Patents Assigned to Cebal GP
  • Method for hermetically sealing a rigid panel
    Patent number: 3963814
    Abstract: This invention is addressed to a new and improved method for sealing an opening in a rigid panel in which first and second sealing members are inserted into the opening in the rigid panel, and subjected to a first lateral mechanical tension, the members are then heated, preferably by ultrasonic heating means and then the members are subjected to a second mechanical tension.
    Type: Grant
    Filed: June 23, 1975
    Date of Patent: June 15, 1976
    Assignee: Cebal GP
    Inventors: Jean Cospen, Bernard Baumann