Patents by Inventor John Thomas McGinn

John Thomas McGinn 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).

  • Corona charging device and methods
    Patent number: 7130178
    Abstract: The invention is directed to a corona charging device having a powder feed with an outlet. The device has an internal charging cavity having an inlet and a charged powder outlet. The powder feed outlet is positioned at the internal charging cavity inlet. The device is adapted to guide a powder stream downstream from the powder feed outlet to the charged powder outlet. The device also includes a corona charger having one or more needle projections (each having a tip) positioned and adapted to facilitate a corona ion flow from the needle projections and intersecting the powder stream. The device also includes a rotating ground electrode adapted to be charged or grounded to attract the corona flow from the needle projections, and to rotate segments of the ground electrode between the internal charging cavity and a ground electrode cleaner.
    Type: Grant
    Filed: March 11, 2003
    Date of Patent: October 31, 2006
    Assignee: Sarnoff Corporation
    Inventors: Timothy Allen Pletcher, David Keller, Wen Ho, Eugene Samuel Poliniak, John Paul Furda, John Thomas McGinn, Donald Chester Pultorak, Mortaza Kashef