Patents by Inventor Raymond L. Sommers

Raymond L. Sommers 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).

  • Magenta toner and imaging processes
    Patent number: 5561013
    Abstract: An imaging process which comprises (1) charging an imaging member in an imaging apparatus; (2) creating on the member a latent image comprising areas of high, intermediate, and low potential; (3) developing the low areas of potential with a first developer comprising carrier particles and a first negatively charged toner comprised of resin, the magenta pigment 2,9-dimethyl quinacridone, a charge additive, or a mixture of charge additives, and surface additives; (4) developing the high areas of potential with a second developer comprising carrier particles and a second black toner comprised of resin, pigment, and a charge enhancing additive that enables a positively charged toner; (5) transferring the resulting developed image to a substrate; and (6) fixing the image thereto.
    Type: Grant
    Filed: September 15, 1995
    Date of Patent: October 1, 1996
    Assignee: Xerox Corporation
    Inventors: Katherine N. O'Brien, Janet L. Castano, Donald Riley, Charles D. Zimmer, Mark D. Ballou, Jane M. Kanehl, Sandra J. Hutkowski, Patricia J. Donaldson, Raymond L. Sommers
  • Imaging processes using cyan and black toners
    Patent number: 5536608
    Abstract: An imaging process which comprises (1) charging an imaging member in an imaging apparatus; (2) creating on the member a latent image comprising areas of high, intermediate, and low potential; (3) developing the low areas of potential with a first developer comprising carrier, and a first negatively charged toner comprised of resin, the cyan pigment Pigment Blue 15:3, Color Index number 74160:3, CAS Number 147-14-8, a mixture of charge enhancing additives, and surface additives; (4) developing the high areas of potential with a second developer comprising carrier and a second black toner comprised of resin, pigment, and a charge enhancing additive that enables a positively charged toner; (5) transferring the resulting developed image to a substrate; and (6) fixing the image thereto.
    Type: Grant
    Filed: September 15, 1995
    Date of Patent: July 16, 1996
    Assignee: Xerox Corporation
    Inventors: Katherine N. O'Brien, Janet L. Castano, Mark D. Ballou, Charles D. Zimmer, Jane M. Kanehl, Sandra J. Hutkowski, Patricia J. Donaldson, Becky S. Carter, Raymond L. Sommers
  • Resistive single component developer composition
    Patent number: 4569896
    Abstract: An improved single component magnetic toner composition with a resistivity of from about 10.sup.13 to about 10.sup.16 ohm/cm, at 1,000 volts, and comprised of:(a) first resin particles of a styrene methacrylate copolymer grafted with or containing a low molecular weight wax composition;(b) second resin particles of a styrene, acrylate, acrylonitrile terpolymer;(c) a major amount of magnetite particles; and(d) islands or patches of carbon black particles in an amount of from about 0.1 percent to about 1 percent by weight, contained on the surface of the resin particles.
    Type: Grant
    Filed: October 10, 1984
    Date of Patent: February 11, 1986
    Assignee: Xerox Corporation
    Inventors: Steven R. Perez, Jacques C. Bertrand, Timothy W. Jacobs, Raymond L. Sommers, George W. Vianco, Jr.