Patents by Inventor Donald Leo Elbert

Donald Leo Elbert 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).

  • Interference fit sleeved foam charge rolls and composite materials
    Patent number: 7680439
    Abstract: The present invention is generally directed to composite materials or charge rolls comprising a sleeved foam charge roll where the sleeve is interference-fit over the foam core, and methods of constructing them. The foam core can be made with an outer diameter larger than that of the sleeve inner diameter. The sleeve can be interference fit over the foam core to provide a functional charge roll. In some embodiments the charge roll can be used in an image forming apparatus including, but not limited to, an electrophotography system, an electrophotographic copying machine, and a laser printer.
    Type: Grant
    Filed: December 19, 2006
    Date of Patent: March 16, 2010
    Assignee: Lexmark International, Inc.
    Inventors: Donald Leo Elbert, Benjamin John Goebel, Claudia Alexandra Marin, Ronald Lloyd Roe
  • Interference Fit Sleeved Foam Charge Rolls and Composite Materials
    Publication number: 20080145591
    Abstract: The present invention is generally directed to composite materials or charge rolls comprising a sleeved foam charge roll where the sleeve is interference-fit over the foam core, and methods of constructing them. The foam core can be made with an outer diameter larger than that of the sleeve inner diameter. The sleeve can be interference fit over the foam core to provide a functional charge roll. In some embodiments the charge roll can be used in an image forming apparatus including, but not limited to, an electrophotography system, an electrophotographic coping machine, and a laser printer.
    Type: Application
    Filed: December 19, 2006
    Publication date: June 19, 2008
    Inventors: Donald Leo Elbert, Benjamin John Goebel, Claudia Alexandra Marin, Ronald Lloyd Roe
  • Polyurethane coatings and drive rollers including the same
    Patent number: 6954606
    Abstract: A drive roller having a polyurethane coating that has a coefficient of friction with respect to a belt effective to drive the belt over the operative life of the belt. The drive roller may be included in an image-forming device to drive a belt.
    Type: Grant
    Filed: April 18, 2003
    Date of Patent: October 11, 2005
    Assignee: Lexmark International, Inc.
    Inventors: Johnathan Lee Barnes, William Hargis Barton, Donald Leo Elbert, Kathryn Dowlen Mullins, Stacy Marie Pargett, Ronald Lloyd Roe
  • Polyurethane coatings and drive rollers including the same
    Publication number: 20040205967
    Abstract: A drive roller comprising a polyurethane coating having a coefficient of friction with respect to a belt effective to drive the belt over the operative life of the belt. The drive roller may be included in an image-forming device to drive a belt.
    Type: Application
    Filed: April 18, 2003
    Publication date: October 21, 2004
    Inventors: Johnathan Lee Barnes, William Hargis Barton, Donald Leo Elbert, Kathryn Dowlen Mullins, Stacy Marie Pargett, Ronald Lloyd Roe
  • Fuser system with greased belt
    Patent number: 6157806
    Abstract: Wear of the belt (1) of a belt fuser is minimized by use of a high viscosity lubricant of perfluoropolytrimethylene oxide grease between the inside of the belt and the heater element 6. To avoid damage of the belt at turn on, the belt is heated to a predetermined temperature before force is applied to move the belt.
    Type: Grant
    Filed: January 27, 2000
    Date of Patent: December 5, 2000
    Assignee: Lexmark International, Inc.
    Inventors: Donald Leo Elbert, Cory Nathan Hammond, Kevin Dean Schoedinger, Jerry Wayne Smith, Robert Glenn Smith