Patents by Inventor Thomas Arthur Jadwin

Thomas Arthur Jadwin 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).

  • Offset prevention during fixing
    Patent number: 4085702
    Abstract: A contact fixing device for fixing electrostatic marking particles carried on a support material is disclosed. The device includes a rotatably mounted fixing roller, a container for a supply of offset preventing material and applicator means for spraying the offset preventing material directly onto the peripheral surface of the fixing roller. Control means are provided for activating the applicator means after a predetermined period of operation of the fixing roller.
    Type: Grant
    Filed: March 29, 1976
    Date of Patent: April 25, 1978
    Assignee: Eastman Kodak Company
    Inventors: James William Consaul, Thomas Arthur Jadwin
  • Electrographic toner and developer composition containing a 4-aza-1-azoniabicyclo(2.2.2) octane salt as a charge control agent
    Patent number: 4079014
    Abstract: The present invention relates to the use of 4-aza-1-azoniabicyclo(2.2.2)octane salts as charge control agents for an electrostatic toner contained in dry electrographic developer compositions. These charge control agents preferably have the formula ##STR1## wherein R is an aliphatic organic group having from 4 to about 30 carbon atoms, and X is an anion.
    Type: Grant
    Filed: July 21, 1976
    Date of Patent: March 14, 1978
    Assignee: Eastman Kodak Company
    Inventors: Donald MacArthur Burness, Thomas Karl Dykstra, Thomas Arthur Jadwin, Hans Gway Ling