Patents Assigned to Carl H. Hertz
  • Patent number: 4620196
    Abstract: Method and apparatus for making high resolution color prints using ink jet techniques. The method and apparatus of providing for precise control of the number of droplets of printing fluid which is deposited in a pixel on recording paper. The precise control is achieved by incremental control of the print pulse width or time duration. Further precision can be obtained by synchronizing droplet formation with for example, the leading edge of the print pulse. The number of droplets charged during the time duration of the print pulse are the number of droplets which impinge on the paper and at the pixel location. The number of droplets creates therefore a color density. Use of a plurality of nozzles and ink colors will permit the production of very high resolution and high quality color prints.
    Type: Grant
    Filed: January 31, 1985
    Date of Patent: October 28, 1986
    Assignee: Carl H. Hertz
    Inventors: Carl H. Hertz, Bo .ANG.. Samuelsson