Patents Assigned to Keller & C. Aktiengesellschaft
  • Method for reinforcing the edge region of a plate formed of a porous material by means of a reinforcement agent
    Patent number: 4133920
    Abstract: A method of reinforcing an edge region of a plate formed of a porous material by means of a reinforcement agent wherein the plate is immersed in a bath containing a reinforcement agent. Air contained in the plate is withdrawn at least from one plate surface. Both plate surfaces prior to the immersion of the plate in the bath are covered so as to be protected against contact by the reinforcement agent.
    Type: Grant
    Filed: March 2, 1976
    Date of Patent: January 9, 1979
    Assignee: Keller & C. Aktiengesellschaft
    Inventor: Hans Schulthess