Lamellar weft thread brake mechanism with a variable braking force

US5398731A · kind A · utility

Assignee

• Lindauer DORNIER Gesellschaft mbH · DE

Inventor

• Rainer Schuster · Sigmarszell, DE

Key dates

• Filing date: Mar 2, 1994
• Grant date: Mar 21, 1995
• Expiry date: Mar 2, 2014

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B65H2701/31
• WIPO field: Handling
• WIPO sector: Mechanical engineering

Abstract

In a weft thread brake mechanism with a controllable braking effect, a controllable braking force is applied to a weft thread as it passes between two lamellar braking members, such as leaf spring members. A servomotor, preferably a stepper motor, rotatingly drives an eccentric brake effect control member that cooperates with at least one of the lamellar brake members. Through the eccentric rotation of the braking effect control member, it presses to a varying degree against at least one of the lamellar braking members. Thus, a varying braking force is applied by the lamellar braking members to the weft thread. A programmable computer control provides control signals for the stepper motor.