Abstract: A feed yarn joining system for joining a yarn tail end of a yarn package to a yarn head end of a reserve package at a package creel including package storage sites for receiving the yarn and reserve packages, with receiving units for receiving the yarn head end and the yarn tail end, positioning units for positioning a yarn portion joined to the yarn tail end and yarn head end in the yarn splicing device, the yarn splicing device for preparing and joining the yarn head end and yarn tail end, and a control unit for initiating the start of the splicing operation and executing the splicing operation. Furthermore, a package creel arrangement with a feed yarn joining system as well as a method of joining a yarn tail end of a yarn package to a yarn head end of a reserve package when using a feed yarn joining system.

Abstract: A driverless transport vehicle for autonomous transport and replacement of at least one spinning can. In order to provide a driverless transport vehicle which reliably ensures an automated supply of the spinning machines fed with fibre band, the driverless transport vehicle has an autonomous travelling drive, a transport platform for accommodating the at least one spinning can, and a manipulator unit for taking up and setting down the at least one spinning can, the manipulator unit having a gripper for grasping the spinning can and an actuating device for adjusting the gripper.

Abstract: Process and apparatus for damping vibrations in a machine for winding material webs, in which the apparatus includes at least two cylindrical bodies. The process includes positioning the at least two cylindrical bodies to roll on each other to form a nip, such that at least one of imbalance and out-of-roundness of either of the at least two cylindrical bodies form a system capable of vibration. The process further includes actively damping vibrational forces of the vibration system in at least one of the at least two cylindrical bodies by displacing an axis of rotation of the at least one of the at least two cylindrical bodies in accordance with a current one of a plurality of vibrational force measurements made per each rotation of the at least one of at least two cylindrical bodies and with additional energy fed from outside of the vibration system.

Abstract: A machine for cross cutting a material web has a main frame part unitarily formed with a pair of transversely spaced main sides and with at least one main traverse extending transversely between the main sides and a secondary frame part unitarily formed with a pair of transversely spaced secondary sides and with at least one secondary traverse extending transversely between the secondary sides. The main frame part is formed at its sides with a seat on which the respective sides of the secondary frame part fit complementarily with the main and secondary traverses extending parallel to each other. Two blade drums rotatable about respective transversely extending drum axes have ends journaled in the sides at the seat. Fasteners secure the frame parts together at the seat to opposite sides of the drum ends.

Abstract: In order to stack sheets (1) of paper or cardboard transported by a stream feeder onto pallets (4), devices are known which comprise a vertically fixed transport mechanism (2) for the sheets (1), placed above the ground, above the maximum stack height, and a stacking platform (5) which can be raised and lowered, and on which the piles (3) are formed. Ejection rolls (10) and separating shoes (11) are arranged in the form of stack-forming elements, behind the transport mechanism (2), acting on the longitudinal edges of a sheet (1). According to the invention, the separating shoes (11) are formed in a cuneiform manner with a separating edge extending upwards from a tip situated on the entrance side in the displacement direction of the sheets. Said shoes are arranged in the displacement direction of the sheets, behind the ejection rolls (10), in such a way that the separating edge starts below the ejection height of the ejection rolls (10).

Abstract: A device for cross cutting a cardboard web in which, both the blade drums, a sheet transport conveyor accelerates the sheets and then the sheets are positioned to shingle the sheets on a further conveyor. The sheet transport conveyor has a rerouting roller at the outlet side of its upper pass and then extends downwardly into a sheet discharge gate through which defective sheets are effected.

Abstract: In order to stack sheets of paper or cardboard (11) transported by a stream feeder onto pallets (4), devices arm known which comprise a stacking platform (5) which can be raised and lowered, and on which the piles (3) are formed. During the stacking process, the longitudinal edge of a sheet (1) is guided by a separating plate (12) which is suspended on a holding element fixed in the machine frame, and is connected to a vibrator (13) in the form of a shaking element. According to the invention, in order to improve the shaking effect of the separating plate (12), a holding plate (18) is fixed, by means of rubber elements (19), to the holding element fixed in the machine frame, in such a way that it is decoupled from vibrations, the separating plate (12) and vibrator (13) being suspended from the holding plate in a rigid manner.

Abstract: Devices for cross-cutting paper or cardboard containing a cross-cutting device with two cutting drums which are equipped with cross cutters are already known per se. A sheet transport device is arranged behind the cross-cutting device, containing a braking device with a braking cylinder. In order to prevent marks on delicate paper or types of cardboard on said sheets, the inventive braking cylinder comprises a cylindrical base body which is secured to the blade-type elements, said blade-type elements being made of an elastic material and protruding in a radial manner with ample distance between each other, ending in a cylindrical enveloping surface which is coaxial in relation to the base body.

Abstract: Process and apparatus for damping vibrations in a machine for winding material webs, in which the apparatus includes at least two cylindrical bodies. The process includes positioning the at least two cylindrical bodies to roll on each other to form a nip, such that at least one of imbalance and out-of-roundness of either of the at least two cylindrical bodies form a system capable of vibration. The process further includes actively damping vibrational forces of the vibration system in at least one of the at least two cylindrical bodies by displacing an axis of rotation of the at least one of the at least two cylindrical bodies in accordance with a current one of a plurality of vibrational force measurements made per each rotation of the at least one of at least two cylindrical bodies and with additional energy fed from outside of the vibration system.

Abstract: A lubrication system for supplying lubricant to a plurality of antifriction bearings composed of inner and outer bearing rings and a plurality of rolling elements mounted between the rings. The lubricant is intermittently supplied to the region of the rolling elements, with the amount of each intermittent supply being determined as a function of operating data which are continuouslu acquired from the bearing.

Abstract: A lubrication system for supplying lubricant to a plurality of antifriction bearings, and which has a lubricant supply tank and a closed circuit lubricant supply line having two ends which communicate with the tank. A pump circulates the lubricant through the line, and a pressure regulating valve in the downstream end portion of the line maintains a desired pressure in the line. A plurality of tap lines lead from the closed circuit supply line to respective bearings via a metering or controllable valve.

Abstract: The present invention relates to an antifriction bearing with an external lubricant supply system, which includes a lubricant duct which extends through the outer ring or inner ring of the bearing, and which terminates in the direct vicinity of the rolling elements of the bearing.

Abstract: A draw process is described, in which yarns in particular of thermoplastic plastics are drawn by influencing their temperature, so as to improve the yarn properties. The process can be employed in a spin process or in a subsequent improvement step. In accordance with the invention, the temperature of the temperature modulating device is controlled as a function of a yarn tension signal, which is obtained within or downstream of the draw zone.

Abstract: A yarn winding method for an apparatus with a rotatable turret accommodating two winding spindles which are alternately moved to a winding range and to a doffing range for replacing full packages with empty tubes, the doffing range having two stopping positions, and the exchange of fully wound packages and empty tubes occurring in two steps.

Abstract: A yarn winding spindle is disclosed which is characterized by the ability to grip the interior of a tubular bobbin during the winding of the yarn thereon and then release the bobbin to facilitate doffing. The spindle comprises a cylindrical support member which is composed of a plurality of axially spaced apart annular entrainment members and a plurality of annular, elastic clamping members mounted between adjacent entrainment members. The elastic members are configured and internally self-biased so as to assume a radially extended position to engage the bobbin in the absence of an external force being applied thereto, and to assume a radially retracted position to release the bobbin upon a biasing force being applied thereto.

Abstract: The invention relates to a high speed yarn winding machine for winding a filament yarn, and which comprises a motor-driven winding spindle and a contact roll rotatingly resting against the surface of a yarn package being wound on the spindle, and with the contact roll serving to guide the yarn onto the package. The contact roll is adapted to be raised from the package surface during a package doff, and it can be rotatably driven while in its raised position by an air turbine wheel, which is co-axially connected to the contact roll. The wheel is provided with two annular rings of recesses which are concentric to its axis, and an air supply system is provided which is able to selectively direct compressed air toward either one of the two rings of recesses, to thereby permit the turbine wheel and thus the contact roll to be rotated in either direction.

Abstract: A yarn withdrawal apparatus and method is disclosed for temporarily withdrawing a freshly spun and continuously advancing yarn to a waste container when the spinning operation is interrupted, and for thereafter threading the yarn onto the feed godet or winder of the spinning machine. The apparatus comprises a yarn advancing means in the form of a rotating tapered roll, which is adapted to have the yarn looped thereabout. The tapered roll comprises a yarn inlet portion and a yarn exit portion, with the inlet portion being designed to initially contact the advancing yarn. The cone angle of the inlet portion is predetermined so as to cause the yarn to initially engage the rotating roll without lateral slippage and thereby permit the rotating roll to exert a strong tension on the yarn. The yarn subsequently slips laterally along the yarn inlet portion of the roll and toward the yarn exit portion, and it is then tangentially withdrawn from the roll.

Abstract: A yarn withdrawal apparatus is disclosed for temporarily withdrawing a freshly spun and continuously advancing yarn to a waste container when the spinning operation is interrupted, and for thereafter threading the yarn onto the feed godet or winder of the spinning machine. The apparatus comprises a yarn advancing means in the form of a rotating roll, a yarn delivery tube including a yarn outlet opening, a yarn suction tube including a yarn inlet opening, and with the yarn delivery tube and yarn suction tube being mounted so as to permit relative rotation thereof about the axis of the roll and between a yarn catching position wherein the outlet opening and inlet opening are aligned, and a drawing-off position. Thus the relative rotation causes a yarn passing from the delivery tube to the suction tube to be at least partially looped about the rotating roll.

Abstract: A yarn withdrawal apparatus is disclosed for temporarily withdrawing a freshly spun and continuously advancing yarn to a waste container when the spinning operation is interrupted, and for thereafter threading the yarn onto the feed godet or winder of the spinning machine. The apparatus includes a yarn advancing means in the form of one or more rolls and which is adapted to have the yarn looped thereabout. Drive means is provided for rotating the roll or rolls of the advancing means, and a suction means is provided for withdrawing the yarn from the advancing means. In one embodiment, the yarn is initially drawn into the suction means, and then looped about the rotating roll of rolls which serve to frictionally engage the yarn and apply a high yarn tension, and so that the yarn is then in condition to be threaded onto the feed godet of the spinning machine.

Abstract: Advancing yarn is directed onto a larger diameter portion of a tapered yarn winding roll having a smaller diameter free end. The yarn is formed into windings that extend about the roll and that are continuously displaced along its length toward and, in most embodiments also from, its free end. The displacement of the yarn windings may be assisted by air currents and/or the force of gravity. The tension of the advancing yarn may be controlled by varying the axial location of its initial engagement with the roll. The apparatus may consist either of a single yarn withdrawal unit or of multiple interconnected units.