Method and apparatus for controlling the yarn tension in a false twist texturing machine

US5369945A · kind A · utility

Assignee

• Barmag AG · DE

Inventors

• Bernd Wessolowski · Remscheid, DE
• Bernd Neumann · Radevormwald, DE
• Hellmut Lorenz · Lennep, DE

Key dates

• Filing date: Feb 9, 1993
• Grant date: Dec 6, 1994
• Expiry date: Feb 9, 2013

Classification

• Technology area (CPC D): Textiles; Paper
• CPC primary: D02G1/0266
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

A method and apparatus for controlling a false twist texturing machine, which extends the previously known process for controlling operation during the normal operation of the machine, to exceptional operating conditions, such as during yarn thread-up and/or restarting after a temporary stoppage of operation by reason of a power failure. In accordance with the invention, the known method which includes control of the frictional force imparted to the yarn as a function of the yarn tension, is modified in such a manner that during periods other than normal operation, the control of the frictional force as a function of the yarn tension is terminated, and a predetermined frictional force is imparted to the yarn.