Patents Examined by L. Y. Falasco
  • Charged particle modulator device and imaging methods
    Patent number: 3970452
    Abstract: An ion modulator of improved sensitivity and capable of producing copies of excellent quality is provided in the form of a conductive metal screen which is coated with an insulator and overcoated with a photoconductor. This modulator configuration is characterized by having memory capabilities, being capable of being operated in both the positive and negative modes and functioning without injection contact.
    Type: Grant
    Filed: August 30, 1974
    Date of Patent: July 20, 1976
    Assignee: Addressograph Multigraph Corporation
    Inventors: Alexander Chiang-Hsia Wu, Shou Ling Hou
  • Photographic multilayer direct-positive silver halide element
    Patent number: 3963494
    Abstract: A photographic multilayer direct-positive silver halide element is provided comprising at least two direct-positive fogged silver halide emulsion layers the undermost emulsion layer comprising one or more non-spectrally sensitizing electron acceptors and the uppermost emulsion layer comprising one or more electron-acceptors at least one of which is a spectrally sensitizing electron acceptor. The direct-positive element has reduced gradation and extended exposure latitude.
    Type: Grant
    Filed: January 11, 1974
    Date of Patent: June 15, 1976
    Assignee: AGFA-GEVAERT N.V.
    Inventor: Raymond Leopold Florens
  • Photoconductors having improved sensitivity by presence of a like polar fields during imaging
    Patent number: 3958988
    Abstract: A method for developing a latent electrostatic image on a photoconductive surface which has previously been provided with an overall electrostatic charge of a predetermined polarity in which the charged surface is exposed to the image pattern of light and shadow for dissipation of the electrostatic charge in the light exposed areas while an electrode having an electrical potential of the same polarity as the electrostatic charge on the surface is positioned closely adjacent the charged surface.
    Type: Grant
    Filed: February 19, 1974
    Date of Patent: May 25, 1976
    Assignee: A. B. Dick Company
    Inventor: William E. Bixby
  • Transparency support material for electrophotographic process
    Patent number: 3958989
    Abstract: A sheet of support material in which a non-fibrous image receiving portion has a fibrous portion secured thereto. The fibrous portion cooperates with a sheet feeding apparatus to facilitate the seriatim feeding of successive sheets of support material from a stack thereof.The foregoing abstract is neither intended to define the invention disclosed in the specification, nor is it intended to be limiting as to the scope of the invention in any way.
    Type: Grant
    Filed: August 8, 1974
    Date of Patent: May 25, 1976
    Assignee: Xerox Corporation
    Inventor: William E. Kramer