Patents by Inventor John Du Pont

John Du Pont 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).

  • Method and apparatus for sampling and inspecting ink for a printing press
    Patent number: 6289811
    Abstract: A sample of printing ink for a printing press is obtained using actual press components. An anilox roll for the press is supplied with ink and is rotated while the anilox roll is either mounted on the press or mounted off-line from the press. A printable substrate is printed with the ink either by pressing the substrate directly against the anilox roll or by pressing a transfer roll against the anilox roll and pressing the substrate against the transfer roll. The ink on the substrate is inspected, and any necessary changes to the ink are made before the press run is started.
    Type: Grant
    Filed: January 11, 2000
    Date of Patent: September 18, 2001
    Assignee: Paper Converting Machine Co.
    Inventor: John Du Pont