Patents Assigned to Helverep S.A.
  • Method for recovering a synthetic waste material contaminated with other materials
    Patent number: 5464877
    Abstract: A method for recovering a synthetic waste material contaminated with other materials, particularly waste optical disks, wherein the loose, uncrushed waste is chemically treated by impregnating said other materials with a chemical solution which attacks these materials but is substantially neutral for the synthetic material, and mechanically treated by tumbling said waste in a sealed rotary drum to dislodge the contaminated and chemically attacked materials from said synthetic material.
    Type: Grant
    Filed: March 24, 1994
    Date of Patent: November 7, 1995
    Assignee: Helverep S.A.
    Inventor: Francois-Marie Franci