Abstract: A method and apparatus for exchanging exhausted roving bobbins for full packaged roving bobbins applied to a conventional ring spinning frame provided with at least one roving supply rail arranged at a position in front of the spinning frame, at each side thereof, wherein a unit operation for exchanging exhausted roving bobbins suspended by front and back bobbin hangers, facing each other on a creel, for full packaged roving bobbins previously carried to the predetermined supply positions thereof on this supply rail, is carried out stepwisely from one side to the other side of the spinning frame along the creel, with regard to each pair of front and back bobbin hangers on the creel to which such a unit operation is to be applied, by utilizing only two pegs for temporarily supporting roving bobbins capable of changing the axial distance thereof between an axial distance (b) between the front and back bobbin hangers, facing each other on the creel, and an axial distance (a) between two adjacent bobbin hangers o

Abstract: A spinning frame control system in which a spinning frame is connected with a winder by means of a bobbin conveyance path and an empty bobbin return path. Identification marks in the form of concentric circles are fixed onto conveyance mediums for conveying spinning bobbins each independently, and readers for the identification mark are disposed in the bobbin feed position from the spinning frame to the conveyance mediums and also in the return path of bobbins discharged from the winder.

Abstract: In the case of a process and an apparatus for the automatic exchange of yarn packages and spool cores at a spinning unit of a machine having a plurality of spinning units which each spin two prestrengthened yarns and wind them as a double yarn onto a spool core, it is provided that the winding-up is interrupted for the exchange of the yarn packages and spool cores, the full package is replaced by a spool core having a starter winding with a starter yarn, and in that the double yarn coming from the devices for the spinning and the starter yarn are placed in a splicing arrangement and are spliced together with one another, after which the winding-up is restarted.

Abstract: In the process and apparatus for loading a ring spinning machine with roving-supply bobbins at least two bobbins rows extending longitudinally on each side of the spinning machine supply roving to the work stations and a auxiliary bobbin row which can travel in with full bobbons and out with empty bobbins are provided. According to our invention an exchange process is provided comprising replacing the roving of the bobbins in one of the bobbins rows supplying the roving which is being consumed by the roving of the auxiliary bobbin row which has been brought in with full bobbins. Thus the auxiliary bobbin row becomes one of the bobbin rows dispensing the roving while the bobbin row being replaced now becomes the auxiliary bobbin row with empty bobbins and is taken away. A new auxiliary bobbin row with full bobbins is then brought in. The exchange process is repeated for each of the bobbin rows as the roving is exhausted. A simple space saving apparatus for performing this process is described.

Abstract: A system for controlling the displacement motion of a carriage working machine which is capable of displacing along a track arranged along ends of spinning machines installed in parallel as a group, wherein an automatic apparatus for carrying out a certain part of the process by these spinning machines is rigidly or detachably mounted on a carriage. In this system, when a spinning machine outputs a forecast signal to call the working machine, the forecast signal is registered in a registration table. After the working machine has arrived at a position on the track adjacent to the particular spinning machine, and it is confirmed that the particular spinning machine can accept the operation of the automatic apparatus of the working machine, then the automatic apparatus starts to carry out its operation.

Abstract: The apparatus is intended for automatically supplying continuous spinning machines (ring) with reeled material, in which the reels must be supported at a position above the work groups and hung downwards, and comprises in combination: in correspondence of the work groups, transfer and overturn units to move the reels-supporting mandrels upwards in order to receive the reels and downwards to arrange the reels mounted thereon in a supply attitude; a transfer or conveyor system for periodically bringing a transfer or conveyor carriage into positions corresponding to those of the mandrels for the replacement of the reels; and means for transferring the reels from the carriage to the upwardly turned mandrels.

Abstract: A bobbin transfer system of a spinning frame (1), in which a series of trays (13) are carried on a pair of carrier rails (14, 15) driven to repeat a back-and-forth reciprocation. Hooking members (23) are arranged along the carrier rails (14, 15), which allow the trays (13) to pass thereover during the forward displacement of the carrier rail (14, 15) but inhibit the backward displacement of the trays (13) by the action of hooks (23a) formed on the hooking member (23) at a distance from each other corresponding to N times the spindle pitch wherein N satisfies the equation .DELTA.A.gtoreq..DELTA.D.times.N (wherein .DELTA.D stands for a manufacturing tolerance of a diameter of the tray 13 and .DELTA.A stands for an allowance for a grip distance of a bobbin catcher in an auto-doffer) and p stands for a spindle pitch. Accordingly, the trays (13) are transferred intermittently as the carrier rails (14, 15) reciprocate at a stroke larger than the spindle pitch.

Abstract: A method and apparatus for piecing rovings introduced from almost exhausted roving bobbins suspended by two rows of bobbin hangers mounted on a creel of a conventional ring spinning frame provided with a roving bobbin supply rail disposed in front of the creel, with rovings introduced from full packaged roving bobbins previously carried to the respective supply positions of the supply rail, said for exchanging the almost exhausted roving bobbins for the full packaged roving bobbins. A piecing rovings operation is carried out for each pair of almost exhausted roving bobbins suspended by a front row bobbin hanger and a back row bobbin hanger of the creel, facing each other, together with two corresponding adjacent full packaged roving bobbins of the supply rail, respectively.

Abstract: A spinning winder in which a spinning frame and an automatic winder are integrally associated. The spinning winder provides carrier routes comprising routes for transporting a spinning bobbin from the spinning frame to the automatic winder and routes for returning an empty bobbin discharged from the automatic winder to the spinning frame and also provides a passage for an operator between the spinning frame and the automatic winder.

Abstract: A positioning mechanism for a traveling automatic maintenance unit for a textile ring spinning machine or the like, which unit includes a carriage movable on spaced tracks along the spinning stations of the machine for automatically stopping at spinning stations that are determined to require maintenance. The mechanism includes a frame that is transversely pivotally mounted on the carriage on a longitudinally extending shaft. The frame carries an automatically operable maintenance mechanism that pivots with the frame transversely into operating position at a spinning station. Transverse movement of the frame is accomplished by a pneumatic piston-cylinder mechanism that manipulates a sliding element on a transversely extending rod of a slide guide with the frame connected to the sliding element by a connecting linkage.

Abstract: The process for replacing an empty roving bobbin with a full roving bobbin in a spinning machine, particularly in a ring spinning machine, in a dispensing position by an automatic roving bobbin changing device comprises taking the full roving bobbin from a storage location and putting the full roving bobbin in place of the empty roving bobbin. The full roving bobbin associated with the dispensing position is taken from one of a plurality of stand-by positions in the storage location. To provide a more automatic operation the process further comprises testing whether the full roving bobbin is present in one of the stand-by positions adjacent the dispensing position before beginning the exchange and when the absence of the full roving bobbin is indicated inducing a relative motion between the roving bobbin changing device and the stand-by positions until the roving bobbin changing device stands adjacent to one of the stand-by positions having a full roving bobbin.

Abstract: The apparatus for making textile fiber strands has a principal drive unit and at least one auxiliary drive unit. At least one alternating current motor of the principal drive unit is provided with a supply current of an adjustable frequency by a frequency converter. The frequency converter or at least one of the frequency converters is connectable to at least one alternating current motor of at least one of the auxiliary drive units in an intermediate time interval in which the receiving members of the apparatus for the fiber strands being produced are not loaded with the fiber strands.

Abstract: A spinning winder in which a spinning frame and an automatic winder are integrally associated. The spinning winder provides carrier routes comprising routes for transporting a spinning bobbin from the spinning frame to the automatic winder and routes for returning an empty bobbin discharged from the automatic winder to the spinning frame and also provides a passage for an operator between the spinning frame and the automatic winder.

Abstract: The process for positioning a series of suspended roving bobbin carriages equipped with a plurality of roving bobbins running on at least one rail opposite a plurality of working positions of a yarn manufacturing spinning machine comprises automatically guiding a positively actuated suspended roving bobbin carriage to a predetermined position opposite the working positions and stopping it in that predetermined position during delivery of the roving bobbins. The apparatus for performing this process includes a plurality of positioning elements working together pairwise of which a movable one is movable for positioning the suspended carriage, a carriage mounted one is positioned on one of the roving bobbin carriages and a fixed one is fixed on the stationary part of the spinning machine.

Abstract: A station (24) is connected to the spinning units (4.sub.1 to 4.sub.n) along a spinning machine (2.sub.1 to 2.sub.3) via floor-conveyor installation (20). The floor-conveyor truck (22) has three arms (46, 48, 50) extendable transversally to the direction of movement, wherefrom the first is built to receive and set in place a full can (V), the second to receive and depose an empty can (L). The third arm (50) serves for the displacement of the cans(E) in use. The spinning units (4.sub.1 to 4.sub.8 to 4.sub.n) are equipped with transmitters (42.sub.1 to 42.sub.8 to 42.sub.n) through which the floor-conveyor truck (22) are set in motion starting from the station (24). The floor-conveyor truck (22) is provided with a first control unit (28) for an automatic running and with a second control unit (30) for the automatic receiving and placement of cans.

Abstract: An arrangement for supplying bobbins to at least one tender which is situated at one of two loading stations that are disposed at opposite sides of an elongated textile machine from one another comprises a feeding chute which extends from a transfer location at a downward inclination to a distribution location, at which a diverting device is arranged and is operated to selectively divert the bobbins arriving at the distribution location into one or the other of two paths which lead from the distribution location to respective loading stations, depending on the presence of the tender to be loaded with the bobbins at the respective loading station.

Abstract: A device for keeping a constant number of bobbin tubes in circulation between at least one spinning machine and at least one winding machine includes a device for circulating bobbin tubes between at least one spinning machine and at least one winding machine, a sorting device for sorting out partially wound bobbin tubes from the circulating device, and a tube input apparatus operatively connected to the sorting device including a tube magazine for introducing empty bobbin tubes into the circulating device in proportion to the number of partially wound bobbin tubes sorted out.

Abstract: A spinning and spooling apparatus includes a spinning frame which has two sides each associated with a magazine for tubes which are conveyed through the spinning frame to provide respective spinning cops which are forwarded to an associated spooler. The spooler discharges the empty tubes which are then returned to the magazines by a feedback unit. The feedback unit includes a conveyor running from the spooler to the magazines and a controllable distributing guide which selectively provides a connection between the conveyor and one of the magazines.

Abstract: A system comprising spinning-bobbin feeding lines and empty-bobbin feeding lines connecting spinning frames with winders is provided, in which the feeding lines are provided in a feeding groove provided below a floor surface on which the machine bases are disposed, and the spinning-bobbin feeding lines are separate from the empty-bobbin feeding lines only in the vertical direction.

Abstract: An empty bobbin transporting system for a fine spinning winder wherein a spinning frame and a winder are interconnected by way of a spinning bobbin transporting path and an empty bobbin transporting path. An additional transporting path for transporting an empty bobbin fed back from the winder and an empty bobbin stock device for temporarily stocking the empty bobbin transported by the additional transporting path are provided in the spinning frame.

Abstract: An apparatus for transporting a bobbin between a winder and spinning frame. A curved transporting path is provided contiguously between a vertical transporting path and a horizontal transporting path, and a conveyor belt is disposed to extend along these paths. A cover which covers the bobbin transporting paths along a length thereof is provided.

Abstract: An installation includes a spinning machine, a winding machine, a bobbin transporting device transporting the bobbins from the spinning machine to the winding machine, and a tube or sleeve transporting device transporting tubes or sleeves from the winding machine to the spinning machine providing a circulation of wound and unwound tubes or sleeves, the bobbin transporting device including at least one automatic yarn steaming device.

Abstract: A bobbin transporting system in which a winder area and a spinning frame area having a plurality of spinning frames are connected to each other by means of a spinning bobbin transporting line and an empty bobbin transporting line. Transport bands for spinning bobbins are located along opposite sides of the spinning frame and are circulated in integral relationship so that spinning bobbins are delivered at the same time from the transport bands to the spinning bobbin transporting line and supplied to the winder.

Abstract: A travelling service device of a yarn processing machine is equipped with a bobbin magazine for receiving a multitude of sticks of conical bobbin tubes which are telescopically nested within one another. The magazine includes a conveyor belt which extends along and can be moved in an endless path and which carries a multitude of bounding elements which bound respective compartments, each for receiving one of the sticks for movement with the belt. At a predetermined location of the endless path, there is provided an arrangement for removing the respective stick from the associated compartment, and for transferring such stick to an arrangement for separating the individual tubes from the stick for subsequent feeding to the respective station of the machine. The compartments may be arranged so that their axes extend normal to the trajectory of movement of the travelling service device, in whic case the removing arrangement includes an arrangement for turning te stick through 90.degree.

Abstract: A process for replacing spent roving packages with new roving packages, with automatic splicing and reattachment of the rovings, on machines to spin carded wool is disclosed. The new roving package is removed from a conveyor and brought to a waiting position, where the end of the new roving is manually placed in a gripper. When the old roving package is almost exhausted, the spindle of the spinning machine is stopped and the roving is sheared. The end of the roving still attached to the spinning machine is retained with an aspirator. The new roving package is then brought to the working position, causing the automatic discharge of the spent roving package, and the gripper brings the new roving to the aspiration site causing the intermingling of the fibers of the two rovings. The spindles are restarted and the spliced segments of the roving receives a false twist and subsequent real twists.

Abstract: A spinning system has a spinning apparatus having a longitudinal succession of spinning stations, a creel extending longitudinally above the apparatus and having respective pendant hangers above the stations and each capable of holding a respective yarn package, and a respective slide above each station supporting the respective hanger slidable between an inner position directly above the respective station and an outer position above but horizontally offset therefrom. A reloading apparatus is displaceable longitudinally along the apparatus at least generally under the hangers in the outer positions of the respective slides. A magazine holds a supply of fresh roving packages on the reloading apparatus and a device is provided on the reloading apparatus for displacing the slide between the inner and outer positions. A grab on the reloading apparatus can grab the package on the hanger in the outer position of the respective slide.

Abstract: A doffing method in a spinning frame or the like comprises steps of holding a spinning bobbin after completion of winding with a holding member, removing the spinning bobbin from a spindle without bunch winds, fitting the spinning bobbin onto a bobbin conveying medium having an air path, cutting the yarn and sucking air within the spinning bobbin through the air path of the bobbin conveying medium to attract an end of the yarn adjacent the spinning bobbin into the spinning bobbin under the guidance of the holding member.

Abstract: The apparatus is associated with a spinning or twisting machine and removes individual textile bobbin tubes from a reservoir, such as a container which contains such bobbin tubes. The container has in its lower portion a funnel-shaped structure through which the bobbin tubes move downwardly towards an opening. As is known, there is the danger that the bobbin tubes undesirably form "bridges" and thereby the further delivery of such bobbin tubes is interrupted. Such bridge formation is avoided by providing a break-up rod or bar which is arranged substantially horizontally and parallel to the broad sides of the container, in the interior and in the region above an opening of the container. The break-up rod or bar is supported in the longitudinal sides of the container with play on all sides and in a freely rotatable manner. The thickness of the break-up rod or bar and the thickness of the bobbin tubes are of the same order of magnitude.

Abstract: During the cop-forming phase of operation of a ring spinning or twisting machine, yarn is wound onto spools carried by the spindles in order to form cops. At the end of this phase, the yarn associated with each spindle is fastened below the spool by means of several fastening turns; thereafter, the full cops are removed with breakage of the yarns. In order to facilitate the operation of cop-removal means for automatically and simultaneously removing all of the full cops, yarn-severing means are provided that sever the yarns prior to the cop-removal means picking up the full cops. In a preferred embodiment, the yarn-separation means is arranged to snap the yarns by downwardly displacing the members around which the fastening turns are wound.

Abstract: A device for discriminating and distributing the bobbins, which are discharged from a textile machine such as an automatic winder, in accordance with the quantity of yarns wound on the bobbin and/or the kinds thereof. The device includes sensors, a bobbin chucking means made movable which chucking the bobbin to distribute the bobbin, and guide means for guiding the movement of the chucking means operated in accordance with the instruction of the sensors.

Abstract: A cop and bobbin conveying system including a cop feeding lines and bobbin ejecting lines which are interconnecting fine spinning frames and a winder. The cops and bobbins are conveyed by carrier members on which they are fitted and carried. A bobbin supplying device for supplying a bobbin on an empty carrier member is provided at the intermediate portion of the bobbin ejecting line.

Abstract: A stationary service unit at one end of an elongate spinning machine coacts with a supply carriage delivering bobbins wound with rovings from a flyer at a preparatory stage and loads these bobbins onto depending grippers which are movable, manually or automatically, on an overhead guide rack. The rack may form an endless loop about the machine bed or may be divided into two parallel sections flanking same; in the latter instance the service unit may be swingable about a vertical axis toward one or the other section.

Abstract: Bobbins wound with rovings from a preparatory stage are loaded onto a carriage which receives them on an orthogonal array of horizontal pegs and transports them to a holding station for transfer, one column at a time, to a service unit moving continuously or intermittently past a multiplicity of working positions of a ring spinning machine whose spindles draw the roving from bobbins on a supply rack. The service unit, whose primary function may be that of a yarn-tying device or a traveling air blower, has a vertical conveyor with stems alignable with the pegs of the carriage in the holding station for picking up the bobbins to be transferred and delivering them, individually, to storage areas at or near the supply rack where fresh bobbins are needed as determined by a sensor aboard that unit. The storage areas may have overhead grippers onto which a bobbin is pushed from an erected stem at the upper vertex of the vertical conveyor.

Abstract: A spinning and winding plant includes at least one ring spinning machine, at least one winding machine, at least one first spool conveyor and at least one first tube sleeve conveyor disposed at the ring spinning machine, at least one second spool conveyor and at least one second tube sleeve conveyor disposed at the winding machine, at least one spool transfer station disposed between the first and second spool conveyors, at least one tube sleeve transfer station disposed between the first and second tube sleeve conveyors, a spool storage device with a predetermined number of storage locations at the spool transfer station, a device for emptying the spool storage device in sequence with the requirement for spools at the winding machine, a device for filling a given maximum number of the storage locations with spools supplied by the ring spinning machine, and a device for filling a minimum number of the storage locations with at least partly filled spools ejected and returned from the winding machine.

Abstract: An automatic doffing device for ring spinning and/or twisting frames, in particular in machines for producing large packages, which comprises a conveyor arranged to convey the empty tubes into a vertical position corresponding with each of the spindles of the spinning and/or twisting frame, a second conveyor arranged to take away the full cops, and a gripper assembly arranged to effect the mutual transfer of the full cops and empty tubes between the conveyor supporters and the spindles.The doubling of the conveyors and their location at the top of the spinning frame creel in a position overlying the spindles enables automatic doffing to be carried out on spinning and/or twisting frames without any regard for the size of the package (cop diameter and tube length).

Abstract: In a widely-used type of ring, spinning or twisting machine, each spindle of the machine is provided at its upper end with a spinning head. This head is engaged by yarn to be wound onto a cop spool carried on the spindle, the yarn passing from the spinning head to the ring traveller associated with that spindle. Due to the engagement of the yarn with the spinning head it is generally not possible to employ known types of automatic cop removal device with such machines. To overcome this problem, cop-raising means are provided which, at the end of each cop-forming process and prior to operation of the cop-removal device, serve to raise the cop spools above the level of the upper ends of the spinning heads whereby to disengage the yarns therefrom. The cop-raising means comprise, for example, a mechanism arranged to displace upwardly the so-called ring nuts associated with each spindle.

Abstract: The spinning frame of the invention comprises a passage through which empty bobbins returned by conveyor means provided above the spinning frame are guided towards empty bobbin supply sections associated with automatic bobbin changer annexed to the spinning frame. Halfway in the guide passage are a branch point for branching the guide passage into left and right side sections and a distributer for distributing empty bobbins. Below said branch point and halfway in the left and right side sections are storage sections for storing the empty bobbins in horizontal position.

Abstract: An apparatus for controlling production in a spinning machine is disclosed herein. Sliver consumption quantity at each of the spinning stations is computed from the count of pulse signals generated in synchronism with the rotation of a drive shaft, e.g., of a winding drum, and from the count of those pulse signals generated in the same way but during yarn piecing or doffing operations when no spun yarn is wound. When a reference value of preset data is reached by the computed sliver consumption quantity with respect to any spinning station, a device is operated to give an alarm signaling the need for sliver can replacement with a full one at that station.

Abstract: An apparatus for sliver can controlling in a spinning mill having a plurality of spinning machines each comprising a plurality of spinning stations. The apparatus includes various lines of sliver can transporting tracks through which a full sliver can may be brought to a position adjacent to any of the spinning stations, as required. Sliver consumption quantities at the respective stations are computed by a control circuit as a central processing unit. When the sliver consumption at any one of the spinning stations reaches a predetermined quantity at which its sliver can is nearly empty, the control circuit operates to energize a warning means and means for indicating the number designating such spinning station calling for sliver can replacement.

Abstract: On textile machines, on which packages are wound with a set or reference yarn length, the changing of these packages by means of a travelling package changing device should be carried out in such time optimized manner that the largest possible number of winding positions can be serviced by the package changing device. For this purpose, the yarn length of packages to be wound is signalled continuously to a computer by means of yarn length measuring units and the location of a package changer is continuously signalled to the computer by means of positioning units. If certain packages reach a remainder or residual yarn length before reaching the set yarn length, then the wind-up times for the remainder yarn length of these packages are compared by the computer with the respective travelling times of a package changer to these packages and registered in an optimization procedure, for example for three of these packages.

Abstract: A transport system for transporting laps wound on tubes in spinning preparation. The laps are transported above head height by carriers or supports movable along transport rails and are raised and lowered by means of carrier rails. The transport rails and the carrier rails are components or parts of a closed, endless circulation path or track. Each carrier has a holder for the lap and a holder for the empty tube. The invention provides the advantages that no special transport system is required for return of the tubes. Moreover, transport of individual laps or of a group of such laps is possible and an ordered and simple circulation path is provided during transport of these elements or parts. Furthermore, the system can readily be automated.

Abstract: A device for mounting or donning of bobbins onto a transport band of a textile machine, especially a ring spinning or ring twisting machine contemplates that incorrectly mounted bobbins are ejected or doffed by a bar member pivotable about a pivot axis or shaft. To eject or doff such incorrectly mounted bobbins the bar member is moved, at a monitoring or control position, in a downward direction towards the head of the bobbin currently there located and ejects incompletely mounted bobbins. The donning device exhibits simplicity and a reliable mode of operation. Furthermore, by means of the invention damage produced by incorrectly mounted bobbins is avoided and damaged bobbins are removed from the operating process.

Abstract: A method and system for facilitating a continuous and automated taking-off of yarn from yarn packages. A creel module having one or a plurality of yarn package receiving creel pins disposed in one or more rows is automatically loaded with yarn packages at a loading position. The loaded module is conveyed, optionally through a buffer storage system, to operative association with a stationary creel frame. The module is transferred from the conveying mechanism to the creel frame, and is mounted with respect to the creel frame so that the yarn may be taken off the packages thereof. After the yarn from the module packages has been exhausted, the module is removed from the creel frame and conveyed back to the loading position, while it is replaced with another, loaded, module.

Abstract: An apparatus for locating a servicing device which travels along a parent textile machine, such as a spinning frame, having a plurality of stations and stops at any designated station of the parent machine to there perform a servicing operation, such as yarn piecing or cleaning by use of fluid, such as compressed air or vacuum, supplied from a fluid source provided separately from the servicing device. The apparatus comprises, on each station of the parent machine, a stationary connector communicating with the fluid source and a locating guide member having a locating guide groove therein, and, on the servicing device, an air cylinder, a locating rod actuated by the cylinder toward and away from the locating guide member and engageable with the guide groove and a communicating member movable together with the locating rod and engageable with the stationary connector.

Abstract: A method and apparatus for supplying operational fluid to a traveling-type working machine, such as a yarn piecer or an auto-doffer, which serves a parent machine, such as a spinning frame. The working machine utilized in the present invention has a secondary fluid tank and at least one nozzle attached to an air cylinder. Prior to the working machine serving the parent machine, the nozzle is advanced by an air cylinder, operated by fluid supplied from the secondary fluid tank, so that it engages with one of the air intakes provided on the parent machine. Then operational fluid is introduced from a primary fluid source into the working machine through the engaged nozzle and air intake, and thereby the working machine carries out a specific operation for the parent machine. Simultaneously, the operational fluid is distributed to the secondary fluid tank in preparation for the next engagement of the nozzle and the air intake.

Abstract: A method and apparatus for switching the relative position between roving bobbins held by bobbin hangers of a front row and the roving bobbins held by the rear row in a spinning frame. The roving bobbin exchange operation is carried out as successive unit operations from one end-side of the spinning frame to the other end-side thereof. In each unit operation, first the axial distance between a bobbin hanger of the front row and a bobbin hanger of the rear row, which are positioned adjacently in the lengthwise direction of the spinning frame, is reduced to a predetermined distance, then the relative position of those two bobbin hangers is reversely changed while maintaining the reduced axial distance. Thereafter, the axial distance between those two bobbin hangers is returned to the initial condition for carrying out the spinning operation.

Abstract: The invention relates to a device for conveying cops and winding tubes at one and the same time between a spinning frame and the relative winding heads which comprises a powered closed-ring conveyor means revolving in a substantially horizontal plane along each side of the spinning frame between one end of the spinning frame and the point of delivery of the cops to the winding heads pre-disposed downstream from the spinning frame, a plurality of pins carrying the cops or tubes and anchored to a conveyor, guides for the pins and a loading/unloading station where the tubes are loaded and the cops are doffed from the spindles of the spinning frame. The cops are conveyed on one side of the closed-ring conveyor, whereas the tubes to be fitted to the spindles of the spinning frame are conveyed advantageously on the other side of the conveyor.

Abstract: The invention concerns a spinning preparatory machine with suspended pivotable flyers arranged in at least one row. The flyers are supported in a frame composed of a longitudinal beam and two arms and arranged at right angles thereto, which frame is pivotable about a pivoting axis between an operating position and a doffing position. A pivoting and loading system is connected with the frame in such a manner that the frame is locked in its operating position.The spinning preparatory machine according to the invention shows, among others, the advantage of an accurate positioning of the pivotable flyers in a locked operating position, high operational reliability and affords safety against accidents from occurring.

Abstract: A bobbin exchange apparatus on a ring spinning or a ring twisting machine contains a transporting belt extending substantially horizontally in the longitudinal direction of the machine. The transporting belt is provided with bobbin holders and, viewed relative to the machine, is inclined downward towards the front. According to the invention, there are provided supporting means extending in the longitudinal direction of the machine. These supporting means are contacted by the front side of the empty bobbin tubes placed onto the transporting belt. The invention permits a considerable space saving to be achieved in such a manner that, in comparison to known machines, more space is available for the spindle bearings or bolsters and there can be used a spindle rail which fulfils the requirements of sufficient stability. Furthermore, the invention allows an improved spinning geometry to be chosen.

Abstract: An apparatus for detecting an erroneously inserted empty bobbin is disposed on a spinning frame which is provided with an automatic doffing and donning apparatus and a conveyor having empty bobbin supporting pegs mounted thereon. The detecting apparatus photoelectrically or electromechanically detects whether or not an empty bobbin is correctly inserted onto the corresponding empty bobbin supporting peg based on the fact that an incorrectly inserted bobbin inclines backwards and projects upwards. When the incorrectly inserted bobbin is detected, an alarm is actuated in order to notify an operator in charge of the spinning frame of the same.