Patents by Inventor Vittorino Rizzotto

Vittorino Rizzotto 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).

  • Process and device for the continuous production of glass fiber reinforced sheets of thermoplastic polymers
    Patent number: 4487647
    Abstract: (1) A process for preparing thermoplastic polymer sheets reinforced with glass fibers, which comprises the successive steps of:(a) preparing a mat by fall of glass fibers onto a conveyor belt which moves at a speed lower than the fiber feeding speed;(b) preheating the mat to a temperature lower than the polymer melting temperature;(c) deposition on the mat, by fall, of a portion of the required polymer in powder;(d) compression of the mat;(e) deposition on the mat of another portion of the polymer in powder;(f) heating the mat to at least the softening temperature of the polymer;(g) deposition on the mat of the remaining polymer in powder;(h) compression of the mat and of the polymer at a temperature higher by at least 50.degree. C. than the polymer melting temperature with formation of a sheet.
    Type: Grant
    Filed: January 27, 1983
    Date of Patent: December 11, 1984
    Assignees: Vitrofil S.p.A., Montepolimeri S.p.A.
    Inventors: Gian L. Semeghini, Roberto Ferrari, Vittorino Rizzotto, Alberto Omacini, Carlo Rossi