the axis of the spool tube and for the transferring of the deflected section of the double yarn into the moving range of a driving device rotating together with the spool tube.

Abstract: A bobbin exchange apparatus for exchanging full bobbins for empty bobbins on a spinning machine. A bobbin exchange apparatus is mounted in a traveling service unit and includes a component for temporarily supporting a bobbin, a component for transferring a bobbin between and among the creel and the spare bobbin frame of the textile machine and the traveling service unit, and a component for displacing the end of the roving of a full bobbin temporarily supported on the temporary supporting device to an extending disposition ready for engagement for feeding to the drafting device of the textile machine. A suction applying device for applying the suction to engage the roving end is pivotally mounted to the temporary supporting component for pivoting about an axis parallel and offset from the axis of the temporarily supported full roving bobbin.

Abstract: A method for winding a fixed length of yarn on a yarn-supply package in an apparatus connecting an automatic winder or an innovation spinning machine having a winder with a two-for-one twister. The method comprises dividing a single yarn-supply package transferred from a winder side to form a plurality of twist-yarn packages on the two-for-one twister side.

Abstract: A method and apparatus for reestablishing the spinning operation of an open-end spinning machine following completion of spinning of a full package. The apparatus uses a traveling service unit having a device for forming a yarn reserve on a projecting end of a full package, a device for removing the full package with the yarn reserve thereon, a device for placing an empty tube in position for winding, a device for preparing an end of auxiliary yarn for restart feeding to the spinning element, a device for feeding the end of auxiliary yarn to the spinning element to restart spinning and withdrawing restarted yarn from the spinning element, and a device for engaging the restarted yarn on the empty tube to reestablish the spinning operation. The forming of the yarn reserve is performed while the end of auxiliary yarn is being prepared for restarting of spinning. The package is removed while the auxiliary yarn end is being fed to the spin box for restarting of spinning.

Abstract: A package feeding method and apparatus for a yarn twisting machine having a large number of two-for-one twisters of two stage yarn supply type. A package is fed after an end of yarn of the package has been wrapped in several turns of a yarn layer non-existing portion of the package.

Abstract: A method and apparatus for continuously removing waste yarn during doffing of a textile yarn processing machine is disclosed, which includes a mobile carriage which is adapted to move to a position adjacent a winding station to be doffed. The carriage mounts a waste yarn take-up spool, and yarn transfer means for moving the advancing yarn from the winding station to the take-up spool. After doffing the full package, the yarn transfer means moves the advancing yarn back to the empty bobbin, and the carriage is then free to move to the next winding station. The waste yarn wound on the take-up spool may be advantageously used for quality control measurements.

Abstract: Apparatus for automatic creeling in ring spinning frames, constituted by a frame capable of patrolling along a ring spinning frame, in inspection service to detect missing rovings, and is provided with an upwardly movable operative body and a supply of full roving packages to cover the needs and comprises also in combination:(a) structure for detecting missing roving;(b) creeling structure for releasing the exhausted bobbin or roving with broken strand;(c) structure for retaining the end of a new roving;(d) structure for gripping the new roving end and passing it around the spinning frame roving rods and delivering it to the drafting system; and(e) structure for replacing the roving sliver loading device.

Abstract: A bobbin changing apparatus is provided which is adapted for use in association with a textile yarn processing machine having a plurality of winding stations, and wherein the apparatus comprises a thread operating carriage and a separate doffing carriage, which are mounted for independent movement on a common trackway. The thread operating carriage acts to sever and withdraw the advancing yarn during the bobbin changing operation, and upon an empty bobbin being mounted at the winding station, to then deliver the yarn to the automatic thread-up mechanism on the winding head of the machine. The doffing carriage includes a mandrel for receiving the full bobbins, and since the doffing carriage is independent of the thread operating carriage, the doffing carriage is free to immediately move from the winding station to deliver the full bobbin to a separate creel, or to perform a quality control analysis of the full bobbin.

Abstract: Apparatus for accommodating changing of bobbins on open-end spinning machines. Spooling devices are provided for joining a thread reserve section and a starting winding to an empty spool tube which is to be inserted in place of a completed bobbin. The spooling devices are constructed to form a starting winding of sufficient length to form a plurality of one-time piecing operations at a spinning station. A spool transfer device is provided for transferring a prepared spool with starting winding and reserve thread section into a bobbin holder. In certain preferred embodiments the spooling device is carried on a movable unit which travels along the spinning stations and includes an auxiliary bobbin for supplying the reserve and starting winding thread section. In other preferred embodiments, the spooling device is provided separate from the movable unit along the spinning machine and includes apparatus for forming and storing a plurality of pre-prepared bobbins.