Patents by Inventor Doris Chun

Doris Chun 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: 10649302
    Abstract: A method of manufacturing a coating for an e-paper assembly includes forming a coating layer from conductive particles dispersed within an insulative matrix. A field is applied to cause the conductive particles to align in generally parallel, spaced apart elongate patterns that are generally perpendicular to a plane through which the coating layer extends. At ambient temperatures and without applied pressure, the coating layer is cured via radiation energy while maintaining the applied field.
    Type: Grant
    Filed: April 25, 2014
    Date of Patent: May 12, 2020
    Assignee: Hewlett-Packard Development Company, L.P.
    Inventors: Doris Chun, Napoleon J Leoni
  • Patent number: 10310353
    Abstract: A charge-receiving layer for an e-paper assembly includes a plurality of conductive paths spaced apart throughout an insulative matrix, with each conductive path including at least one elongate pattern of conductive particles.
    Type: Grant
    Filed: April 25, 2014
    Date of Patent: June 4, 2019
    Assignee: Hewlett-Packard Development Company, L.P.
    Inventors: Doris Chun, Napoleon J Leoni, Henryk Birecki, Omer Gila
  • Patent number: 9977373
    Abstract: A printer includes an image formation portion, a feed portion, and a transfer portion. The image formation portion transfers formed first and second patterned marking agent layers from a photoconductor member onto an intermediate transfer member. The feed portion directs a portion of a foil layer to become adhered, according to the pattern, onto the first marking agent layer on the intermediate transfer member before the second marking agent layer is transferred onto, and becomes adhered to, the foil portion. The transfer portion causes transfer of the foil portion from the intermediate transfer member, via transfer of at least the second marking agent layer from the intermediate transfer member, onto a substrate.
    Type: Grant
    Filed: August 13, 2013
    Date of Patent: May 22, 2018
    Assignee: Hewlett-Packard Development Company, L.P.
    Inventors: Doris Chun, Yaron Grinwald, Reut Avigdor
  • Patent number: 9921511
    Abstract: In an example of a method for making polymer-encapsulated metallic ink pigment particles, a layer of a transparent resin dispersion is disposed on a flexible substrate. The resin dispersion layer is substantially dried, and a base resin layer is formed. A slurry is disposed onto the base resin layer. The slurry includes metallic pigment particles and polymer particles dispersed in a non-aqueous carrier. The slurry is dried to form a metallic pigment-polymer sheet. Another layer of the transparent resin dispersion is disposed on the metallic pigment-polymer sheet and is dried. A coating resin layer is formed. The metallic pigment-polymer sheet and the base and coating transparent resin layers form a tri-layer film having the metallic pigment particles encapsulated between the base and coating transparent resin layers.
    Type: Grant
    Filed: April 28, 2014
    Date of Patent: March 20, 2018
    Assignee: Hewlett-Packard Development Company, L.P.
    Inventors: Lihua Zhao, Yan Zhao, Doris Chun, Sivapackia Ganapathiappan, Hou T. Ng, Albert Teishev
  • Patent number: 9714352
    Abstract: A dispersed white ink contains TiO2, wherein the TiO2 includes particles contained in a thermoplastic polymer resin matrix and wherein the particles have a maximum interparticle distance of less than 1.0 ?m and exhibit a statistical variance of less than 0.02. A process for manufacturing the dispersed white ink is also provided.
    Type: Grant
    Filed: March 31, 2014
    Date of Patent: July 25, 2017
    Assignee: Hewlett-Packard Development Company, L.P.
    Inventors: Doris Chun, Hou T. Ng, Albert Teishev
  • Publication number: 20170158889
    Abstract: A dispersed white ink contains TiO2, wherein the TiO2 includes particles contained in a thermoplastic polymer resin matrix and wherein the particles have a maximum interparticle distance of less than 1.0 ?m and exhibit a statistical variance of less than 0.02. A process for manufacturing the dispersed white ink is also provided.
    Type: Application
    Filed: March 31, 2014
    Publication date: June 8, 2017
    Inventors: Doris Chun, Hou T. Ng, Albert Teishev
  • Publication number: 20170052421
    Abstract: A charge-receiving layer for an e-paper assembly includes a plurality of conductive paths spaced apart throughout an insulative matrix, with each conductive path including at least one elongate pattern of conductive particles.
    Type: Application
    Filed: April 25, 2014
    Publication date: February 23, 2017
    Applicant: Hewlett-Packard Development Company, L.P.
    Inventors: Doris CHUN, Napoleon J. Leoni, Henryk Birecki, Omer Gila
  • Publication number: 20170052420
    Abstract: A method of manufacturing a coating for an e-paper assembly includes forming a coating layer from conductive particles dispersed within an insulative matrix. A field is applied to cause the conductive particles to align in generally parallel, spaced apart elongate patterns that are generally perpendicular to a plane through which the coating layer extends. At ambient temperatures and without applied pressure, the coating layer is cured via radiation energy while maintaining the applied field.
    Type: Application
    Filed: April 25, 2014
    Publication date: February 23, 2017
    Inventors: Doris CHUN, Napoleon J Leoni
  • Publication number: 20160370726
    Abstract: In an example of a method for making polymer-encapsulated metallic ink pigment particles, a layer of a transparent resin dispersion is disposed on a flexible substrate. The resin dispersion layer is substantially dried, and a base resin layer is formed. A slurry is disposed onto the base resin layer. The slurry includes metallic pigment particles and polymer particles dispersed in a non-aqueous carrier. The slurry is dried to form a metallic pigment-polymer sheet. Another layer of the transparent resin dispersion is disposed on the metallic pigment-polymer sheet and is dried. A coating resin layer is formed. The metallic pigment-polymer sheet and the base and coating transparent resin layers form a tri-layer film having the metallic pigment particles encapsulated between the base and coating transparent resin layers.
    Type: Application
    Filed: April 28, 2014
    Publication date: December 22, 2016
    Inventors: Lihua Zhao, Yan Zhao, Doris Chun, Sivapackia Ganapathiappan, Hou T. Ng, Albert Teishev
  • Patent number: 9442405
    Abstract: The present disclosure provides for compositions, methods, and systems directed towards a liquid electrophotographic ink comprising a carrier fluid, a pigment, a first resin, and a stable cross-linkable resin that is solvated or swellable with the carrier fluid, where the stable cross-linkable resin does not undergo cross-linking until a temperature of at least 110° C. and, once cross-linked, does not melt until a temperature of at least 300° C.
    Type: Grant
    Filed: October 25, 2011
    Date of Patent: September 13, 2016
    Assignee: Hewlett-Packard Development Company, L.P.
    Inventors: Doris Chun, Hou T. Ng, Albert Teishev
  • Publication number: 20160195836
    Abstract: A printer includes an image formation portion, a feed portion, and a transfer portion. The image formation portion transfers formed first and second patterned marking agent layers from a photoconductor member onto an intermediate transfer member. The feed portion directs a portion of a foil layer to become adhered, according to the pattern, onto the first marking agent layer on the intermediate transfer member before the second marking agent layer is transferred onto, and becomes adhered to, the foil portion. The transfer portion causes transfer of the foil portion from the intermediate transfer member, via transfer of at least the second marking agent layer from the intermediate transfer member, onto a substrate.
    Type: Application
    Filed: August 13, 2013
    Publication date: July 7, 2016
    Applicant: Hewlett-Packard Development Company, L.P.
    Inventors: Doris Chun, Yaron Grinwald, Reut Avigdor
  • Patent number: 9335649
    Abstract: A method of making a liquid electrophotographic (LEP) paste is disclosed herein. A base paste is made by forming a dispersion of a pigment and a non-polar carrier, adding a transparent resin dispersion to the pigment dispersion to form a dispersion mixture, and homogenizing the dispersion mixture. The transparent resin dispersion includes a polymer dispersed in a non-aqueous carrier. The homogenizing may be accomplished by agitating the dispersion mixture at a frequency of less than 1 kHz, thereby forming the paste.
    Type: Grant
    Filed: May 31, 2012
    Date of Patent: May 10, 2016
    Assignee: Hewlett-Packard Development Company, L.P.
    Inventor: Doris Chun
  • Patent number: 9244390
    Abstract: Techniques to determine concentration parameters of conductive liquid electrophoretic (LEP) inks are illustrated herein. In an example, a layer of conductive LEP ink is formed on a developer roller using electrostatic forces acting on the conductive LEP ink. A current is generated in response to a voltage between a measurement electrode and a developer roller. The current flows through the conductive LEP ink layer.
    Type: Grant
    Filed: July 31, 2012
    Date of Patent: January 26, 2016
    Assignee: Hewlett-Packard Development Company, L.P.
    Inventors: Quang P Lam, Doris Chun, Hou T. Ng
  • Patent number: 9244370
    Abstract: A method for making polymer-encapsulated metallic ink particles is disclosed herein. An ethylene-based polymeric resin powder is formed, and is mixed with a metallic pigment powder to form a powder mixture. The powder mixture is melted to form a metallic polymer melt. A non-polar carrier is added to the metallic polymer melt to form a slurry. The slurry is processed in a microfluidizer.
    Type: Grant
    Filed: January 5, 2012
    Date of Patent: January 26, 2016
    Assignee: Hewlett-Packard Development Company, L.P.
    Inventors: Doris Chun, Hou T. Ng, Albert Teishev
  • Patent number: 9156999
    Abstract: The present disclosure is drawn toward compositions, systems, and methods for printing of three-dimensional objects. In one embodiment, a liquid inkjettable material for 3-dimensional printing can comprise from 0.1 wt % to 10 wt % of a pigment, from 10 wt % to 90 wt % of a UV-curable polymer, and from 0.1 wt % to 70 wt % of a polymeric filler. Additionally, the liquid inkjettable material can be jettable from piezo electric inkjet printer nozzles and has acceptable decap performance measured by jetting a normal 50 picoliter ink drop within 10 electric firing pulses after the piezo electric inkjet printer nozzles have been fired and have been subsequently rested for 24 hours.
    Type: Grant
    Filed: July 28, 2011
    Date of Patent: October 13, 2015
    Assignee: Hewlett-Packard Development Company, L.P.
    Inventors: Hou T. Ng, Doris Chun
  • Patent number: 9104143
    Abstract: A liquid electrophotographic ink is disclosed. The liquid electrophotographic ink includes a carrier liquid, a polymer resin, and a pearlescent pigment particle.
    Type: Grant
    Filed: November 20, 2013
    Date of Patent: August 11, 2015
    Assignee: Hewlett-Packard Development Company, L.P.
    Inventors: Doris Chun, Quang P Lam, Hou T Ng
  • Publication number: 20150111149
    Abstract: A method of making a liquid electrophotographic (LEP) paste is disclosed herein. A base paste is made by forming a dispersion of a pigment and a non-polar carrier, adding a transparent resin dispersion to the pigment dispersion to form a dispersion mixture, and homogenizing the dispersion mixture. The transparent resin dispersion includes a polymer dispersed in a non-aqueous carrier. The homogenizing may be accomplished by agitating the dispersion mixture at a frequency of less than 1 kHz, thereby forming the paste.
    Type: Application
    Filed: May 31, 2012
    Publication date: April 23, 2015
    Inventor: Doris Chun
  • Publication number: 20150071665
    Abstract: Techniques to determine concentration parameters of conductive liquid electrophoretic (LEP) inks are illustrated herein. In an example, a layer of conductive LEP ink is formed on a developer roller using electrostatic forces acting on the conductive LEP ink. A current is generated in response to a voltage between a measurement electrode and a developer roller. The current flows through the conductive LEP ink layer.
    Type: Application
    Filed: July 31, 2012
    Publication date: March 12, 2015
    Inventors: Quang P. Lam, Doris Chun, Hou T. Ng
  • Publication number: 20140342279
    Abstract: A method for making polymer-encapsulated metallic ink particles is disclosed herein. An ethylene-based polymeric resin powder is formed, and is mixed with a metallic pigment powder to form a powder mixture. The powder mixture is melted to form a metallic polymer melt. A non-polar carrier is added to the metallic polymer melt to form a slurry. The slurry is processed in a microfluidizer.
    Type: Application
    Filed: January 5, 2012
    Publication date: November 20, 2014
    Inventors: Doris Chun, Hou T. Ng, Albert Teishev
  • Publication number: 20140287357
    Abstract: The present disclosure provides for compositions, methods, and systems directed towards a liquid electrophotographic ink comprising a carrier fluid, a pigment, a first resin, and a stable cross-linkable resin that is solvated or swellable with the carrier fluid, where the stable cross-linkable resin does not undergo cross-linking until a temperature of at least 110° C. and, once cross-linked, does not melt until a temperature of at least 300° C.
    Type: Application
    Filed: October 25, 2011
    Publication date: September 25, 2014
    Inventors: Doris Chun, Hou T. Ng, Albert Teishev