Textiles: weaving – Weft manipulation – Weaving with stationary weft supply
Patent
1993-05-21
1994-09-13
Falik, Andrew M.
Textiles: weaving
Weft manipulation
Weaving with stationary weft supply
1394355, D03D 4730
Patent
active
053459768
ABSTRACT:
In order to avoid or at least minimize weft thread breaking in an air nozzle loom, the supply of pressurized air to the relay nozzles is controlled in such a manner that the velocity of the blowing air is diminished toward the end of the weft thread insertion channel near its exit end. As a result, the tension on the weft thread is correspondingly reduced and the diminishing of the blowing air velocity can take into account any dynamic characteristics of the particular type of thread being inserted. Additionally, upon completion of the travelling weft thread insertion field, a weft thread tensioning field is imposed on the weft thread for properly tensioning the weft thread for the beat up. The tensioning following the insertion is applied only by selected nozzles or groups of nozzles, for example, by a group in the center of the weaving width and by a group toward the exit end of the insertion channel.
REFERENCES:
patent: 4445546 (1984-05-01), Hintsch
patent: 4532964 (1985-08-01), Lerch
patent: 4759392 (1988-07-01), van Bogaert et al.
patent: 4787423 (1988-11-01), Hrus et al.
Falik Andrew M.
Fasse W. F.
Fasse W. G.
Lindauer Dornier GmbH
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