Patents by Inventor Hidehito Fukuyasu

Hidehito Fukuyasu 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).

  • Ink jet printing device and image forming apparatus
    Patent number: 7396106
    Abstract: An ink jet printing device comprises a head unit, a head-unit moving unit, a recording-medium moving unit, and a control unit controlling the head unit, the head-unit moving unit, and the recording-medium moving unit. The control unit is configured to carry out printing so that a rear-end portion of discharge nozzles in an array direction after printing of a printing region and a front-end portion of the discharge nozzles in the array direction before printing of a non-printed region overlap each other with respect to a sub-scanning direction, and invalid nozzles that do not discharge ink drops are determined from among arbitrary ones of overlapping discharge nozzles including a front-end portion and a rear-end portion in the array direction of the discharge nozzles.
    Type: Grant
    Filed: November 12, 2004
    Date of Patent: July 8, 2008
    Assignee: Ricoh Company, Ltd.
    Inventor: Hidehito Fukuyasu
  • Ink jet printing device and image forming apparatus
    Publication number: 20060146080
    Abstract: An ink jet printing device comprises a head unit, a head-unit moving unit, a recording-medium moving unit, and a control unit controlling the head unit, the head-unit moving unit, and the recording-medium moving unit. The control unit is configured to carry out printing so that a rear-end portion of discharge nozzles in an array direction after printing of a printing region and a front-end portion of the discharge nozzles in the array direction before printing of a non-printed region overlap each other with respect to a sub-scanning direction, and invalid nozzles that do not discharge ink drops are determined from among arbitrary ones of overlapping discharge nozzles including a front-end portion and a rear-end portion in the array direction of the discharge nozzles.
    Type: Application
    Filed: November 12, 2004
    Publication date: July 6, 2006
    Inventor: Hidehito Fukuyasu