Patents by Inventor John J. Chiselko

John J. Chiselko 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).

  • Apparatus for additive feeding
    Patent number: 4155655
    Abstract: A method and apparatus for feeding an additive, such as glass fibers, fillers, etc., to a plastic resin in an extruder is disclosed. The additive is fed by means of a screw type feeder into the barrel of a plastics extruder or reciprocating screw plastifier at a location where the resin is molten and the resin pressure is low.
    Type: Grant
    Filed: December 21, 1976
    Date of Patent: May 22, 1979
    Assignee: Egan Machinery Company
    Inventors: John J. Chiselko, William H. Hulbert
  • Method for additive feeding
    Patent number: 4006209
    Abstract: A method and apparatus for feeding an additive, such as glass fibers, fillers, etc., to a plastic resin in an extruder is disclosed. The additive is fed by means of a screw type feeder into the barrel of a plastics extruder or reciprocating screw plastifier at a location where the resin is molten and the resin pressure is low.
    Type: Grant
    Filed: February 10, 1975
    Date of Patent: February 1, 1977
    Assignee: Egan Machinery Company
    Inventors: John J. Chiselko, William H. Hulbert