Patents by Inventor Tie Hwee Ng
Tie Hwee Ng 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: 9612549Abstract: The present disclosure describes a cartridge with a black toner of reduced dielectric loss and improved tribo charging.Type: GrantFiled: October 10, 2015Date of Patent: April 4, 2017Assignee: XEROX CORPORATIONInventors: Daryl W Vanbesien, Majid Kamel, Cuong Vong, Suxia Yang, Kimberly Nosella, Richard P N Veregin, Tie Hwee Ng
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Patent number: 9372425Abstract: A transfer printing method including applying a curable sublimation toner having at least one curable component and at least one sublimation colorant in a desired pattern onto a transfer substrate to form an image on the transfer substrate at a first temperature which is below the sublimation temperature of the sublimation colorant; wherein the curable sublimation toner is a conventional toner or a chemical toner; and wherein the curable sublimation toner includes at least one curable amorphous resin and optionally, a crystalline resin; curing the image on the transfer substrate; and optionally, bringing the transfer substrate into contact with a final image-receiving substrate, optionally applying pressure, and heating to a second temperature which is sufficient to cause the sublimation colorant to sublime and form a permanent image on the final image-receiving substrate.Type: GrantFiled: August 16, 2010Date of Patent: June 21, 2016Assignee: Xerox CorporationInventors: Yulin Wang, Ke Zhou, Tie Hwee Ng, Marko Saban
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Patent number: 9285693Abstract: The disclosure describes a process to produce toner with tunable gloss levels comprising a stabilizer to freeze particle growth following aggregation, where the stabilizer does not chelate metal ions.Type: GrantFiled: January 6, 2015Date of Patent: March 15, 2016Assignee: Xerox CorporationInventors: Yulin Wang, Ke Zhou, Tie Hwee Ng, Edward Graham Zwartz, Cuong Vong, Shigang Qiu
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Patent number: 9201324Abstract: A process for making a latex emulsion suitable for use in a toner composition includes contacting at least one polyester resin optionally with an organic solvent to form a resin mixture, adding a primary amine, optionally a surfactant, and deionized water to the mixture.Type: GrantFiled: February 18, 2010Date of Patent: December 1, 2015Assignee: Xerox CorporationInventors: Shigang S. Qiu, Kimberly D. Nosella, Tie Hwee Ng, Santiago Faucher, Fumii Higuchi
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Publication number: 20150118609Abstract: The disclosure describes a process to produce toner with tunable gloss levels comprising a stabilizer to freeze particle growth following aggregation, where the stabilizer does not chelate metal ions.Type: ApplicationFiled: January 6, 2015Publication date: April 30, 2015Inventors: Yulin Wang, Ke Zhou, Tie Hwee Ng, Edward Graham Zwartz, Cuong Vong, Shigang Qiu
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Patent number: 9012118Abstract: Toners are provided which possess excellent blocking characteristics. The toners include cores including amorphous resins having low glass transition temperatures, amorphous resins having high glass transition temperatures, and crystalline resins, and shells including amorphous resins having high glass transition temperatures.Type: GrantFiled: March 4, 2010Date of Patent: April 21, 2015Assignee: Xerox CorporationInventors: Allan K. Chen, Tie Hwee Ng, Edward Graham Zwartz, Michael S. Hawkins
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Patent number: 8968978Abstract: A method for reclaiming an out-of-spec emulsion material includes recovering the out-of-spec emulsion material from a scrap manufacturing batch; distilling the out-of-spec emulsion material to raise a solids content of the out-of-spec emulsion material to about 45 wt % or more based on a total weight of the emulsion material; dissolving the distilled emulsion material in a solvent to form a first mixture; adding a base to the first mixture to neutralize acid groups present in the distilled emulsion material, forming a second mixture; emulsifying the second mixture by adding water to the second mixture; and forming particles having an average particle diameter (D50v) within a target range, wherein the out-of-spec emulsion material has an average particle diameter falling outside of the target range.Type: GrantFiled: June 13, 2013Date of Patent: March 3, 2015Assignee: Xerox CorporationInventors: Shigang Steven Qiu, Amy Grillo, Chieh-Min Cheng, Tie Hwee Ng
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Patent number: 8927679Abstract: The disclosure describes a process to produce toner with tunable gloss levels comprising a stabilizer to freeze particle growth following aggregation, where the stabilizer does not chelate metal ions.Type: GrantFiled: January 15, 2013Date of Patent: January 6, 2015Assignee: Xerox CorporationInventors: Yulin Wang, Ke Zhou, Tie Hwee Ng, Edward Graham Zwartz, Cuong Vong, Shigang Qiu
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Publication number: 20140370434Abstract: A method for reclaiming an out-of-spec emulsion material includes recovering the out-of-spec emulsion material from a scrap manufacturing batch; distilling the out-of-spec emulsion material to raise a solids content of the out-of-spec emulsion material to about 45 wt % or more based on a total weight of the emulsion material; dissolving the distilled emulsion material in a solvent to form a first mixture; adding a base to the first mixture to neutralize acid groups present in the distilled emulsion material, forming a second mixture; emulsifying the second mixture by adding water to the second mixture; and forming particles having an average particle diameter (D50v) within a target range, wherein the out-of-spec emulsion material has an average particle diameter falling outside of the target range.Type: ApplicationFiled: June 13, 2013Publication date: December 18, 2014Inventors: Shigang Steven QIU, Amy GRILLO, Chieh-Min CHENG, Tie Hwee NG
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Publication number: 20140356776Abstract: A toner particle includes a core including at least one resin, optionally a wax, and a colorant, and a shell comprising at least one charge control agent. The core is substantially free of the charge control agent. The toner particle has improved charging performance compared with core-shell toner particles having the charge control agent in the core of the toner particle.Type: ApplicationFiled: May 31, 2013Publication date: December 4, 2014Inventors: ROBERT D. BAYLEY, MAURA A. SWEENEY, GRAZYNA E. KMIECIK-LAWRYNOWICZ, SHIGANG STEVEN QIU, TIE HWEE NG
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Publication number: 20140199623Abstract: The disclosure describes a process to produce toner with tunable gloss levels comprising a stabilizer to freeze particle growth following aggregation, where the stabilizer does not chelate metal ions.Type: ApplicationFiled: January 15, 2013Publication date: July 17, 2014Applicant: XEROX CORPORATIONInventors: Yulin Wang, Ke Zhou, Tie Hwee Ng, Edward Graham Zwartz, Cuong Vong, Shigang Qiu
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Patent number: 8709696Abstract: A curable sublimation marking material including at least one curable component and at least one sublimation colorant. Also disclosed is a transfer printing method including applying a curable sublimation marking material in a desired pattern onto a transfer substrate to form an image on the transfer substrate at a first temperature which is below the sublimation temperature of the sublimation colorant; wherein the curable sublimation marking material comprises at least one curable component and at least one sublimation colorant; curing the image on the transfer substrate; and optionally, bringing the transfer substrate into contact with a final image-receiving substrate, optionally applying pressure, and heating to a second temperature which is sufficient to cause the sublimation colorant to sublime and form a permanent image on the final image-receiving substrate.Type: GrantFiled: August 16, 2010Date of Patent: April 29, 2014Assignee: Xerox CorporationInventors: Yulin Wang, Ke Zhou, Tie Hwee Ng, Marko Saban
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Patent number: 8486602Abstract: A method of making toner particles, including cold homogenizing at a temperature below room temperature a resin emulsion, a colorant, an optional wax, and optional additives with a coagulant to form a toner slurry; heating the toner slurry to form aggregated toner particles; freezing aggregation of the particles in the slurry once at a desired aggregated particle size; and further heating the aggregated particles in the slurry to coalesce the aggregated particles into toner particles.Type: GrantFiled: October 22, 2009Date of Patent: July 16, 2013Assignee: Xerox CorporationInventors: Kimberly D. Nosella, Tie Hwee Ng, Allan K. Chen, Abdisamed Sheik-Qasim, Melanie L. Davis
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Patent number: 8435714Abstract: A process for making toner particles is provided. In embodiments, a suitable process includes melt mixing a resin in the absence of an organic solvent, optionally adding a surfactant to the resin, adding to the resin at least one colorant and other optional toner additives, adding to the resin a basic agent and water to form a mixture, and subjecting the mixture to acoustic mixing at a suitable frequency to form to form an emulsion. A phase inversion may then be performed to create a phase inversed emulsion including a disperse phase comprising molten resin and the optional ingredients of the toner composition, at which time toner-sized droplets may be solidified from the disperse phase into toner particles, which can be recovered for use.Type: GrantFiled: June 25, 2010Date of Patent: May 7, 2013Assignee: Xerox CorporationInventors: Zhen Lai, Chieh-Min Cheng, Shigang Qiu, Emily L. Moore, Tie Hwee Ng
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Patent number: 8337007Abstract: A transfer printing method including applying a curable sublimation ink having at least one curable component and at least one sublimation colorant in a desired pattern onto a transfer substrate to form an image on the transfer substrate at a first temperature which is below the sublimation temperature of the sublimation colorant; curing the image on the transfer substrate; and optionally, bringing the transfer substrate into contact with a final image-receiving substrate, optionally applying pressure, and heating to a second temperature which is sufficient to cause the sublimation colorant to sublime and form a permanent image on the final image-receiving substrate.Type: GrantFiled: August 16, 2010Date of Patent: December 25, 2012Assignee: Xerox CorporationInventors: Yulin Wang, Ke Zhou, Tie Hwee Ng, Marko Saban
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Publication number: 20120308925Abstract: The present disclosure describes a hyperpigmented low melt black toner containing a thermal carbon black which exhibits reduced dielectric loss and improved tribo charging.Type: ApplicationFiled: May 30, 2011Publication date: December 6, 2012Applicant: XEROX CORPORATIONInventors: Daryl W. Vanbesien, Magid Kamel, Cuong Vong, Suxia Yang, Kimberly D. Nosella, Richard P.N. Veregin, Tie Hwee Ng
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Patent number: 8124309Abstract: A process for making a resin emulsion suitable for use in forming toner particles is provided. In embodiments, a suitable process includes melt mixing a resin in the absence of an organic solvent, optionally adding a surfactant to the resin, adding to the resin a basic agent and water, and subjecting the resin, basic agent and water to acoustic mixing at a suitable frequency to form an emulsion of resin particles. In embodiments, the resin emulsion thus produced may be utilized to form a toner.Type: GrantFiled: April 20, 2009Date of Patent: February 28, 2012Assignee: Xerox CorporationInventors: Zhen Lai, Chieh-Min Cheng, Shigang Qiu, Emily L. Moore, Tie Hwee Ng
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Publication number: 20120040287Abstract: A curable sublimation marking material including at least one curable component and at least one sublimation colorant. Also disclosed is a transfer printing method including applying a curable sublimation marking material in a desired pattern onto a transfer substrate to form an image on the transfer substrate at a first temperature which is below the sublimation temperature of the sublimation colorant; wherein the curable sublimation marking material comprises at least one curable component and at least one sublimation colorant; curing the image on the transfer substrate; and optionally, bringing the transfer substrate into contact with a final image-receiving substrate, optionally applying pressure, and heating to a second temperature which is sufficient to cause the sublimation colorant to sublime and form a permanent image on the final image-receiving substrate.Type: ApplicationFiled: August 16, 2010Publication date: February 16, 2012Applicant: XEROX CORPORATIONInventors: Yulin Wang, Ke Zhou, Tie Hwee Ng, Marko Saban
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Publication number: 20120038723Abstract: A transfer printing method including applying a curable sublimation ink having at least one curable component and at least one sublimation colorant in a desired pattern onto a transfer substrate to form an image on the transfer substrate at a first temperature which is below the sublimation temperature of the sublimation colorant; curing the image on the transfer substrate; and optionally, bringing the transfer substrate into contact with a final image-receiving substrate, optionally applying pressure, and heating to a second temperature which is sufficient to cause the sublimation colorant to sublime and form a permanent image on the final image-receiving substrate.Type: ApplicationFiled: August 16, 2010Publication date: February 16, 2012Applicant: XEROX CORPORATIONInventors: Yulin Wang, Ke Zhou, Tie Hwee Ng, Marko Saban
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Publication number: 20120040281Abstract: A transfer printing method including applying a curable sublimation toner having at least one curable component and at least one sublimation colorant in a desired pattern onto a transfer substrate to form an image on the transfer substrate at a first temperature which is below the sublimation temperature of the sublimation colorant; wherein the curable sublimation toner is a conventional toner or a chemical toner; and wherein the curable sublimation toner includes at least one curable amorphous resin and optionally, a crystalline resin; curing the image on the transfer substrate; and optionally, bringing the transfer substrate into contact with a final image-receiving substrate, optionally applying pressure, and heating to a second temperature which is sufficient to cause the sublimation colorant to sublime and form a permanent image on the final image-receiving substrate.Type: ApplicationFiled: August 16, 2010Publication date: February 16, 2012Applicant: XEROX CORPORATIONInventors: Yulin Wang, Ke Zhou, Tie Hwee Ng, Marko Saban