Rotary drafting apparatus

Details Rotary drafting apparatus Rotary drafting apparatus

1974-07-03

1976-07-13

Newton, Dorsey

Textiles: fiber preparation

Working

Drafting

19258, D01H 524

Patent

active

039685438

ABSTRACT:
A rotary drafting apparatus for use in a spinning machine, which apparatus comprises a pair of back rollers coactively rotatable for guiding therethrough sliver to be drafted, and a pair of front rollers coactively rotatable for drafting the guided sliver. A sliver control mechanism is interposed between the back rollers and the front rollers and includes plural pairs of control rollers, which are rotatably supported through their respective support shafts and which are formed with numerous needles, so that the guided sliver may be combed when it is passed therethrough. A rotation regulating mechanism is also incorporated in the drafting apparatus so as to regulate rotation of that pair of the control rollers, which is positioned closer to the front rollers, substantially at a predetermined constant angular velocity in a manner to be free from being affected by any possible variation in the drafting force of the front rollers, thereby minimizing unevenness in thickness of the sliver obtainable.

REFERENCES:
patent: 2761179 (1956-09-01), Lepoutre
patent: 3248902 (1966-05-01), Radtke
patent: 3611507 (1971-10-01), Ootsuki et al.
patent: 3715780 (1973-02-01), Chaikin et al.
patent: 3748695 (1973-07-01), Shino et al.
patent: 3858278 (1975-01-01), Schmitt et al.

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