Method and apparatus for inserting weft threads in multiple-colo

Textiles: weaving – Weft manipulation – Weaving with stationary weft supply

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D03D 4730

Patent

active

046467912

ABSTRACT:
Multiple-color air jet looms successively insert different kinds of weft threads into warp sheds to weave a fabric of desired construction. The different weft threads are subjected to different resistances to their being drawn through a main nozzle and are carried on air jets under different conditions, so that the weft threads will be inserted unstably at different speeds. With the arrangement of the invention, selected weft threads for insertion are carried, one at a time, through the warp shed under respective different weft carrying forces suited for the weft threads. The different weft carrying forces may be produced by varying pressures at which air is ejected, intervals of time during which air is ejected under pressure, or the manner in which subnozzles are positioned along the warp shed. There is provided a control means for changing the air pressures and ejection time intervals in synchronism with operation of the air jet loom.

REFERENCES:
patent: 3818952 (1974-06-01), Vermeulen
patent: 4020877 (1977-05-01), Spisiak
patent: 4143682 (1979-03-01), Jansa et al.
patent: 4326565 (1982-04-01), Van Mullekom
patent: 4410016 (1983-10-01), Manders
patent: 4448222 (1984-05-01), Arakawa
patent: 4450876 (1984-05-01), Van Mullekom
patent: 4534387 (1985-08-01), Van Hest

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