Patents by Inventor David A. Roets

David A. Roets 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 and apparatus for controlling charge on toner in a toning station
    Patent number: 5701550
    Abstract: A substantial change in charge on toner in a development station due to a reduction in relative humidity as the station warms up is compensated for by applying heat from an externaI source to the station when the station has not been warmed up. For example, when the station is turned off or in a condition of idle. This feature is particularly usable in a station having a rotating magnetic core.
    Type: Grant
    Filed: March 22, 1996
    Date of Patent: December 23, 1997
    Assignee: Eastman Kodak Company
    Inventors: Kevin D. Lofftus, Thomas K. Hilbert, David A. Roets, Jerry E. Livadas