Abstract: The roving slubbing at the conclusion of winding of a roving bobbin in a flyer type machine is passed in a descending spiral around the cylindrical body bobbin and then onto the lower winding cone, after it is looped in an overwinding onto the winding tube below the lower winding cone. The winding then passes in a spiral upwardly and is formed into a short spiral segment which is drawn out by a traction on the roving so that the latter will break along the cylindrical body. The bobbin is stable and can easily be handled and transported directly and there is a reduced possibility for the slubbing to come loose, although it remains available to be pulled downwardly at the ring-spinning machine.

Abstract: An automatic spinning start-up flyer for a roving frame which has on a flyer arm a swingably-mounted pressing finger comprised of a pressing finger bar and a pressing finger arm with a pressing finger blade. The pressing finger assembly is mounted on a pivot axis at the centrum of the connection of the pressing finger with the flyer arm and is rotated about the bobbin center. The pressing finger rod lies outside the radius along which the pressing finger arm with pressing finger blade are arranged and the pressing finger bar is actuatable by an actuating element effective transverse to the pivot axis upon the pressing finger bar to swing the pressing finger into its outwardly-swung position. With the flyer, a wide opening of the pressing finger can be effected automatically for automatic bobbin change without a loading of the pressing finger against the sleeve or bobbin.

Abstract: A process for bobbin replacement on a flyer frame provided with a drafting frame, flyers, spindles and a bobbin rail, in which, while the flyer frame is running, a sliver end for each sliver supplied by the drafting frame is placed upon an empty bobbin sleeve. Initially only the flyers and the spindles of the flyer are driven. The flyers and the spindles are either immediately advanced in a forward direction or are initially driven backwards and after the lapse of a predetermined time period, brought to standstill and then driven forwardly, whereby the standstill of the flyers and the spindles coincide in time or are offset in time. After the start of the forward drive of the flyers and the spindles, the time-delayed drafting frame is set into operation.

Abstract: Roving bobbins of a weight of about 5 kg, by contrast to standard bobbins with weights up to 3 kg, can be used in a spinning system in which the flyer frames are of the multi-axial drive type and are equipped with an automatic bobbin change mechanism which transfers the full bobbins to suspension carriage trains displaced thereby to ring-spinning machines and wherein the suspension carriage trains pass into the creels of the ring-spinning frames directly or are transferred from such suspension carriage trains to the creels.

Abstract: A roving frame has a flyer region into which the suspension carriage trains are moved past a device for monitoring the presence or absence of cores or bobbins on the hangers. An error signal is transmitted in the case of an error and correction is effected when the suspension carriage train is in the flyer region. The suspension carriage train is then moved back past the sensors and either on this backward movement or the next forward movement, the functional correctness or poor mounting is again measured. Correction is effected in each case in the flyer region where the hangers are more readily accessible.

Abstract: In order to quickly exchange empty sleeves (18) for full bobbins (6)in a roving frame, guiding rails (14, 21, 22) are mounted along at least one row of flyers (4). A suspended carriage train (15) with hangers (16) can be driven on the guiding rails (14, 21, 22). By lifting and lowering the bobbin rail (5), the bobbins (6) can be transferred from the bobbin rail (5) to the hangers (16) of the suspended carriage train (15) and sleeves (18) can be moved from the hangers to the bobbin rail. The bobbin rail (5) and/or the guiding rails (14, 21, 22) can be moved back and forth. Fixed guiding rails (14) can rest on the bottom side of the flyer rail (3), and movable guiding rails (21, 22) are arranged in the area below the flyers (4). Such guiding rails may be designed to slide or swivel.

Abstract: A roving frame has a drafting frame receiving sliver and feeding rovings to respective roving winding stations. Respective spindles at these stations receive core sleeves on which the roving bobbins are wound for respective flyers. An evaluating and control device is operatively connected to the drive for automatically or on command, operating the flyers at a first gentle speed less than the operating speed and a speed required for automatic capture of roving ends by the core sleeves, automatically or on command, operating the flyers at a second gentle speed less than the operating speed, greater than the first gentle speed and sufficient for automatic capture of roving ends by the core sleeves, and automatically or on command, operating the flyers at a creeping third gentle speed less than the first gentle speed for startup and to position the flyers at selected angular positions.

Abstract: A roving frame for producing large-diameter and small-diameter roving bobbins has two rows of work stations with the work stations lying at vertices of a triangle for the production of small-diameter bobbins, flyers of a small span are provided for each of the spindles at each of the work stations whereas these flyers are replaced by large-span flyers which are located at every second work station. The triangle base has a length L which is just slightly greater than the diameter of the flyer in the case of the small diameter bobbins whereas the triangle side lengths are substantially equal to the diameter of the large-span bobbins.

Abstract: A roving frame having a suspension carriage track extending through the flyers thereof has a parking rail which can accommodate the full length of the suspension carriage train which removes the full bobbins from the flyer row and on the parking rail, by cooperation with a stationary bobbin/sleeve exchanger or one movable along the parking track, can transfer the full bobbins to a transport track and mount empty core sleeves on the suspension carriage train.

Abstract: A roving frame has operating elements which engage rods mounted on a shank of each flyer of a flyer rail transversely to the pivot axis of the rod which is offset from the rod. The pressing fingers are swingable about this axis and can be urged outwardly to clear the bobbins and thus allow bobbin replacement.

Abstract: After forming a package on a spindle from a roving fed to the spindle through a rotatable flyer finger, feed of the roving is stopped to arrest the flyer in a position with the finger anywhere on the package underneath the upper end of the last layer of turns formed on the package. The package is then lowered until the finger is above the upper end of the last layer of the turns formed on the package while the package is rotated in a reverse direction opposite to the forward direction without feeding more roving to the package. The package is rotated in the forward direction through at least one half revolution about the axis without feeding more roving to the package so as to form at least a partial loop of the roving around the package above the upper end of the last layer of the turns and then more roving is fed to the package while same is lowered until the finger is below the upper end of the last layer of the turns. Finally the package is raised to sever the roving upstream of the package.

Abstract: A spinning apparatus winds a strand onto a yarn package by relatively rotating a flyer and the yarn package about an upright axis so as to wind the strand in a succession of turns around the package by a flyer finger movable axially relative to the package. Each successive layer of turns is shorter than the preceding one so that the finished package has an axially upwardly tapered upper end. After substantially completely forming the package the rotation is generally stopped to leave the flyer in a position with the finger below the upper end of the last layer of turns formed on the package. Then the package and finger are relatively axially moved until the finger is generally at the upper end of the first layer of turns formed on the package. The flyer and package are then relatively rotated forward, that is in the same direction as when the package was being formed, through at least one half revolution about the axis so as to form a loop of the strand around the upper package end.

Abstract: An apparatus for controlling the lateral disposition of a guide roller of a traveling service unit on a textile machine is provided. The apparatus includes a first support wheel rotatably mounted on the traveling service unit and an adjustable wheel assembly. The adjustable wheel assembly includes a second support wheel laterally spaced from the first support wheel, a device for rotatably mounting the second wheel to the traveling service unit and a device for selectively adjusting the vertical displacement of the second wheel relative to the traveling service unit to maintain the guide roller at a predetermined disposition relative to a guide surface of the textile machine. The device for selectively adjusting the vertical displacement of the second wheel includes, in one aspect of the invention, a cylinder and piston assembly and, in another aspect of the invention, a pair of bell cranks interconnected to one another by a cylinder and piston assembly.

Abstract: A guiding device for a traveling service unit for a spinning machine having guide rollers supporting the service unit on the floor and related to a rail engaging member to maintain the service unit at a predetermined spacing from a guide running along the machine. In one form of the invention, the guide rollers are pivotally mounted and are pivoted by a connecting rod of the rail engaging member to direct the guide rollers toward or away from the rail upon any deviation of the travel of the service unit so that the service unit will be guided at a proper spacing from the rail and, therefore, from the components of the spinning machine. The control rod can be maintained in proper relation to the rail by followers on the rod straddling the rail or by a spring mounted on the servicing unit and biasing a follower roller on the rod against the rail.

Abstract: A traveling service unit for an associated textile spinning mill machine may be elevationally adjusted with respect to a reference rail mounted longitudinally along the machine by a feeler guide element pivotably mounted to the service unit in following engagement to the reference guide rail in conjunction with an operatively associated controller connected with vertically adjustable roller support assemblies of the service unit 1 for varying the elevation of the service unit 1 as necessary to compensate for deviations in the pivotal disposition of the feeler guide element with respect to horizontal.

Abstract: In a traveling service unit of the type utilized in conjunction with a textile spinning mill machine, the transverse and longitudinal inclination of the service unit with respect to the machine is monitored and adjusted with respect to a fixed horizontal reference plane by at least two electronic levels or like inclination detectors each operatively connected through an associated controller with a vertically-adjustable roller wheel supporting assembly of the service unit for controlling the elevation of the service unit at each supporting assembly to compensate for detected inclination deviations.

Abstract: An apparatus for automatic exchange of at least one full bobbin with at least one empty bobbin in a flyer, i.e. a flyer doffer, comprises a transport device reaching the flyer acting to transport the full bobbins and the empty bobbins, a doffing region and a mounting region which reach the spindles of the flyer for groupwise exchange of the full bobbins with the empty bobbins on the spindles and a lifting region reaching the transport device for groupwise exchange of the full with empty roving bobbins on the transport device. The doffing region and the mounting region on one hand and the lifting region on the other hand are spatially separate from each other. An exchanging region extending to the doffing, mounting and lifting regions is provided. Advantageously the doffing region and the mounting region are combined in a single doffing and mounting region.

Abstract: A bobbin rotating on a spindle in order to draw slivers into rovings coacts with a presser foot which is swingable in an eccentric wing of a flyer journaled on a fly frame above the bobbin and coaxial therewith. The inward swing of the presser foot is limited to a distance from the spindle axis which is slightly less than the radius of the bobbin so as to enable an outward camming of that foot, against the force of a biasing spring inside the wing, with the aid of a beveled surface on the presser foot and/or on the bobbin top when the spindle carrying an empty bobbin initially rises relatively to the fly frame.

Abstract: A method and apparatus for changing bobbins in a flyer spinning frame which includes a bobbin rail for supporting bobbins adjacent the flyers movable both vertically and tiltably, the bobbin rail being moved sequentially from an upper bobbin winding position, a lower horizontal position, a forwardly tipped position, then upwardly in the tilted position into a comfortable bobbin doffing position, downwardly into the lower position, back into a horizontal position while in the lower position then finally upwardly into the upper bobbin winding position.