Patents by Inventor Edward G. Zwartz

Edward G. Zwartz 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 process
    Patent number: 7981973
    Abstract: The present disclosure relates to a process for latex preparation comprising a first heating of a latomer mixture comprising at least one free radical polymerizable monomer to low conversion and then adding at least one alkylene anhydride; a second heating of the latomer mixture to low conversion; a third heating of the latomer mixture to form polymeric particles; and combining at least one amine with the polymeric particles.
    Type: Grant
    Filed: April 29, 2008
    Date of Patent: July 19, 2011
    Assignee: Xerox Corporation
    Inventors: Barkev Keoshkerian, Raj Patel, Edward G. Zwartz, Cuong Vong
  • Solvent-free toner making process using phase inversion
    Patent number: 7977024
    Abstract: A process for making toner particles comprising: (a) forming an emulsion comprising a disperse phase including a first aqueous composition and a continuous phase including molten one or more ingredients of a toner composition, wherein there is absent a toner resin solvent in the continuous phase; (b) performing a phase inversion to create a phase inversed emulsion comprising a disperse phase including toner-sized droplets comprising the molten one or more ingredients of the toner composition and a continuous phase including a second aqueous composition; and (c) solidifying the toner-sized droplets to result in toner particles.
    Type: Grant
    Filed: December 16, 2005
    Date of Patent: July 12, 2011
    Assignee: Xerox Corporation
    Inventors: Ke Zhou, Guerino G. Sacripante, Edward G. Zwartz
  • System and method for protecting an image on a substrate
    Patent number: 7970333
    Abstract: A system and a method to protect an image on a substrate. The method includes forming an unfused toner image, partially fusing the unfused toner image at a first temperature by exposing the composition to radiation to prevent disruption of the image upon application of the wax-hybrid composition to form a partially fused toner image, cooling the partially fused toner image to a second temperature, providing a protective coating composition comprising a wax-hybrid, applying the protective coating composition over the partially fused toner image, permanently fixing the protective coating composition and partially fused toner image to form a final printed image.
    Type: Grant
    Filed: July 24, 2008
    Date of Patent: June 28, 2011
    Assignee: Xerox Corporation
    Inventors: Christine D. Anderson, T. Brian Mcaneney, Christopher A. Wagner, Edward G. Zwartz, Stephan V. Drappel
  • CHEMICAL TONER CONTAINING SUBLIMATION COLORANT FOR SECONDARY TRANSFER PROCESS
    Publication number: 20110104607
    Abstract: A chemical toner composition that includes at least one curable amorphous resin and at least one sublimation colorant.
    Type: Application
    Filed: November 3, 2009
    Publication date: May 5, 2011
    Applicant: Xerox Corporation
    Inventors: Yulin WANG, Ke ZHOU, Edward G. ZWARTZ, T. Hwee NG
  • CURABLE TONER COMPOSITIONS AND PROCESSES
    Publication number: 20110091803
    Abstract: An emulsion aggregation toner composition includes toner particles including: an amorphous polyester resin; an optional crystalline resin; an optional colorant; an optional wax; an optional coagulant; and a polymeric or oligomeric hydroxy ketone photo initiator capable of initiating crosslinking of said polyester resin, wherein at least one of the amorphous polyester resin and the optional crystalline resin when present is unsaturated.
    Type: Application
    Filed: October 15, 2009
    Publication date: April 21, 2011
    Applicant: XEROX CORPORATION
    Inventors: Ke ZHOU, Daryl W. VANBESIEN, Edward G. ZWARTZ, Guerino G. SACRIPANTE, Karen A. MOFFAT
  • Chemical toner with covalently bonded release agent
    Patent number: 7901859
    Abstract: A chemical toner composition including a polymer polymerized from starting ingredients comprising a resin monomer and a release agent monomer.
    Type: Grant
    Filed: April 10, 2007
    Date of Patent: March 8, 2011
    Assignee: Xerox Corporation
    Inventors: Daryl W Vanbesien, Edward G Zwartz, Cuong Vong, Maria N V McDougall, Timothy P Bender, Jennifer L Belelie, Tyler Norsten
  • TONER COMPOSITIONS AND PROCESSES
    Publication number: 20110003243
    Abstract: Environmentally friendly toner particles are provided which may include a bio-based amorphous polyester resin, optionally in combination with another amorphous resin and/or a crystalline resin. Methods for providing these toners are also provided.
    Type: Application
    Filed: September 9, 2010
    Publication date: January 6, 2011
    Applicant: XEROX CORPORATION
    Inventors: Guerino G. Sacripante, Valerie M. Farrugia, Ke Zhou, Edward G. Zwartz, Michael S. Hawkins
  • Emulsion aggregation toner composition
    Patent number: 7862971
    Abstract: An emulsion aggregation toner having toner particles comprising a gel latex, a high Tg latex and at least one wax, wherein the toner fuses at about 170° C. to about 220° C. at process speeds of from about 560 mm/s to about 870 mm/s, wherein the toner exhibits a crease fix property of less than about 60 and a half-toner rub fix property of less than about 0.15. The toner exhibits excellent half-tone rub fix performance and crease fix at high print speeds.
    Type: Grant
    Filed: January 31, 2007
    Date of Patent: January 4, 2011
    Assignee: Xerox Corporation
    Inventors: Karen A. Moffat, Edward G. Zwartz, T. Brian McAneney, Fernando P. Yulo
  • Polyester emulsion containing crosslinked polyester resin, process, and toner
    Patent number: 7851519
    Abstract: A polyester resin emulsion includes crosslinked polyester resin in an emulsion medium, the crosslinked polyester resin having a degree of crosslinking of from about 0.1 percent to about 100 percent. The emulsion can be formed by solvent flashing a mixture of a polyester resin, an initiator, a solvent, and an emulsion medium, wherein the crosslinked polyester resin has a degree of crosslinking of from about 0.1 percent to about 100 percent.
    Type: Grant
    Filed: January 25, 2007
    Date of Patent: December 14, 2010
    Assignee: Xerox Corporation
    Inventors: Enno E. Agur, Daryl W. Vanbesien, Valerie M. Farrugia, Guerino G. Sacripante, Maria N. V. McDougall, Edward G. Zwartz
  • CURABLE TONER COMPOSITIONS AND PROCESSES
    Publication number: 20100285403
    Abstract: Processes for producing emulsion aggregation toners are provided. In embodiments, methods of the present disclosure may be utilized to produce toners suitable for low melt applications, including use in flexible packaging applications, where low pile height is desired for low cost and flexibility. In embodiments, the EA toners may be prepared by optimizing the particle size of the emulsion, the choice of and amount of aggregating agent utilized, and the solids content of the emulsion.
    Type: Application
    Filed: May 8, 2009
    Publication date: November 11, 2010
    Applicant: Xerox Corporation
    Inventors: Guerino G. Sacripante, Nathan C. Dyck, Daryl W. Vanbesien, Edward G. Zwartz, Cuong Vong
  • CURABLE TONER COMPOSITIONS AND PROCESSES
    Publication number: 20100285401
    Abstract: Processes for producing emulsion aggregation toners are provided. In embodiments, methods of the present disclosure may be utilized to produce toners suitable for low melt applications, including use in flexible packaging applications, where low pile height is desired for low cost and flexibility. In embodiments, the EA toners may be prepared by optimizing the particle size of the emulsion, the choice of and amount of aggregating agent utilized, and the solids content of the emulsion.
    Type: Application
    Filed: May 8, 2009
    Publication date: November 11, 2010
    Applicant: Xerox Corporation
    Inventors: Guerino G. Sacripante, Nathan C. Dyck, Daryl W. Vanbesien, Edward G. Zwartz, Coung Vong
  • Polyester-wax based emulsion aggregation toner compositions
    Patent number: 7829255
    Abstract: Emulsion aggregation toners comprising a polyester-wax resin, wherein the polyester-wax resin includes a wax that is chemically incorporated into the main chain of the polyester.
    Type: Grant
    Filed: December 3, 2007
    Date of Patent: November 9, 2010
    Assignee: Xerox Corporation
    Inventors: Guerino G. Sacripante, Richard P. N. Veregin, Edward G. Zwartz, Maria N. V. McDougall
  • Emulsion aggregation processes
    Patent number: 7785763
    Abstract: A process for preparing a toner, includes solvent flashing wax and resin together to emulsify the resin and wax to a sub-micro size; mixing the wax and resin emulsion with a colorant, and optionally a coagulant to form a mixture; heating the mixture at a temperature below a glass transition temperature of the resin to aggregate the resin, colorant, and wax, to form aggregated particles; heating the aggregated particles and coalescent agent at a temperature above the glass transition temperature of said resin, to coalesce the aggregated particles to form toner particles, optionally cooling the mixture; and isolating the toner particles.
    Type: Grant
    Filed: October 13, 2006
    Date of Patent: August 31, 2010
    Assignee: Xerox Corporation
    Inventors: Enno E. Agur, Guerino G. Sacripante, Michael S. Hawkins, Edward G. Zwartz
  • Method of making a pigmented phase change ink with dispersant and synergist
    Patent number: 7780774
    Abstract: A method of making a phase change ink composition includes adding to a device with a stirring element at least one pigment, at least one dispersant and at least one synergist, processing the device at an elevated temperature and at a stirring rate to wet the at least one pigment to obtain an ink concentrate, and mixing the ink concentrate with an ink vehicle to obtain the ink composition. The device may be an extruder, an attritor or the like. The method allows for the reduction in the amount of dispersant to include in the ink.
    Type: Grant
    Filed: January 27, 2009
    Date of Patent: August 24, 2010
    Assignee: Xerox Corporation
    Inventors: Raymond W. Wong, Marcel P. Breton, James D. Mayo, C. Geoffrey Allen, Vladislav Skorokhod, Edward G. Zwartz, Kimberly D. Nosella, Christine D. Anderson
  • Low melt toners and processes thereof
    Patent number: 7781138
    Abstract: A process for preparing toner particles and compositions adapted for use in preparing toners that comprise a blend of a first polyester resin with a second sharp melting polyester resin. The process includes forming an emulsion resin comprising a branched polyester resin, a crystalline polyester resin, a colorant, and optionally a wax. The resin mixture is aggregated using an aggregating agent, such as a zinc acetate solution, to form an aggregate mixture. The aggregate mixture is then coalesced at a temperature of from about 5 to about 20° C. above the Tg of the emulsion resin to produce the resultant toner particles.
    Type: Grant
    Filed: October 6, 2009
    Date of Patent: August 24, 2010
    Assignee: Xerox Corporation
    Inventors: Guerino G. Sacripante, Fatima M. Mayer, Kimberly D. Nosella, Valerie M. Farrugia, Raj D. Patel, Milan Maric, Allen K. Chen, Edward G. Zwartz, T. Hwee Ng
  • TONER COMPOSITIONS AND PROCESSES
    Publication number: 20100203439
    Abstract: Environmentally friendly toner particles are provided which may, in embodiments, include a bio-based amorphous polyester resin, optionally in combination with another amorphous resin and/or a crystalline resin. Toner particles may, in embodiments, have a core-shell configuration, with the shell formed of the bio-based amorphous polyester resin, the amorphous polyester resin, the crystalline polyester resin, or combinations thereof.
    Type: Application
    Filed: February 6, 2009
    Publication date: August 12, 2010
    Applicant: Xerox Corporation
    Inventors: Ke Zhou, Richard P.N. Veregin, Gwynne McAneney-Lannen, Edward G. Zwartz, Maria N.V. McDougall, Guerino Sacripante, Karen A. Moffat
  • METHOD FOR PAPER TREATMENT
    Publication number: 20100196819
    Abstract: Provided herein is a surface treatment method of oil contaminated xerographic prints which increases the adhesion of the print to levels close to the values corresponding to the original uncontaminated paper. Subjecting the contaminated surface to corona treatment alone and in combination with ultraviolet (UV) radiation and ozone can change the chemical structure of the surface of the paper in such a way that a highly polar surface is created as a consequence of this treatment, leading to enhanced adhesion properties of the xerographic print.
    Type: Application
    Filed: October 7, 2009
    Publication date: August 5, 2010
    Applicant: XEROX CORPORATION
    Inventors: Guiqin Song, Edward G. Zwartz, Nicoleta Mihai, Nan-Xing Hu, T. Brian McAneney
  • METHOD OF MAKING A PIGMENTED PHASE CHANGE INK WITH DISPERSANT AND SYNERGIST
    Publication number: 20100186624
    Abstract: A method of making a phase change ink composition includes adding to a device with a stirring element at least one pigment, at least one dispersant and at least one synergist, processing the device at an elevated temperature and at a stirring rate to wet the at least one pigment to obtain an ink concentrate, and mixing the ink concentrate with an ink vehicle to obtain the ink composition. The device may be an extruder, an attritor or the like. The method allows for the reduction in the amount of dispersant to include in the ink.
    Type: Application
    Filed: January 27, 2009
    Publication date: July 29, 2010
    Applicant: XEROX CORPORATION
    Inventors: Raymond W. WONG, Marcel P. BRETON, James D. MAYO, C. Geoffrey ALLEN, Vladislav SKOROKHOD, Edward G. ZWARTZ, Kimberly D. NOSELLA, Christine D. Anderson
  • TONERS CONTAINING POLYHEDRAL OLIGOMERIC SILSESQUIOXANES
    Publication number: 20100159375
    Abstract: Disclosed is a toner composition comprising toner particles which comprise a resin, an optional colorant, and a polyhedral oligomeric silsesquioxane compound.
    Type: Application
    Filed: December 18, 2008
    Publication date: June 24, 2010
    Applicant: Xerox Corporation
    Inventors: Ke Zhou, Karen A. Moffat, Maria N. V. McDougall, Richard P. N. Veregin, Edward G. Zwartz
  • TONER COMPOSITIONS
    Publication number: 20100136472
    Abstract: Toner particles are provided which may, in embodiments, include a high molecular weight branched or cross-linked polyester to decrease image gloss and to increase toner elasticity to prevent surface additives impaction. In embodiments, the toner particles may have a core-shell configuration, with the high molecular weight polyester in the core, the shell, or both.
    Type: Application
    Filed: December 1, 2008
    Publication date: June 3, 2010
    Applicant: Xerox Corporation
    Inventors: Maria N.V. McDougall, Ke Zhou, Edward G. Zwartz, Daryl W. Vanbesien, John L. Pawlak, Paul J. Gerroir, Suxia Yang, Richard P.N. Veregin, Karen Ann Moffat