Patents by Inventor Kock-Yee Law

Kock-Yee Law 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: 8226207
    Abstract: A coating for an ink jet printhead front face, wherein the coating comprises a low adhesion coating, wherein when the low adhesion coating is disposed on an ink jet printhead front face surface, jetted drops of ultra-violet gel ink or jetted drops of solid ink exhibit a low sliding angle with the printhead front face surface, wherein the low sliding angle is less than about 1° to less than about 30°. In embodiments, the low adhesion coating is an oleophobic coating that exhibits a contact angle of greater than about 35° with ultra-violet gel ink or solid ink.
    Type: Grant
    Filed: November 24, 2009
    Date of Patent: July 24, 2012
    Assignee: Xerox Corporation
    Inventors: Gregory J. Kovacs, Kock-Yee Law, Hong Zhao, Varun Sambhy
  • Publication number: 20120183307
    Abstract: An electrostatic latent image is formed when the print controller of a print engine wirelessly transmits digital printing signals. Driving electronics receives the wirelessly transmitted digital printing signals and transmits digital signals to address plurality of thin-film transistors (TFTs) individually in a TFT array. Driving electronics also transmit pixel voltages to bias individual TFTs in the TFT array which in turn drives the hole injecting pixels overcoated with a charge transport layer to generate the electrostatic latent image on the surface of the charge transport layer in response to the received digital printing signals.
    Type: Application
    Filed: January 18, 2011
    Publication date: July 19, 2012
    Applicant: XEROX CORPORATION
    Inventors: Kock-Yee Law, Mandakini Kanugo
  • Patent number: 8211601
    Abstract: The presently disclosed embodiments relate generally to layers that are useful in imaging apparatus members and components, for use in electrostatographic, including digital, apparatuses. More particularly, the embodiments pertain to an improved electrostatographic imaging member incorporating a thermoplastic material pre-compounded to impart conductivity to the anti-curl back coating layer and may also contain an adhesion promoter which provides a conductively and optically anti-curl back coating layer. The conductive anti-curl back coating of the present disclosure may be formulated to have a single layer, dual layers, or triple layers.
    Type: Grant
    Filed: April 24, 2009
    Date of Patent: July 3, 2012
    Assignee: Xerox Corporation
    Inventors: Robert C. U. Yu, Yuhua Tong, Edward F. Grabowski, Kock-Yee Law
  • Patent number: 8213849
    Abstract: Systems and methods of inductively heating a fuser member in an electrophotographic device are disclosed. The systems and methods can include a heating component with a susceptor layer comprising carbon nanotubes (CNTs). An excitation unit with an electrical coil can be positioned a proximate distance from the heating component. Current through the electrical coil can inductively heat the susceptor layer and the heating component. The heat from the susceptor layer and the heating component can be used to fuse toner onto an image-receiving substrate. The CNTs can reduce electronic hardware costs in the electrophotographic device in relation to the costs associated with conventional materials.
    Type: Grant
    Filed: July 20, 2009
    Date of Patent: July 3, 2012
    Assignee: Xerox Corporation
    Inventors: Gerald A. Domoto, Nicholas P. Kladias, Kock-yee Law, Hong Zhao
  • Publication number: 20120154487
    Abstract: Various embodiments provide oleophobic, low adhesion coatings with high thermal stability and methods of forming and using them in an ink jet printhead, wherein the oleophobic, low adhesion coatings can include a sol-gel cross-linked coating by a self-condensation process of at least a silane-functionalized perfluoropolyether based polymer precursor.
    Type: Application
    Filed: December 15, 2010
    Publication date: June 21, 2012
    Applicant: XEROX CORPORATION
    Inventors: Varun Sambhy, Kock-Yee Law, Hong Zhao, Samarth Chugh
  • Patent number: 8204407
    Abstract: Exemplary embodiments provide methods, materials and devices for a corona charging. Specifically, carbon nanotube yarns can be used as corona wires (or coronode) in a corotron-type or scorotron-type charging device. The carbon nanotube yarns can provide small diameters, and desired electrical, mechanical and thermal properties. The carbon nanotube yarns can have a diameter of about 100 microns or less for a low operating voltage of the charging device.
    Type: Grant
    Filed: April 3, 2008
    Date of Patent: June 19, 2012
    Assignee: Xerox Corporation
    Inventors: Michael F. Zona, Kock-yee Law
  • Publication number: 20120147111
    Abstract: A printing machine for transferring a phase change ink onto a print medium includes a component for applying a phase change ink in an image, an imaging member for accepting the image and transferring the image from the imaging member to the print medium and a pressure member positioned in association with the imaging member to form a nip through which the print medium passes. The pressure member includes an outer layer with a tailored electrical conductivity to eliminate ghosting in duplex printing modes. The outer layer comprises a composite of a polymer and carbon nanotubes and/or graphenes. A similar outer layer may be implemented on a pressure roller in a direct-to-paper printing machine.
    Type: Application
    Filed: February 21, 2012
    Publication date: June 14, 2012
    Applicant: Xerox Corporation
    Inventors: Santokh S. Badesha, Paul John McConville, James Edward Williams, Kock-Yee Law
  • Patent number: 8192005
    Abstract: A printer for transferring a phase-change ink onto a substrate includes components for conveying the substrate along a path through the printing machine, a printing station including a plurality of printheads disposed along the path and configured to transfer the phase-change solid ink onto the substrate as it is conveyed along the path, a plurality of metal backing rollers facing the plurality of printheads and arranged to support to the substrate passing between the backing rollers and the printheads, and a spreader station receiving the substrate from the printing station and configured to spread the phase-change solid ink on the substrate, the spreader station including a spreader roller and a metal pressure roller opposing the spreader roller. Each of the non-oiled metal rollers includes a coating that is oleophobic that has low adhesion toward the solid ink image but sufficient lateral friction as to not slide against the ink or paper web.
    Type: Grant
    Filed: July 29, 2009
    Date of Patent: June 5, 2012
    Assignee: Xerox Corporation
    Inventors: Kock-Yee Law, Paul John McConville, James Edward Williams
  • Patent number: 8173340
    Abstract: Embodiments pertain to a novel imaging member, namely, an electrostatic latent image generating member that can generate an electrostatic latent image digitally without using a raster output scanner (ROS), photoreceptor and charger. The imaging member facilitates the charge injection process between an organic conjugated polymer and N,N?-diphenyl-N,N?bis(3-methylphenyl)-[1,1?-biphenyl]-4,4?diamine charge transport layer.
    Type: Grant
    Filed: August 11, 2009
    Date of Patent: May 8, 2012
    Assignee: Xerox Corporation
    Inventors: Mandakini Kanungo, Kock-Yee Law
  • Patent number: 8168287
    Abstract: The present teachings provide a fuser member. The fuser member includes a substrate, a functional layer disposed on the substrate, and an outer layer disposed on the functional layer. The outer layer includes silicon having a texture, and a conformal oleophobic coating disposed on the silicon.
    Type: Grant
    Filed: February 25, 2010
    Date of Patent: May 1, 2012
    Assignee: Xerox Corporation
    Inventors: Kock-Yee Law, Hong Zhao
  • Patent number: 8142967
    Abstract: The presently disclosed embodiments relate generally to layers that are useful in imaging apparatus members and components, for use in electrostatographic, including digital, apparatuses. More particularly, the embodiments pertain to an improved electrostatographic imaging member incorporating a carbon nano tube dispersion into a high molecular weight polycarbonate and an anti-static copolymer with polyester, polycarbonate, and polyethylene glycol units in a formulation for the anti-curl back coating layer which provides a conductively suitable and stable dispersion coating solution for making an optically suitable anti-curl back coating layer.
    Type: Grant
    Filed: March 18, 2009
    Date of Patent: March 27, 2012
    Assignee: Xerox Corporation
    Inventors: Yuhua Tong, Edward F. Grabowski, Donald J. Goodman, Kock-Yee Law, Robert C. U. Yu
  • Patent number: 8132451
    Abstract: A system, method and device for measuring toner performance by randomly applying a toner sample having toner particles to a substrate, and positioning the substrate such that a force may be applied to individual particles of the measuring toner. A rolling resistance or rotation of the individual particles of the measuring toner is measured. The measurements may be analyzed to determine adhesion and distribution properties of individual toner particles of the measuring toner sample.
    Type: Grant
    Filed: June 10, 2009
    Date of Patent: March 13, 2012
    Assignee: Xerox Corporation
    Inventors: Kock-Yee Law, Grazyna E. Kmiecik-Lawrynowicz, Weiqiang Ding, Cetin Cetinkaya
  • Publication number: 20120052436
    Abstract: Various embodiments provide systems and methods for direct digital marking, wherein an electrostatic latent image or a surface charge contrast can be formed and developed at a development nip formed by a nano-enabled imaging member and a negatively-biased development subsystem.
    Type: Application
    Filed: August 26, 2010
    Publication date: March 1, 2012
    Applicant: XEROX CORPORATION
    Inventors: Kock-Yee LAW, Yuanjia ZHANG, Mandakini KANUNGO
  • Publication number: 20120044298
    Abstract: A coating for an ink jet printhead front face, wherein the coating comprises a oleophobic low adhesion coating. When the oleophobic low adhesion coating is disposed on an ink jet printhead front face surface, jetted drops of ultra-violet gel ink or jetted drops of solid ink exhibit a contact angle greater than 45° and a low sliding angle of less than about 30°. In embodiments, the oleophobic low adhesion coating is thermally stable wherein the surface contact angle and sliding angle show little degradation after the coating is subjected to high temperatures in a range between 180° and 320° or thereabout and high pressures in a range between 100 psi and 400 psi or thereabout during printhead fabrication and manufacturing.
    Type: Application
    Filed: August 20, 2010
    Publication date: February 23, 2012
    Applicant: XEROX CORPORATION
    Inventors: Varun Sambhy, Kock-Yee Law, Hong Zhao, Samarth Chugh
  • Publication number: 20120045715
    Abstract: The presently disclosed embodiments relate generally to the formulation of an anticurl back coating layer that renders imaging apparatus flexible members and components their desirable flatness, for use in electrostatographic, including digital apparatuses. More particularly, the embodiments pertain to an imaging member comprising an anticurl back coating layer formulated to comprise conductive carbon nanotubes dispersion in a polymer blend comprising three film-forming thermoplastic polymers to: (a) render electrical conductivity effect for tribo-electrical charge elimination (b) impart static dissipation capability, and (c) provide surface energy lowering effect for contact friction reduction to ease imaging member belt drive as well as cutting tribo-electrical charge build-up under normal imaging member belt operational conditions in the field.
    Type: Application
    Filed: August 18, 2010
    Publication date: February 23, 2012
    Applicant: XEROX CORPORATION
    Inventors: Edward F. Grabowski, Robert C. U. Yu, Kock-Yee Law, Yuhua Tong
  • Publication number: 20120042518
    Abstract: A method for producing an inkjet printhead that includes aligning and stacking together an aperture plate and a plurality of jetstack plates; bonding together the aperture plate and plurality of jetstack plates; and depositing a layer of coating material to a surface of the aperture plate by inkjet printing to form a coating on at least a portion of the surface of the aperture plate.
    Type: Application
    Filed: August 20, 2010
    Publication date: February 23, 2012
    Applicant: XEROX CORPORATION
    Inventors: Kock-Yee LAW, Yuanjia Zhang, Varun Sambhy
  • Patent number: 8118421
    Abstract: A printing machine for transferring a phase change ink onto a print medium includes a component for applying a phase change ink in an image, an imaging member for accepting the image and transferring the image from the imaging member to the print medium and a pressure member positioned in association with the imaging member to form a nip through which the print medium passes. The pressure member includes an outer layer with a tailored electrical conductivity to eliminate ghosting in duplex printing modes. The outer layer comprises a composite of a polymer and carbon nanotubes and/or graphenes. A similar outer layer may be implemented on a pressure roller in a direct-to-paper printing machine.
    Type: Grant
    Filed: November 25, 2008
    Date of Patent: February 21, 2012
    Assignee: Xerox Corporation
    Inventors: Santokh S. Badesha, Paul John McConville, James Edward Williams, Kock-Yee Law
  • Publication number: 20120037026
    Abstract: Various embodiments provide systems and methods for digital offset/flexo printing by selectively addressing one or more hole-injecting pixels of a nano-enabled imaging member to form a latent image thereon, wherein the latent image can be electrostatically developed with an ink and then transferred from the nano-enabled imaging member onto a print media.
    Type: Application
    Filed: August 11, 2010
    Publication date: February 16, 2012
    Applicant: XEROX CORPORATION
    Inventors: Kock-Yee LAW, Mandakini Kanungo
  • Publication number: 20120039648
    Abstract: Various embodiments provide low adhesion coatings that can be used for an image-side member in an image fixing system of an electrophotographic printer or an ink jet printer, wherein the low adhesion coatings can exhibit a low sliding angle ranging from about 1° to about 30° with a solid ink, a toner, hexadecane and/or water.
    Type: Application
    Filed: August 12, 2010
    Publication date: February 16, 2012
    Applicant: XEROX CORPORATION
    Inventors: Varun Sambhy, Dale R. Mashtare, Kock-Yee Law, Rachael L. McGrath
  • Patent number: 8107843
    Abstract: In accordance with the invention, there are printing apparatuses and methods of marking and forming an image. The printing apparatus can include one or more digital heating elements disposed in a fuser subsystem, the digital heating element can include an array of hotplates, wherein each hotplate of the array of hotplates can be thermally isolated and can be individually addressable, wherein each hotplate can be configured to attain a temperature up to approximately 200° C. from approximately 20° C. in a time frame of milliseconds.
    Type: Grant
    Filed: April 1, 2008
    Date of Patent: January 31, 2012
    Assignee: Xerox Corporation
    Inventor: Kock-Yee Law