Patents Assigned to Phoenix Technologies, L.P.
  • Method for cooling post reactor polyethylene terephthalate flakes
    Patent number: 6825311
    Abstract: A process for cooling post solid-stating reactor PET flakes comprises conveying PET flakes from a solid-stating reactor to a first separator in the presence of air and water at an elevated pressure, separating the steam from the partially cooled PET flakes, and conveying the partially cooled PET flakes from the first separator to a second separator in the presence of air at an elevated pressure.
    Type: Grant
    Filed: August 6, 2002
    Date of Patent: November 30, 2004
    Assignee: Phoenix Technologies, L.P.
    Inventors: Dennis C. Balduff, Henry A. Schworm
  • Granulator
    Patent number: 6749138
    Abstract: A granulator for reducing the size of plastic particles to facilitate the removal of contaminants therefrom. The granulator includes an upper chamber and a lower chamber defined by an exit screen. The upper chamber includes a rotary shear and an air handling system for creating a pressure drop across the screen to facilitate the transit of particulate material therethrough.
    Type: Grant
    Filed: March 5, 2002
    Date of Patent: June 15, 2004
    Assignee: Phoenix Technologies, L.P.
    Inventors: Thomas S. Hart, Jack L. Ritchie
  • Process for preparing value-added RPET-containing polymer blend component
    Patent number: 6734234
    Abstract: A process for preparing an RPET polymer blend component comprises providing a quantity of RPET flakes, comminuting the RPET flakes to prepare RPET particles having an average mean particle size from about 500 microns to about 5 microns, adding at least one specialty additive to the RPET particles, and mixing the RPET particles and specialty additive, to prepare a homogeneous blend of RPET carrier and specialty additive.
    Type: Grant
    Filed: March 11, 2003
    Date of Patent: May 11, 2004
    Assignee: Phoenix Technologies, L.P.
    Inventor: L. Robert Deardurff