Method and device for piecing a yarn in a spinning rotor of an open end spinning device

US4395870A · kind A · utility

Assignee

• Schubert & Salzer · DE

Inventors

• Heinz Neher · Reutlingen, DE
• Peter Artzt · Reutlingen, DE
• Heinz Muller · Waiblingen, DE
• Gerhard Egbers · Reutlingen, DE

Key dates

• Filing date: Jun 22, 1981
• Grant date: Aug 2, 1983
• Expiry date: Jun 22, 2001

Classification

• Technology area (CPC D): Textiles; Paper
• CPC primary: D01H4/50
• WIPO field: Textile and paper machines
• WIPO sector: Mechanical engineering

Abstract

A method and apparatus for piecing a yarn in a spinning rotor of an open end spinning device is disclosed wherein an increased quantity of fibers is momentarily fed into the spinning rotor after the yarn is returned to the spinning rotor, whereupon the fiber supply is reduced to the normal supply quantity. Preferably, during termination of the spinning process, fibers are stored between a supply device and a fiber opening device which on commencing the piecing process are suddenly released, while at the same time the fiber supply resumes at the normal rate. For effecting the method an abutment surface (110) is preferably provided in a feed channel (11) on the side of a clamping point (15) of a clamping lever (5) for acting on the feed channel (11) facing away from the opening roller (2). The abutment surface (110) is abutted by a tow guide funnel (51) of the clamping lever (5) during a first part of the pivotal movement of the clamping lever, while during a second part of the pivotal movement of the lever, a clamping end (51) of the clamping lever (5) engages the fiber tow 4 at the clamping point (15) of the feed channel (11) and the guide funnel lifts from the abutment surface (11…