Schubert & Salzer

Rieter Ingolstadt Spinnereimaschinenbau Ag

Schubert & Salzer Maschinenfabrik Aktiengesellschaft

Erwin Braun

Edmund Schuller

Erich Bock

Rupert Karl

Karl Rupert

Ulrich Roediger

Anthony Ball

Walter Mayer

Michael Maria Strobel

Eberhard Grimm

Rudolf Oexler

Karl Handschuch

Burkhard Wulfhorst

Franz Schreyer

Erick Bock

A process for piecing a broken yarn on an open-end spinning device in which the fiber feed to the fiber collection surface, and which has been interrupted during stoppage of the open-end spinning device. The fiber feed is switched back on and is immediately brought to full production speed. In this process the combed-out state of the fiber tuft at the point in time of when fiber feed is switched back on is ascertained. The point in time when yarn draw off is switched back on and the speed of it are adapted to when the feeding of fibers to the fiber collection surface becoming effective. The yarn is subjected to a multi-phase acceleration. The first phase of the draw-off acceleration is adapted to the incorporation of fibers into the back-fed yarn end. At least one additional phase of the draw-off acceleration serves to reach and/or to maintain the desired fiber mass. The control device to carry out the piecing process is connected to a device for the ascertainment of the combed-out state of the fiber tuft at the moment of piecing and the control device controls the yarn draw-off as a function of this ascertained combed-out state of the fiber tuft. At least two yarn accelerating devices are provided which can be selected by the control device.

Method and device for joining yarn in an open-end spinning means

A device for the feeding and opening of a fiber sliver for an open-end spinning device, having a feeder roll, a pressure roll interacting with the feeder roll and an opening roll. The device includes a tray with two guide walls guiding the fiber sliver between the pressure roll and the opening roll and laterally between themselves. The pressure roll is mounted in the feeding tray which has a supporting surface between the feeding roll and the opening roll, to support the fiber sliver and which is delimited by the guide walls. The opening roll is driven in the same direction of rotation as the feeder roll.

Device to feed and open a fiber sliver on an open-end spinning device

In an open-end spinning device with a spinning rotor a compressed air conduit is provided for directing an air current upon the inner surface of the spinning rotor. This compressed air conduit is connected through a stop valve to a source of compressed air. The compressed air conduit is provided with a pressure control device which can be pre-set to at least two pressure levels. The pressure control device has parallel conduits of which one conduit is provided with a pressure reduction device for the low pressure. During the preparation of the piecing operation, compressed air, at high pressure, is fed into the spinning rotor to clean said spinning rotor. Subsequently, but before the start of fiber feeding into the spinning rotor, the compressed air is reduced to a lower pressure value and is finally switched off before the yarn is fed back into the spinning rotor. The invention includes the process for restarting the open-end spinning device. Both the process and the device may be manually or automatically operated.

Open-end spinning machine and process for the start-up of such a device

The method and apparatus for removing irregularities in a thread being produced on a machine as the thread is traveling to a takeup device. A thread reserve having a suction applied thereto causing a loop to be formed therein which contains said irregularity. An additional pair of loops are formed in said thread, one above and one below the thread reserve. The loop formed in the end of the thread reserve is severed from the thread and the two remaining loops are inserted into a thread joining device. A thread suction extractor associated with the thread joining device pulls the end portions of the pair of loops taut permitting the joining operation to take place and, after joining of the thread, removing the separated ends. The thread reserve is provided with mechanism for maintaining the loop of thread extending therein separated and for severing and removing the portion of the loop containing the irregularity from the thread.

Method and apparatus for removing an irregularity in a thread

A pair of draw-off rollers (10, 11) of a thread drawing-off device comprising an over-mounted pressure roller (11) which cooperates resiliently with a driven roller (10) which projects across the front of the pressure roller (11). The pressure roller (11) has at least one recess (113, 114) on its front face (110) which is dimensioned in such a way that it temporarily completely releases a thread (4) sliding along the surface of the driven roller (10) and lying adjacent to the front (110) of the pressure roller (11). By means of a device of this type, the thread (4) is drawn off, for the purposes of joining, to such an extent from the spool (31) that the thread (4) reaches the side (310) of the spool (31) which is facing away from the front (110) of the pressure roller (11) provided with recesses (113, 114). The thread is then introduced into the spinning chamber (2) and is joined. The thread is then guided, using the thread tension, past the front (110) of the pressure roller (11) provided with recesses (113, 114) and introduced into the clamping line of the pair of draw-off rollers (10, 11) and is immediately subjected at this point to a predetermined draw-off.

Thread drawing-off device and method for the insertion of the _drawn-off

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.

Process and apparatus for individual piecing up of single open end

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.

Method and device for cleaning spinning rotors in open-end spinning

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.

Growing community of inventors

Ingolstadt, Germany

Erwin Braun