Patents by Inventor Robert C. U. Yu

Robert C. U. Yu 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).

  • Publication number: 20080014516
    Abstract: A photoconductor containing an optional supporting substrate, a photogenerating layer, and at least one silanol containing charge transport layer.
    Type: Application
    Filed: July 12, 2006
    Publication date: January 17, 2008
    Inventors: Jin Wu, Kenny-Tuan Dinh, Kathleen M. Carmichael, Susan M. Vandusen, Liang-Bih Lin, Michael S. Roetker, Robert C.U. Yu
  • Publication number: 20070292797
    Abstract: The presently disclosed embodiments are directed to anticurl back coatings useful in electrostatography. More particularly, the embodiments pertain to an electrophotographic imaging member with an improved anticurl back coating formulated by a polymer blend comprising two low surface energy polymeric materials that prevents curling, renders surface lubricity, eliminates electrostatic charge buildup, reduces surface contact friction, and enhances abrasion/wear resistance, and a process for making and using the imaging member.
    Type: Application
    Filed: June 20, 2006
    Publication date: December 20, 2007
    Applicant: Xerox Corporation
    Inventors: Robert C.U. Yu, Stephen T. Avery, Edward F. Grabowski, Satish Parikh, Donald J. Goodman
  • Patent number: 7297457
    Abstract: An imaging member having a substrate, a charge transport layer having a polymer and a first charge transport material dispersed therein, and wherein the charge transport layer has a glass transition temperature of from about 10 to about 45° C.; and an overcoat layer on the charge transport layer, wherein the overcoat layer includes a second polymer and a second charge transport material dispersed therein.
    Type: Grant
    Filed: November 18, 2004
    Date of Patent: November 20, 2007
    Assignee: Xerox Corporation
    Inventors: Anthony M. Horgan, Robert C. U. Yu, Satchidanand Mishra, Richard L. Post, Edward F. Grabowski, Min-Hong Fu, Kathleen M. Carmichael, David M. Skinner
  • Patent number: 7291428
    Abstract: An electrophotographic imaging member having a charge generating layer and a charge transport layer overlayed thereon is provided. The charge transport layer has a lower surface and an upper surface, wherein the lower surface is in contiguous contact with the charge generating layer. The charge transport layer comprises a film forming polymer binder and a charge transport compound molecularly dispersed or dissolved therein to form a solid solution. The concentration of the charge transport compound in the charge transport layer decreases from the lower surface to the upper surface. In such a construction, the resulting charge transport layer exhibits enhanced cracking suppression, improved wear resistance, excellent imaging member electrical performance, and improved copy print out quality.
    Type: Grant
    Filed: December 15, 2006
    Date of Patent: November 6, 2007
    Assignee: Xerox Corporation
    Inventors: Satchidanand Mishra, Anthony M. Horgan, Robert C. U. Yu, Dasarao K. Murti, Suresh K. Ahuja
  • Patent number: 7280791
    Abstract: A weldable intermediate transfer belt having a substrate with a homogeneous composition of polyaniline in an amount of from about 2 to about 25 percent by weight of total solids, and a thermoplastic polyimide in an amount of from about 75 to about 98 percent by weight of total solids, and the polyaniline has a particle size of from about 0.5 to about 5.0 microns, and an apparatus for forming images on a recording medium and incorporating the intermediate transfer belt.
    Type: Grant
    Filed: June 5, 2006
    Date of Patent: October 9, 2007
    Assignee: Xerox Corporation
    Inventors: Donald J. Goodman, Satish R. Parikh, Edward F. Grabowski, Matthew J. Torpey, M John Hinckel, Michael S. Roetker, Markus R. Silvestri, John J. Darcy, III, David W. Martin, Scott J. Griffin, Felix J. Santana, Robert J. Flanagan, Joellen Simone, Robert C. U. Yu, John P. Kerwawycz, Satchidanand Mishra
  • Publication number: 20070141488
    Abstract: In imaging member comprising a charge generating layer, a charge transport layers and an optional barrier layer between the charge generating layer and the charge transport layer. The charge transport layer may comprise a first and a second or more layers, wherein the first layer comprises a film-forming polymer having hole-transporting capability, but does not contain charge transport molecules.
    Type: Application
    Filed: June 20, 2006
    Publication date: June 21, 2007
    Inventor: Robert C.U. Yu
  • Patent number: 7194227
    Abstract: Disclosed are various embodiments of a belt support module design for use in an imaging forming apparatus or machine. The belt support module is utilized in association with an electrostatographic imaging belt. The belt support module has at least one flexible spreader roller to suppress, or effect the elimination of, belt ripple or wrinkle development during machine belt cycling operation.
    Type: Grant
    Filed: August 10, 2004
    Date of Patent: March 20, 2007
    Assignee: Xerox Corporation
    Inventor: Robert C. U. Yu
  • Patent number: 7182903
    Abstract: Multilayered web stock is directed toward a curved surface and at least one layer of the web stock is heated to a temperature above a glass transition temperature of the at least one layer of the web stock. The heating can occur just before or upon engaging the curved surface. The temperature of the at least one layer remains above the glass transition temperature while engaging the curved surface, allowing reshaping and/or realignment of the at least one layer relative to other layers of the web stock according to conformance to the curved surface. The web stock is cooled before it disengages from the curved surface. The heating can be done with a high power infrared lamp focused into a line across the web stock, and the cooling can be done with a cooled fluid jet. Additionally, a preheater can be employed, and a supplemental cooler can be used.
    Type: Grant
    Filed: March 7, 2003
    Date of Patent: February 27, 2007
    Assignee: Xerox Corporation
    Inventors: Robert C. U. Yu, Satchidanand Mishra, Anthony M. Horgan, Richard L. Post, Edward F. Grabowski, Tsu-sen Chow, John A. Bergfjord, Sr., Miguel A. Boscan, John J. Darcy, III, Michael S. Roetker, Scott J. Griffin
  • Patent number: 7166399
    Abstract: An electrostatographic imaging member having a charge-retentive surface and a substrate, an imaging layer to receive an electrostatic latent image thereon, wherein the imaging layer is positioned on one side of the substrate, and an anti-curl backing layer positioned on the substrate on a side opposite to that of the imaging layer, wherein the anti-curl backing layer has a polymer binder and lignin sulfonic acid doped polyaniline, and an image forming apparatus having the above imaging member or photoreceptor to receive an electrostatic latent image on a charge-retentive surface of the photoreceptor or imaging member; a development component to apply toner to the charge-retentive surface to develop the electrostatic latent image to form a developed image on the charge-retentive surface; a transfer member to transfer the developed image from the charge-retentive surface to a copy substrate; and a fixing component to fuse the developed image to the copy substrate.
    Type: Grant
    Filed: April 14, 2004
    Date of Patent: January 23, 2007
    Assignee: Xerox Corporation
    Inventors: Kathleen M. Carmichael, Robert C. U. Yu, Richard L. Post, Anthony M. Horgan, Satchidanand Mishra, Edward F. Grabowski, Satish R. Parikh, Donald J. Goodman, David M. Skinner
  • Patent number: 7166397
    Abstract: An electrophotographic imaging member having a charge generating layer and a charge transport layer overlayed thereon is provided. The charge transport layer has a lower surface and an upper surface, wherein the lower surface is in contiguous contact with the charge generating layer. The charge transport layer comprises a film forming polymer binder and a charge transport compound molecularly dispersed or dissolved therein to form a solid solution. The concentration of the charge transport compound in the charge transport layer decreases from the lower surface to the upper surface. In such a construction, the resulting charge transport layer exhibits enhanced cracking suppression, improved wear resistance, excellent imaging member electrical performance, and improved copy print out quality.
    Type: Grant
    Filed: December 23, 2003
    Date of Patent: January 23, 2007
    Assignee: Xerox Corporation
    Inventors: Satchidanand Mishra, Anthony M. Horgan, Robert C. U. Yu, Dasarao K. Murti, Suresh K. Ahuja
  • Patent number: 7150950
    Abstract: An electrostatographic imaging member having a flexible supporting substrate, an imaging layer capable of retaining an electrostatic latent image, and an electrically conductive ground strip layer comprising a film forming binder and a lignin sulfonic acid doped polyaniline dispersion, and an image forming apparatus with the above imaging member to receive an electrostatic latent image on a charge-retentive surface of the imaging member; a development component to apply toner to the charge-retentive surface to develop the electrostatic latent image to form a developed toner image on the charge-retentive surface; a transfer component to transfer the developed toner image from the charge-retentive surface to a receiving copy substrate; and a fixing component to fuse the developed image to the receiving copy substrate.
    Type: Grant
    Filed: April 14, 2004
    Date of Patent: December 19, 2006
    Assignee: Xerox Corporation
    Inventors: Robert C. U. Yu, Satchidanand Mishra, Anthony M. Horgan, Richard L. Post, Edward F. Grabowski, Kathleen M. Carmichael, Satish Parikh, Bing R. Hsieh, Donald C. VonHoene
  • Patent number: 7130569
    Abstract: A weldable intermediate transfer belt having a substrate with a homogeneous composition of polyaniline in an amount of from about 2 to about 25 percent by weight of total solids, and a thermoplastic polyimide in an amount of from about 75 to about 98 percent by weight of total solids, and the polyaniline has a particle size of from about 0.5 to about 5.0 microns, and an apparatus for forming images on a recording medium and incorporating the intermediate transfer belt.
    Type: Grant
    Filed: July 2, 2004
    Date of Patent: October 31, 2006
    Assignee: Xerox Corporation
    Inventors: Donald J. Goodman, Satish R. Parikh, Edward F. Grabowski, Matthew J. Torpey, M John Hinckel, Michael S. Roetker, Markus R. Silvestri, John J. Darcy, III, David W. Martin, Scott J. Griffin, Felix J. Santana, Robert J. Flanagan, Joellen Simone, Robert C. U. Yu, John P. Kerwawycz, Satchidanand Mishra
  • Patent number: 7094509
    Abstract: A photoconductive imaging member comprised of a photogenerating layer, and a charge transport layer containing a binder and a fluoropolymer generated by the free radical polymerization of a fluoroalkyl(methyl)acrylate and an alkyl(methyl)acrylate.
    Type: Grant
    Filed: July 18, 2003
    Date of Patent: August 22, 2006
    Assignee: Xerox Corporation
    Inventors: Yuhua Tong, Timothy J. Fuller, Cindy C. Chen, John F. Yanus, Robert C. U. Yu, Min-Hong Fu, Lanhui Zhang, Dennis J. Prosser, Susan M. VanDusen
  • Patent number: 7094048
    Abstract: Apparatus comprising a support member having a flat surface adapted to receive and support a seam region of a flexible belt comprising thermoplastic polymer material having a predetermined glass transition temperature, a heatable member having a smooth heatable flat surface for compressing at least a portion of the seam region of a flexible belt placed on the smooth flat surface of the support member to heat the portion to at least the glass transition temperature of the thermoplastic polymer material, the smooth surface of the heatable member having a profile which is parallel to the smooth flat surface of the support member, and wherein the heatable flat surface comprises a low surface energy or abhesive material.
    Type: Grant
    Filed: June 26, 2001
    Date of Patent: August 22, 2006
    Assignee: Xerox Corporation
    Inventors: Satchidanand Mishra, Robert C. U. Yu, Anthony M. Horgan, Bing R. Hsieh, Donald C. VonHoene, Edward F. Grabowski, Richard L. Post, Edward A. Domm
  • Patent number: 7045262
    Abstract: A photoconductive imaging member comprised of a photogenerating layer and a charge transport layer, and wherein the charge transport layer contains a polymeric solid acid.
    Type: Grant
    Filed: January 22, 2004
    Date of Patent: May 16, 2006
    Assignee: Xerox Corporation
    Inventors: Yuhua Tong, Satchidanand Mishra, Anthony M. Horgan, John F. Yanus, Dale S. Renfer, Robert C. U. Yu, Markus R. Silvestri, Cindy C. Chen, Lanhui Zhang
  • Patent number: 7031647
    Abstract: A belt having a substrate with a first binder and a lignin sulfonic acid doped polyaniline dispersion, along with an image forming apparatus for forming images on a recording medium and having a charge-retentive surface to receive an electrostatic latent image thereon, a development component to apply toner to the charge-retentive surface to develop the electrostatic latent image to form a developed toner image on the charge retentive surface, a transfer member to transfer the developed image from the charge retentive surface to a copy substrate, and the transfer member has a substrate with a binder and a dispersion of lignin sulfonic acid doped polyaniline, and further, a fixing component to fuse the developed image to the copy substrate.
    Type: Grant
    Filed: April 14, 2004
    Date of Patent: April 18, 2006
    Assignee: Xerox Corporation
    Inventors: Satchidanand Mishra, Robert C. U. Yu, Richard L. Post, Anthony M. Horgan, Edward F. Grabowski, Kathleen M. Carmichael, Satish R. Parikh, Bing R. Hsieh, Donald C. VonHoene
  • Patent number: 7008741
    Abstract: A photoconductive imaging member containing a photogenerating layer, a charge transport layer, or a plurality of charge transport layers, and which charge transport, especially the top charge transport layer contains a vinyl containing organic compound.
    Type: Grant
    Filed: April 24, 2003
    Date of Patent: March 7, 2006
    Assignee: Xerox Corporation
    Inventors: Robert C. U. Yu, Satchidanand Mishra, Anthony M. Horgan, Richard L. Post, Yuhua Tong, Edward F. Grabowski, Kathleen M. Carmichael, Markus R. Silvestri
  • Patent number: 6970669
    Abstract: A belt loading apparatus has been provided for loading a flimsy continuous belt onto a belt support and drive assembly including a vertical front end having a first shape and without damage to the belt. The belt loading apparatus includes a wall member defining a sleeve including an outer surface having a total outer surface area, a first edge and a second and opposite edge. The second edge has a vertical profile having a second shape such that the second shape of the second edge is a mirror image of the first shape of the belt support and drive assembly. The belt loading apparatus then includes friction reducing members formed on the outer surface of the sleeve for temporarily supporting and spacing a flimsy continuous belt to be loaded onto the belt support and drive assembly. The friction reducing members each have a belt contact area such that a sum total of belt contact areas of all the friction reducing members is significantly less than the total outer surface area of the sleeve.
    Type: Grant
    Filed: November 21, 2003
    Date of Patent: November 29, 2005
    Assignee: Xerox Corporation
    Inventors: Satchidanand Mishra, Satish R. Parikh, Robert C. U. Yu, Edward A. Domm
  • Patent number: 6939652
    Abstract: The present invention relates to a flexible electrostatographic imaging member. The electrostatographic imaging member contains an optically transparent thermoplastic anti-curl back coating, which enables the imaging member to maintain desirable structural flatness, mechanical robustness, flexibility, longevity, and copy image qualities over extended use. The present invention also relates to a process of fabricating a flexible electrostatographic imaging member.
    Type: Grant
    Filed: October 15, 2002
    Date of Patent: September 6, 2005
    Assignee: Xerox Corporation
    Inventor: Robert C. U. Yu
  • Patent number: 6933089
    Abstract: A charge transport layer for an imaging member comprising a dual charge transport layer and wherein the charge transport layers comprise a photogenerating layer; (1) a first charge transport layer comprised of a charge transport component and a resin binder; and thereover and in contact with the first layer; (2) a second top charge transport layer comprised of a charge transport component, a resin binder and a hindered phenol dopant. The charge transport layer exhibits, excellent electrical performance, outstanding print quality and reduces the diffusion of the anti-oxidant into the charge generator layer.
    Type: Grant
    Filed: December 16, 2002
    Date of Patent: August 23, 2005
    Assignee: Xerox Corporation
    Inventors: Anthony M. Horgan, Satchidanand Mishra, Robert C. U. Yu, Kathleen M. Carmichael, Kent J. Evans, Timothy J. Fuller, Colleen A. Helbig, John F. Yanus, Damodar M. Pai, Karen S. Garland