Patents by Inventor Ernest A. H. Weiler

Ernest A. H. Weiler 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).

  • Method of manufacture of a xerographic microfield donor
    Patent number: 4114261
    Abstract: Microfield donors used in a xerographic process and the methods for manufacturing them. The donor is provided with means for establishing a plurality of electrostatic microfields on the donor surface to attract and hold toner particles so they can be transported to a developing station. The polarity of the established microfields are continuously reversed to alternately repel and attract toner particles to the donor surface during their transportation in order to agitate the toner particles to prevent agglomeration of the particles from forming and to effect nullification of the microfield attracting the particles adjacent a photoconductor to form a high density image free of background deposits in uncharged area of the photoconductive surface.
    Type: Grant
    Filed: May 24, 1976
    Date of Patent: September 19, 1978
    Assignee: Xerox Corporation
    Inventor: Ernest A. H. Weiler
  • Toner agitation through microfield donor
    Patent number: 4017648
    Abstract: Microfield donors used in a xerographic process and the methods for manufacturing them. The donor is provided with means for establishing a plurality of electrostatic microfields on the donor surface to attract and hold toner particles so they can be transported to a developing station. The polarity of the established microfields are continuously reversed to alternately repel and attract toner particles to the donor surface during their transportation in order to agitate the toner particles to prevent agglomeration of the particles from forming and to effect nullification of the microfield attracting the particles adjacent a photoconductor to form a high density image free of background deposits in uncharged area of the photoconductive surface.
    Type: Grant
    Filed: May 24, 1976
    Date of Patent: April 12, 1977
    Assignee: Xerox Corporation
    Inventor: Ernest A. H. Weiler
  • Self-spacing microfield donors
    Patent number: 3999515
    Abstract: Microfield donors used in a xerographic process in which the donor is spaced from the photoconductive surface by a spacer element along their interracting surfaces to preclude background deposits of toner from forming in the development of an electrostatic latent image on the photoconductive surface.
    Type: Grant
    Filed: February 3, 1975
    Date of Patent: December 28, 1976
    Assignee: Xerox Corporation
    Inventor: Ernest A. H. Weiler
  • Microfield donors with toner agitation and the methods for their manufacture
    Patent number: 3998185
    Abstract: Microfield donors used in a xerographic process and the methods for manufacturing them. The donor is provided with means for establishing a plurality of electrostatic microfields on the donor surface to attract and hold toner particles so they can be transported to a developing station. The polarity of the established microfields are continuously reversed to alternately repel and attract toner particles to the doner surface during their transportation in order to agitate the toner particles to prevent agglomeration of the particles from forming and to effect nullification of the microfield attracting the particles adjacent a photoconductor to form a high density image free of background deposits in uncharged area of the photoconductive surface.
    Type: Grant
    Filed: February 3, 1975
    Date of Patent: December 21, 1976
    Assignee: Xerox Corporation
    Inventor: Ernest A. H. Weiler