Patents Examined by Preston Gerald E.
  • Ink viscosity regulation for ink jet printer
    Patent number: 4521789
    Abstract: An ink viscosity regulation apparatus for an ink jet printer is disclosed which controls the viscosity of ink to a value which lies within a range appropriate for printing. A signal commanding a supply of diluent into the ink is generated when a predetermined voltage level is exceeded by specific one of voltage levels for driving an electrostrictive vibrator of a head which causes a droplet to be separated from an ink stream at the shortest distance from the head.
    Type: Grant
    Filed: June 30, 1983
    Date of Patent: June 4, 1985
    Assignee: Ricoh Company, Ltd.
    Inventor: Koichiro Jinnai