Patents by Inventor William Boone Pennebaker, Jr.

William Boone Pennebaker, 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).

  • Ultrasonic removal of solid impurities from recirculating ink
    Patent number: 4011157
    Abstract: In an ink jet printer solid impurities contaminating recirculating ink are removed by subjecting contaminated ink to ultrasonic energy for forming an aerosol of the ink. The aerosol of ink is entrained in an air stream and carried to impactor means where the ink aerosol is caused to return to a liquid state.
    Type: Grant
    Filed: January 30, 1976
    Date of Patent: March 8, 1977
    Assignee: International Business Machines Corporation
    Inventors: William Boone Pennebaker, Jr., Keith Samuel Pennington, Hugo Karl Seitz, Frederick Hochberg, deceased
  • High frequency alternating field charging of aerosols
    Patent number: 3997113
    Abstract: Apparatus for high frequency alternating electric field charging of aerosol particles in the form of an ink mist which may subsequently be used for ink mist printing. A charging electrode excited by a high frequency alternating voltage source is used to produce a charging field. The charging field produced by the high frequency A.C. voltage is maintained at a predetermined frequency to avoid attracting the charged particles to the charging electrode, thereby avoiding precipitation on this electrode and allowing substantially higher voltages to be applied to the charging electrode.
    Type: Grant
    Filed: December 31, 1975
    Date of Patent: December 14, 1976
    Assignee: International Business Machines Corporation
    Inventor: William Boone Pennebaker, Jr.