Abstract: A method and apparatus for individually piecing up yarn on an open-end spinning machine which has a spinning rotor and a rotor brake. A rotor cleaning apparatus is carried on a pivotal cover and is used for cleaning the rotor responsive to being activated. A pivotal lever which when moved relative to the cover simultaneously activates the rotor cleaning apparatus and the rotor brake causing the rotor to be cleaned as the rotor is being stopped. The yarn is pieced up when the rotor is being brought back up to running speed.

Abstract: A method and device for cleaning a rotor in an open-end spinning machine. While the rotor is running at a speed less than the normal r.p.m. a first flow of cleaning air is directed to a collecting groove of the rotor and a second flow of cleaning air is simultaneously directed to the periphery of the spinning rotor at an angle different from the first flow of air. In one embodiment, at least one of the flows of air is directed in a pulsating manner. The flows or streams of air are fed through ducts provided in an extension of a cover which extends within the rotor or is supplied to the rotor by means of a movable housing.

Abstract: The invention relates to a method for producing a wrapped yarn which consists of a bundle of textile fibers essentially without twist wrapped spirally by a binding-thread wherein prior to wrapping, the bundle of textile fibers is false-twisted and is introduced together with a binding-thread into the hollow spindle of a wrapping member having a binding-thread bobbin and a device for carrying out the method.

Abstract: The invention relates to apparatus and method for producing a wrap-around yarn of the type having an untwisted core thread with a binder thread helically wrapped around the core thread wherein the core thread is given a false twist and the core thread and binder thread are passed through separate openings through a hollow spindle to a core thread deflection point at which time the false twist is removed from the core thread and at which point the binder thread is wrapped helically around the core thread.

Abstract: An apparatus for bringing to rest the rotor of an open-end spinning apparatus which is covered by a cover. The rotor is mounted in a wedge gap formed by freely rotatably support rollers and pressed against the support rollers and driven by a tangential belt. An axial force arising from the support rollers presses the rotor against an axial stop. A lever is provided for lifting the shaft off of the support rollers and against stops for arresting the rotation of the rotor. Compressed air is applied to the rotor when the rotor is being brought to rest for maintaining the shaft of the rotor against the axial stop.

Abstract: A method and apparatus for piecing up a broken entwined yarn being produced on a machine from a bundle of spinning fibers and a binding thread. The bundle of spinning fibers are fed through a pair of delivery rollers into a rotating hollow spindle. The binding thread is carried on a bobbin that is, in turn, carried on the hollow spindle for being wrapped around the bundle of fibers as it passes through the hollow spindle producing an entwined yarn. Upon breaking of the entwined yarn the bundle of spinning fibers is deflected between the delivery rollers and the hollow spindle out of its normal path by a stream of suction air. An end of the entwined yarn is drawn off of a takeup bobbin and fed back through the hollow spindle and is united with an end of the binding thread. The ends of the binding thread and the entwined yarn are then twisted together with the bundle of spinning fibers and the production of the yarn is re-initiated.

Abstract: A fastening bar for securing printing plates to a printing machine, especially a rotary printing press, comprises a base and a clamping bar fastened thereto, the clamping and release of the printing plate being effected by an eccentric shaft. In the base one or more clamping elements are displaceably mounted and have ends juxtaposed with the opposing clamping surface of the clamping bar, the opposite ends bearing against springs which permit compensation for different thickness along the edge of the printing plate.

Abstract: Free flight magnetizable selector elements are transferable from a selector element store disc to a selector element support disc for selecting particular ones of a series of textile processing implements in response to a program. The discs are disposed with an arcuate portion of one disc closely adjacent to an arcuate portion of the other disc, and the selector elements are transferred from store disc sockets to support disc sockets and vice versa by a transfer magnet. The discs include magnets with opposite polarity to maintain transferred selector elements in the sockets of the selected disc until the transfer magnet effects another transfer. The sockets of the store means and support means have the same pitch as the textile implements; however, the sockets of the entire support means may be distributed among a set of identical superjacent discs each having a socket pitch an integer multiple of the textile processing implement pitch. The store means has a corresponding set of superjacent discs.