Yarn withdrawal nozzle for an open-end rotor spinning arrangement and method of making same
AssigneeMaschinenfabrik Rieter AG
InventorGuenter Baur
Life of this patent
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Abstract
A yarn withdrawal nozzle for an open-end rotor spinning arrangement is provided which includes a spiral-shaped surface in the yarn deflecting area which extends essentially over the entire yarn deflecting area and designed as a continuous spiral without interruptions. In addition thereto, the nozzle throat of the yarn withdrawal nozzle includes a further surface with structure downstream of the spiral-shaped surface, including rounded notches or curved humps. Both the spiral-shaped surface and the downstream structure are so designed that they are capable of transferring forces to the yarn without damaging same. The yarn withdrawal nozzle is moulded with a mould separation provided in an area downstream of the nozzle throat to facilitate assembly.
Claims21
Yarn withdrawal nozzle for an open-end rotor spinning arrangement with improved spinning stability comprising
- a funnel-like decreasing yarn deflecting area ending in a substantially cylindrical entrance of a nozzle throat,
- in which a spiral shaped structure extends essentially over the entire yarn deflecting area,
- wherein the spiral shaped structure up to the nozzle throat is designed as a continuous surface without any interruptions, and
- wherein the nozzle throat in a yarn delivery direction downstream of the yarn deflection area is provided with a structure of a different shape, and wherein the structure of the yarn deflecting area and the structure of the nozzle throat consist of rounded bulges and/or rounded recesses, so that because of the structures, forces are transferred to the yarn without the yarn being damaged.
Dependencies are inferred from the claim text.