Yarn-drafting apparatus

Details Yarn-drafting apparatus Yarn-drafting apparatus

1984-10-17

1986-05-20

Rimrodt, Louis K.

Textiles: fiber preparation

Working

Drafting

19258, D01H 532

Patent

active

045891680

ABSTRACT:
An apparatus used in combination with a yarn spinner has an upstream gripper roller assembly including at least an upstream roller pair gripping the yarn to be stretched, a downstream gripper roller assembly including at least a downstream roller pair spaced from the upstream pair and also gripping the yarn, and respective variable-speed drives connected to the upstream and downstream pairs for rotating same at respective slow downstream and fast upstream speeds and thereby passing the yarn from the downstream to the upstream pair while stretching it. Respective upstream and downstream sensors juxtaposed with the yarn adjacent the upstream and downstream roller pairs measure the yarn size and respective upstream and downstream controllers connected to the respective sensors and drives rotate the respective roller pairs at speeds dependent on the respective detected yarn sizes.

REFERENCES:
patent: 2682144 (1954-06-01), Hare
patent: 2981986 (1961-05-01), Neil
patent: 3012288 (1961-12-01), Werner
patent: 3088175 (1963-05-01), Aoki
patent: 3099048 (1963-07-01), Locher
patent: 3289255 (1966-12-01), Whitehurst
patent: 3694861 (1972-10-01), Whitehurst
patent: 4336684 (1982-06-01), Hartmannsgruber et al.
patent: 4369550 (1983-01-01), Meile

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