Patents by Inventor John Michael Kniffin

John Michael Kniffin 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).

  • Patent number: 6557987
    Abstract: A fluid transport conduit for conveying ink-jet ink from a reservoir to a printhead in an ink-jet printer is provided. The fluid transport conduit comprises at least one inner layer, such as high density polyethylene, cyclic olefin copolymer, or polypropylene homopolymer, that is flexible and is a barrier to liquids, and at least one outer layer, such as nylon or polyvinyl alcohol, that is a barrier to air and is softer, or more compliant, than the inner layer, with the inner layer bonded to the outer layer. The two layers are advantageously co-extruded to form the fluid transport conduit.
    Type: Grant
    Filed: September 25, 2000
    Date of Patent: May 6, 2003
    Assignee: Hewlett-Packard Development Company, L.P.
    Inventors: Alan Shibata, Alan Biggs, Lap Thai Nguyen, John Michael Kniffin, Paul L. Nash, Yi Liu, Gerald A. Mello, Ah Chong Johnny Tee, Timothy A. Longust, Justin M. Roman
  • Patent number: 6491364
    Abstract: An inkjet printer for printing on a print medium includes a printhead having an ink orifice formed therein through which an ink drop is ejected into a print zone between the printhead and the print medium during printing, and an air movement system which directs a stream of gas through the print zone as the ink drop is ejected during printing. When ejected, the ink drop forms a head and a tail. As such, the stream of gas converges the tail of the ink drop and the head of the ink drop during printing so as to improve the shape of a dot formed by the ink drop on the print medium.
    Type: Grant
    Filed: April 27, 2001
    Date of Patent: December 10, 2002
    Assignee: Hewlett-Packard Company
    Inventors: Joe R. Pietrzyk (), Thomas Michael Sabo, John Michael Kniffin, Dustin Wesley Blair, Grant Allen Webster, Stephen William Bauer
  • Publication number: 20020158937
    Abstract: An inkjet printer for printing on a print medium includes a printhead having an ink orifice formed therein through which an ink drop is ejected into a print zone between the printhead and the print medium during printing, and an air movement system which directs a stream of gas through the print zone as the ink drop is ejected during printing. When ejected, the ink drop forms a head and a tail. As such, the stream of gas converges the tail of the ink drop and the head of the ink drop during printing so as to improve the shape of a dot formed by the ink drop on the print medium.
    Type: Application
    Filed: April 27, 2001
    Publication date: October 31, 2002
    Inventors: Joe R. Pietrzyk, Susan L. Pietrzyk, Thomas Michael Sabo, John Michael Kniffin, Dustin Wesley Blair, Grant Allen Webster, Stephen William Bauer