Patents by Inventor Yuhua Tong

Yuhua Tong 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: 8475983
    Abstract: The presently disclosed embodiments are directed to imaging members used in electrostatography. More particularly, the embodiments pertain to electrophotographic imaging members which have an added-on protective overcoat layer formulated to comprise of a novel A-B diblock copolymer comprising two segmental blocks of a bisphenol polycarbonate and an organic acid terminal which provides chemical vapor contaminant resistive property. The overcoat layer may further be formulated to include small quantity of charge transport compound. The present embodiments provide superior copy printout quality.
    Type: Grant
    Filed: June 30, 2010
    Date of Patent: July 2, 2013
    Assignee: Xerox Corporation
    Inventors: Robert C. U. Yu, Yuhua Tong
  • Patent number: 8470446
    Abstract: A UV curable intermediate transfer media, such as a belt, that includes a first supporting substrate, such as a polyimide substrate layer, and a second surface layer of a mixture of a carbon nanotube component, a photoinitiator component, and an organic inorganic hybrid component.
    Type: Grant
    Filed: March 30, 2010
    Date of Patent: June 25, 2013
    Assignee: Xerox Corporation
    Inventors: Jin Wu, Yuhua Tong, Brian P Gilmartin, Jonathan H Herko
  • Patent number: 8470505
    Abstract: The presently disclosed embodiments are directed to imaging members used in electrostatography. More particularly, the embodiments pertain to electrophotographic imaging members which have imaging layer(s) formulated to comprise of a novel A-B diblock copolymer binder consisting of two segmental blocks of a bisphenol polycarbonate and a phthalic acid which provides chemical vapor contaminant resistive property. The present embodiments provide superior copy printout quality.
    Type: Grant
    Filed: June 10, 2010
    Date of Patent: June 25, 2013
    Assignee: Xerox Corporation
    Inventors: Robert C. U. Yu, Yuhua Tong
  • Patent number: 8465888
    Abstract: A photoconductor comprising a substrate, an undercoat layer, a photogenerating layer and a charge transport layer is described. The undercoat layer is disposed on the substrate and comprises a metal oxide, and a mixture of a phenolic resin and a cyclohexanecarboxylate.
    Type: Grant
    Filed: January 27, 2011
    Date of Patent: June 18, 2013
    Assignee: Xerox Corporation
    Inventors: Yuhua Tong, Jin Wu, Edward F. Grabowski, Marc J. Livecchi
  • Patent number: 8465893
    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: Grant
    Filed: August 18, 2010
    Date of Patent: June 18, 2013
    Assignee: Xerox Corporation
    Inventors: Edward F. Grabowski, Robert C. U. Yu, Kock-Yee Law, Yuhua Tong
  • Publication number: 20130120498
    Abstract: Disclosed is an ink jet printhead comprising a plurality of channels, wherein the channels are capable of being filled with ink from an ink supply and wherein the channels terminate in nozzles on one surface of the printhead, the surface being coated with a coating composition comprising a fluorinated poly(amide-imide) copolymer.
    Type: Application
    Filed: November 11, 2011
    Publication date: May 16, 2013
    Applicant: XEROX CORPORATION
    Inventors: Edward F. Grabowski, Yuhua Tong
  • Publication number: 20130120499
    Abstract: Disclosed is an ink jet printhead comprising a plurality of channels, wherein the channels are capable of being filled with ink from an ink supply and wherein the channels terminate in nozzles on one surface of the printhead, the surface being coated with a coating composition comprising a siloxane-etherimide copolymer and a fluorinated nonionic surfactant.
    Type: Application
    Filed: November 11, 2011
    Publication date: May 16, 2013
    Applicant: XEROX CORPORATION
    Inventors: Edward F. Grabowski, Yuhua Tong
  • Patent number: 8431292
    Abstract: The present embodiments are generally directed to an improved imaging member exhibiting various advantages over conventional imaging members. More specifically, the present embodiments are directed to an improved charge blocking layer formed from an aqueous-based coating solution which exhibits improved shelf life and coating properties, such as increased homogeneity and adhesion, and methods for making the same. The aqueous-based coating solution is environment-friendly and avoids the need to use more expensive organic solvents which involve higher safety risks in the manufacturing process.
    Type: Grant
    Filed: June 4, 2009
    Date of Patent: April 30, 2013
    Assignee: Xerox Corporation
    Inventors: Yuhua Tong, Edward F. Grabowski
  • Patent number: 8404413
    Abstract: Present embodiments are directed to the preparation of curl-free flexible imaging members used in electrostatography. More particularly, the embodiments pertain to a structurally simplified flexible electrophotographic imaging member, including the incorporation of a plasticizer or a blend of plasticizers in the imaging layer(s) to effect imaging layer(s) stress relieving outcome for curl control without the need of an anticurl back coating, and methods for making and using the imaging member.
    Type: Grant
    Filed: May 18, 2010
    Date of Patent: March 26, 2013
    Assignee: Xerox Corporation
    Inventors: Robert C. U. Yu, Yuhua Tong
  • Patent number: 8394560
    Abstract: The presently disclosed embodiments are directed to layer(s) that are useful in imaging apparatus members and components, for use in electrophotography, including digital, apparatuses. More particularly, the present embodiments provide the negatively charged electrophotographic imaging members with a novel cross-linked charge blocking undercoat layer, which is created to comprise of a binary composition of melamine and formaldehyde or a triple composition consisting of a hydroxyl functional acrylic polyol binder and a methylolation of melamine-formaldehyde, and methods for making the same. The charge blocking layer provides stabilized cyclic photo-electrical properties, enhanced mechanical adhesion bonding, and improved copy print out quality for service life extension.
    Type: Grant
    Filed: June 25, 2010
    Date of Patent: March 12, 2013
    Assignee: Xerox Corporation
    Inventors: Robert C. U. Yu, Yuhua Tong, Min-Hong Fu, Stephen T. Avery
  • Patent number: 8372568
    Abstract: The disclosed embodiments are directed to a method for removing photoreceptor coatings from a rigid substrate, wherein the photoreceptor coatings disposed over a substrate of an electrophotographic photoreceptor, in order to recover it for re-use in photoreceptor manufacturing. More specifically, the invention discloses a photoreceptor substrate recovery methodology that includes the creation of an inner release layer over the substrate and followed by subjecting the rejected or used electrophotographic photoreceptor to a step of soaking in a non-toxic and environmentally-friendly stripping solution that separates the coatings from the substrate.
    Type: Grant
    Filed: November 5, 2009
    Date of Patent: February 12, 2013
    Assignee: Xerox Corporation
    Inventors: Robert C. U. Yu, Kent J. Evans, Yuhua Tong, Nancy L. Belknap, Helen R. Cherniack, Robert P. Altavela, Edward F. Grabowski
  • Patent number: 8361685
    Abstract: The disclosed embodiments are directed to processes for removing photoreceptor coatings from a substrate, wherein the photoreceptor coatings disposed over a substrate of an electrophotographic photoreceptor. More specifically, the present embodiments discloses a photoreceptor coatings removal process comprises subjecting an electrophotographic photoreceptor to a stripping solution that separates the coatings from the substrate.
    Type: Grant
    Filed: November 5, 2009
    Date of Patent: January 29, 2013
    Assignee: Xerox Corporation
    Inventors: Robert C. U. Yu, Kent J. Evans, Yuhua Tong, Nancy L. Belknap, Helen R. Cherniack, Robert P. Altavela, Edward F. Grabowski
  • Patent number: 8349942
    Abstract: Described herein is an intermediate transfer member that includes a layer of phenoxy resin having dispersed therein graphene particles.
    Type: Grant
    Filed: May 10, 2011
    Date of Patent: January 8, 2013
    Assignee: Xerox Corporation
    Inventors: Michael S. Roetker, Francisco J. Lopez, Kyle B. Tallman, Jonathan H. Herko, David W. Martin, Scott J. Griffin, Mandakini Kanungo, Yuhua Tong
  • Patent number: 8349463
    Abstract: An intermediate transfer media, such as a belt, that includes a first optional polyimide substrate layer, and a second layer of a fluoropolyimide polymer.
    Type: Grant
    Filed: March 30, 2010
    Date of Patent: January 8, 2013
    Assignee: Xerox Corporation
    Inventors: Jin Wu, Yu Qi, Nan-Xing Hu, Yuhua Tong
  • Patent number: 8343700
    Abstract: The presently disclosed embodiments relate in general to electrostatography comprising improved features in the flexible imaging member that enhance function when used in the electrostatographic imaging system. These embodiments pertain, more particularly, to a structurally simplified curl-free flexible electrostatographic imaging member belt containing a stress/strain free ground strip layer and stress/strain free imaging layer(s) to improve dynamic belt cyclic motion quality and extend service life.
    Type: Grant
    Filed: April 16, 2010
    Date of Patent: January 1, 2013
    Assignee: Xerox Corporation
    Inventors: Robert C. U. Yu, Stephen T. Avery, Yuhua Tong, Michael S. Roetker, Jimmy E. Kelly, Kyle B. Tallman
  • Patent number: 8329367
    Abstract: A photoconductor that includes a supporting substrate, an optional ground plane layer, an optional hole blocking layer, a photogenerating layer, and at least one charge transport layer, and where the charge transport layer contains a polyamideimide.
    Type: Grant
    Filed: January 28, 2010
    Date of Patent: December 11, 2012
    Assignee: Xerox Corporation
    Inventors: Jin Wu, Yuhua Tong, Linda L Ferrarese, Edward C Savage
  • Publication number: 20120288788
    Abstract: Described herein is an intermediate transfer member that includes a layer of phenoxy resin having dispersed therein graphene particles.
    Type: Application
    Filed: May 10, 2011
    Publication date: November 15, 2012
    Applicant: XEROX CORPORATION
    Inventors: Michael S. Roetker, Francisco J. Lopez, Kyle Bruce Tallman, Jonathan H. Herko, David W. Martin, Scott J. Griffin, Mandakini Kanungo, Yuhua Tong
  • Patent number: 8293369
    Abstract: An intermediate transfer media, such as a belt, that includes a fluoropolyimide polymer.
    Type: Grant
    Filed: March 30, 2010
    Date of Patent: October 23, 2012
    Assignee: Xerox Corporation
    Inventors: Jin Wu, Yu Qi, Nan-Xing Hu, Yuhua Tong
  • Patent number: 8293444
    Abstract: A toner that includes at least one polyester resin wherein the amount of free polyvalent acid monomer in the polyester resin is less than 4 mg/gram, and wherein the percentage of the at least one polyester resin with a MW less than 1500 is less than about 10%.
    Type: Grant
    Filed: June 24, 2009
    Date of Patent: October 23, 2012
    Assignee: Xerox Corporation
    Inventors: John L. Pawlak, Timothy L. Lincoln, William H. Hollenbaugh, Jr., Yuhua Tong, Brendan H. Williamson
  • Patent number: 8280284
    Abstract: Flexible members for use in imaging devices comprise a polyamideimide comprising phosphorus.
    Type: Grant
    Filed: February 12, 2011
    Date of Patent: October 2, 2012
    Assignee: Xerox Corporation
    Inventors: Jin Wu, Yuhua Tong, Brian P. Gilmartin, Robert J. Meyer