Method and device for increasing the hairiness and the bulkiness of a thread

US4516397A · kind A · utility

Assignee

• W. Schlafhorst AG & Co. · DE

Inventors

• Hans Raasch · Wittlich, DE
• Heinz-Georg Wassenhoven · Wittlich, DE

Key dates

• Filing date: May 31, 1983
• Grant date: May 14, 1985
• Expiry date: May 31, 2003

Classification

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

Abstract

A method of increasing the hairiness and bulkiness of a thread, in an open-end rotor spinning machine having a deflection ring disposed concentric to the axis of rotation of the rotor, includes forming a false twist in the thread with the deflection ring, continuously withdrawing the thread through the deflection ring substantially along the direction of the axis of rotation of the rotor, dissolving the false twist in the thread, forming a thread balloon with the thread, bringing the thread in contact with a multiplicity of separately disposed balloon disturbance elements, and changing the diameter of the thread balloon several times during each revolution of the thread balloon, and a device for carrying out the method.