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).

  • GELATIN RELEASE LAYER AND METHODS FOR USING THE SAME
    Publication number: 20110104602
    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: Application
    Filed: November 5, 2009
    Publication date: May 5, 2011
    Applicant: XEROX CORPORATION
    Inventors: Robert C. U. Yu, Kent J. Evans, Yuhua Tong, Nancy L. Belknap, Helen R. Cherniack, Robert P. Altavela, Edward F. Grabowski
  • FLEXIBLE IMAGING MEMBER BELTS
    Publication number: 20110053069
    Abstract: Embodiments pertain to a flexible imaging member used in electrostatography and processes for making and using the imaging member. More particularly, the embodiments pertain to a structurally simplified flexible electrophotographic imaging member that has reasonable flatness and exhibits good performance without the need of an anticurl back coating layer.
    Type: Application
    Filed: August 31, 2009
    Publication date: March 3, 2011
    Applicant: XEROX CORPORATION
    Inventors: Robert C. U. Yu, Yuhua Tong, Stephen T. Avery, Michael S. Roetker, Jimmy E. Kelly
  • FLEXIBLE IMAGING MEMBER BELTS
    Publication number: 20110053068
    Abstract: Embodiments pertain to a flexible imaging member used in electrostatography and processes for making and using the imaging member. More particularly, the embodiments pertain to a structurally simplified flexible electrophotographic imaging member that has reasonable flatness and exhibits good performance without the need of an anticurl back coating layer.
    Type: Application
    Filed: August 31, 2009
    Publication date: March 3, 2011
    Applicant: XEROX CORPORATION
    Inventors: Robert C. U. Yu, Yuhua Tong, Stephen T. Avery, Michael S. Roetker
  • CRACK RESISTANT IMAGING MEMBER PREPARATION AND PROCESSING METHOD
    Publication number: 20100304285
    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 the development of a structurally simplified flexible electrophotographic imaging member without the need of an anticurl back coating layer and a post treatment process for effecting the imaging member service life extension in the field.
    Type: Application
    Filed: June 1, 2009
    Publication date: December 2, 2010
    Applicant: XEROX CORPORATION
    Inventors: Robert C. U. Yu, Stephen T. Avery, Michael S. Roetker
  • FLEXIBLE IMAGING MEMBERS HAVING A PLASTICIZED IMAGING LAYER
    Publication number: 20100297544
    Abstract: The presently disclosed embodiments relate in general to 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 into the charge transport layer such that an anticurl back coating is no longer needed for reduction or elimination of the layered photoreceptor curling.
    Type: Application
    Filed: May 22, 2009
    Publication date: November 25, 2010
    Applicant: XEROX CORPORATION
    Inventors: Robert C. U. Yu, Yuhua Tong
  • Imaging member
    Patent number: 7829252
    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: Grant
    Filed: September 7, 2005
    Date of Patent: November 9, 2010
    Assignee: Xerox Corporation
    Inventor: Robert C. U. Yu
  • Mechanical and electrical robust imaging member and a process for producing same
    Patent number: 7829251
    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: Grant
    Filed: March 24, 2005
    Date of Patent: November 9, 2010
    Assignee: Xerox Corporation
    Inventors: Anthony M. Horgan, Robert C. U. Yu, Satchidanand Mishra
  • FLEXIBLE IMAGING MEMBERS WITHOUT ANTICURL LAYER
    Publication number: 20100279218
    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 the incorporation of a liquid compound having a high boiling point into the charge transport layer such that an anticurl back coating is no longer needed for reduction or elimination of photoreceptor layer curling.
    Type: Application
    Filed: May 1, 2009
    Publication date: November 4, 2010
    Applicant: XEROX CORPORATION
    Inventors: Robert C. U. Yu, Stephen T. Avery, Yuhua Tong
  • FLEXIBLE IMAGING MEMBERS WITHOUT ANTICURL LAYER
    Publication number: 20100279219
    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 the incorporation of a liquid compound having a high boiling point into the charge transport layer such that an anticurl back coating is no longer needed for reduction or elimination of photoreceptor layer curling.
    Type: Application
    Filed: May 1, 2009
    Publication date: November 4, 2010
    Applicant: XEROX CORPORATION
    Inventors: Robert C. U. Yu, Stephen T. Avery, Edward F. Grabowski, Terry L. Street, Jimmy E. Kelly, Joellen Simone
  • STRUCTURALLY SIMPLIFIED FLEXIBLE IMAGING MEMBERS
    Publication number: 20100279217
    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 the incorporation of a liquid compound having a high boiling point into the charge transport layer such that an anticurl back coating is no longer needed for reduction or elimination of photoreceptor upward curling.
    Type: Application
    Filed: May 1, 2009
    Publication date: November 4, 2010
    Applicant: XEROX CORPORATION
    Inventors: Robert C. U. Yu, Stephen T. Avery, Yuhua Tong, Michael Roetker, Edward F. Grabowski, Jimmy E. Kelly
  • COATING FOR OPTICALLY SUITABLE AND CONDUCTIVE ANTI-CURL BACK COATING LAYER
    Publication number: 20100273100
    Abstract: The presently disclosed embodiments relate generally to layers that are useful in imaging apparatus members and components, for use in electrostatographic, including digital, apparatuses. More particularly, the embodiments pertain to an improved electrostatographic imaging member incorporating a thermoplastic material pre-compounded to impart conductivity to the anti-curl back coating layer and may also contain an adhesion promoter which provides a conductively and optically anti-curl back coating layer. The conductive anti-curl back coating of the present disclosure may be formulated to have a single layer, dual layers, or triple layers.
    Type: Application
    Filed: April 24, 2009
    Publication date: October 28, 2010
    Applicant: XEROX CORPORATION
    Inventors: Robert C. U. Yu, Yuhua Tong, Edward F. Grabowski, Kock-Yee Law
  • COATING DISPERSION FOR OPTICALLY SUITABLE AND CONDUCTIVE ANTI-CURL BACK COATING LAYER
    Publication number: 20100239966
    Abstract: The presently disclosed embodiments relate generally to layers that are useful in imaging apparatus members and components, for use in electrostatographic, including digital, apparatuses. More particularly, the embodiments pertain to an improved electrostatographic imaging member incorporating a carbon nano tube dispersion into a high molecular weight polycarbonate and an anti-static copolymer with polyester, polycarbonate, and polyethylene glycol units in a formulation for the anti-curl back coating layer which provides a conductively suitable and stable dispersion coating solution for making an optically suitable anti-curl back coating layer.
    Type: Application
    Filed: March 18, 2009
    Publication date: September 23, 2010
    Applicant: XEROX CORPORATION
    Inventors: Yuhua Tong, Edward F. Grabowski, Donald J. Goodman, Kock-Yee Law, Robert C.U. Yu
  • Apparatus for conditioning a substrate
    Patent number: 7734244
    Abstract: An image development method implemented on a substrate conditioning unit for the drying and compression of a print substrate in an electrophotographic imaging process. The conditioning unit includes a heating mechanism for maintaining the heat of compression rollers, belts or nip rollers for compressing the substrate by a determined distance between the conditioning rollers, or by direct contact between a compression roller and a nip roller, and having an abhesive layer to prevent adhesion of the conditioning unit to the print substrate.
    Type: Grant
    Filed: February 23, 2007
    Date of Patent: June 8, 2010
    Assignee: Xerox Corporation
    Inventors: Robert C. U. Yu, Jimmy E. Kelly, Stephen T. Avery
  • Apparatus for producing an imaging member belt having an angular seam
    Patent number: 7685913
    Abstract: There is provided an apparatus for producing a cross-sectional angular surface along a substrate, such as a flexible electrostatographic imaging member belt. The 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 straight blade edge. The cutting blade may be positioned at an angle relative to a plane of an associated substrate to be cut.
    Type: Grant
    Filed: July 29, 2005
    Date of Patent: March 30, 2010
    Assignee: Xerox Corporation
    Inventors: Michael Stephen Roetker, Donald Laflair, David Martin, Felix J. Santana, John Joseph Darcy, III, Scott Griffin, Robert C. U. Yu
  • Photoconductors
    Patent number: 7670736
    Abstract: A photoconductor containing a first layer, a supporting substrate thereover, a photogenerating layer, and at least one charge transport layer comprised of at least one charge transport component, and wherein the first layer is in contact with the supporting substrate on the reverse side thereof, and which layer contains a semi-penetrating polymer network formed from crosslinking a suitable fluoropolymer, and within which network structure is penetrated with a polycarbonate.
    Type: Grant
    Filed: March 29, 2007
    Date of Patent: March 2, 2010
    Assignee: Xerox Corporation
    Inventors: Huoy-Jen Yuh, Robert C U Yu, Yuhua Tong, David M. Skinner
  • Imaging member
    Patent number: 7642029
    Abstract: A flexible imaging member which does not require the use of an anti-curl back coating is disclosed herein. The flexible imaging member has a layer comprising two charge transport molecules dispersed in a film-forming polymer binder and an overcoat layer. The first charge transport molecule is a biphenyl amine, terphenyl diamine, or bis(triarylamine) stilbene. The second charge transport molecule is a bis(triarylamine), tri-p-tolylamine, or triphenylamine. The weight ratio of second charge transport molecule to first charge transport molecule is from about 90:10 to about 66:34. Trifluoro acetic acid is also added to the layer containing the charge transport material.
    Type: Grant
    Filed: October 28, 2005
    Date of Patent: January 5, 2010
    Assignee: Xerox Corporation
    Inventors: Anthony M. Horgan, Robert C. U. Yu, Kathleen M. Carmichael
  • Imaging member
    Patent number: 7611811
    Abstract: An imaging member having an adhesive charge transport layer is disclosed herein. The charge transport layer comprises a low surface energy polymer having siloxane segments in its backbone and a charge transport compound; it may further comprise a film-forming polymer. The charge transport layer has low surface energy, reduced coefficient of surface contact friction, and improved surface lubricity.
    Type: Grant
    Filed: December 22, 2005
    Date of Patent: November 3, 2009
    Assignee: Xerox Corporation
    Inventors: Robert C. U. Yu, Stephen T. Avery, Kathleen M. Carmichael, Jimmy E. Kelly
  • LOW FRICTION ELECTROSTATOGRAPHIC IMAGING MEMBER
    Publication number: 20090253063
    Abstract: Present embodiments pertain to an improved electrostatographic imaging member having low contact friction surfaces to ease sliding mechanical interaction and suppressing abrasion/wear failure and methods of preparing thereof. The improved imaging member has layers comprising one or two low surface energy polymeric materials that enhance the physical and mechanical functions and reduce the layers surface contact friction of the imaging member to extend service life.
    Type: Application
    Filed: April 7, 2008
    Publication date: October 8, 2009
    Applicant: XEROX CORPORATION
    Inventors: Robert C. U. Yu, Stephen T. Avery, Kent J. Evans
  • LOW FRICTION ELECTROSTATOGRAPHIC IMAGING MEMBER
    Publication number: 20090253062
    Abstract: Present embodiments pertain to an improved electrostatographic imaging member having low contact friction surfaces to ease sliding mechanical interaction and suppressing abrasion/wear failure and methods of preparing thereof. The improved imaging member has layers comprising one or two low surface energy polymeric materials that enhance the physical and mechanical functions and reduce the layers surface contact friction of the imaging member to extend service life.
    Type: Application
    Filed: April 7, 2008
    Publication date: October 8, 2009
    Applicant: XEROX CORPORATION
    Inventor: Robert C. U. Yu
  • LOW FRICTION ELECTROSTATOGRAPHIC IMAGING MEMBER
    Publication number: 20090253058
    Abstract: Present embodiments pertain to an improved electrostatographic imaging member having low contact friction surfaces to ease sliding mechanical interaction and suppressing abrasion/wear failure and methods of preparing thereof. The improved imaging member has layers comprising one or two low surface energy polymeric materials that enhance the physical and mechanical functions and reduce the layers surface contact friction of the imaging member to extend service life.
    Type: Application
    Filed: April 7, 2008
    Publication date: October 8, 2009
    Applicant: XEROX CORPORATION
    Inventors: Robert C. U. Yu, Stephen T. Avery, Kathleen M. Carmichael