Patents by Inventor Joel F. Hutchison

Joel F. Hutchison 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).

  • Alternating current energized printing system utilizing a dielectric covered resilient impression roller
    Patent number: 4099462
    Abstract: A printing system where the alternating current energized semiconductive layer of the impression roller has a covering of dielectric material with a controlled thickness, and with a dielectric constant many times greater than that of the web, such that a major portion of the applied electric potential is transmitted to the web by means of a reactive current through the covering.
    Type: Grant
    Filed: October 9, 1974
    Date of Patent: July 11, 1978
    Assignee: Hurletron Altair, Inc.
    Inventors: Daniel A. Coberley, Joel F. Hutchison