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).

  • Patent number: 9482969
    Abstract: An electrophotographic imaging member which has improved imaging layer(s) formulated to comprise a charge transport compound and a polymer blended binder to render photoelectrical stability, tune-ability, and surface contact friction reduction for providing service life extension. The polymer blended binder used in the imaging layer(s) is a binary polymer blend binder consisting of: (1) an A-B diblock copolymer and a bisphenol polycarbonate and a low surface energy polysiloxane/polycarbonate random copolymer and (2) an A-B diblock copolymer and a low surface energy graft polysiloxane/polycarbonate copolymer.
    Type: Grant
    Filed: March 4, 2015
    Date of Patent: November 1, 2016
    Assignee: XEROX CORPORATION
    Inventors: Robert C. U. Yu, Stephen T. Avery, Jimmy E. Kelly
  • Patent number: 9201318
    Abstract: The disclosure provides a flexible electrophotographic imaging member comprising a single novel polymer binder in the formulation of the imaging layers. In particular, the present embodiments provide multi-layered electrophotographic imaging members prepared by using the same polymer binder in the two contiguous imaging formation layers to improve mechanical and photoelectrical performance. The embodiments also include a process for making and using the imaging member.
    Type: Grant
    Filed: July 17, 2013
    Date of Patent: December 1, 2015
    Assignee: XEROX CORPORATION
    Inventors: Robert C. U. Yu, Stephen T. Avery, Jimmy E. Kelly, Mark Muscato, J. Robinson Cowdery-Corvan, Dennis J. Prosser
  • Patent number: 9158215
    Abstract: An image forming apparatus comprising a seamless intermediate transfer belt, and methods for making the same. The seamless intermediate transfer belt comprises a carbon black dispersion and a mechanically robust polymer material having very high molecular weight.
    Type: Grant
    Filed: February 10, 2014
    Date of Patent: October 13, 2015
    Assignee: XEROX CORPORATION
    Inventor: Robert C. U. Yu
  • Patent number: 9149832
    Abstract: A cleaning device used in an electrophotographic image forming apparatus that provides excellent wear resistance and mechanical robustness. In particular, the cleaning device is a crosslinked elastomeric polyurethane cleaning blade that includes at least an end region contacting the surface of an imaging member to remove debris therefrom and comprising spherical silica nanoparticles dispersion present in the cleaning blade matrix by in-situ condensation precipitation process.
    Type: Grant
    Filed: November 1, 2013
    Date of Patent: October 6, 2015
    Assignee: XEROX CORPORATION
    Inventor: Robert C. U. Yu
  • Publication number: 20150227065
    Abstract: An image forming apparatus comprising a seamless intermediate transfer belt, and methods for making the same. The seamless intermediate transfer belt comprises a carbon black dispersion and a mechanically robust polymer material having very high molecular weight.
    Type: Application
    Filed: February 10, 2014
    Publication date: August 13, 2015
    Applicant: XEROX CORPORATION
    Inventor: Robert C.U. Yu
  • Patent number: 9091949
    Abstract: An electrophotographic imaging member which has improved imaging layer(s) formulated to comprise a charge transport compound and a polymer blended binder to render photoelectrical stability, tune-ability, and surface contact friction reduction for providing service life extension. The polymer blended binder used in the imaging layer(s) is a binary polymer blend consisting of: (1) an A-B diblock copolymer and a bisphenol polycarbonate and (2) an A-B diblock copolymer and a bisphenol polycarbonate plus a slippery nano POSS particle dispersion in its material matrix.
    Type: Grant
    Filed: August 16, 2013
    Date of Patent: July 28, 2015
    Assignee: XEROX CORPORATION
    Inventors: Robert C. U. Yu, Stephen T. Avery, Jimmy E. Kelly, Mark Muscato
  • Patent number: 9075327
    Abstract: Flexible imaging members in electrophotography which have an improved plasticized charge transport layer formulation. The resulting imaging member is resistant to chemical contaminants, photoelectrically stable, fatigue cracking suppression, and has a simplified material structure which is curl-free without the need of an anticurl back coating layer. Process for making and using the member are also disclosed.
    Type: Grant
    Filed: September 20, 2013
    Date of Patent: July 7, 2015
    Assignee: XEROX CORPORATION
    Inventor: Robert C. U. Yu
  • Publication number: 20150177629
    Abstract: An electrophotographic imaging member which has improved imaging layer(s) formulated to comprise a charge transport compound and a polymer blended binder to render photoelectrical stability, tune-ability, and surface contact friction reduction for providing service life extension. The polymer blended binder used in the imaging layer(s) is a binary polymer blend binder consisting of: (1) an A-B diblock copolymer and a bisphenol polycarbonate and a low surface energy polysiloxane/polycarbonate random copolymer and (2) an A-B diblock copolymer and a low surface energy graft polysiloxane/polycarbonate copolymer.
    Type: Application
    Filed: March 4, 2015
    Publication date: June 25, 2015
    Inventors: Robert C.U. Yu, Stephen T. Avery, Jimmy E. Kelly
  • Patent number: 9063447
    Abstract: The disclosure provides a flexible electrophotographic imaging member having an optically clear, cross-linked anticurl back coating of melamine formaldehyde to effect complete and absolute imaging member flatness.
    Type: Grant
    Filed: July 11, 2013
    Date of Patent: June 23, 2015
    Assignee: XEROX CORPORATION
    Inventor: Robert C. U. Yu
  • Patent number: 9046798
    Abstract: An electrophotographic imaging member which has improved imaging layer(s) formulated to comprise a charge transport compound and a polymer blended binder to render photoelectrical stability, tune-ability, and surface contact friction reduction for providing service life extension. The polymer blended binder used in the imaging layer(s) is a binary polymer blend binder consisting of: (1) an A-B diblock copolymer and a bisphenol polycarbonate and a low surface energy polysiloxane/polycarbonate random copolymer and (2) an A-B diblock copolymer and a low surface energy graft polysiloxane/polycarbonate copolymer.
    Type: Grant
    Filed: August 16, 2013
    Date of Patent: June 2, 2015
    Assignee: XEROX CORPORATION
    Inventors: Robert C. U. Yu, Stephen T. Avery, Jimmy E. Kelly
  • Publication number: 20150125177
    Abstract: A cleaning device used in an electrophotographic image forming apparatus that provides excellent wear resistance and mechanical robustness. In particular, the cleaning device is a crosslinked elastomeric polyurethane cleaning blade that includes at least an end region contacting the surface of an imaging member to remove debris therefrom and comprising spherical silica nanoparticles dispersion present in the cleaning blade matrix by in-situ condensation precipitation process.
    Type: Application
    Filed: November 1, 2013
    Publication date: May 7, 2015
    Applicant: XEROX CORPORATION
    Inventor: ROBERT C.U. YU
  • Patent number: 9017907
    Abstract: The presently disclosed embodiments relate in general to flexible electrophotographic imaging members, such as layered photoreceptor structural simplification, and material reformulation for making and using the same. More particularly, the embodiments pertain to the incorporation of a plasticizer or mixture of plasticizers into the charge transport layer for rendering flatness such that an anticurl back coating is no longer needed to counteract and control the layered photoreceptor curling.
    Type: Grant
    Filed: July 11, 2013
    Date of Patent: April 28, 2015
    Assignee: Xerox Corporation
    Inventor: Robert C. U. Yu
  • Patent number: 9017906
    Abstract: The disclosure provides a flexible electrophotographic imaging member having an optically clear, cross-linked anticurl back coating of melamine formaldehyde to effect complete and absolute imaging member flatness. In particular embodiments, the anticurl back coating further includes an organic or inorganic particle dispersion.
    Type: Grant
    Filed: July 11, 2013
    Date of Patent: April 28, 2015
    Assignee: Xerox Corporation
    Inventors: Robert C. U. Yu, Mark Muscato, J. Robinson Cowdery-Corvan
  • Patent number: 9017908
    Abstract: The presently disclosed embodiments are directed to flexible imaging members used in electrophotographic imaging apparatuses. More particularly, the embodiments pertain to electrophotographic imaging members which have imaging layer(s) formulated to comprise of a novel polymer blended binder comprising a bisphenol type polycarbonate and an organic acid-containing copolyester doped into the polycarbonate which provides improved properties and performance to the resulting imaging member. The formulated imaging layer(s) may further include a plasticizer.
    Type: Grant
    Filed: August 20, 2013
    Date of Patent: April 28, 2015
    Assignee: Xerox Corporation
    Inventors: Robert C. U. Yu, Stephen T. Avery, Jimmy E. Kelly, Mark Muscato, J. Robinson Cowdery-Corvan, David Skinner, Dennis J. Prosser
  • Publication number: 20150086914
    Abstract: Flexible imaging members in electrophotography which have an improved plasticized charge transport layer formulation. The resulting imaging member is resistant to chemical contaminants, photoelectrically stable, fatigue cracking suppression, and has a simplified material structure which is curl-free without the need of an anticurl back coating layer. Process for making and using the member are also disclosed.
    Type: Application
    Filed: September 20, 2013
    Publication date: March 26, 2015
    Applicant: XEROX CORPORATION
    Inventor: ROBERT C.U. YU
  • Publication number: 20150056546
    Abstract: The presently disclosed embodiments are directed to flexible imaging members used in electrophotographic imaging apparatuses. More particularly, the embodiments pertain to electrophotographic imaging members which have imaging layer(s) formulated to comprise of a novel polymer blended binder comprising a bisphenol type polycarbonate and an organic acid-containing copolyester doped into the polycarbonate which provides improved properties and performance to the resulting imaging member. The formulated imaging layer(s) may further include a plasticizer.
    Type: Application
    Filed: August 20, 2013
    Publication date: February 26, 2015
    Applicant: XEROX CORPORATION
    Inventors: ROBERT C.U. YU, Stephen T. Avery, Jimmy E. Kelly, Mark Muscato, J. Robinson Cowdery-Corvan, David Skinner, Dennis J. Prosser
  • Publication number: 20150050587
    Abstract: An electrophotographic imaging member which has improved imaging layer(s) formulated to comprise a charge transport compound and a polymer blended binder to render photoelectrical stability, tune-ability, and surface contact friction reduction for providing service life extension. The polymer blended binder used in the imaging layer(s) is a binary polymer blend consisting of: (1) an A-B diblock copolymer and a bisphenol polycarbonate and (2) an A-B diblock copolymer and a bisphenol polycarbonate plus a slippery nano POSS particle dispersion in its material matrix.
    Type: Application
    Filed: August 16, 2013
    Publication date: February 19, 2015
    Applicant: XEROX CORPORATION
    Inventors: ROBERT C.U. YU, Stephen T. Avery, Jimmy E. Kelly, Mark Muscato
  • Publication number: 20150050588
    Abstract: An electrophotographic imaging member which has improved imaging layer(s) formulated to comprise a charge transport compound and a polymer blended binder to render photoelectrical stability, tune-ability, and surface contact friction reduction for providing service life extension. The polymer blended binder used in the imaging layer(s) is a binary polymer blend binder consisting of: (1) an A-B diblock copolymer and a bisphenol polycarbonate and a low surface energy polysiloxane/polycarbonate random copolymer and (2) an A-B diblock copolymer and a low surface energy graft polysiloxane/polycarbonate copolymer.
    Type: Application
    Filed: August 16, 2013
    Publication date: February 19, 2015
    Applicant: XEROX CORPORATION
    Inventors: ROBERT C.U. YU, STEPHEN T. AVERY, JIMMY E. KELLY
  • Publication number: 20150024310
    Abstract: The disclosure provides a flexible electrophotographic imaging member comprising a single novel polymer binder in the formulation of the imaging layers. In particular, the present embodiments provide multi-layered electrophotographic imaging members prepared by using the same polymer binder in the two contiguous imaging formation layers to improve mechanical and photoelectrical performance. The embodiments also include a process for making and using the imaging member.
    Type: Application
    Filed: July 17, 2013
    Publication date: January 22, 2015
    Inventors: ROBERT C.U. YU, Stephen T. Avery, Jimmy E. Kelly, Mark Muscato, J. Robinson Cowdery-Corvan, Dennis J. Prosser
  • Publication number: 20150017579
    Abstract: The disclosure provides a flexible electrophotographic imaging member having an optically clear, cross-linked anticurl back coating of melamine formaldehyde to effect complete and absolute imaging member flatness.
    Type: Application
    Filed: July 11, 2013
    Publication date: January 15, 2015
    Inventor: Robert C.U. Yu