Patents by Inventor Cesar P. Sumar

Cesar P. Sumar has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Device for attachment to drawtwister machines to produce multifilament yarns with S or Z twist effect
    Patent number: 4562694
    Abstract: The present invention relates to the manufacture of textile multifilament yarns and, in particular, to a device for twisting multifilament yarns in conventional drawtwister machines. The device includes a pair of twisting rollers mounted to rotate freely on shafts, the axis of which are arranged with a substantial angle between them and in spaced apart and parallel planes. One twisting roll is a straight cylinder mounted on a fixed shaft whose axis is perpendicular to a supporting plate. The other is a frustrum with concave walls and a determined radius of curvature and is mounted on a shaft whose axis is parallel to the surface of the supporting plate.The supporting plate of the twisting device is installed on a surface of the drawtwister machine so that the shaft of the concave roll forms an angle of about 40.degree.-50.degree. relative to an imaginary line connecting the yarn fastening roller and the surface of the godet.
    Type: Grant
    Filed: July 7, 1983
    Date of Patent: January 7, 1986
    Inventor: Cesar P. Sumar