Yarn supply apparatus for textile machines in which the yarn supply required varies over time, in particular for knitting machines

US4829790A · kind A · utility

Assignee

• Gustav Memminger · DE

Inventors

• Gustav Memminger · Freudenstadt, DE
• Falk Kuhn · Rottenburg am Neckar, DE
• Heinz Fabschitz · Westerham, DE

Key dates

• Filing date: Sep 7, 1988
• Grant date: May 16, 1989
• Expiry date: Sep 7, 2008

Classification

• Technology area (CPC D): Textiles; Paper
• CPC primary: D04B15/48
• WIPO field: Textile and paper machines
• WIPO sector: Mechanical engineering

Abstract

A yarn supply apparatus for textile machines, particularly for knitting machines, has a rotatable yarn supply means supplying yarn under essentially slipless conditions to the textile machine; a speed controlled motor coupled to the yarn supply means controls the rotation of the yarn supply means. A movable yarn tension element is positioned in the path of yarn from the yarn supply means to the textile machine and is subjected to a bias force means that determines the yarn tension. A yarn reserve zone is formed in the path of the yarn from the yarn tension element to at least one of the yarn guide elements, the size of this zone depending on the position of the yarn tension element. Coupled with the yarn tension element is a transducer that provides a signal representative of the position or movement of the yarn tension element to an electrical circuit that includes the drive motor. By means of this circuit, the motor can be stopped whenever the yarn tension element, in a movement in the direction in which the yarn reserve increases in size, reaches a limit position of its working range. Adjacent to this limit position is a further operating range, in which yarn holding means are p…