Patents by Inventor Ronald Lloyd Roe
Ronald Lloyd Roe 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).
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Publication number: 20130243500Abstract: An endless electrophotographic member, such as a developer roller, which indicates an improved resistance to nip banding. The improvement to nip banding may be provided by the use of an organic salt within a roller surface region. The roller may provide, at a nip location, a resistive surface layer having an electrical resistance that avoids the development of nip banding and relatively dark regions on printed media.Type: ApplicationFiled: April 25, 2013Publication date: September 19, 2013Applicant: Lexmark International, Inc.Inventors: Mark Duane Foster, Kevin Scott Kennedy, Kelly Ann Killeen, Chao Li, Ronald Lloyd Roe, Richard Nicholas Schrantz, JR., Scott Alan Searls, Robert Francis Soto, Donald Wayne Stafford
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Patent number: 8522438Abstract: A method for making a developer roll by molding a metal shaft with a conductive or semi-conductive soft rubber forming a rubber core and a coating deposited on the soft rubber core wherein the coating has a conductive agent. The outer surface of the soft rubber core is modified to form an —OH rich surface layer before the coating is deposited onto the outer surface of the rubber core to chemically bond therein.Type: GrantFiled: December 18, 2012Date of Patent: September 3, 2013Assignee: Lexmark International, Inc.Inventors: Bhaskar Gopalanarayanan, Kelly Ann Killeen, Johnny Dale Massie, II, Ronald Lloyd Roe, James Joseph Semler
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Patent number: 8500616Abstract: 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: GrantFiled: October 9, 2007Date of Patent: August 6, 2013Assignee: 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
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Patent number: 8448336Abstract: An endless electrophotographic member, such as a developer roller, which indicates an improved resistance to nip banding. The improvement to nip banding may be provided by the use of an organic salt within a roller surface region. The roller may provide, at a nip location, a resistive surface layer having an electrical resistance that avoids the development of nip banding and relatively dark regions on printed media.Type: GrantFiled: July 3, 2008Date of Patent: May 28, 2013Assignee: Lexmark International, Inc.Inventors: Jane Elece Barcelo, Bradley Leonard Beach, Liam Ruan De Paor, Mark Duane Foster, Terence Edward Franey, Bhaskar Gopalanarayanan, Kevin Scott Kennedy, Kelly Ann Killeen, Chao Li, Jean Marie Massie, Ronald Lloyd Roe, Richard Nicholas Schrantz, Jr., Scott Alan Searls, Robert Francis Soto, Donald Wayne Stafford
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Patent number: 8398532Abstract: Developer roll having a conductive or semi-conductive soft rubber core and a coating deposited in the soft rubber core wherein the coating has a conductive agent. The outer surface of the soft rubber core is modified before the coating is deposited onto the outer surface of the soft rubber core. Methods for making the same.Type: GrantFiled: March 7, 2007Date of Patent: March 19, 2013Assignee: Lexmark International, Inc.Inventors: Bhaskar Gopalanarayanan, Kelly Ann Killeen, Johnny Dale Massie, II, Ronald Lloyd Roe, James Joseph Semler
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Patent number: 8180269Abstract: A fuser roll adapted to fuse toner on the surface of a recording medium is disclosed. The fuser roll includes a non-metallic core having an outer surface, and a resistive heating element covering at least a portion of the outer surface of the core. A current transmitter is provided for transmitting a current to said resistive heating element, and an insulation layer is provided for covering at least a portion of said resistive heating element. A toner release layer is provided for covering at least a portion of said insulation layer.Type: GrantFiled: November 14, 2008Date of Patent: May 15, 2012Assignee: Lexmark International, Inc.Inventors: Bradley Leonard Beach, Jichang Cao, Ronald Lloyd Roe, Jerry Wayne Smith, Scott Shiaoshin Wu
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Patent number: 8038591Abstract: The present disclosure relates to an image forming device component that includes an elastomeric material having a surface and a triboelectric charging material that may be exposed on the elastomeric material surface. The triboelectric material may be exposed by a finishing process that results in removal of a portion of the material leaving voids in the surface. The surface may have a surface roughness in the range of about 0.1 to 5.0 Ra. The component may include a developer roller in an electrophotograhic printer and may provide contact electrification to a given toner during a printing operation.Type: GrantFiled: March 27, 2007Date of Patent: October 18, 2011Assignee: Lexmark International, Inc.Inventors: Jonathan Lee Barnes, Jenny Marie Berens, Bhaskar Gopalanarayanan, Jason Edward Gordon, David Starling MacMillan, Gregory Lawrence Ream, Ronald Lloyd Roe
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Publication number: 20100155677Abstract: The present disclosure relates to an image forming component. The component may include a urethane body, comprising polydiene containing a residual double bond available for oxidation, and including a surface, wherein said double bond is oxidized. The component may also include a first conductive additive including an alkali metal salt, wherein the first conductive additive catalyzes the oxidation of the polydiene and a second conductive additive including an inert conductive additive that does not catalyze the polydiene oxidation, wherein the image forming component exhibits a surface resistivity in the range of 1.0×109 to 1.0×1012 ohm-cm, when characterized at 15.6° C. and 20% RH.Type: ApplicationFiled: December 22, 2008Publication date: June 24, 2010Inventors: Bradley Leonard Beach, Kelly Ann Killeen, Ronald Lloyd Roe
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Publication number: 20100124448Abstract: A fuser roll adapted to fuse toner on the surface of a recording medium is disclosed. The fuser roll includes a non-metallic core having an outer surface, and a resistive heating element covering at least a portion of the outer surface of the core. A current transmitter is provided for transmitting a current to said resistive heating element, and an insulation layer is provided for covering at least a portion of said resistive heating element. A toner release layer is provided for covering at least a portion of said insulation layer.Type: ApplicationFiled: November 14, 2008Publication date: May 20, 2010Inventors: Bradley Leonard Beach, Jichang Cao, Ronald Lloyd Roe, Jerry Wayne Smith, Scott Shiaoshin Wu
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Patent number: 7680439Abstract: 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: GrantFiled: December 19, 2006Date of Patent: March 16, 2010Assignee: Lexmark International, Inc.Inventors: Donald Leo Elbert, Benjamin John Goebel, Claudia Alexandra Marin, Ronald Lloyd Roe
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Publication number: 20100003610Abstract: An endless electrophotographic member, such as a developer roller, which indicates an improved resistance to nip banding. The improvement to nip banding may be provided by the use of an organic salt within a roller surface region. The roller may provide, at a nip location, a resistive surface layer having an electrical resistance that avoids the development of nip banding and relatively dark regions on printed media.Type: ApplicationFiled: July 3, 2008Publication date: January 7, 2010Inventors: Jane Elece Barcelo, Bradley Leonard Beach, Liam Ruan De Paor, Mark Duane Foster, Terence Edward Franey, Bhaskar Gopalanarayanan, Kevin Scott Kennedy, Kelly Ann Killeen, Chao Li, Jean Marie Massie, Ronald Lloyd Roe, Richard Nicholas Schrantz, JR., Scott Alan Searls, Robert Francis Soto, Donald Wayne Stafford
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Publication number: 20090092420Abstract: 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: ApplicationFiled: October 9, 2007Publication date: April 9, 2009Inventors: 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
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Publication number: 20080240810Abstract: The present disclosure relates to an image forming device component that includes an elastomeric material having a surface and a triboelectric charging material that may be exposed on the elastomeric material surface. The triboelectric material may be exposed by a finishing process that results in removal of a portion of the material leaving voids in the surface. The surface may have a surface roughness in the range of about 0.1 to 5.0 Ra. The component may include a developer roller in an electrophotograhic printer and may provide contact electrification to a given toner during a printing operation.Type: ApplicationFiled: March 27, 2007Publication date: October 2, 2008Inventors: Jonathan Lee Barnes, Jenny Marie Berens, Bhaskar Gopalanarayanan, Jason Edward Gordon, David Starling MacMillan, Gregory Lawrence Ream, Ronald Lloyd Roe
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Publication number: 20080219713Abstract: Developer roll having a conductive or semi-conductive soft rubber core and a coating deposited in the soft rubber core wherein the coating has a conductive agent. The outer surface of the soft rubber core is modified before the coating is deposited onto the outer surface of the soft rubber core. Methods for making the same.Type: ApplicationFiled: March 7, 2007Publication date: September 11, 2008Inventors: Bhaskar Gopalanarayanan, Kelly Ann Killeen, Johnny Dale Massie, Ronald Lloyd Roe, James Joseph Semler
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Publication number: 20080145591Abstract: 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: ApplicationFiled: December 19, 2006Publication date: June 19, 2008Inventors: Donald Leo Elbert, Benjamin John Goebel, Claudia Alexandra Marin, Ronald Lloyd Roe
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Patent number: 6970672Abstract: A toner layer regulating system for an electrophotographic image forming apparatus includes a toner carrier; a toner regulating member supported in cantilevered fashion against the toner carrier so as to form a toner nip therebetween comprising a flexible metallic substrate having a coating covering at least an area forming the nip; wherein the coating comprises at least a matrix of a base polymer and a plurality of fine particles having a particle size of 0.1 microns to thirty microns; wherein the coating has a thickness of approximately one hundred fifty microns or less; wherein the coating has a surface roughness in the range of 0.15 to 1.5 microns Ra and in the range of 1 to 15 microns Rz. A carrier stratum may be disposed between the coating and the substrate, and the coating may be single layer or have a plurality of layers.Type: GrantFiled: March 25, 2004Date of Patent: November 29, 2005Assignee: Lexmark International, Inc.Inventors: David Starling MacMillan, Vernon Wayne Ulrich, Jarrett C. Gayne, Scott Richard Castle, Ligia Aura Bejat, Ronald Lloyd Roe, Bhaskar Gopalanarayanan
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Patent number: 6954606Abstract: 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: GrantFiled: April 18, 2003Date of Patent: October 11, 2005Assignee: Lexmark International, Inc.Inventors: Johnathan Lee Barnes, William Hargis Barton, Donald Leo Elbert, Kathryn Dowlen Mullins, Stacy Marie Pargett, Ronald Lloyd Roe
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Patent number: 6818290Abstract: This invention comprises a fuser belt (1) of polyimide incorporating surface-oxidized boron nitride. The resulting enhanced flexibility provides continuing strength without physical damage during use of the belt in a belt fuser while thermal conductivity is preserved. The extent of flexibility enhancement observed is dependent on the degree of oxidation. Therefore, oxidation temperature and time of oxidation are key variables that are used to control the degree of oxidation and thereby the resulting improvement in the flex fatigue.Type: GrantFiled: September 29, 2003Date of Patent: November 16, 2004Assignee: Lexmark International, Inc.Inventors: Sudha Chopra, Ronald Lloyd Roe, Mark Stephen Weisman, Jr.
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Publication number: 20040205967Abstract: 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: ApplicationFiled: April 18, 2003Publication date: October 21, 2004Inventors: Johnathan Lee Barnes, William Hargis Barton, Donald Leo Elbert, Kathryn Dowlen Mullins, Stacy Marie Pargett, Ronald Lloyd Roe
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Patent number: 6709096Abstract: A layered intermediate used in inkjet printing contains a release coat formed on a transfer medium in an area where an image has not been printed. The release coat is formed of polyvinyl pyrrolidone (PVP) or a PVP copolymer and at least one solvent selected from the group consisting of glycol solvents and diol solvents. A viscous coating of PVP or the PVP copolymer is formed on the transfer medium in an area where an image has been printed. A release layer formed from components in the release coat and components in the ink is formed on the viscous coating. A first ink layer is formed on the release layer of flocculated ink. A second ink layer is formed on the first ink layer, of ink that is substantially not flocculated.Type: GrantFiled: November 15, 2002Date of Patent: March 23, 2004Assignee: Lexmark International, Inc.Inventors: Bradley Leonard Beach, Ligia Aura Bejat, Gerald Lee Fish, Philip Jerome Heink, David Starling MacMillan, Jean Marie Massie, Peter Brown Pickett, Ronald Lloyd Roe, Sean David Smith