Patents Assigned to Bipel Limited
  • Moulding machines
    Patent number: 4521172
    Abstract: A moulding machine is provided with door means which are operable to define with external frame members of the machine a closed, air-tight chamber enclosing the moulding area of the machine. The frame members and/or spaces between them (other than a space which is in use closed by the door means) are rendered air-tight, if necessary.
    Type: Grant
    Filed: June 21, 1983
    Date of Patent: June 4, 1985
    Assignee: Bipel Limited
    Inventor: Barrie W. Gilbert