Patents by Inventor Gianvittore Valent

Gianvittore Valent 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).

  • Method to separate polypropylene in the processing of silk and device to separate polypropylene which employs such method
    Patent number: 5305497
    Abstract: Method to separate polypropylene in the processing of silk schappe, whereby a lap (14) of silk fibers which are partly combed or are at least made sufficiently parallel undergoes an action of heating between 110.degree. C. and 160.degree. C. together with a simultaneous action of controlled compression so as to form clusters of polypropylene and silk fibers and thereafter an action of combing or pre-combing for the definitive removal of those clusters of polypropylene and silk fibers.Device to separate polypropylene in the processing of silk schappe, which is positioned downstream of a drawing frame (13) or analogous machine producing a lap (14) of silk fibers, the device including a conveyor means (belt/drum) cooperating with means that heat and apply adjustable pressure to the lap (14).
    Type: Grant
    Filed: November 13, 1992
    Date of Patent: April 26, 1994
    Assignee: Cascami Seta-Filature Seriche Riunite SpA
    Inventors: Cesare Liverani, Gianvittore Valent, Paolo Viciguerra