Patents Represented by Attorney, Agent or Law Firm Judith L. Byorick
  • Patent number: 8313884
    Abstract: A process for making toner particles is provided. In embodiments, a suitable process includes adding a defoamer to an emulsion utilized to form toner particles. Utilization of the defoamer allows for a reduction in the overall aggregation/coalescence cycle time and slurry viscosity, while producing a toner with improved GSDs, low coarse and target circularities.
    Type: Grant
    Filed: July 14, 2010
    Date of Patent: November 20, 2012
    Assignee: Xerox Corporation
    Inventors: Kimberly D. Nosella, Allan K. Chen, Zhen Lai, Zhaoyang Ou, Daryl W. Vanbesien
  • Patent number: 8309621
    Abstract: Disclosed is a radiation curable solid ink composition comprising: (a) a curable wax; (b) at least one curable monomer, oligomer, or prepolymer; (c) at least one photoinitiator; and (d) a pigment colorant; wherein the ink is a solid at a first temperature of about 25° C. or lower; and wherein the ink is a liquid at a second temperature of about 40° C. or higher; said ink being curable by free-radical polymerization.
    Type: Grant
    Filed: December 17, 2010
    Date of Patent: November 13, 2012
    Assignee: Xerox Corporation
    Inventors: Marcel P Breton, Michelle N Chretien, Barkev Keoshkerian
  • Patent number: 8288067
    Abstract: The present disclosure provides toners and processes for making said toners. In embodiments, the toners are invisible when viewed under natural light, but possess a UV additive that renders them visible when exposed to UV light of a specific wavelength. By selecting the appropriate UV additive and ionic crosslinker, with optional chelating agent, the gloss of the toner may be tailored to match the gloss of any substrate, such as paper, to which the toner is to be applied, thereby further enhancing its invisibility under visible light.
    Type: Grant
    Filed: March 26, 2009
    Date of Patent: October 16, 2012
    Assignee: Xerox Corporation
    Inventors: Yi Xin Gong, Shigang Qiu, Daryl W. Vanbesien, Gabriel Iftime, Edward Graham Zwartz, Karen Ann Moffat, Richard P. N. Veregin
  • Patent number: 8227163
    Abstract: The present disclosure provides carriers for use with toner compositions. In embodiments, a carrier may include a core having a polymeric coating on at least a portion thereof. The polymer coating possesses cation binding groups. Processes for coating such carriers with the polymeric coatings are also provided.
    Type: Grant
    Filed: March 23, 2010
    Date of Patent: July 24, 2012
    Assignee: Xerox Corporation
    Inventors: Richard P. N. Veregin, Daryl W. Vanbesien, Michael S. Hawkins, Corey L. Tracy
  • Patent number: 8227168
    Abstract: The present disclosure provides processes for the production of block copolymer polyester resins suitable for use in manufacturing toners. In embodiments, the copolymers include both a crystalline block and an amorphous block, which can self-assemble to form nanoparticles suitable for use in forming toners.
    Type: Grant
    Filed: July 14, 2009
    Date of Patent: July 24, 2012
    Assignee: Xerox Corporation
    Inventors: Karen Ann Moffat, Jordan H. Wosnick
  • Patent number: 8227159
    Abstract: The present disclosure provides toner particles having excellent charge characteristics. In embodiments, a toner particle of the present disclosure includes a cation binding material possessing cation binding groups. Processes for producing toners with these cation binding materials are also provided. The resulting toners exhibit excellent stability with respect to relative humidity and excellent charging characteristics.
    Type: Grant
    Filed: February 24, 2011
    Date of Patent: July 24, 2012
    Assignee: Xerox Corporation
    Inventors: Richard P. N. Veregin, Daryl W. Vanbesien, Cuong Vong
  • Patent number: 8211604
    Abstract: A process for making a self-emulsifying composite suitable for use in forming latex emulsions includes contacting a resin with a solid or highly concentrated surfactant, a solid neutralizing agent in the absence of water and an organic solvent to form a mixture, melt mixing the mixture, and forming a self-emulsifying composite of the melt mixed mixture such as a granule. Self-emulsifying granules are also provided and configured to form a latex emulsion when added to water, which may then be utilized to form a toner.
    Type: Grant
    Filed: June 16, 2009
    Date of Patent: July 3, 2012
    Assignee: Xerox Corporation
    Inventors: Santiago Faucher, Rina Carlini, Joo T. Chung, Fumii Higuchi, Shigang Qiu, Allan K. Chen, Edward Graham Zwartz, Michael Steven Hawkins, Brian J. Andaya, Joseph L. Leonardo
  • Patent number: 8211611
    Abstract: A process for making particles is provided. In embodiments, a suitable process includes adding a rheology modifier to an emulsion utilized to form toner particles. The rheology modifier permits the use of a higher solid content in the emulsion, with a resulting higher yield of toner particles, without requiring the use of powerful mixing equipment.
    Type: Grant
    Filed: June 5, 2009
    Date of Patent: July 3, 2012
    Assignee: Xerox Corporation
    Inventors: Zhaoyang Ou, Zhen Lai, Christopher D. Blair, Chieh-Min Cheng
  • Patent number: 8197998
    Abstract: Toner particles are provided which may, in embodiments, include a core and a shell. In embodiments, charge control agents may be co-emulsified with a resin utilized to form a shell. The shell may prevent a crystalline resin in the core from migrating to the toner surface. Inclusion of the charge control agent in the shell itself may provide the resulting toner particles with desirable charge characteristics and sensitivity to relative humidity.
    Type: Grant
    Filed: May 20, 2009
    Date of Patent: June 12, 2012
    Assignee: Xerox Corporation
    Inventors: Ke Zhou, Maria N. V. McDougall, Karen A. Moffat, Richard P. N. Veregin, Enno E. Agur
  • Patent number: 8133649
    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: Grant
    Filed: December 1, 2008
    Date of Patent: March 13, 2012
    Assignee: 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
  • Patent number: 8084177
    Abstract: Disclosed is a toner composition comprising toner particles which comprise a resin, an optional colorant, and a polyhedral oligomeric silsesquioxane compound.
    Type: Grant
    Filed: December 18, 2008
    Date of Patent: December 27, 2011
    Assignee: Xerox Corporation
    Inventors: Ke Zhou, Karen A. Moffat, Maria N V. McDougall, Richard P N. Veregin, Edward G. Zwartz
  • Patent number: 8084180
    Abstract: Toner particles are provided which may, in embodiments, include a core possessing at least one polyester resin in combination with a colorant, optional wax, and optional other additives, and a shell over the core including a high molecular weight amorphous polyester resin. The high molecular weight amorphous polyester resin in the shell may prevent any crystalline polyester resin in the core from migrating to the toner surface.
    Type: Grant
    Filed: June 6, 2008
    Date of Patent: December 27, 2011
    Assignee: Xerox Corporation
    Inventors: Ke Zhou, Maria N. V. McDougall, Edward G. Zwartz, Karen Ann Moffat, Paul J. Gerroir
  • Patent number: 8057974
    Abstract: Disclosed is an imaging member comprising a conductive substrate, a photogenerating layer comprising a photogenerating material in contact with the substrate, and a charge transport layer in contact with the photogenerating layer, the charge transport layer comprising a charge transport material, a polymer containing carboxylic acid groups or groups capable of forming carboxylic acid groups, and a hydroquinone antioxidant, wherein the photogenerating layer is situated between the charge transport layer and the conductive substrate.
    Type: Grant
    Filed: December 11, 2008
    Date of Patent: November 15, 2011
    Assignee: Xerox Corporation
    Inventors: Gregory McGuire, Ah-Mee Hor
  • Patent number: 7985865
    Abstract: A compound having the formula wherein R1, Z, and the carbonyl can be comprised by a common ring, wherein R1 comprises a chromophore that absorbs light from the visible wavelength range, and wherein n is an integer of at least 12. A solid phase change ink composition is also disclosed containing a colorant comprising a chromophore that absorbs light from the visible wavelength range and has the formula wherein R1, Z, and the carbonyl can be comprised by a common ring, and wherein n is an integer of at least 12. Also disclosed is a method of forming a colorant wherein a first compound having the formula is reacted with a second compound having the formula Z(CH2)nCH3 wherein n is an integer of at least 12 to form a third compound having the formula wherein the third compound comprises a chromophore that absorbs light from the visible wavelength range.
    Type: Grant
    Filed: December 14, 2007
    Date of Patent: July 26, 2011
    Assignee: Xerox Corporation
    Inventors: Jeffrey H Banning, Michael B. Meinhardt, Donald R Titterington, Clifford R King
  • Patent number: 7985523
    Abstract: Disclosed is a toner composition comprising toner particles which comprise (a) a resin having chemically bonded thereto a polyhedral oligomeric silsesquioxane, (b) and an optional colorant.
    Type: Grant
    Filed: December 18, 2008
    Date of Patent: July 26, 2011
    Assignee: Xerox Corporation
    Inventors: Ke Zhou, Maria N V. McDougall, Yu Qi, Jordan Wosnick, Karen A. Moffat, Paul J. Gerroir, Richard P N. Veregin
  • Patent number: 7943276
    Abstract: Disclosed is an imaging member comprising a conductive substrate, a photogenerating layer comprising a photogenerating material in contact with the substrate, and a charge transport layer in contact with the photogenerating layer, the charge transport layer comprising a charge transport material, an organic phosphite or organic phosphonite antioxidant, and a hydroquinone antioxidant, wherein the photogenerating layer is situated between the charge transport layer and the conductive substrate.
    Type: Grant
    Filed: December 11, 2008
    Date of Patent: May 17, 2011
    Assignee: Xerox Corporation
    Inventors: Gregory McGuire, Ah-Mee Hor
  • Patent number: 7939678
    Abstract: A compound having the formula wherein R1, Z, and the carbonyl can be comprised by a common ring, wherein R1 comprises a chromophore that absorbs light from the visible wavelength range, and wherein n is an integer of at least 12. A solid phase change ink composition is also disclosed containing a colorant comprising a chromophore that absorbs light from the visible wavelength range and has the formula wherein R1, Z, and the carbonyl can be comprised by a common ring, and wherein n is an integer of at least 12. Also disclosed is a method of forming a colorant wherein a first compound having the formula is reacted with a second compound having the formula Z(CH2)nCH3 wherein n is an integer of at least 12 to form a third compound having the formula wherein the third compound comprises a chromophore that absorbs light from the visible wavelength range.
    Type: Grant
    Filed: December 14, 2007
    Date of Patent: May 10, 2011
    Assignee: Xerox Corporation
    Inventors: Jeffrey H Banning, Clifford R King, Donald R Titterington, Michael B Meinhardt
  • Patent number: 7714040
    Abstract: Disclosed is a phase change ink comprising a colorant, an initiator, and a phase change ink carrier, said carrier comprising at least one radically curable monomer compound and a compound of the formula wherein R1 and R1? each, independently of the other, is an alkyl group having at least one ethylenic unsaturation, an arylalkyl group having at least one ethylenic unsaturation, or an alkylaryl group having at least one ethylenic unsaturation, R2, R2?, and R3 each, independently of the others, are alkylene groups, arylene groups, arylalkylene groups, or alkylarylene groups, and n is an integer representing the number of repeat amide units and is at least 1. Also disclosed herein is a method of printing with the phase change ink.
    Type: Grant
    Filed: November 30, 2005
    Date of Patent: May 11, 2010
    Assignee: Xerox Corporation
    Inventors: Eniko Toma, Jennifer L. Belelie, Peter G. Odell
  • Patent number: 7658486
    Abstract: Disclosed is a phase change ink composition including an ink carrier and a colorant, said ink being suitable for use in an indirect printing process wherein the ink is jetted from a printhead onto a heated intermediate transfer member and subsequently transferred from the intermediate transfer member to a final recording substrate, wherein: (a) the ink exhibits the characteristic of being jetted from the printhead onto the intermediate transfer member when the ink at a temperature of about 125° C. or lower; (b) the ink exhibits the characteristic of being jetted without purging from a printer maintained at a standby temperature of about 100° C. or lower; and (c) the ink has a cohesive failure temperature of at least about 56° C.
    Type: Grant
    Filed: November 30, 2005
    Date of Patent: February 9, 2010
    Assignee: Xerox Corporation
    Inventors: Trevor J. Snyder, Bo Wu, Patricia A. Wang, Donald R. Titterington, Jule W. Thomas, Jr., Randall R. Bridgeman, Mark H. Tennant
  • Patent number: 7625956
    Abstract: Disclosed is a phase change ink comprising a colorant, an initiator, and an ink vehicle, said ink vehicle comprising (a) at least one radically curable monomer compound, and (b) a compound of the formula wherein R1 is an alkylene, arylalkylene, or alkylarylene group, R2 and R2? each, independently of the other, are alkylene, arylene, arylalkylene, or alkylarylene groups, R3 and R3? each, independently of the other, are either (a) photoinitiating groups, or (b) groups which are alkyl, aryl, arylalkyl, or alkylaryl groups, provided that at least one of R3 and R3? is a photoinitiating group, and X and X? each, independently of the other, is an oxygen atom or a group of the formula —NR4—, wherein R4 is a hydrogen atom, an alkyl group, an aryl group, an arylalkyl group, or an alkylaryl group.
    Type: Grant
    Filed: November 30, 2005
    Date of Patent: December 1, 2009
    Assignee: Xerox Corporation
    Inventors: Peter G. Odell, Eniko Toma, Jennifer L. Belelie