Patents by Inventor Johnathan Lee Barnes

Johnathan Lee Barnes 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).

  • Toner mass control by surface roughness and voids
    Patent number: 8500616
    Abstract: The present disclosure relates to controlling a performance characteristic of an image forming device component having a surface which may include removal of a portion of the surface to expose a plurality of voids and a surface between the voids. The surface between the voids may have a surface roughness Ra in the range of 0.1 to 5.0 microns and the relationship SAV/(SAV+SAC) is equal to 1-50%, where SAV is the surface area of the voids and SAC is the remaining surface area of the component. The performance characteristic may include the control of toner mass conveyed and/or toner filming and/or the amount of residual toner removed from a photoconductive surface.
    Type: Grant
    Filed: October 9, 2007
    Date of Patent: August 6, 2013
    Assignee: Lexmark International, Inc.
    Inventors: Johnathan Lee Barnes, Jeannette Quinn Bracken, Sudha Chopra, Jeremy Lavern Daum, Gerald Lee Fish, Bhaskar Gopalanarayanan, Leea Danielle Haarz, Ronald Lloyd Roe, Matthew Joe Russell, James Joseph Semler, Todd Joseph Svoboda
  • Toner Mass Control by Surface Roughness and Voids
    Publication number: 20090092420
    Abstract: The present disclosure relates to controlling a performance characteristic of an image forming device component having a surface which may include removal of a portion of the surface to expose a plurality of voids and a surface between the voids. The surface between the voids may have a surface roughness Ra in the range of 0.1 to 5.0 microns and the relationship SAV/(SAV+SAC) is equal to 1-50%, where SAV is the surface area of the voids and SAC is the remaining surface area of the component. The performance characteristic may include the control of toner mass conveyed and/or toner filming and/or the amount of residual toner removed from a photoconductive surface.
    Type: Application
    Filed: October 9, 2007
    Publication date: April 9, 2009
    Inventors: Johnathan Lee Barnes, Jeanette Quinn Bracken, Sudha Chopra, Jeremy Lavern Daum, Gerald Lee Fish, Bhaskar Gopalanarayanan, Leea Danielle Haarz, Ronald Lloyd Roe, Matthew Joe Russell, James Joseph Semler, Todd Joseph Svoboda
  • 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
  • Method of dip coating fuser belt using alcohol as a co-solvent
    Patent number: 6511709
    Abstract: A process for dip coating, particularly vertical dip coating, the topcoat layer onto fuser belts used in electrophotographic processes is disclosed. In this process, a C1-C4 alkanol, such as isopropyl alcohol is added to the solvent system for the fluorocarbon topcoat layer. The use of alcohols in this way provides an efficient and effective method and a topcoat layer which is smooth, uniform and has a good finish.
    Type: Grant
    Filed: August 15, 2001
    Date of Patent: January 28, 2003
    Assignee: Lexmark, International, Inc.
    Inventors: Johnathan Lee Barnes, Scott Moreland Broce, James Craig Minor, Jennifer Kaye Neely, Dat Quoc Nguyen, Kasturi Rangan Srinivasan, Mark Stephen Weisman, Jr.