Lamellar weft thread brake mechanism with a variable braking for

Details Lamellar weft thread brake mechanism with a variable braking for Lamellar weft thread brake mechanism with a variable braking for

1994-03-02

1995-03-21

Falik, Andrew M.

Textiles: weaving

Weft manipulation

Tensions

139450, 2424193, D03D 4734

Patent

active

053987314

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.

REFERENCES:
patent: 3633711 (1972-01-01), Pfarrwaller
patent: 3797426 (1974-03-01), Von Hagen
patent: 4641688 (1987-02-01), Gehring
patent: 4817681 (1989-04-01), Krumm et al.
patent: 5002098 (1991-03-01), Desmet et al.
patent: 5179980 (1993-01-01), Hubner et al.
patent: 5305966 (1994-04-01), Motta

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