Patents by Inventor Tanya Yvonne Thames
Tanya Yvonne Thames 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: 20160363876Abstract: An overcoat layer and method to make an overcoated photoconductor drum of an electrophotographic image forming device using irradiation such as with electron beam (EB) or ultraviolet (UV) light is provided. The photoconductor drum is then cured using EB dose of between 10 and 100 kiloGrays (kGy), preferably between 20 and 40 kGys or UV irradiation with an exposure of between 0.1 and 2 J/cm2. The unique overcoat layer of the present invention is formed having a biphasic morphology comprised of a highly cured crosslinked phase and a second phase enriched in uncured material. The desired amount of uncured uncrosslinked material found in the second phase of the biphasic structure, is between 2-70 wt % range, with particularly good combination of long-life and electrical performance when present at the 5-50 wt % level, and the best performance at the 15-40 wt % level.Type: ApplicationFiled: August 23, 2016Publication date: December 15, 2016Inventors: MARK THOMAS BELLINO, GERALD HUGH CIECIOR, DOUGLAS JEFFREY HARRIS, WEIMEI LUO, BRIAN DAVID MUNSON, DAT QUOC NGUYEN, SCOTT DANIEL REEVES, TANYA YVONNE THAMES
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Publication number: 20160357119Abstract: An overcoat layer and method to make an overcoated photoconductor drum of an electrophotographic image forming device using irradiation such as with electron beam (EB) or ultraviolet (UV) light is provided. The photoconductor drum is then cured using EB dose of between 10 and 100 kiloGrays (kGy), preferably between 20 and 40 kGys or UV irradiation with an exposure of between 0.1 and 2 J/cm2. The unique overcoat layer of the present invention is formed having a biphasic morphology comprised of a highly cured crosslinked phase and a second phase enriched in uncured material. The desired amount of uncured uncrosslinked material found in the second phase of the biphasic structure, is between 2-70 wt % range, with particularly good combination of long-life and electrical performance when present at the 5-50 wt % level, and the best performance at the 15-40 wt % level.Type: ApplicationFiled: August 23, 2016Publication date: December 8, 2016Inventors: MARK THOMAS BELLINO, GERALD HUGH CIECIOR, DOUGLAS JEFFREY HARRIS, WEIMEI LUO, BRIAN DAVID MUNSON, DAT QUOC NGUYEN, SCOTT DANIEL REEVES, TANYA YVONNE THAMES
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Patent number: 9513591Abstract: An improved overcoat layer for an organic photoconductor drum of an electrophotographic image forming device is provided. The overcoat layer is prepared from a curable composition including a triphenylamine charge transport containing two ethyl acrylate functional groups and a urethane resin containing six radical polymerizable functional groups. The amount of the triphenylamine charge transport containing two ethyl acrylate functional groups in the curable composition is about 20 to about 80 percent by weight. The amount of the urethane resin containing six radical polymerizable functional groups in the curable composition is about 20 to about 80 percent by weight. This overcoat layer improves wear resistance of the organic photoconductor drum without negatively altering the electrophotographic properties, thus protecting the organic photoconductor drum from damage and ultimately providing a photoconductor with a longer useful life when compared to other organic photoconductors commercially available.Type: GrantFiled: December 7, 2015Date of Patent: December 6, 2016Assignee: LEXMARK INTERNATIONAL, INC.Inventors: David Glenn Black, Mark Thomas Bellino, James Alan Hartman, Weimei Luo, Scott Daniel Reeves, Tanya Yvonne Thames
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Patent number: 9448497Abstract: An overcoat layer and method to make an overcoated photoconductor drum of an electrophotographic image forming device using irradiation such as with electron beam (EB) or ultraviolet (UV) light is provided. The photoconductor drum is then cured using EB dose of between 10 and 100 kiloGrays (kGy), preferably between 20 and 40 kGys or UV irradiation with an exposure of between 0.1 and 2 J/cm2. The unique overcoat layer of the present invention is formed having a biphasic morphology comprised of a highly cured crosslinked phase and a second phase enriched in uncured material. The desired amount of uncured uncrosslinked material found in the second phase of the biphasic structure, is between 2-70 wt % range, with particularly good combination of long-life and electrical performance when present at the 5-50 wt % level, and the best performance at the 15-40 wt % level.Type: GrantFiled: December 31, 2013Date of Patent: September 20, 2016Assignee: LEXMARK INTERNATIONAL, INC.Inventors: Mark Thomas Bellino, Gerald Hugh Ciecior, Douglas Jeffrey Harris, Weimei Luo, Brian David Munson, Dat Quoc Nguyen, Scott Daniel Reeves, Tanya Yvonne Thames
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Patent number: 9360822Abstract: An improved overcoat layer for an organic photoconductor drum of an electrophotographic image forming device is provided. The overcoat layer is prepared from a curable composition including a triphenylamine charge transport containing two ethyl acrylate functional groups and a urethane resin containing six radical polymerizable functional groups. The amount of the triphenylamine charge transport containing two ethyl acrylate functional groups in the curable composition is about 20 to about 80 percent by weight. The amount of the urethane resin containing six radical polymerizable functional groups in the curable composition is about 20 to about 80 percent by weight. This overcoat layer improves wear resistance of the organic photoconductor drum without negatively altering the electrophotographic properties, thus protecting the organic photoconductor drum from damage and ultimately providing a photoconductor with a longer useful life when compared to other organic photoconductors commercially available.Type: GrantFiled: December 13, 2013Date of Patent: June 7, 2016Assignee: LEXMARK INTERNATIONAL, INC.Inventors: David Glenn Black, Mark Thomas Bellino, James Alan Hartman, Weimei Luo, Scott Daniel Reeves, Tanya Yvonne Thames
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Publication number: 20160085162Abstract: An improved overcoat layer for an organic photoconductor drum of an electrophotographic image forming device is provided. The overcoat layer is prepared from a curable composition including a triphenylamine charge transport containing two ethyl acrylate functional groups and a urethane resin containing six radical polymerizable functional groups. The amount of the triphenylamine charge transport containing two ethyl acrylate functional groups in the curable composition is about 20 to about 80 percent by weight. The amount of the urethane resin containing six radical polymerizable functional groups in the curable composition is about 20 to about 80 percent by weight. This overcoat layer improves wear resistance of the organic photoconductor drum without negatively altering the electrophotographic properties, thus protecting the organic photoconductor drum from damage and ultimately providing a photoconductor with a longer useful life when compared to other organic photoconductors commercially available.Type: ApplicationFiled: December 7, 2015Publication date: March 24, 2016Inventors: DAVID GLENN BLACK, MARK THOMAS BELLINO, JAMES ALAN HARTMAN, WEIMEI LUO, SCOTT DANIEL REEVES, TANYA YVONNE THAMES
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Publication number: 20150185641Abstract: An overcoat layer and method to make an overcoated photoconductor drum of an electrophotographic image forming device using irradiation such as with electron beam (EB) or ultraviolet (UV) light is provided. The photoconductor drum is then cured using EB dose of between 10 and 100 kiloGrays (kGy), preferably between 20 and 40 kGys or UV irradiation with an exposure of between 0.1 and 2 J/cm2. The unique overcoat layer of the present invention is formed having a biphasic morphology comprised of a highly cured crosslinked phase and a second phase enriched in uncured material. The desired amount of uncured uncrosslinked material found in the second phase of the biphasic structure, is between 2-70 wt % range, with particularly good combination of long-life and electrical performance when present at the 5-50 wt % level, and the best performance at the 15-40 wt % level.Type: ApplicationFiled: December 31, 2013Publication date: July 2, 2015Applicant: Lexmark International, Inc.Inventors: Mark Thomas Bellino, Gerald Hugh Ciecior, Douglas Jeffrey Harris, Weimei Luo, Brian David Munson, Dat Quoc Nguyen, Scott Daniel Reeves, Tanya Yvonne Thames
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Publication number: 20150185642Abstract: An overcoat layer and method to make an overcoated photoconductor drum of an electrophotographic image forming device using irradiation such as with electron beam (EB) or ultraviolet (UV) light is provided. The photoconductor drum is then cured using EB dose of between 10 and 100 kiloGrays (kGy), preferably between 20 and 40 kGys or UV irradiation with an exposure of between 0.1 and 2 J/cm2. The unique overcoat layer of the present invention is formed having a biphasic morphology comprised of a highly cured crosslinked phase and a second phase enriched in uncured material. The desired amount of uncured uncrosslinked material found in the second phase of the biphasic structure, is between 2-70 wt % range, with particularly good combination of long-life and electrical performance when present at the 5-50 wt % level, and the best performance at the 15-40 wt % level.Type: ApplicationFiled: December 31, 2013Publication date: July 2, 2015Applicant: Lexmark International, Inc.Inventors: Mark Thomas Bellino, Gerald Hugh Ciecior, Douglas Jeffrey Harris, Weimei Luo, Brian David Munson, Dat Quoc Nguyen, Scott Daniel Reeves, Tanya Yvonne Thames
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Publication number: 20150185640Abstract: An overcoat layer and method to make an overcoated photoconductor drum of an electrophotographic image forming device using irradiation such as with electron beam (EB) or ultraviolet (UV) light is provided. The photoconductor drum is then cured using EB dose of between 10 and 100 kiloGrays (kGy), preferably between 20 and 40 kGys or UV irradiation with an exposure of between 0.1 and 2 J/cm2. The unique overcoat layer of the present invention is formed having a biphasic morphology comprised of a highly cured crosslinked phase and a second phase enriched in uncured material. The desired amount of uncured uncrosslinked material found in the second phase of the biphasic structure, is between 2-70 wt % range, with particularly good combination of long-life and electrical performance when present at the 5-50 wt % level, and the best performance at the 15-40 wt % level.Type: ApplicationFiled: December 31, 2013Publication date: July 2, 2015Applicant: Lexmark International, Inc.Inventors: Mark Thomas Bellino, Gerald Hugh Ciecior, Douglas Jeffrey Harris, Weimei Luo, Brian David Munson, Dat Quoc Nguyen, Scott Daniel Reeves, Tanya Yvonne Thames
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Patent number: 8173338Abstract: An electrophotographic photoconductor system for use in an electrophotographic device and method of using the same. The electrophotoconductor system comprises an electroconductive support, a charge generation layer disposed on the electroconductive support, and a charge transport layer disposed on the charge generation layer. The charge generation layer includes a photosensitive material comprising titanyl phthalocyanine, and at least one oligomeric phenylene additive. The electrophotographic photoconductor system is capable of absorbing light having a wavelength of about 350 nm to about 850 nm.Type: GrantFiled: February 11, 2009Date of Patent: May 8, 2012Assignee: Lexmark International, Inc.Inventors: Mark Thomas Bellino, Weimel Luo, Scott Daniel Reeves, Tanya Yvonne Thames
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Patent number: 7955769Abstract: Embodiments of a photoconductor for use in a printer or printer cartridge comprise an electrically conductive substrate, a charge generation layer disposed over the electrically conductive substrate, and a charge transport layer disposed over the charge generation layer, wherein the charge transport layer comprises charge transport molecules with octyl/decyl glycidyl ether (OGE) or dodecyl/tetradecyl glycidyl ether (DGE), or combinations thereof, added to improve resistance to crazing, cracking and crystallization in the change transport layer.Type: GrantFiled: February 12, 2008Date of Patent: June 7, 2011Assignee: Lexmark International, Inc.Inventors: David Glenn Black, James Alan Hartman, Ronald Harold Levin, Weimei Luo, Dat Quoc Nguyen, Tanya Yvonne Thames
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Patent number: 7920805Abstract: The present disclosure relates to incorporation of boron nitride in the charge transport layer of a photoconductor. The boron nitride may have an aspect ratio of greater than 1.0, a D50 mean particle size of less than about 10.0 ?m and be present at about 5.0% (wt) or less in the charge transport layer. The cartridge may also include toner particles wherein the toner particles have a size range of about 1-25 ?m and an average degree of circularity of about 0.90-1.0. The photoconductor containing boron nitride when used in an electrophotographic printer may then provide acceptable dark decay and/or photoinduced decay (PID) curves relative to photoconductors that do not contain boron nitride along with improved resistance to toner filming.Type: GrantFiled: July 24, 2007Date of Patent: April 5, 2011Assignee: Lexmark International, Inc.Inventors: Mark Thomas Bellino, Weimei Luo, Michael George Sloan, Tanya Yvonne Thames
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Publication number: 20100203436Abstract: An electrophotographic photoconductor system for use in an electrophotographic device and method of using the same. The electrophotoconductor system comprises an electroconductive support, a charge generation layer disposed on the electroconductive support, and a charge transport layer disposed on the charge generation layer. The charge generation layer includes a photosensitive material comprising titanyl phthalocyanine, and at least one oligomeric phenylene additive. The electrophotographic photoconductor system is capable of absorbing light having a wavelength of about 350 nm to about 850 nm.Type: ApplicationFiled: February 11, 2009Publication date: August 12, 2010Inventors: Mark Thomas Bellino, Weimei Luo, Scott Daniel Reeves, Tanya Yvonne Thames
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Patent number: 7642027Abstract: A charge transport composition is provided including a cyclo-aliphatic ether compound. One purpose of the cyclo-aliphatic ether compound is to improve the resistance to crazing, crystallization and etching of the charge transport layer. The charge transport composition may be coated along with a charge generation composition onto a conductive substrate to form a photoconductor. The charge transport composition may therefore be employed in a photoconductor located in a printer or a printer cartridge.Type: GrantFiled: September 27, 2006Date of Patent: January 5, 2010Assignee: Lexmark International, Inc.Inventors: James Alan Hartman, Ronald Harold Levin, Weimei Luo, Dat Quoc Nguyen, Tanya Yvonne Thames
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Publication number: 20090233196Abstract: Embodiments of a photoconductor comprise an electrically conductive substrate, a charge generation layer disposed over the electrically conductive substrate, wherein the charge generation layer comprises titanyl phthalocyanine and copper phthalocyanine, and a charge transport layer disposed over the charge generation layer.Type: ApplicationFiled: March 14, 2008Publication date: September 17, 2009Inventors: Mark Thomas Bellino, Weimei Luo, Scott Daniel Reeves, Tanya Yvonne Thames
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Publication number: 20090202928Abstract: Embodiments of a photoconductor for use in a printer or printer cartridge comprise an electrically conductive substrate, a charge generation layer disposed over the electrically conductive substrate, and a charge transport layer disposed over the charge generation layer, wherein the charge transport layer comprises charge transport molecules with octyl/decyl glycidyl ether (OGE) or dodecyl/ tetradecyl glycidyl ether (DGE), or combinations thereof, added to improve resistance to crazing, cracking and crystallization in the change transport layer.Type: ApplicationFiled: February 12, 2008Publication date: August 13, 2009Inventors: David Glenn Black, James Alan Hartman, Ronald Harold Levin, Weimei Luo, Dat Quoc Nguyen, Tanya Yvonne Thames
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Publication number: 20090029275Abstract: The present disclosure relates to incorporation of boron nitride in the charge transport layer of a photoconductor. The boron nitride may have an aspect ratio of greater than 1.0, a D50 mean particle size of less than about 10.0 ?m and be present at about 5.0% (wt) or less in the charge transport layer. The cartridge may also include toner particles wherein the toner particles have a size range of about 1-25 ?m and an average degree of circularity of about 0.90-1.0. The photoconductor containing boron nitride when used in an electrophotographic printer may then provide acceptable dark decay and/or photoinduced decay (PID) curves relative to photoconductors that do not contain boron nitride along with improved resistance to toner filming.Type: ApplicationFiled: July 24, 2007Publication date: January 29, 2009Inventors: Mark Thomas Bellino, Weimei Luo, Michael George Sloan, Tanya Yvonne Thames
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Publication number: 20080076051Abstract: A charge transport composition is provided including a cyclo-aliphatic ether compound. One purpose of the cyclo-aliphatic ether compound is to improve the resistance to crazing, crystallization and etching of the charge transport layer. The charge transport composition may be coated along with a charge generation composition onto a conductive substrate to form a photoconductor. The charge transport composition may therefore be employed in a photoconductor located in a printer or a printer cartridge.Type: ApplicationFiled: September 27, 2006Publication date: March 27, 2008Inventors: James Alan Hartman, Ronald Harold Levin, Weimei Luo, Dat Quoc Nguyen, Tanya Yvonne Thames