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).

  • Patent number: 7522869
    Abstract: A process of MICR and non-MICR electrostatic magnetic imaging of two independent electrostatic latent images including forming a first electrostatic latent image in a MICR printing apparatus; developing the first electrostatic latent image by contacting the first electrostatic latent image with a MICR toner to produce a developed MICR toner image; transferring the developed MICR toner image onto a check; forming a second electrostatic latent image in a non-MICR printing apparatus; developing the second electrostatic latent image by contacting the second electrostatic latent image with a non-MICR toner to produce a developed non-MICR image; transferring the developed non-MICR toner image to the check; and fusing the developed MICR toner image and the developed non-MICR toner image to the check.
    Type: Grant
    Filed: September 18, 2006
    Date of Patent: April 21, 2009
    Assignee: Xerox Corporation
    Inventors: Christine Anderson, T Brian McAneney, Kurt I. Halfyard, Edward G. Zwartz, Gordon Sisler
  • Patent number: 7514195
    Abstract: Toner compositions provide a resin substantially free of cross linking; a cross linked resin; a wax; a coagulant; and a colorant; wherein the toner composition provides a fused image gloss of about 1 to about 20 gloss units.
    Type: Grant
    Filed: December 3, 2004
    Date of Patent: April 7, 2009
    Assignee: Xerox Corporation
    Inventors: Edward G. Zwartz, T. Brian McAneney, Daryl Vanbesien, Patricia A. Burns, T. Hwee Ng
  • Publication number: 20090061349
    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: Application
    Filed: June 17, 2008
    Publication date: March 5, 2009
    Applicant: XEROX CORPORATION
    Inventors: Guerino G. Sacripante, Fatima M. Mayer, Kimberly D. Nosella, Valerie M. Farrugia, Raj D. Patel, Milan Maric, Allan K. Chen, Edward G. Zwartz, T. Hwee Ng
  • Patent number: 7494757
    Abstract: A toner having an amorphous resin, a crystalline resin, and a colorant, wherein the crystalline resin has a melting temperature of at least 70° C. and a recrystallization point of at least 47° C. exhibits improved document offset properties and improved heat cohesion. Annealing the toner further improves the heat cohesion and morphology of the toner.
    Type: Grant
    Filed: March 25, 2005
    Date of Patent: February 24, 2009
    Assignee: Xerox Corporation
    Inventors: Guerino G. Sacripante, Ke Zhou, Michael S. Hawkins, Kimberly D. Nosella, Edward G. Zwartz, Nicoleta D. Mihai, Valerie M. Farrugia, Stephan V. Drappel, Paul J. Gerroir
  • Patent number: 7442740
    Abstract: A toner process that includes a first heating of a colorant dispersion, a first polyester resin free latex emulsion, a second polyester latex emulsion, and a wax dispersion in the presence of a coagulant containing a metal ion; adding a third polyester free latex; adding an organic sequestering compound or a silicate salt sequestering compound, followed by a second heating.
    Type: Grant
    Filed: April 8, 2008
    Date of Patent: October 28, 2008
    Assignee: Xerox Corporation
    Inventors: Raj D Patel, Guerino G Sacripante, Edward G Zwartz, Enno E Agur, Allan K Chen, T. Hwee Ng, Kimberly D Nosella, Cuong Vong, Karen A Moffat
  • Publication number: 20080254381
    Abstract: A chemical toner composition including a polymer polymerized from starting ingredients comprising a resin monomer and a release agent monomer.
    Type: Application
    Filed: April 10, 2007
    Publication date: October 16, 2008
    Applicant: XEROX CORPORATION
    Inventors: Daryl W. Vanbesien, Edward G. Zwartz, Cuong Vong, Maria N V. McDougall, Timothy P. Bender, Jennifer L. Belelie, Tyler Norsten
  • Publication number: 20080220362
    Abstract: Image recording device comprising a development system including toner particles comprising a gel latex, a high Tg latex, a wax, and a colorant, and a fuser member, such as a fluoropolymer coated fuser member, which produces images having improved document offset, vinyl offset and half-tone rub properties.
    Type: Application
    Filed: March 6, 2007
    Publication date: September 11, 2008
    Applicant: XEROX CORPORATION
    Inventors: Emily L. MOORE, Patricia A. BURNS, Michael L. GRANDE, William H. HOLLENBAUGH, Edward G. ZWARTZ, Shigang S. QIU, Maria N.V. MCDOUGALL, Daryl W. VANBESIEN, T. Brian MCANENEY
  • Patent number: 7419753
    Abstract: A toner composition that includes a resin substantially free of cross linking, a cross linked resin, a polyester resin as a crystalline polyester resin, and a colorant.
    Type: Grant
    Filed: December 20, 2005
    Date of Patent: September 2, 2008
    Assignee: Xerox Corporation
    Inventors: Daryl W. Vanbesien, Raj D. Patel, Karen A. Moffat, Edward G. Zwartz, Cuong Vong
  • Publication number: 20080197283
    Abstract: Disclosed herein are toner compositions and developers particularly suitable for use in xerographic devices having oil-less fuser systems. The disclosed toner composition is substantially free of crystalline resin.
    Type: Application
    Filed: February 16, 2007
    Publication date: August 21, 2008
    Applicant: XEROX CORPORATION
    Inventors: Richard P.N. VEREGIN, Eric M. STROHM, Eric ROTBERG, Michael S. HAWKINS, Edward G. ZWARTZ, Guerino G. SACRIPANTE
  • Publication number: 20080199797
    Abstract: An emulsion aggregation toner composition includes toner particles including: an unsaturated polymeric resin, selected from amorphous resins, crystalline resins, and mixtures thereof; an optional colorant; an optional wax; an optional coagulant; and a photo initiator capable of initiating crosslinking of said unsaturated polymeric resin.
    Type: Application
    Filed: February 16, 2007
    Publication date: August 21, 2008
    Applicant: XEROX CORPORATION
    Inventors: Guerino G. SACRIPANTE, Jessica E. PUDWELL, Edward G. ZWARTZ, T. Brian MCANENEY
  • Publication number: 20080187855
    Abstract: A toner process that includes a first heating of a colorant dispersion, a first polyester resin free latex emulsion, a second polyester latex emulsion, and a wax dispersion in the presence of a coagulant containing a metal ion; adding a third polyester free latex; adding an organic sequestering compound or a silicate salt sequestering compound, followed by a second heating.
    Type: Application
    Filed: April 8, 2008
    Publication date: August 7, 2008
    Applicant: XEROX CORPORATION
    Inventors: Raj D. Patel, Guerino G. Sacripante, Edward G. Zwartz, Enno E. Agur, Allan K. Chen, T Hwee Ng, Kimberly D. Nosella, Cuong Vong, Karen A. Moffat
  • Publication number: 20080182193
    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: Application
    Filed: January 25, 2007
    Publication date: July 31, 2008
    Applicant: XEROX CORPORATION
    Inventors: Enno E. AGUR, Daryl W. VANBESIEN, Valerie M. FARRUGIA, Guerino G. SACRIPANTE, Maria N.V. MCDOUGALL, Edward G. ZWARTZ
  • Publication number: 20080182191
    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: Application
    Filed: January 31, 2007
    Publication date: July 31, 2008
    Applicant: XEROX CORPORATION
    Inventors: Karen A. MOFFAT, Edward G. ZWARTZ, T. Brian MCANENEY, Fernando P. YULO
  • Patent number: 7402371
    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: September 23, 2004
    Date of Patent: July 22, 2008
    Assignee: Xerox Corporation
    Inventors: Guerino G. Sacripante, Fatima M. Mayer, Kimberly D. Nosella, Valerie M. Farrugia, Raj D. Patel, Milan Maric, Allan K. Chen, Edward G. Zwartz, T. Hwee Ng
  • Publication number: 20080166651
    Abstract: A toner composition comprising a crosslinked resin, a substantially non-crosslinked resin, a was, and a colorant. The crosslinked resin has a crosslinked density of from about 0.3 percent to about 30 percent.
    Type: Application
    Filed: November 1, 2006
    Publication date: July 10, 2008
    Applicant: XEROX CORPORATION
    Inventors: Daryl W. VANBESIEN, Edward G. ZWARTZ, Karen A. MOFFAT, Emily L. MOORE, Shigang QIU
  • Publication number: 20080166649
    Abstract: A toner composition having toner particles comprising a gel latex, a high Tg latex, a wax, and a colorant. The gel latex is present in an amount of from about 3 weight percent to about 30 weight percent of the toner composition, the high Tg latex is present in an amount of from about 50 weight percent to about 95 weight percent of the toner composition, the wax is present in an amount of from about 2 weight percent to about 40 weight percent of the toner composition, and the colorant is present in an amount of from about 1 weight percent to about 25 weight percent of the toner composition.
    Type: Application
    Filed: December 13, 2006
    Publication date: July 10, 2008
    Applicant: Xerox Corporation
    Inventors: Karen A. Moffat, Emily L. Moore, Daryl W. Vanbesien, Shigang S. Qiu, Vladislav Skorokhod, Edward G. Zwartz, Juan A. Morales-Tirado, William H. Hollenbaugh
  • Patent number: 7390606
    Abstract: The toner includes emulsion aggregation toner particles having a core and a shell. The core includes binder including a first non-crosslinked styrene acrylate polymer and a crosslinked styrene acrylate polymer, at least one colorant, at least one wax, and aluminized silica. The shell includes a second non-crosslinked styrene acrylate polymer that is preferably the same as the non-crosslinked styrene acrylate polymer of the core. The aluminized silica is advantageously used as a coagulant in the emulsion aggregation formation of the toner. A developer containing the toner and a method of forming an image using the toner are also described.
    Type: Grant
    Filed: October 17, 2005
    Date of Patent: June 24, 2008
    Assignee: Xerox Corporation
    Inventors: Raj D. Patel, Edward G. Zwartz, Biritawit Asfaw
  • Publication number: 20080090163
    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: Application
    Filed: October 13, 2006
    Publication date: April 17, 2008
    Applicant: XEROX CORPORATION
    Inventors: Enno E. AGUR, Guerino G. SACRIPANTE, Michael S. HAWKINS, Edward G. ZWARTZ
  • Patent number: 7358021
    Abstract: A toner process that includes a first heating of a colorant dispersion, a first polyester resin free latex emulsion, a second polyester latex emulsion, and a wax dispersion in the presence of a coagulant containing a metal ion; adding a third polyester free latex; adding an organic sequestering compound or a silicate salt sequestering compound, followed by a second heating.
    Type: Grant
    Filed: January 27, 2005
    Date of Patent: April 15, 2008
    Assignee: Xerox Corporation
    Inventors: Raj D. Patel, Guerino G. Sacripante, Edward G. Zwartz, Enno E. Agur, Allan K. Chen, T Hwee Ng, Kimberly D. Nosella, Cuong Vong, Karen A. Moffat
  • Publication number: 20080075507
    Abstract: A process of MICR and non-MICR electrostatic magnetic imaging of two independent electrostatic latent images including a) optionally pre-treating a blank check with a wax-based coating comprising an aqueous polyethylene wax emulsion; (b) forming a first electrostatic latent image in a MICR printing apparatus; (c) developing the first electrostatic latent image by contacting the first electrostatic latent image with a MICR toner to produce a developed MICR toner image; (d) transferring and optionally fusing the developed MICR toner image onto a check; (e) forming a second electrostatic latent image in a non-MICR printing apparatus; (f) developing the second electrostatic latent image by contacting the second electrostatic latent image with a non-MICR toner to produce a developed non-MICR image; (g) transferring the developed non-MICR toner image to the check; (h) fusing the developed MICR toner image and the developed non-MICR toner image to the check, wherein a fuser oil is supplied to the check during fusing
    Type: Application
    Filed: September 18, 2006
    Publication date: March 27, 2008
    Inventors: Christine Anderson, T Brian McAneney, Kurt I. Halfyard, Edward G. Zwartz, Gordon Sisler