Patents by Inventor Anthony N. Spooner

Anthony N. Spooner 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 and means for testing flow properties of magnetic toners
    Patent number: 4697463
    Abstract: A method for testing electrostatic developer toners which comprises applying the toner to a stationary non-magnetic sleeve (4), moving the toner along the surface of the sleeve by an array of field lines generally normal to the surface produced by a multiple magnetic roll (1) rotating within the sleeve and determining the characteristics of the toner from the pattern (15) of the spread toner by reference to a calibrated scale (9) and a stop line (5) on the surface of the sleeve.
    Type: Grant
    Filed: August 6, 1985
    Date of Patent: October 6, 1987
    Assignee: Research Laboratories of Australia Pty. Ltd.
    Inventors: Anthony N. Spooner, Luis Lima-Marques