Patents Assigned to The Hanson Group Ltd.
  • Heated plastic flow control valve
    Patent number: 5012839
    Abstract: A heated plastic flow control valve assembly which is intended for use in controlling the flow of molten plastic to a mold in a molding press includes a spring biased slide valve that cooperates with a valve body to shut of plastic flow unless the slide valve is displaced against the spring. This displacement is caused by engagement of a plastic injection machine nozzle with the slide valve. Two separately controllable heaters are useable to provide two heat zones in the valve assembly.
    Type: Grant
    Filed: March 1, 1990
    Date of Patent: May 7, 1991
    Assignee: The Hanson Group Ltd.
    Inventors: David J. Rogers, Martin J. Broga