Process and apparatus for producing open-end spun yarn

US4170866A · kind A · utility

Inventors

• Frank Aschenbrenner · Matthews, US
• William V. Wright · Charlotte, US

Key dates

• Filing date: Jul 31, 1978
• Grant date: Oct 16, 1979
• Expiry date: Jul 31, 1998

Classification

• Technology area (CPC D): Textiles; Paper
• CPC primary: D01H4/28
• WIPO field: Textile and paper machines
• WIPO sector: Mechanical engineering

Abstract

A process and apparatus for producing open-end spun yarn using an electrostatic field produced by a pair of spaced electrodes in combination with a spinning rotor having an acutely inclined circumferential wall and a circumferential groove at the junction between the inner surface of the rotor wall and the planar surface of the rotor. Staple fibers are fed to the electrostatic field where they are generally linearly oriented and straightened and from which the fibers are aerodynamically withdrawn and fed onto the inner surface of the inclined rotor wall by means of a feed passageway tangentially oriented to the inclined rotor wall and having a gradually decreasing cross-sectional area so as to impose upon the fibers fed therethrough an ever-increasing velocity. The fibers centrifugally progress along the inner surface of the inclined rotor wall and gather in the circumferential rotor groove at which point the fibers begin to combine through cohesion both with other fibers in the groove and with the fibers in the tail of the yarn which is being twisted and withdrawn from the rotor, thereby forming a strand of fibers cohering to the tail of yarn previously formed. The formed yarn is …