Arrangement for condensing a drafted fiber strand

US6185790A · kind A · utility

Assignees

• Fritz Stahlecker · DE
• Hans Stahlecker · DE

Inventor

• Hans Stahlecker · Lützen, DE

Key dates

• Filing date: Jul 29, 1999
• Grant date: Feb 13, 2001
• Expiry date: Jul 29, 2019

Classification

• Technology area (CPC D): Textiles; Paper
• CPC primary: D01H5/86
• WIPO field: Textile and paper machines
• WIPO sector: Mechanical engineering

Abstract

A condensing zone for condensing a drafted twist-free fiber strand is arranged downstream of a drafting arrangement of a ring spinning machine. The condensing zone includes a stationary sliding surface having a suction slit extending essentially in a fiber strand transport direction. A perforated transport belt transports the fiber strand over the suction slit of the sliding surface. The transport belt wraps around a bottom roller of a front roller pair of the drafting arrangement and is driven by the bottom roller. The transport belt drives in turn a nipping roller, which limits the condensing zone on its exit side with a nipping point serving as a twist block. The nipping roller presses the fiber strand and the transport belt against the sliding surface of the condensing zone.