Abstract: In a method for manufacturing a twisted yarn a spindle rotor is positioned in a stationary cylinder housing. At least two spinning devices are supported in a receiving chamber of the spindle rotor such that the spinning devices are located adjacent to one another and symmetrical to the central axis of the spindle rotor. A vacuum is generated within the receiving chamber. Dissolved fiber material is supplied from a fiber supply device to the hollow spindle axle of the spindle rotor. The individual fiber material is fed by the vacuum within the receiving chamber via the hollow spindle axle 6 of the spindle rotor 7 and via feed channels, connecting the hollow spindle axle to the spinning rotors, to the spinning devices. From the dissolved fiber materials spun yarns are spun in each one of the spinning devices. The spun yarns are gathered as a twisted yarn at a centering point positioned on the extension of the central axis of the spindle rotor. The twisted yarn is wound onto a spool.

Abstract: In a method for manufacturing a twisted yarn by an integrated spinning-twisting process a vacuum is generated within the spindle rotor. Individual staple fibers are fed by vacuum to at least two rotor spinning devices positioned within the spindle rotor in which individual spun yarns are spun from the individual staple fibers. The individual spun yarns are gathered and guided in a first direction through the spindle rotor in order to subject the individual spun yarns to a first twist. The twisted yarn is guided in a second direction counter to the first direction to a centering element positioned above the rotor spinning devices whereby the twisted yarn forms a rotating yarn balloon about the spindle rotor. The twisted yarn is then wound onto a bobbin.

Abstract: In a method for joining a thread a spindle rotor with hollow spindle shaft is rotatably supported on a machine frame. A radially outwardly extending yarn guide channel is connected to the hollow spindle shaft. Two spinning devices with upwardly open spinning rotors are supported above the spindle rotor symmetrical to the central axis of the spindle rotor. A centering point is positioned on an extension of the central axis of the spindle rotor. A spun yarn is spun in each spinning device from dissolved fiber material and led upwardly away from the spinning rotors, reversed in their direction of movement by 180.degree., and introduced into the hollow spindle axle. The spun yarns form a yarn balloon between the yarn guide channel and the centering point, and twisted yarn is removed from the centering point. The dissolved fiber material is fed to the spinning devices through the yarn balloon.

Abstract: A device for producing a twisted yarn has a spindle rotor with a hollow spindle axle connected to a vacuum source and also has a vacuum chamber connected to the hollow spindle axle. A fiber-dissolving device for producing individual staple fibers is provided. At least two spinning rotors are positioned in the vacuum chamber for spinning spun yarns from the individual staple fibers. A centering device is positioned above the spinning rotors on the axis of the hollow spindle axle. The spindle rotor has an annular channel for receiving the individual staple fibers from the fiber-dissolving device. The spindle rotor has supply channels connected between the annular channel and the spinning rotors for supplying the individual staple fibers from the annular channel to the spinning rotors. The spindle rotor has spun yarn removal channels for removing the spun yarns from the spinning rotors and for guiding the spun yarns to the centering device.

Abstract: In a method and apparatus for manufacturing a yarn from fiber material at least two spinning devices arranged adjacent to one another are provided. Fiber material is dissolved and fed to the at least two spinning devices. Each spinning device generates an individual spun fiber. The individual spun fibers are combined at the inlet opening of a hollow spindle axis to form a yarn. The yarn undergoes a two-for-one twisting operation by being passed in a first yarn feeding direction through the hollow spindle axis to an outlet opening of the hollow spindle axis, then radially guided from the outlet opening, and guided in a second yarn feeding direction counter to the first yarn feeding direction to form a yarn balloon rotating in a direction of rotation about the at least two spinning devices. A centering element is arranged on an axis extending along the hollow spindle axle so as to be spaced from the inlet opening of the hollow spindle axle.

Abstract: A flat bar for a travelling flats assembly of a carding machine includes a carrier body having opposite end faces spaced from one another parallel to a longitudinal axis of the carrier body; and a flat bar end adjoining each end face of the carrier body. Each flat bar end includes an element which has a gliding portion having a part arranged for being in a gliding contact with a slideway of the travelling flats assembly; and a securing portion supporting the gliding portion and being attached to the carrier body.