Patents Represented by Law Firm Palazzo E. O.
  • Patent number: 5288574
    Abstract: A layered photoconductive imaging member comprised of a supporting substrate, a photogenerating layer comprised of titanyl phthalocyanine photogenerating pigments and thereover a charge transport layer, and wherein said photogenerating pigments are prepared by a process which comprises the formation of a slurry comprised of dihalotitanium phthalocyanine in a mixture comprised of a trihaloacetic acid and an alkylene chloride; adding the resultant slurry to a mixture of an aliphatic alcohol and water enabling hydrolysis whereby Type X oxytitanium phthalocyanine is obtained; separating the Type X oxytitanium phthalocyanine from the slurry; and thereafter subjecting the Type X oxytitanium phthalocyanine obtained to treatment with a halobenzene, followed by the separation of Type IV oxytitanium phthalocyanine photogenerating pigments.
    Type: Grant
    Filed: September 14, 1992
    Date of Patent: February 22, 1994
    Assignee: Xerox Corporation
    Inventors: Denis Desilets, Trevor I. Martin, Cheng-Kuo Hsiao, Terry L. Bluhm
  • Patent number: 4487825
    Abstract: This invention relates to a conductive single component magnetic dry toner comprised of resins selected from polystyrene allyl alcohol copolymers, and epoxy resins, a magnetic material such as magnetite, and a conductive carbon black which is adhered and/or embedded on the surface of the copolymer or epoxy resin-magnetic material mixture. Such toner compositions, which have excellent conductivity, superior flow properties and low melt fusing temperatures, 95.degree. C.-130.degree. C., are useful for causing the development of images in commercial printers and recorders such as the Versatec printers.
    Type: Grant
    Filed: January 22, 1981
    Date of Patent: December 11, 1984
    Assignee: Xerox Corporation
    Inventors: Robert J. Gruber, John F. Knapp