Title: Method and apparatus for driving and piecing-up open-end spinning units

Abstract: The present invention relates to a method and an apparatus for changing the ratio of the yarn taking-up speed to the number of revolutions of the rotor at the time of yarn piecing and normal spinning. According to the present invention, the ratio of the yarn taking-out speed to the number of revolutions of the rotor at the time of yarn piecing has a different value from that employed at the normal spinning, while the ratio of the yarn taking-out speed to the sliver supply speed is made constant at the time of yarn piecing as at the normal spinning, in a manner such that the spun yarn has fewer number of twists at the normal spinning than that at the time of yarn piecing. The rotor speed may also be simultaneously reduced as the speeds of the take-out and sliver supply are reduced.

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Inventors: Honjo, Takeshige (Suita, JP)

Application Number: 538589
Filing Date: 1975-01-06
Publication_date: 1979-08-07
Assignee: Murata Kikai Kabushiki Kaisha (JP)
Primary Class(es): 57/93 57/100, 57/105, 57/263, 57/405, 57/406
Other Classes:
US Patent Ref:

3704579	Dec, 1972	Tooka et al.	57/93.
3780513	Dec, 1973	Wanatabe et al.	57/93.
3810352	May, 1974	Miyazaki et al.	57/58.

Other Refs:
Primary Examiner: Gorenstein, Charles
Assistant Examiner:
Attorney: Whittemore, Hulbert & Belknap