Patents by Inventor Robert Stoolmaker

Robert Stoolmaker 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).

  • Pinch bar and parison separation method
    Patent number: 7384260
    Abstract: A parison pinching and separating system for attaching to first and second mold halves is disclosed. Each mold half has first and second cavities. The system includes a first pinch bar for attaching to the first cavity of the first mold half, a first pinch bar for attaching to the second cavity of the first mold half, a second pinch bar for attaching to the first cavity of the second mold half, and a second pinch bar for attaching to the second cavity of the second mold half. Each pinch bar has a surface and a protrusion that extends from the surface. The protrusions of the pinch bars associated with first cavity are positioned for pinching a parison when the first and second mold halves close. The protrusion associated with the second cavity are positioned for pinching a parison when the first and second mold halves close.
    Type: Grant
    Filed: November 12, 2003
    Date of Patent: June 10, 2008
    Assignee: Graham Packaging Company, L.P.
    Inventors: Dave Humphreys, Earle Ellis, William Richer, Robert Stoolmaker
  • Pinch bar and parison separation method
    Publication number: 20050098922
    Abstract: A parison pinching and separating system for attaching to first and second mold halves is disclosed. Each mold half has first and second cavities. The system includes a first pinch bar for attaching to the first cavity of the first mold half, a first pinch bar for attaching to the second cavity of the first mold half, a second pinch bar for attaching to the first cavity of the second mold half, and a second pinch bar for attaching to the second cavity of the second mold half. Each pinch bar has a surface and a protrusion that extends from the surface. The protrusions of the pinch bars associated with first cavity are positioned for pinching a parison when the first and second mold halves close. The protrusion associated with the second cavity are positioned for pinching a parison when the first and second mold halves close.
    Type: Application
    Filed: November 12, 2003
    Publication date: May 12, 2005
    Applicant: Graham Packaging Company, L.P.
    Inventors: Dave Humphreys, Earle Ellis, William Richer, Robert Stoolmaker