Patents Assigned to Kaiser Electro Refractaire France
  • Process for the manufacture of gate valves for closure devices having a pouring nozzle and similar objects
    Patent number: 4248815
    Abstract: In order to manufacture a casting nozzle plate assembly, e.g., a sliding closure of a slide plate and collector nozzle, without having to further machine the working surface of one assembly a mold is arranged on a trued slab. A refractory concrete is poured into the mold while the mold is vibrated. The concrete is allowed to harden before being separated from trued slab. The resulting assembly has a smooth work (e.g., sliding) surface for contact with another element.
    Type: Grant
    Filed: February 6, 1979
    Date of Patent: February 3, 1981
    Assignee: Kaiser Electro Refractaire France
    Inventors: James B. Blackburn, Jean L. Randon