Open-end spinning device

US6920746B2 · kind B2 · utility

Assignee

• Saurer GmbH & Co. KG · DE

Inventors

• Thomas Weide · Rheydt, DE
• Lothar Winzen · Herzogenrath, DE

Key dates

• Filing date: Nov 21, 2003
• Grant date: Jul 26, 2005
• Expiry date: Jan 14, 2024

Classification

• Technology area (CPC D): Textiles; Paper
• CPC primary: D01H4/08
• WIPO field: Textile and paper machines
• WIPO sector: Mechanical engineering

Abstract

An open-end spinning device has a spinning rotor (2) with a rotor groove (25) at its greatest inside diameter in which fibers are collected. A yarn shank (27) extending from a yarn withdrawal nozzle to the rotor groove (25) is curved in the vicinity of the rotor groove (25) counter to the direction of rotor rotation during the spinning process forming a lagging tie-up zone whereat yarn formation takes place. A rotor insert (18) is rotatably supported within the spinning rotor coaxially to the rotor axis. The rotor insert (18) can be caused to rotate in a contactless manner by the rotation of the spinning rotor. The rotor insert (18) comprises a yarn guide conduit (20) that receives the yarn shank (27) to effect a retardation of the rotor insert (18) during normal spinning operation, which significantly improves the stability of the spinning process over known open-end spinning devices.