Patents by Inventor William C. Waterschoot

William C. Waterschoot 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).

  • Apparatus for heat-and-pressure fixation of toner images
    Patent number: 4910108
    Abstract: In a process of image production by the steps of developing an electrostatic charge pattern with toner particles comprised of coloring matter in a thermoplastic resin binder and dispersed in a carrier liquid and fixing the pattern-wise deposited toner particles while still damp with said carrier liquid on a support by simultaneously subjecting the same to heat and pressure, the toner particles have at 120.degree. C. a melt viscosity when dry of from 500 to 100,000 Pa.s, a mean average diameter of from 0.1 to 5 .mu.m, and a ratio of coloring matter to resin binder of from 1/1 to 1/9 by weight.
    Type: Grant
    Filed: January 23, 1989
    Date of Patent: March 20, 1990
    Assignee: AGFA-GEVAERT N.V.
    Inventors: Serge M. Tavernier, William C. Waterschoot, Robert T. Overmeer
  • Process for image production containing the heat-and-pressure fixing of a still wet or moist toner image
    Patent number: 4842972
    Abstract: In a process of image production by the steps of developing an electrostatic charge pattern with toner particles comprised of coloring matter in a thermoplastic resin binder and dispersed in a carrier liquid and fixing the pattern-wise deposited toner particles while still damp with said carrier liquid on a support by simultaneously subjecting the same to heat and pressure, the toner particles have at 120.degree. C. a melt viscosity when dry of from 500 to 100,000 Pa.s, a mean average diameter of from 0.1 to 5 .mu.m, and a ratio of coloring matter to resin binder of from 1/1 to 1/9 by weight.
    Type: Grant
    Filed: May 15, 1987
    Date of Patent: June 27, 1989
    Assignee: Agfa-Gevaert N.V.
    Inventors: Serge M. Tavernier, William C. Waterschoot, Robert T. Overmeer
  • Developing device for xerographic copying machines
    Patent number: 4245586
    Abstract: A xerographic developing device for depositing xerographic toner upon an image carrying medium without the use of toner carrier beads which includes an applicator roller for transferring toner from a tray towards the image carrying medium via a scraper element mounted at the exit opening of the tray. Improved regulation of the quantity of toner transferred in this manner is achieved by applying a DC-voltage potential between the applicator roller and the scraper.
    Type: Grant
    Filed: December 20, 1978
    Date of Patent: January 20, 1981
    Assignee: AGFA-GEVAERT N.V.
    Inventors: Willy J. Palmans, William C. Waterschoot