Abstract: In controlling valves, it is desirable for identical stroke changes to result in identical flow changes. To produce a non-linearity between the positioning signal and the valve opening, linearity is achieved between the positioning signal and the quantity of flow. In this case, the required positioning signal, in order to achieve a given opening stroke, is selected so that a linear function is produced between the quantity of flow and the positioning signal. The thus found setting signal is entered into the position regulator to control the valve. The position regulator is equipped for this purpose with a microprocessor circuit which acquires and processes the results of the ascertainment of the working characteristic of the installation.

Abstract: For piecing a thread in an open-end spinning apparatus having a fibre collection surface, a sliver is supplied to the clothing of an opening cylinder and opened thereby into fibres and is supplied in this form to the fibre collection surface. There, the fibres are incorporated into the end of a returned thread which is then drawn off continuously. During this, the leading end of the sliver, forming a tuft, is supplied for piecing to the opening cylinder, at a penetration depth which is greater than the penetration depth after piecing, whereas piecing is carried out in a manner conventional per se, matched to a reduction in the penetration depth. This reduction in the penetration depth is carried out suddenly in order to counter thick points in the joint. To carry out the process, a penetration depth alteration apparatus is provided which is in controlled connection with a control apparatus.

Abstract: The instant invention relates to a process and to devices to convey textile goods from a receiving point to a point of deposit as well as for reception and deposit of the goods by means of a traveling vehicle. The goods to be conveyed are readied at the receiving points and are entered by a central computer. A conveying command is then elaborated by the central computer and is transmitted to a computing unit of the vehicle. The conveying vehicle is equipped with equipment for the autonomous and active execution of the conveying command. Upon completion of the conveying command, the vehicle reports back to the central computer. The conveyed goods are deposited in a sorted state.

Abstract: A method and apparatus for producing a yarn reserve, in particular on a cross wound package carried on a former which has an end which projects beyond the package. A groove is provided in the end portion for securing the yarn as the yarn is wrapped therearound before being brought back over the surface of the package for producing a yarn end reserve.

Abstract: Drawing frame for drawing fiber sliver with draw frame rollers comprising a pair of pre-drawing rollers and a main drawing roller pair. Power transmission members in the form of flat belts are used for driving the draw frame rollers. A deflection pulley engages the flat belts between respective pairs of wheels deflecting the belts for increasing the angle that the flat belt extends around the respective wheels to provide a non-slip engagement between the flat belts and the respective wheels.

Abstract: The instant invention relates to a spinning process and to a device for the production of a yarn. In the spinning process the fibers are conveyed to a perforated collection surface which is subjected to suction in one zone. They are brought together into a fiber accumulation on the collection surface. The fiber accumulation is drawn off from the collection surface and twisted into a yarn of predetermined twist in a twisting element which follows the collection surface in the direction of yarn draw-off. The fibers are accumulated at a suction edge constituting a collection line and are pre-twisted at said collection line.

Abstract: A process and device is provided to handle the yarn after piecing or bobbin replacement where conical bobbins are used. According to the process and with the apparatus, the yarn is transferred to the yarn guide in such a manner that the yarn is first guided in direction of the smaller diameter of the bobbin or former before the winding of the yarn over the entire bobbin width of the bobbin takes place.

Abstract: A process for the piecing of a yarn end on a open-end spinning machine. The yarn is backfed a first time from a cross-wound package, the backfeeding is interrupted and the yarn is clamped at a predetermined distance from the package and the free end is cut. The backfeeding is then resumed for a predetermined period of time and the yarn is temporarily stored between the clamping point and the package. The stored yarn is then wound onto the package in a plurality of parallel windings upon a predetermined generating line. The yarn clamp is released to backfeed the yarn remaining in the temporary storage device and to stretch or tension the yarn between the package and the backfeeding means. The yarn is reclamped and the excess yarn is cut to a predetermined length. The yarn is backfed to the spinning rotor of the open-end spinning machine to combine with fibers in the rotor to piece up the yarn, which is then drawn off the rotor and wound onto the package.

Abstract: A process for the transportation of cans between machines processing fiber slivers by means of a can conveying device. The latter is loaded and unloaded simultaneously in one position at a machine or storage facility. The cans are inspected during their transportation between two such machines. In this process, the cans in which fiber sliver remnants remain, are emptied. The route of the can conveying device constitutes a transportation system consisting of three interconnected can circuits, whereby a first can circuit comprises two such machines and the other two can circuits each comprise one of these machines and the can storage facility. The can shifting device, to load and unload the can conveying device is equipped with a grasping device to grasp the can and with a lifting device to lift up the grasped can.

Abstract: In an open-end spinning device a yarn draw-off nozzle suitable to ensure constant spinning conditions even at very high rotational speeds is provided. This is achieved in that the yarn draw-off nozzle is designed so as to be especially capable of heat dissipation and thus being capable of preventing a heat accumulation in the area of the yarn draw-off nozzle thanks to its high capability of heat dissipation.

Abstract: A yarn is fed at a piecing speed to the fiber collection surface of a spinning rotor. It is there combined with the fibers of a fiber ring and is then drawn off from the spinning rotor in the form of a continuous yarn while fibers newly fed into the spinning rotor continue to be incorporated in the yarn. The rotor speed is changed, immediately after piecing, from the piecing speed to a rotational speed which is lower than the piecing speed. The rotor speed is then increased to the production speed. In this manner, optimal conditions are achieved with respect to propagation of twist and draw-off of the piecing joint. To carry out this process, elements are provided for the reduction of the rotor speed from piecing speed to a lower value, for renewed acceleration of the rotor speed after a desired minimum value has been reached of after the passage of a predetermined period of time, as well as elements to tie the accelerating rotor speed to the desired production speed.

Abstract: The present invention relates to a spinning process and device for the production of yarn. Fibers are conveyed through a feeding channel from an opening roller and deposited onto a perforated collection surface, such as a perforated roll or disk, which is subjected to suction in at least one zone. The fibers are oriented on the collection surface along a main sense of orientation of the perforations. The fibers are conveyed through the suction zone and formed into a fiber accumulation along a collection line. A suction insert is included generally beneath the perforated collection surface and defines the suction zone and collection line for the fibers. The fibers forming into a fiber accumulation along the collection line are pre-twisted along the collection line. A separate twisting element independent from the collection surface is provided downstream from the collection surface and provides a final pre-twist to yarn drawn off of the collection surface.

Abstract: A measuring device for measuring the thickness of fiber bundles such as slivers or the like on high output speed drawing frames within a predetermined tolerance range. The fiber bundle thickness is measured by a pair of rollers, one of which is supported for rotation about a fixed axis and the other of which is supported for rotation about a movable axis which permits it to move towards and away from the roller on the fixed axis. At least one of the rollers is composed of a material having a low coefficient of heat expansion under the temperatures generated when the bundle of fibers passes between the pair of rollers at high production output speeds. This avoids distortions in the measurement of the thickness of the fiber bundle.

Abstract: A top bar for carding machines formed from an elongated hollow cold drawn annealed profile. The annealing relieves any stresses developed in the profile during the cold drawing and a dimensionally stable top bar results therefrom.

Abstract: In an open-end spinning device with a spinning rotor whose shaft bears axially upon the ball of a step bearing, said step bearing is designed for the attenuation of axial oscillations and shocks of the spinning rotor. The bearing includes an elongated housing provided with a ball supporting member and a resilient member.

Abstract: A yarn piecing device and process for an open-end spinning machine wherein opened fiber is fed to a fiber collection surface in a pneumatic stream. The stream of fibers is shifted from the fiber collection surface when a broken or missing yarn is detected and the fiber feed to an opening device is interrupted. After the yarn is back-fed to the collection surface, the fiber feed to the opening device is restarted and the pneumatic stream of fibers is shifted back to the fiber collection surface before the fiber density in the pneumatic stream attains its production strength density.

Abstract: A supporting-disk bearing, particularly for the shaft of an open-end spinning rotor, the shaft (1) being mounted in a wedge-shaped gap formed by supporting disks (4, 5), and the supporting disks (4, 5) having a running surface (40,50) consisting of an elastic covering against which the shaft (1) is pressed. The running surface (40,50) has at least one interruption formed by a recess and bridged by the line of contact of the shaft (1). The recess can be designed in various ways, but it is preferably groove-shaped. The wear of the running surface is reduced as a result of this design.

Abstract: A yarn splicing device for piecing spun yarns without knots. It contains a yarn splicing chamber and a small pipe through which fluid flows, at a distance from the yarn splicing chamber. The small pipe serves to receive a yarn end and to prepare it for the splicing process. The small pipe has a roughened inner surface which makes contact with the yarn end in a battering manner. In the process for the yarn end preparation, the small pipe is traversed turbulently by a fluid. The yarn end is battered by the turbulent flow against the roughened inner surface of the small pipe until the yarn end is free of twist.

Abstract: Drive arrangement for spinning stations of an OE spinning machine. The feed rollers of the spinning stations can be driven by an electric motor and the draw-off rollers by another electric motor. At least one of these two motors is a synchronous motor. Each of the two motors can be fed supply currents of adjustable frequency by a reverse rectifier, with the rotational speed of one of these two motors being adjusted as a function of the rotational speed of the other motor which is sensed by a pulse generator in such manner that the set rotational speed ratio of these two motors remains constant at operating speeds and in that the operating speeds are ensured even in case of brief network outage.

Abstract: A process and a device for the air-conditioning of spinning material located in a container. The spinning material is air-conditioned for processing in a spinning machine which is essentially surrounded by any room climate. The spinning material is exposed in the container to a climate which is independent of the room climate. This causes, at least, the spinning material to be taken next out of the container to be air-conditioned in such manner that it is in an optimal climatic state for such further processing. Outlet openings of at least one air-conditioning duct or an air-conditioning plant are located on the container so that an air-conditioned fluid flows out of the outlet openings on at least the spinning material to be taken out next and the spinning material is in an optimal climatic state for further processing as it is then processed further.