Patents by Inventor Roberto Domenic Sicilia

Roberto Domenic Sicilia 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).

  • Multiple gating nozzle
    Patent number: 6276914
    Abstract: A method and apparatus for runnerless injection molding of plastic materials utilizing a novel valve stem for controlling the opening and closing of at least two gates in a single injection nozzle The method and apparatus includes at least two separate melt streams whose flows are not obstructed by the valve stem. These melt streams may contain the same plastic material or different plastic materials and the injection nozzle may be either simultaneously or sequentially activated for filling the mold cavity.
    Type: Grant
    Filed: August 27, 1999
    Date of Patent: August 21, 2001
    Assignee: Husky Injection Molding Systems Ltd.
    Inventor: Roberto Domenic Sicilia
  • Method of using a multiple gating nozzle
    Patent number: 5972258
    Abstract: A method and apparatus for runnerless injection molding of plastic materials utilizing a novel valve stem for controlling the opening and closing of at least two gates in a single injection nozzle. The method and apparatus includes at least two separate melt streams whose flows are not obstructed by the valve stem. These melt streams may contain the same plastic material or different plastic materials and the injection nozzle may be either simultaneously or sequentially activated for filling the mold cavity.
    Type: Grant
    Filed: October 20, 1997
    Date of Patent: October 26, 1999
    Assignee: Husky Injection Molding Systems Ltd.
    Inventor: Roberto Domenic Sicilia