Method and apparatus for operating an open-end rotor...

Details Method and apparatus for operating an open-end rotor... Method and apparatus for operating an open-end rotor...

2006-09-26

2006-09-26

Hurley, Shaun R. (Department: 3765)

Textiles: spinning, twisting, and twining

Apparatus and processes

Open end spinning

C057S407000

Reexamination Certificate

active

07111446

ABSTRACT:
An open-end spinning unit, which comprises a spinning rotor1that rotates during the spinning operation at a high rotational speed in a closed rotor housing2.The spinning rotor is rotated by an individual electric motor drive18and supported in a smoothly running bearing assembly. When the drive is disconnected and the rotor housing is properly closed by a cover element8,the spinning rotor is biased and rotated by an airflow resulting from a vacuum prevailing in the rotor housing and the motor drive operates as a generator. At least one of the electric quantities Pv, Gvwhich develop during the generator operation of the drive18is monitored, and upon exceeding a threshold value which can only be attained when the cover element is properly closed, a signal S is generated and processed in a control unit30to cause the cover element8on the rotor housing2to be locked, and thereafter the drive18is connected to its electrical supply to rotate the rotor at high speed.

REFERENCES:
patent: 4094133 (1978-06-01), Furrer
patent: 5906092 (1999-05-01), Hattori
patent: 6590307 (2003-07-01), Coenen
patent: 2002/0002816 (2002-01-01), Coenen
patent: 2004/0000133 (2004-01-01), Wassenhoven et al.
patent: 2004/0154280 (2004-08-01), Wassenhoven
patent: 100 22 736 (2001-11-01), None
patent: 103 05 279 (2004-08-01), None

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