Method and apparatus for controlling a thread-joining operation in rotor spinning machines

US4102116A · kind A · utility

Assignee

• W. Schlafhorst AG & Co. · DE

Inventors

• Josef Derichs · Mönchengladbach, DE
• Hans Raasch · Wittlich, DE
• Ludwig Neuhaus · Wittlich, DE
• Dieter Langheinrich · Wittlich, DE
• Helmut Schlosser · Viersen, DE
• Erwin Baltsch · Nettetal, DE

Key dates

• Filing date: Feb 14, 1977
• Grant date: Jul 25, 1978
• Expiry date: Feb 14, 1997

Classification

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

Abstract

Method of controlling a thread-joining operation in a rotor-spinning machine having a rotor formed with a fiber-collecting channel, wherein a pulse proportional to the rotary speed of the rotor is applied to control a measure of the material being processed in the spinning operation which includes automatically controlling advance feeding into the rotor of a quantity of fiber required for thread-joining and feeding the fiber beginning with withdrawal of a thread formed for the fiber as well as returning into the rotor the thread end to be joined and withdrawing the joined thread from the rotor during start-up of the rotor, the automatic control being in accordance with a quantity proportional to the peripheral velocity of the fiber-collecting channel of the rotor serving as control input variable for at least one of the fiber feed, the thread withdrawal, the beginning of the advance feeding and the beginning of the returning of the thread end, and device for carrying out the method.