Rieter Machine Works, Ltd.

Maschinenfabrik Rieter Ag

Ernst Ott

Ludek Malina

Harold Dallmann

Christoph Kuratle

Martin Werder

In a textile spinning apparatus a yarn joining device (12) begins to work to join the end of a newly spun yarn with a retrieved yarn end after the breakage of a yarn (2). During the joining process draw-off rollers (3) continue, to supply the yarn (2) such that yarn storage members (4, 11) have to be implemented during the joining process. In order to draw the yarn (2) into the interior of the yarn storage members (4, 11), air suction is applied in a known manner. After the yarn (2) joining process is completed in the yarn joining device (12), the yarn storage members (4, 11) are successively emptied by use of an acceleration in yarn draw off speed effected by a yarn storage draw-off roller (7) and an auxiliary friction roller (14).

Method and apparatus for intermediate yarn storage during renewed spun

The spinning device for open-end spinning contains a withdrawal nozzle with a substantially spiral-shaped bead or ridge as well as a twist blocking element or twist trap containing beads or ridges and provided in a thread withdrawal passage. The inclinations of the substantially spiral-shaped bead or ridge and of the beads or ridges in the withdrawal nozzle and in the withdrawal passage, respectively, substantially extend in the same direction or sense as the twist of the yarn. This device permits increasing the stability of the yarn, reducing the number of thread breakages and/or increasing the production rate. The yarn characteristics are less dependent upon the fiber material and the yarn type. In particular, the production of yarns with a soft handle is rendered possible at higher rotor speeds than heretofore possible.

Spinning device for open-end spinning

The spinning device for open-end spinning comprises a withdrawal nozzle secured to a cover of a rotor housing for a spinning rotor and a nozzle body coacting with the withdrawal nozzle. The withdrawal nozzle and the nozzle body conjointly form a withdrawal passage or channel for the thread or the like produced by the spinning rotor. The cover is provided with a receiving socket which fixes the position of the nozzle body in radial direction, the nozzle body being inserted into the receiving socket. The nozzle body is pressed against the withdrawal nozzle by means of a manually-operable elastic device. The formation of the receiving socket permits insertion and removal of the nozzle body from the front side, that is from the service side of the spinning device. This provides the advantage of ready accessibility of the nozzle body and, in turn, thus affords easy replacement thereof. Replacement can be carried out without the use of tools. This also has the significant advantage of elimination of the risk of damage or scratching of the spinning device, which risk otherwise is present whenever tools are used.

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Flurlingen, Switzerland

Ernst Ott