Method and device for starting the operation of a friction spinning machine

US4541234A · kind A · utility

Assignee

• W. Schlafhorst AG & Co. · DE

Inventors

• Heinz-Georg Wassenhoven · Wittlich, DE
• Josef Derichs · Mönchengladbach, DE

Key dates

• Filing date: May 21, 1984
• Grant date: Sep 17, 1985
• Expiry date: May 21, 2004

Classification

• Technology area (CPC D): Textiles; Paper
• CPC primary: D01H4/52
• WIPO field: Textile and paper machines
• WIPO sector: Mechanical engineering

Abstract

Method for starting the operation of a friction spinning machine, including friction surfaces movable in opposing directions for forming a spinning wedge, a device for supplying fiber to the spinning wedge, a thread withdrawal device, at least one suction device acting on the spinning wedge during the spinning operation, a suction tube disposed at an end of the machine opposite the thread withdrawal device, and a suction air source connectible to the suction device and to the suction tube, which includes: PA1 stopping the fiber supply and the motion of the friction surfaces; PA1 disconnecting the suction device from the suction source; PA1 supplying suction air from the suction source through the suction tube at the spinning wedge for inserting a thread into the spinning wedge; PA1 keeping the thread in a tensioned condition in vicinity of the spinning wedge; PA1 operating the suction device with a given suction power; PA1 moving the friction surfaces around the thread with a given speed to remove the twist of the thread at a given location; PA1 breaking the thread with tension at the given location severing a piece of thread; PA1 sucking the severed piece of thread into the suctio…