Patents by Inventor John Carl Tamulis

John Carl Tamulis 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 the velocity of ink drops in an ink jet printer
    Patent number: 4063252
    Abstract: In an ink jet printer, drops are generated at a test frequency which is a harmonic of the drop generation rate for printing. If an error in velocity is detected at the test frequency, a coarse correction velocity is made to bring the correct number of drops within the range of one-half the wavelength at the nth drop location relative to a drop detector. Drops are then generated at the printing frequency and a fine correction in the velocity is made if a velocity error is detected.
    Type: Grant
    Filed: November 11, 1976
    Date of Patent: December 13, 1977
    Assignee: International Business Machines Corporation
    Inventors: Donald Frederick Jensen, John Carl Tamulis, Thomas Tomasky, Jack Louis Zable
  • Multi-nozzle ink jet printer and method of printing
    Patent number: 4025925
    Abstract: A line printer has a print head with plural nozzles arranged in a single row generally transverse to the direction of relative motion of the print head and a print medium. The nozzles are spaced plural dot positions from each other corresponding to a plural dot segment of a single dot matrix character stroke. When the row of nozzles is slanted relative to the direction of motion, drops from the nozzles are used to print stroke segments in plural character strokes simultaneously.
    Type: Grant
    Filed: January 2, 1976
    Date of Patent: May 24, 1977
    Assignee: International Business Machines Corporation
    Inventors: Donald Frederick Jensen, Ho Chong Lee, John Carl Tamulis