Patents by Inventor Robert Devidal

Robert Devidal has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Device and method for treating the inside surface of a plastic container with a narrow opening in a plasma enhanced process
    Patent number: 6376028
    Abstract: The described device is introduced into a plastic container with a narrow opening and serves a plasma enhanced process for treating the inside surface of the container. The device (2) extends between the container opening and the container bottom along the container axis (X) and comprising a gas feed tube (23) for feeding a process gas into the container and permanent magnets (24) for establishing a stationary magnetic field inside the container. The magnets (24) form a column of superimposed magnets which is arranged inside the gas feed tube (23). The north and south poles of each magnet are positioned on opposite sides of the container axis (X). The device may also comprise cooling means (25) for cooling the gas feed tube and the magnets.
    Type: Grant
    Filed: July 24, 2000
    Date of Patent: April 23, 2002
    Assignee: Tetra Laval Holdings & Finance S.A.
    Inventors: Jacques Laurent, Pierre Fayet, Robert Devidal