Patents by Inventor Naoto TSUJINO

Naoto TSUJINO 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: 10919309
    Abstract: An ink circulator includes a first tank configured to supply ink to an inkjet head, a second tank configured to collect the ink from the inkjet head, an inter-tank path through which the ink is delivered from the second tank to the first tank, and an ink deliverer arranged in the inter-tank path and configured to deliver the ink from the second tank to the first tank through the inter-tank path. A third tank and the inter-tank path are connected via a connection path in which a switch arranged. Ink supply to the ink circulator is performed by driving the ink deliverer to deliver the ink from the third tank to the first tank with communication between the inter-tank path and the third tank allowed by the switch.
    Type: Grant
    Filed: September 16, 2019
    Date of Patent: February 16, 2021
    Assignee: RISO KAGAKU CORPORATION
    Inventor: Naoto Tsujino
  • Publication number: 20200101755
    Abstract: An ink circulator includes a first tank configured to supply ink to an inkjet head, a second tank configured to collect the ink from the inkjet head, an inter-tank path through which the ink is delivered from the second tank to the first tank, and an ink deliverer arranged in the inter-tank path and configured to deliver the ink from the second tank to the first tank through the inter-tank path. A third tank and the inter-tank path are connected via a connection path in which a switch arranged. Ink supply to the ink circulator is performed by driving the ink deliverer to deliver the ink from the third tank to the first tank with communication between the inter-tank path and the third tank allowed by the switch.
    Type: Application
    Filed: September 16, 2019
    Publication date: April 2, 2020
    Applicant: RISO KAGAKU CORPORATION
    Inventor: Naoto TSUJINO
  • Patent number: 10328704
    Abstract: An inkjet printer includes: at least one ink receptor having a tray shape with a bottom plate and an opening facing upward and being horizontally movable; and a suction unit. The at least one ink receptor is configured to receive ink ejected from at least one inkjet head as waste liquid. The suction unit includes at least one suction nozzle arranged above the bottom plate within a movable range of the at least one ink receptor and is configured to suction the ink in the at least one ink receptor through the opening with the at least one suction nozzle.
    Type: Grant
    Filed: March 7, 2018
    Date of Patent: June 25, 2019
    Assignee: RISO KAGAKU CORPORATION
    Inventors: Yasuhiro Katada, Akira Nishiyama, Shunta Nakamura, Naoto Tsujino
  • Publication number: 20180281424
    Abstract: An inkjet printer includes: at least one ink receptor having a tray shape with a bottom plate and an opening facing upward and being horizontally movable; and a suction unit. The at least one ink receptor is configured to receive ink ejected from at least one inkjet head as waste liquid. The suction unit includes at least one suction nozzle arranged above the bottom plate within a movable range of the at least one ink receptor and is configured to suction the ink in the at least one ink receptor through the opening with the at least one suction nozzle.
    Type: Application
    Filed: March 7, 2018
    Publication date: October 4, 2018
    Applicant: RISO KAGAKU CORPORATION
    Inventors: Yasuhiro KATADA, Akira NISHIYAMA, Shunta NAKAMURA, Naoto TSUJINO
  • Patent number: 9566797
    Abstract: An inkjet printer inkjet printer includes an inkjet head having a nozzle surface, a first tank for storing ink to be supplied to the inkjet head, a second tank for receiving ink that is not consumed by the inkjet head, an ink circulation path, a third tank directly or indirectly connected with a path from the second tank to the first tank on the ink circulation path, and a hermetic sealer for making the first and second tanks in a hermetically-sealed state. In a waiting mode in which ink is not circulated, the first and second tank is made in the hermetically-sealed state by the hermetic sealer and the third tank is made in an atmospherically-released state.
    Type: Grant
    Filed: April 5, 2016
    Date of Patent: February 14, 2017
    Assignee: RISO KAGAKU CORPORATION
    Inventors: Akira Nishiyama, Naoto Tsujino
  • Publication number: 20160339713
    Abstract: An inkjet printer inkjet printer includes an inkjet head having a nozzle surface, a first tank for storing ink to be supplied to the inkjet head, a second tank for receiving ink that is not consumed by the inkjet head, an ink circulation path, a third tank directly or indirectly connected with a path from the second tank to the first tank on the ink circulation path, and a hermetic sealer for making the first and second tanks in a hermetically-sealed state. In a waiting mode in which ink is not circulated, the first and second tank is made in the hermetically-sealed state by the hermetic sealer and the third tank is made in an atmospherically-released state.
    Type: Application
    Filed: April 5, 2016
    Publication date: November 24, 2016
    Inventors: Akira NISHIYAMA, Naoto TSUJINO