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: 4942105
    Abstract: A flexible electrophotographic imaging member comprising at least one electrophotographic imaging layer, a supporting substrate layer having an electrically conductive surface and an anti-curl layer, the anti-curl layer comprising a film forming binder and from about 3 percent by weight to about 30 percent by weight, based on the total weight of said anti-curl backing layer, of a copolyester resin reaction product of terephthalic acid, isophthalic acid, ethylene glycol and 2,2-dimethyl-1-propane diol. This flexible electrophotographic imaging member is cycled in an electrostatographic imaging system to produce toner images.
    Type: Grant
    Filed: January 3, 1989
    Date of Patent: July 17, 1990
    Assignee: Xerox Corporation
    Inventor: Robert C. U. Yu
  • Patent number: 4937117
    Abstract: A flexible belt is fabricated from a substantially rectangular sheet having a first edge joined to a second parallel edge to form a seam, the seam having one end which terminates at a third end and another end which terminates at a fourth edge, the third edge and fourth edge being substantially perpendicular to the first and second edges, the third edge having a notch at the seam end, the notch having a bottom parallel to the third edge, the bottom extending in each direction from the centerline of the seam to the beginning of an arcuate side for a distance of between about 100 and about 400 times the thickness of the web, the notch having a depth of between about 4 and about 20 times the thickness of the web, the notch having substantially identical arcuate sides defined by a radius of curvature having a length of between about 40 and about 200 times the thickness of the web, and one end of each of the arcuate sides being substantially tangent to the bottom of the notch.
    Type: Grant
    Filed: July 24, 1989
    Date of Patent: June 26, 1990
    Assignee: Xerox Corporation
    Inventor: Robert C. U. Yu
  • Patent number: 4786570
    Abstract: A flexible electrophotographic imaging member is disclosed which comprises a flexible substrate having an electrically conductive surface, a hole blocking layer comprising an aminosilane reaction product, an adhesive layer having a thickness between about 200 angstroms and about 900 angstroms consisting essentially of at least one copolyester resin having the following formula: ##STR1## wherein the diacid is selected from the group consisting of terephthalic acid, isophthalic acid, and mixtures thereof, the diol comprises ethylene glycol, the mole ratio of diacid to diol is 1:1, n is a number between about 175 and about 350 and the T.sub.g of the copolyester resin is between about 50.degree. C. to about 80.degree. C.
    Type: Grant
    Filed: April 21, 1987
    Date of Patent: November 22, 1988
    Assignee: Xerox Corporation
    Inventors: Robert C. U. Yu, Anthony M. Horgan, Donald P. Sullivan, John A. Bergfjord
  • Patent number: 4664995
    Abstract: An electrostatographic imaging member comprising at least one imaging layer capable of retaining an electrostatic latent image, a supporting substrate layer having an electrically conductive surface, and an electrically conductive ground strip layer adjacent the electrostatographic imaging layer and in electrical contact with the electrically conductive layer, the electrically conductive ground strip layer comprising a film forming binder, conductive particles and crystalline particles dispersed in the film forming binder and a reaction product of a bi-functional chemical coupling agent with both the film forming binder and the crystalline particles. This imaging member may be employed in an electrostatographic imaging process.
    Type: Grant
    Filed: October 24, 1985
    Date of Patent: May 12, 1987
    Assignee: Xerox Corporation
    Inventors: Anthony M. Horgan, Alfred T. LaFrance, Francis J. Wieloch, Robert C. U. Yu
  • Patent number: 4654284
    Abstract: An imaging member comprising at least one flexible electrophotographic imaging layer, a flexible supporting substrate layer having an electrically conductive surface and an anti-curl layer, the anti-curl layer comprising a film forming binder, crystalline particles dispersed in the film forming binder and a reaction product of a bi-functional chemical coupling agent with both the film forming binder and the crystalline particles. This imaging member may be employed in an electrostatographic imaging process.
    Type: Grant
    Filed: October 24, 1985
    Date of Patent: March 31, 1987
    Assignee: Xerox Corporation
    Inventors: Robert C. U. Yu, Anthony M. Horgan, Francis J. Wieloch