Patents by Inventor Arthur Drummond, Jr.

Arthur Drummond, Jr. 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).

  • Magnetic brush developer roll for electrostatic reproduction machines
    Patent number: 4057666
    Abstract: A magnetic brush roller for electrostatic copier or reproduction machines of the type wherein a latent electrostatic image formed on the surface of the machine photoconductor is developed by means of a single or multiple roller magnetic brush apparatus. The outer sleeve of the magnetic brush roller is formed from a non-metallic material, i.e. plastic impregnated with small chip-like pieces of relatively hard material designed to provide the necessary surface roughness.
    Type: Grant
    Filed: October 29, 1973
    Date of Patent: November 8, 1977
    Assignee: Xerox Corporation
    Inventor: Arthur Drummond, Jr.
  • Method of forming magnetic brush support member
    Patent number: 3962003
    Abstract: A magnetic brush support member, the process of making it and a magnetic brush apparatus incorporating the support member are provided. The support member includes at least one surface for supporting a magnetic brush. The support member is formed of a composite comprising a metal binder component and a particulate second phase component. The second phase material is selected to have a greater abrasion resistance than the metal binder. A portion of the second phase protrudes from the metal binder at the support surface. The support member may be formed by casting or powder metallurgical techniques followed by removing a portion of the metal binder from the support surface to allow the second phase particles to protrude therefrom. Magnetic brush apparatuses adapted for cleaning or developing in electrostatographic machines are provided which include one or more of the magnetic brush support members.
    Type: Grant
    Filed: January 29, 1975
    Date of Patent: June 8, 1976
    Assignee: Xerox Corporation
    Inventor: Arthur Drummond, Jr.
  • Magnetic brush support member
    Patent number: 3945342
    Abstract: A magnetic brush support member, the process of making it and a magnetic brush apparatus incorporating the support member are provided. The support member includes at least one surface for supporting a magnetic brush. The support member is formed of a composite comprising a metal binder component and a particulate second phase component. The second phase material is selected to have a greater abrasion resistance than the metal binder. A portion of the second phase protrudes from the metal binder at the support surface. The support member may be formed by casting or powder metallurgical techniques followed by removing a portion of the metal binder from the support surface to allow the second phase particles to protrude therefrom. Magnetic brush apparatuses adapted for cleaning or developing in electrostatographic machines are provided which include one or more of the magnetic brush support members.
    Type: Grant
    Filed: January 29, 1975
    Date of Patent: March 23, 1976
    Assignee: Xerox Corporation
    Inventor: Arthur Drummond, Jr.