Textiles: weaving – Weft manipulation – Weaving with stationary weft supply
Patent
1995-10-02
1996-09-10
Falik, Andy
Textiles: weaving
Weft manipulation
Weaving with stationary weft supply
242 4701, D03D 4734
Patent
active
055536417
ABSTRACT:
Device for positive modulated braking of weft feeder thread, including a braking body, typically a frustum-shaped braking body, that is supported frontally and coaxially to the drum of the feeder in order to directly or indirectly engage the thread that unwinds from the drum. The braking body is subjected to the action of an electromechanical actuator, supplied by an excitation current that is modulated so as to match the variation in the mechanical tension of the thread during the weaving process; the braking body is rigidly coupled to a support that is movable in the axial direction of the drum of the feeder and is supported and guided by a fixed support. The movable support is subjected to the action of a reversible motor that is supported by the fixed support, is supplied with the modulated excitation current, and is connected to the movable support with the interposition of a mechanical coupling capable of converting the angular movements of the shaft of the motor into corresponding translatory motions of the movable support with respect to the fixed support.
REFERENCES:
patent: 5316051 (1994-05-01), Zenoi et al.
patent: 5343899 (1994-09-01), Jacobsson et al.
patent: 5351724 (1994-10-01), Zenoni et al.
Falik Andy
Josif Albert
L.G.L. Electronics S.p.A.
Modiano Guido
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