Patents by Inventor Robert Yu

Robert 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: 20070092813
    Abstract: An imaging member having a charge transport layer is provided. The charge transport layer includes a plurality of charge transport layers coated from solutions of similar or different compositions or concentrations, wherein the upper or additional transport layer(s) comprise a lower concentration of charge transport compound than the first (bottom) charge transport layer. The charge transport compound included in the first (bottom) charge transport layer may either be the same or different from that included in the additional charge transport layers. The charge transport compound in one or more of the layers is dissolved or molecularly dispersed in an electrically inactive polymer material to form a solid solution. In such a construction, the resulting charge transport layer exhibits enhanced cracking suppression, improves wear resistance, provides excellent imaging member electrical performance, and delivers improved print quality.
    Type: Application
    Filed: November 16, 2006
    Publication date: April 26, 2007
    Inventors: Anthony Horgan, Robert Yu, Satchidanand Mishra, Richard Post, Edward Grabowski, Kathleen Carmichael, John Lambie, Houy Yuh, Timothy Fuller, John Yanus, Markus Silvestri, Yuhua Tong, Dale Renfer, Kenny-Tuan Dinh, Geoffrey Foley
  • Publication number: 20070082282
    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: Application
    Filed: December 15, 2006
    Publication date: April 12, 2007
    Inventors: Satchidanand Mishra, Anthony Horgan, Robert Yu, Dasarao Murti, Suresh Ahuja
  • Publication number: 20070059623
    Abstract: The presently disclosed embodiments are directed to anticurl back coatings useful in electrophotography. More particularly, the embodiments pertain to an electrophotographic imaging member with an improved anticurl back coating including a low surface energy polymeric material to prevent curling, render surface lubricity, eliminate electrostatic charge built-up, and reduce friction, and a process for making and using the member.
    Type: Application
    Filed: September 15, 2005
    Publication date: March 15, 2007
    Applicant: Xerox Corporation
    Inventor: Robert Yu
  • Publication number: 20070059622
    Abstract: The presently disclosed embodiments relate in general to electrophotographic imaging members, such as layered photoreceptor structures, and processes for making and using the same. More particularly, the embodiments pertain to an improved electrophotographic imaging member having a protective overcoat layer comprising a low surface energy polymeric material to enhance the imaging member physical/mechanical function as well as render its service life extension and a process for making and using the member.
    Type: Application
    Filed: July 28, 2006
    Publication date: March 15, 2007
    Applicant: Xerox Corporation
    Inventors: Robert Yu, Stephen Avery, Kathleen Carmichael
  • Publication number: 20070054208
    Abstract: An imaging member having an enhanced anti-curl back coating is disclosed. The anti-curl back coating comprises a liquid oligomer. Additionally, a slip agent can also be included. The resulting anti-curl back coating contains little to no residual solvent, shows improved resistance to wear and ozonolysis, and increased lubricity to prevent static charge built-up.
    Type: Application
    Filed: September 7, 2005
    Publication date: March 8, 2007
    Inventor: Robert Yu
  • Publication number: 20070023133
    Abstract: There is provided a process for producing a seamed, flexible electrostatographic imaging member belt comprising providing a flexible, substantially rectangular, electrostatographic imaging sheet having a first major exterior surface opposite and parallel to a second major exterior surface and a first marginal end region of said sheet opposite and parallel with a second marginal end region; shaping said first marginal end region at an angle to form a first new sloping surface between the first major exterior surface and the second major exterior surface, shaping said second marginal end region at an angle to form a second new sloping surface between the first major exterior surface and the second major exterior surface, wherein the second new sloping surface is substantially parallel with the first new sloping surface; forming the sheet into a loop and overlapping said first new sloping surface with said second new sloping surface to form a mated region; and, joining said first new sloping surface to said seco
    Type: Application
    Filed: July 29, 2005
    Publication date: February 1, 2007
    Inventors: Michael Roetker, Donald Laflair, David Martin, Felix Santana, John Darcy, Scott Griffin, Robert Yu
  • Publication number: 20070022861
    Abstract: There is provided an apparatus for producing a cross-sectional angular surface along a substrate, such as a flexible electrostatographic imaging member belt, comprising a cutting blade that is angled at an angle of less than 90° relative to a plane of an associated substrate to be cut. An apparatus may include a support body, and a blade support member connected to the blade support body. The blade support member comprises a cutting blade having a blade edge. The cutting blade may be positioned, in some embodiments, at an angle of less than 45°, and in other embodiments from about 5° to about 15° relative to a plane of an associated substrate to be cut. The cutting assembly may be used to form a sloping surface on each of first and second marginal end regions of a substrate, such as a flexible electrostatographic imaging member belt, wherein the second sloping surface is substantially parallel with the first new sloping surface.
    Type: Application
    Filed: July 29, 2005
    Publication date: February 1, 2007
    Inventors: Michael Roetker, Donald Laflair, David Martin, Felix Santana, John Darcy, Scott Griffin, Robert Yu
  • Publication number: 20070015073
    Abstract: An electrophotographic imaging member having a thermoplastic charge transport layer comprising a charge transport compound, a polycarbonate polymer binder, a particulate dispersion, and a high boiler compatible organic liquid. The disclosed charge transport layer exhibits enhanced wear resistance, excellent photoelectrical properties, and good print quality.
    Type: Application
    Filed: July 14, 2005
    Publication date: January 18, 2007
    Inventors: Liang-Bih Lin, Robert Yu, Francisco Lopez, Jin Wu, John Chambers
  • Publication number: 20060284194
    Abstract: An imaging member includes an electrically conductive layer; a positive charge blocking layer, an imaging layer, and an undercoat layer. The undercoat layer is intermediate the imaging layer and the electrically conductive layer. The undercoat layer includes a film forming polymer and a particulate material dispersed therein. The particulate material supports a charge blocking material thereon.
    Type: Application
    Filed: June 20, 2005
    Publication date: December 21, 2006
    Inventors: Satchidanand Mishra, Robert Yu, Kathleen Carmichael
  • Publication number: 20060216559
    Abstract: A fuel cell that includes at least two elementary cells for exothermic combustive reaction, including a heat source and an internal channel, formed between the cells for the circulation of a cooling fluid, which forms a cooling source. The cell includes a number of thermoelectric modules, each made of a couple of two conducting material elements of differing nature, a first end of each couple being in thermal contact with the heat source or the cooling source, the second end of each of the elements of the couple being in contact with the other source and electrically connected to an adjacent module.
    Type: Application
    Filed: June 14, 2004
    Publication date: September 28, 2006
    Inventors: Gerard Olivier, Sebastien Samuel, Robert Yu
  • Publication number: 20060216618
    Abstract: Disclosed herein is a flexible imaging member having a high concentration of a charge transport compound having optimum enhanced mechanical and electrical characteristics. By increasing the concentration of the charge transport compound to a level of from about 55 weight percent or more, including from about 55 weight percent to about 70 weight percent, and from about 55 weight percent to about 65 weight percent, a flexible imaging member can be produced with reduced residual voltage and/or improved sensitivity. Furthermore, the fatigue cracking resistance of the charge transport layer can be improved through the implementation of a heat stress release process described more particularly herein.
    Type: Application
    Filed: March 24, 2005
    Publication date: September 28, 2006
    Inventors: Anthony Horgan, Robert Yu, Satchidanand Mishra
  • Publication number: 20060166115
    Abstract: An imaging member having a charge transport layer is provided. The charge transport layer includes a plurality of charge transport layers coated from solutions of similar or different compositions or concentrations, wherein the upper or additional transport layer(s) comprise a lower concentration of charge transport compound than the first (bottom) charge transport layer. The charge transport compound included in the first (bottom) charge transport layer may either be the same or different from that included in the additional charge transport layers. The charge transport compound in one or more of the layers is dissolved or molecularly dispersed in an electrically inactive polymer material to form a solid solution. In such a construction, the resulting charge transport layer exhibits enhanced cracking suppression, improves wear resistance, provides excellent imaging member electrical performance, and delivers improved print quality.
    Type: Application
    Filed: March 27, 2006
    Publication date: July 27, 2006
    Inventors: Anthony Horgan, Robert Yu, Satchidanand Mishra, Richard Post, Edward Grabowski, Kathleen Carmichael, John Lambie
  • Publication number: 20060151922
    Abstract: Illustrated herein is a process for producing a stress relief electrostatographic imaging member web stock comprising: providing a multilayered imaging member web stock including at least one layer to be treated, the at least one layer to be treated having a coefficient of thermal expansion significantly differing from a coefficient of thermal expansion of another layer; passing the multilayered web stock over and making contact with a circular treatment tube having an outer concave arcuate circumferential surface that spontaneously creates a transverse web stock stretching force to offset the ripple causing transversal compression force in the at least one layer to be treated; heating at least one layer to be treated above the glass transition temperature (Tg) of the at least one layer to be treated to thereby create a heated portion of the at least one layer to be treated, a portion of the web stock in proximity to the heated portion of the at least one layer to be treated thereby becoming a heated portion
    Type: Application
    Filed: January 10, 2005
    Publication date: July 13, 2006
    Inventors: Robert Yu, Anthony Horgan, Satchidanand Mishra, Zoran Popovic, John Darcy, Michael Roetker, Felix Santana
  • Publication number: 20060105252
    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: Application
    Filed: November 18, 2004
    Publication date: May 18, 2006
    Inventors: Anthony Horgan, Robert Yu, Satchidanand Mishra, Richard Post, Edward Grabowski, Min-Hong Fu, Kathleen Carmichael, David Skinner
  • Publication number: 20060099525
    Abstract: An electrostatographic imaging member formulated with a liquid carbonate is provided. The imaging electrostatographic member exhibits improved service life.
    Type: Application
    Filed: November 5, 2004
    Publication date: May 11, 2006
    Inventors: Robert Yu, Satchidanand Mishra, Anthony Horgan, Richard Post, Yuhua Tong, Edward Grabowski, Kathleen Carmichael, Markus Silvestri
  • Publication number: 20060090840
    Abstract: A method of fabricating an endless flexible belt having a circumference L1 and a thin seam profile.
    Type: Application
    Filed: March 21, 2005
    Publication date: May 4, 2006
    Inventors: Satchidanand Mishra, Robert Yu, Surendar Jeyadev
  • Publication number: 20060071048
    Abstract: In ultrasonic welding of a seam, such as for creation of an imaging belt, an ultrasonic welding horn is applied to an overlap area. The welding horn has a contact surface within a certain set of dimensions comparable to the overlap area. The welding horn defines a conical main body that tapers to the dimensions of the contact area through a short length.
    Type: Application
    Filed: October 1, 2004
    Publication date: April 6, 2006
    Inventors: Robert Yu, Michael Roetker, David Martin
  • Publication number: 20060034634
    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 member 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: Application
    Filed: August 10, 2004
    Publication date: February 16, 2006
    Inventor: Robert Yu
  • Publication number: 20060002747
    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: Application
    Filed: July 2, 2004
    Publication date: January 5, 2006
    Inventors: Donald Goodman, Satish Parikh, Edward Grabowski, Matthew Torpey, M. Hinckel, Michael Roetker, Markus Silvestri, John Darcy, David Martin, Scott Griffin, Felix Santana, Robert Flanagan, Joellen Simone, Robert Yu, John Kerwawycz, Satchidanand Mishra
  • Publication number: 20050232662
    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: Application
    Filed: April 14, 2004
    Publication date: October 20, 2005
    Inventors: Satchidanand Mishra, Robert Yu, Richard Post, Anthony Horgan, Edward Grabowski, Kathleen Carmichael, Satish Parikh, Bing Hsieh, Donald VonHoene