Patents by Inventor Ryuuta Katoh

Ryuuta Katoh 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).

  • Patent number: 10864722
    Abstract: A liquid discharge apparatus includes a liquid discharge head and a pattern printer. The liquid discharge head includes a plurality of nozzles to discharge liquid. The pattern printer drives the liquid discharge head to print a plurality of adjacent rectangular patterns under different drive conditions. The adjacent rectangular patterns are a reference pattern and an adjustment pattern.
    Type: Grant
    Filed: March 17, 2019
    Date of Patent: December 15, 2020
    Assignee: Ricoh Company, Ltd.
    Inventors: Ryuuta Katoh, Norimasa Sohgawa, Hiroki Takahashi
  • Publication number: 20190283413
    Abstract: A liquid discharge apparatus includes a liquid discharge head and a pattern printer. The liquid discharge head includes a plurality of nozzles to discharge liquid. The pattern printer drives the liquid discharge head to print a plurality of adjacent rectangular patterns under different drive conditions. The adjacent rectangular patterns are a reference pattern and an adjustment pattern.
    Type: Application
    Filed: March 17, 2019
    Publication date: September 19, 2019
    Inventors: Ryuuta KATOH, Norimasa SOHGAWA, Hiroki TAKAHASHI
  • Publication number: 20190217620
    Abstract: A liquid discharge apparatus includes a liquid discharge head, a dummy discharge controller, and a storage device. The liquid discharge head includes a plurality of nozzles to discharge liquid onto a continuous medium. The dummy discharge controller is configured to control the liquid discharge head to discharge dummy discharge droplets linearly in an inter-page area of the continuous medium. The storage device is configured to retain a plurality of dummy discharge patterns that differs from each other in number of droplets continuously discharged in at least one direction of a feed direction of the continuous medium and a direction perpendicular to the feed direction.
    Type: Application
    Filed: March 25, 2019
    Publication date: July 18, 2019
    Applicant: Ricoh Company, Ltd.
    Inventors: Ryuuta KATOH, Shino SASAKI, Yukihito NIINO
  • Patent number: 9931849
    Abstract: A liquid ejection apparatus includes: a plurality of nozzles configured to eject liquid onto a conveyed object conveyed by a conveyance unit, based on input image data; and a control unit configured to control a number of droplets in first flushing for ejecting the liquid outside a region corresponding to the image data and a number of droplets in second flushing for ejecting the liquid inside the region corresponding to the image data in addition to ejection based on the image data. The control unit is configured to control the number of droplets in the first flushing and the number of droplets in the second flushing based on at least a length of the image data in a direction in which the conveyed object is conveyed.
    Type: Grant
    Filed: January 12, 2017
    Date of Patent: April 3, 2018
    Assignee: RICOH COMPANY, LTD.
    Inventors: Ryuuta Katoh, Shino Sasaki, Yukihito Niino
  • Publication number: 20170203570
    Abstract: A liquid ejection apparatus includes: a plurality of nozzles configured to eject liquid onto a conveyed object conveyed by a conveyance unit, based on input image data; and a control unit configured to control a number of droplets in first flushing for ejecting the liquid outside a region corresponding to the image data and a number of droplets in second flushing for ejecting the liquid inside the region corresponding to the image data in addition to ejection based on the image data. The control unit is configured to control the number of droplets in the first flushing and the number of droplets in the second flushing based on at least a length of the image data in a direction in which the conveyed object is conveyed.
    Type: Application
    Filed: January 12, 2017
    Publication date: July 20, 2017
    Applicant: Ricoh Company, Ltd.
    Inventors: Ryuuta KATOH, Shino SASAKI, Yukihito NIINO
  • Publication number: 20160355012
    Abstract: A liquid discharge apparatus includes a liquid discharge head, a dummy discharge controller, and a storage device. The liquid discharge head includes a plurality of nozzles to discharge liquid, onto a continuous medium. The dummy discharge controller is configured to control the liquid discharge head to discharge dummy discharge droplets linearly in an inter-page area of the continuous medium. The storage device is configured to retain a plurality of dummy discharge patterns that differs from each other in number of droplets continuously discharged in at least one direction of a feed direction of the continuous medium and a direction perpendicular to the feed direction.
    Type: Application
    Filed: June 7, 2016
    Publication date: December 8, 2016
    Applicant: Ricoh Company, Ltd.
    Inventors: Ryuuta KATOH, Shino SASAKI, Yukihito NIINO
  • Patent number: 9290005
    Abstract: An image formation apparatus includes a first discharge unit to form an image on a recording medium; and a second discharge unit including a nozzle line that discharges transparent droplets on the image formed on the recording medium. The second discharge unit moves in a first direction relative to the recording medium and the nozzle line has nozzles in a second direction orthogonal to the first direction. After the image formation, the second discharge unit discharges the transparent droplets from the nozzles spaced at m?1 nozzle intervals to form a row of dots in the second direction, and repeats the forming while moving to form m rows in the first direction, such that the dots in the rows are formed at m?1 nozzle intervals and positions of the dots between n-th and n?1-th rows are displaced together by one nozzle in the second direction.
    Type: Grant
    Filed: September 9, 2015
    Date of Patent: March 22, 2016
    Assignee: Ricoh Company, Ltd.
    Inventors: Yoshitaka Akiyama, Ryuuta Katoh, Kazuki Yasu, Yoshinari Suzuki
  • Publication number: 20160075146
    Abstract: An image formation apparatus includes a first discharge unit to form an image on a recording medium; and a second discharge unit including a nozzle line that discharges transparent droplets on the image formed on the recording medium. The second discharge unit moves in a first direction relative to the recording medium and the nozzle line has nozzles in a second direction orthogonal to the first direction. After the image formation, the second discharge unit discharges the transparent droplets from the nozzles spaced at m?1 nozzle intervals to form a row of dots in the second direction, and repeats the forming while moving to form m rows in the first direction, such that the dots in the rows are formed at m?1 nozzle intervals and positions of the dots between n-th and n?1-th rows are displaced together by one nozzle in the second direction.
    Type: Application
    Filed: September 9, 2015
    Publication date: March 17, 2016
    Applicant: RICOH COMPANY, LTD.
    Inventors: Yoshitaka Akiyama, Ryuuta Katoh, Kazuki Yasu, Yoshinari Suzuki