Patents by Inventor Albert T. Frenzel, Jr.

Albert T. Frenzel, 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).

  • Electrostatic image toning mechanism
    Patent number: 4775875
    Abstract: A mechanism for toning electrostatic images has two storage means for developer containing toner of different characteristics, for example, different colors. A rotational applicator rotates in one direction to transport developer from one storage, past the other storage, to a development zone and back to the storage. The applicator moves in the opposite direction to similarly transport developer from the other storage. A shield blocks the unused storage means in each mode. By transporting developer past the unused storage means on the way to the development zone, the developer can simply fall into the appropriate storage means on leaving the development zone.
    Type: Grant
    Filed: October 15, 1987
    Date of Patent: October 4, 1988
    Assignee: Eastman Kodak Company
    Inventors: Joan H. Hull, Albert T. Frenzel, Jr.