Patents by Inventor William H. Tomison

William H. Tomison 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).

  • High-performance ink jet print head having an improved ink feed system
    Patent number: 6003971
    Abstract: An ink jet array print head (101) includes four media-width linear ink jet arrays (100). Ink flows from four sets of manifolds (106) through acoustically matched inlet filters (116), inlet ports (117), inlet channels (118), pressure chamber ports (120), and ink pressure chambers (122). Ink leaves the pressure chambers through outlet ports (124) and flows through oval outlet channels (128) to orifices (108), from which ink drops (110) are ejected. The ink pressure chambers are bounded by flexible diaphragms (130) to which piezo-ceramic transducers (132) are bonded. To minimize inter-jet cross-talk caused by pressure fluctuations in the manifolds, compliant walls (150) form one wall along the entire length of each manifold. An improved ink feed system (210) supplies four colors of ink to the print head.
    Type: Grant
    Filed: March 6, 1996
    Date of Patent: December 21, 1999
    Assignee: Tektronix, Inc.
    Inventors: David W. Hanks, Meade Neal, Sharon S. Berger, Donald B. Maclane, Nasser Alavizadeh, Ronald F. Burr, William H. Tomison
  • High-performance ink jet print head
    Patent number: 5907338
    Abstract: An ink jet array print head (101) includes four media-width linear ink jet arrays (100). Ink flows from four sets of manifolds (106) through acoustically matched inlet filters (116), inlet ports (117), inlet channels (118), pressure chamber ports (120), and ink pressure chambers (122). Ink leaves the pressure chambers through outlet ports (124) and flows through oval outlet channels (128) to orifices (108), from which ink drops (110) are ejected. The ink pressure chambers are bounded by flexible diaphragms (130) to which piezo-ceramic transducers (132) are bonded. To minimize inter-jet cross-talk caused by pressure fluctuations in the manifolds, compliant walls (150) form one wall along the entire length of each manifold. An ink feed system (200) supplies four colors of ink to the print head. Phase-change inks are melted and deposited in ink catch basins (202), funneled into ink storage reservoirs (204), and fed to the-print head through ink stack feeds (206).
    Type: Grant
    Filed: January 13, 1995
    Date of Patent: May 25, 1999
    Inventors: Ronald F. Burr, Sharon S. Berger, William H. Tomison, David A. Tence
  • Slow-wave high frequency deflection structure
    Patent number: 4207492
    Abstract: An electron beam deflection structure for a high frequency cathode-ray tube incorporates a meanderline slow wave circuit that is supported directly by the same glass rods used to support other portions of the CRT's beam forming and deflection system. To accomplish this, elongate loops that serially interconnect a plurality of deflection plate segments are bent away from the plane of the segments (and the beam axis) and joined by integral support strips to the rods. The elimination of a separate support structure for the deflectors greatly reduces manufacturing costs.
    Type: Grant
    Filed: August 7, 1978
    Date of Patent: June 10, 1980
    Assignee: Tektronix, Inc.
    Inventors: William H. Tomison, Bozidar Janko, Myron A. Bostwick, Jr., Aris Silzars