Patents by Inventor John L. Hettinger

John L. Hettinger 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).

  • Prevention of excess liquid toner contamination in the formation of electrophotographic images
    Patent number: 5481342
    Abstract: Airflow is used to substantially eliminate problems cause by excess liquid toner flow in developing a latent image on a photoconductor surface. Edge effects at each end of a squeegee roller are prevented by concentrating an airstream at the nip interface of the squeegee roller with the photoconductor. Drip lines are prevented by providing a laminar airflow across the squeegee roller interface with the photoconductor to force excess toner away from the nip interface before the excess liquid can pass through the nip and cause a drip line.
    Type: Grant
    Filed: August 26, 1994
    Date of Patent: January 2, 1996
    Assignee: Hewlett-Packard Company
    Inventors: David J. Arcaro, John L. Hettinger