Patents by Inventor Ronald L. Roe
Ronald L. 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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Patent number: 7352988Abstract: A fuser member adapted to fuse toner onto the surface of a recording medium as the recording medium passes a nip area of the fuser member comprises a electrically conductive polymer layer, a resistive layer, and an electrically conductive layer. The fuser member further comprises a current supply element and a current return element, wherein the current supply element and the current return element are configured to provide current flow through the electrically conductive polymer layer and the resistive layer to generate fusing heat at the nip area.Type: GrantFiled: June 16, 2005Date of Patent: April 1, 2008Assignee: Lexmark International, Inc.Inventors: Bradley L. Beach, Ronald L. Roe, Jerry W. Smith
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Patent number: 7336919Abstract: A fuser member adapted to fuse toner onto the surface of a recording medium as the recording medium passes a nip area of the fuser member comprises a electrically conductive polymer layer, a resistive layer, an electrically conductive layer, a primer layer, and a release layer. The fuser member further comprises a current supply element and a current return element, wherein the current supply element and the current return element are configured to provide current flow through the electrically conductive polymer layer and the resistive layer to generate fusing heat at the nip area.Type: GrantFiled: June 16, 2005Date of Patent: February 26, 2008Assignee: Lexmark International, Inc.Inventors: Bradley L. Beach, Ronald L. Roe, Jerry W. Smith
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Patent number: 7292815Abstract: A fuser member adapted to fuse toner onto the surface of a recording medium as the recording medium passes a nip area of the fuser member comprises a electrically conductive polymer layer, a resistive layer, and an electrically conductive layer. The fuser member further comprises a current supply roll and a current return roll, wherein the current supply roll and the current return roll are configured to provide current flow through the electrically conductive polymer layer and the resistive layer to generate fusing heat at the nip area.Type: GrantFiled: June 16, 2005Date of Patent: November 6, 2007Assignee: Lexmark International, Inc.Inventors: Bradley L. Beach, Ronald L. Roe, Scott S. Wu
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Patent number: 7034097Abstract: Polyurethane elastomers are formed from first and second graft curatives, each graft curative having a molecular weight of at least about 800, wherein the first and second graft curatives are substantially immiscible with one another, and wherein the polyurethane elastomer exhibits a hardness of less than about 40 Shore A according to ASTM D2240-86 and a compression set of less than about 8% according to ASTM D395-89, method B, at a temperature of about 70° C. for about 22 hours. Rolls are manufactured using such polyurethane elastomers, particularly rolls that are suitable for use in image forming devices, such as electrophotographic print applications.Type: GrantFiled: January 13, 2004Date of Patent: April 25, 2006Assignee: Lexmark International, Inc.Inventors: Bradley L. Beach, Bhaskar Gopalanarayanan, Kelly A. Killeen, Johnny D. Massie, II, Ronald L. Roe
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Patent number: 6689528Abstract: Heat rolls and fuser belts utilized in the fusing step of the electrophotographic process are disclosed. These belts and rollers eliminate toner offset while still maintaining excellent release characteristics of the printed page from the fuser. The heat rolls comprise a core member having coated thereon a plurality of concentric layers, wherein at least one of said layers (preferably the top layer) does not contain electrically conductive materials and wherein the roll exhibits electrical breakdown at about 250 volts or less. The fuser belts comprise a heat resistant resin substrate (such as a polyimide belt) carrying thereon a plurality of layers coating the outer surface of said belt, wherein at least one of said layers (preferably the top layer) does not contain electrically conductive materials and wherein the belt exhibits electrical breakdown at about 250 volts or less.Type: GrantFiled: March 27, 2003Date of Patent: February 10, 2004Assignee: Lexmark International, Inc.Inventors: Gregory L. Ream, Ronald L. Roe, Bradley L. Beach, Steven A. Curry
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Publication number: 20030190470Abstract: Heat rolls and fuser belts utilized in the fusing step of the electrophotographic process are disclosed. These belts and rollers eliminate toner offset while still maintaining excellent release characteristics of the printed page from the fuser. The heat rolls comprise a core member having coated thereon a plurality of concentric layers, wherein at least one of said layers (preferably the top layer) does not contain electrically conductive materials and wherein the roll exhibits electrical breakdown at about 250 volts or less. The fuser belts comprise a heat resistant resin substrate (such as a polyimide belt) carrying thereon a plurality of layers coating the outer surface of said belt, wherein at least one of said layers (preferably the top layer) does not contain electrically conductive materials and wherein the belt exhibits electrical breakdown at about 250 volts or less.Type: ApplicationFiled: March 27, 2003Publication date: October 9, 2003Inventors: Gregory L. Ream, Ronald L. Roe, Bradley L. Beach, Steven A. Curry
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Publication number: 20010044025Abstract: Heat rolls and fuser belts utilized in the fusing step of the electrophotographic process are disclosed. These belts and rollers eliminate toner offset while still maintaining excellent release characteristics of the printed page from the fuser. The heat rolls comprise a core member having coated thereon a plurality of concentric layers, wherein at least one of said layers (preferably the top layer) does not contain electrically conductive materials and wherein the roll exhibits electrical breakdown at about 250 volts or less. The fuser belts comprise a heat resistant resin substrate (such as a polyimide belt) carrying thereon a plurality of layers coating the outer surface of said belt, wherein at least one of said layers (preferably the top layer) does not contain electrically conductive materials and wherein the belt exhibits electrical breakdown at about 250 volts or less.Type: ApplicationFiled: June 19, 2001Publication date: November 22, 2001Inventors: Gregory L. Ream, Ronald L. Roe, Bradley L. Beach, Steven A. Curry
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Patent number: 6284373Abstract: Heat rolls and fuser belts utilized in the fusing step of the electrophotographic process are disclosed. These belts and rollers eliminate toner offset while still maintaining excellent release characteristics of the printed page from the fuser. The heat rolls comprise a core member having coated thereon a plurality of concentric layers, wherein at least one of said layers (preferably the top layer) does not contain electrically conductive materials and wherein the roll exhibits electrical breakdown at about 250 volts or less. The fuser belts comprise a heat resistant resin substrate (such as a polyimide belt) carrying thereon a plurality of layers coating the outer surface of said belt, wherein at least one of said layers (preferably the top layer) does not contain electrically conductive materials and wherein the belt exhibits electrical breakdown at about 250 volts or less.Type: GrantFiled: September 10, 1999Date of Patent: September 4, 2001Assignee: Lexmark International, Inc.Inventors: Gregory L. Ream, Ronald L. Roe, Bradley L. Beach, Steven A. Curry
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Patent number: 5637391Abstract: Rubber charge roller cores are coated with styrene acrylic powder. Excess powder is removed, and the rollers are used in normal operation without the usual permanent outer layer. The more complex and costly outer layer of nylon is eliminated. Dust resulting from normal operation replaces the original powder coating.Type: GrantFiled: October 10, 1995Date of Patent: June 10, 1997Assignee: Lexmark International, Inc.Inventors: Curt J. Claflin, John Y. Kim, George P. Marshall, Ronald L. Roe, Donald W. Stafford
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Patent number: 5406356Abstract: An electrophotographic device (1) in which a photoconductor drum (3) is charged by a charging roller (5). Insulating liquid (19, 30) is applied at their initial nip. The charging roller both charges and squeegees largely dry the photoconductor member. The liquid (19) may be produced by incomplete cleaning by a cleaning blade (21). Excess liquid is collected at the sides.This results in reduction in foreign gasses, and reduction in the operating potential between photoconductor drum and charging roller.Type: GrantFiled: August 9, 1993Date of Patent: April 11, 1995Assignee: Lexmark International, Inc.Inventors: Alan S. Campbell, Curt J. Claflin, Randy L. Fagerquist, Tracy G. Floyd, Brenda M. Kelly, Ronald L. Roe, Eric L. Ziercher
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Patent number: 5365315Abstract: The charging roller (42) and push plates (44) are spring mounted to the lid (36) of the printer. When the lid is closed, the plates push plungers (11) down to rotate crank arms (23), which open a shutter (7) in electrophotographic cartridge (1). This holds the cartridge in place and provides both a resilient, protective cushion for the cartridge and a pop-up action to the lid.Type: GrantFiled: July 29, 1993Date of Patent: November 15, 1994Assignee: Lexmark International, Inc.Inventors: Ronald W. Baker, Robert L. Burdick, Martin V. DiGirolamo, Paul D. Horrall, Larry J. Rice, Ronald L. Roe, Earl D. Ward, II, Bernard L. Wilzbach
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Patent number: 5248560Abstract: A semiconductive developer roll is disclosed having a conductive shaft and a single outer member of polyester urethane in which copper (II) chloride is dissolved. Performance is enhanced by the addition of some silicone oil.Type: GrantFiled: May 7, 1992Date of Patent: September 28, 1993Assignee: Lexmark International, Inc.Inventors: Ronald W. Baker, Bradley L. Beach, Ronald L. Roe, Donald W. Stafford