Patents by Inventor Takeshi Kamada

Takeshi Kamada 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).

  • Electrostatic printing apparatus comprising improved electrode drive means
    Patent number: 4262294
    Abstract: A sheet of copy paper (24) is moved perpendicular to a linear array (22) of printing electrodes (221, 222, 223, 224 . . . ). The electrodes (221, 222, 223, 224 . . . ) are selectively energized to form an electrostatic charge pattern on the copy sheet (24) corresponding to one horizontal scan line of an original document. The electrostatic charge pattern is developed by a toner and the resulting toner image fixed to the copy sheet (24). The electrodes (221, 222, 223, 224 . . . ) are divided into a first set (221, 223, 225 . . . ) and a second set (222, 224, 226 . . . ), the electrodes in the second set (222, 224, 226 . . . ) being alternatingly spaced from the electrodes in the first set (221, 223, 225 . . . ) along the length of the array (22). The first set (221, 223, 225 . . . ) of electrodes are selectively energized during a first time period (t1) and the second set (222, 224, 226 . . . ) of electrodes are selectively energized during a subsequent second time period (t2).
    Type: Grant
    Filed: July 31, 1978
    Date of Patent: April 14, 1981
    Assignee: Ricoh Company, Ltd.
    Inventors: Kazuyuki Hara, Mitsuru Kondo, Takeshi Kamada, Noboru Furukawa, Tamio Ohori
  • Recording head
    Patent number: 4251822
    Abstract: A recording head for use in a recording apparatus has a plurality of sets of recording electrodes corresponding to a plurality of line densities.
    Type: Grant
    Filed: April 17, 1979
    Date of Patent: February 17, 1981
    Assignee: Ricoh Company, Ltd.
    Inventors: Kazuyuki Hara, Takeshi Kamada