Patents by Inventor Derek Skilling

Derek Skilling 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).

  • Cooling thermoplastic tubes
    Patent number: 4138458
    Abstract: Tubular film-forming system in which a tubular extrudate is rapidly cooled and the cooled tube is withdrawn by engagement with a movable fluid-shedding surface which firmly grips the tube without damaging the surface thereof. The system is particularly suitable for gripping a tube the surface of which is moistened by liquid from an annular cooling bath.
    Type: Grant
    Filed: July 18, 1977
    Date of Patent: February 6, 1979
    Assignee: Imperial Chemical Industries Limited
    Inventor: Derek Skilling
  • Cooling thermoplastics tubes
    Patent number: 4093412
    Abstract: Cooling an extruding thermoplastic tube by feeding the tube adjacent a cooling surface, maintaining a sheath of heat-transfer fluid between the tube and surface and preferentially cooling at least a selected area of the tube by transversely displacing the tube to decrease the thickness of the sheath between the selected area and the cooling surface. The invention is particularly suitable, for the production of thermoplastic films by orienting a cast tubular extrudate which has been cooled by means of an internal mandrel.
    Type: Grant
    Filed: September 23, 1976
    Date of Patent: June 6, 1978
    Assignee: Imperial Chemical Industries Limited
    Inventors: John Brian Davis, Derek Skilling, Nigel Edwin Wrigley
  • Production of tubular film
    Patent number: 4062916
    Abstract: Internal mandrel process and apparatus for the production of oriented tubular film in which rupture of the extruded tube by the pressure of inflating gas is prevented by means of a cup seal located between the mandrel and inflating zone, the cup seal being in peripheral engagement with the internal surface of the tube and presenting a substantially concave surface to the mandrel.
    Type: Grant
    Filed: February 13, 1976
    Date of Patent: December 13, 1977
    Assignee: Imperial Chemical Industries Limited
    Inventor: Derek Skilling
  • Cooling thermoplastic tubes
    Patent number: 3993723
    Abstract: Cooling an extruding thermoplastic tube by feeding the tube adjacent a cooling surface, maintaining a sheath of heat-transfer fluid between the tube and surface and preferentially cooling at least a selected area of the tube by transversely displacing the tube to decrease the thickness of the sheath between the selected area and the cooling surface. The invention is particularly suitable, for the production of thermoplastic films by orienting a cast tubular extrudate which has been cooled by means of an internal mandrel.
    Type: Grant
    Filed: June 17, 1974
    Date of Patent: November 23, 1976
    Assignee: Imperial Chemical Industries Limited
    Inventors: John Brian Davis, Derek Skilling, Nigel Edwin Wrigley
  • Apparatus for the production of tubular film
    Patent number: 3954360
    Abstract: Internal mandrel process and apparatus for the production of oriented tubular film in which rupture of the extruded tube by the pressure of inflating gas is prevented by means of a cup seal located between the mandrel and inflating zone, the cup seal being in peripheral engagement with the internal surface of the tube and presenting a substantially concave surface of the mandrel.
    Type: Grant
    Filed: August 14, 1974
    Date of Patent: May 4, 1976
    Assignee: Imperial Chemical Industries Limited
    Inventor: Derek Skilling