Patents Examined by Mathieu Vergot
  • Patent number: 5316717
    Abstract: A process for making gelatine films, in particular sheet gelatine, from powdered gelatine includes the following steps: The powdered gelatine with the addition of water is plasticized by the application of shearing forces at an elevated pressure and an elevated temperature, the plasticized mass is pressed in the form of a film through a slotted die, the film is drawn off the slotted die under tension and the taut film is dried.
    Type: Grant
    Filed: August 26, 1991
    Date of Patent: May 31, 1994
    Assignee: Deutsche Gelatine-Fabriken Stoess AG
    Inventors: Peter Koepff, Klaus Braumer, Helmuth Stahl, Eberhard Dick
  • Patent number: 4921673
    Abstract: A method of manufacture of pneumatic tires having a tread T with grooves therein in which the grooves are formed by use of cylindrical network grid 10. The grid 10 is filled with tread compound T, and is then located concentrically to surround a tire carcass assembly C to assemble the carcass to the tread. Other tire components such as sidewalls S are added to the carcass C with the grid in situ, and the assembled tire is then cured with grid in situ, the grid being subsequently stripped from the finished tire. Apparatus for above method include a tread mould body (23) having an inner mould surface (24) in which the closely fitting cylindrical network grid (10) is located. The grid (10) is separate from the mould body (23) and has at least one axial split therein to allow removal of the grid (10) from the finished tire.
    Type: Grant
    Filed: May 25, 1988
    Date of Patent: May 1, 1990
    Assignee: Apsley Metals Limited
    Inventors: Eric Holroyd, Colin Holroyd