Method and apparatus for driving an open-end spinning rotor duri

Details Method and apparatus for driving an open-end spinning rotor duri Method and apparatus for driving an open-end spinning rotor duri

1995-01-26

1996-12-17

Stryjewski, William

Textiles: spinning, twisting, and twining

Apparatus and processes

Piecing up

57 94, 57105, 57264, 57405, 57406, D01H 1326, D01H 1300

Patent

active

055841708

ABSTRACT:
In the case of a method for closed-loop controlling the revolutions of an open-end spinning rotor during automatic piecing, the spinning rotor is run up to its operating speed from a standstill by being coupled to a tangential drive belt, which runs at operating speed. The spinning rotor thereby passes through a suitable speed range for piecing, and is kept at this speed range for a predetermined time span by changes in the driving effect of the tangential drive belt. This occurs in that the revolutions of the spinning rotor are measured, and dependent on these readings, the revolutions are closed-loop controlled by device of reducing and increasing the driving effect, for example by device of intermittent activating of the rotor brake.

REFERENCES:
patent: 3780513 (1973-12-01), Watanabe et al.
patent: 4172357 (1979-10-01), Stahlecker et al.
patent: 4893462 (1990-01-01), Braun et al.
patent: 5184452 (1993-02-01), Stahlecker et al.

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