Patents by Inventor Yoshinori ASAKA

Yoshinori ASAKA 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).

  • Inkjet head and inkjet recording apparatus
    Patent number: 10245841
    Abstract: Provided are an inkjet head and an inkjet recording apparatus which are compact and are capable of realizing high resolution, and are capable of stably ejecting liquid droplets at a high frequency while having a structure capable of circulating ink. The inkjet head includes: a plurality of nozzles which eject ink; a plurality of pressure chambers which are respectively communicate with the plurality of nozzles and are filled with ink; a plurality of pressure generation portions which apply a pressure to ink inside the plurality of pressure chamber; a circulation flow passage that is provided to be branched from an ink flow passage ranging from an inlet of the pressure chambers and an outlet of the nozzles, and is capable of discharging ink inside the plurality of pressure chambers; and a first damper and a second damper which are provided to face the circulation flow passage, and is capable of changing a volume of the circulation flow passage through elastic deformation in correspondence with a pressure.
    Type: Grant
    Filed: September 12, 2016
    Date of Patent: April 2, 2019
    Assignee: KONICA MINOLTA, INC.
    Inventors: Yoshinori Asaka, Takashi Matsuo
  • INKJET HEAD AND INKJET RECORDING APPARATUS
    Publication number: 20180257386
    Abstract: Provided are an inkjet head and an inkjet recording apparatus which are compact and are capable of realizing high resolution, and are capable of stably ejecting liquid droplets at a high frequency while having a structure capable of circulating ink. The inkjet head includes: a plurality of nozzles which eject ink; a plurality of pressure chambers which are respectively communicate with the plurality of nozzles and are filled with ink; a plurality of pressure generation portions which apply a pressure to ink inside the plurality of pressure chamber; a circulation flow passage that is provided to be branched from an ink flow passage ranging from an inlet of the pressure chambers and an outlet of the nozzles, and is capable of discharging ink inside the plurality of pressure chambers; and a first damper and a second damper which are provided to face the circulation flow passage, and is capable of changing a volume of the circulation flow passage through elastic deformation in correspondence with a pressure.
    Type: Application
    Filed: September 12, 2016
    Publication date: September 13, 2018
    Inventors: Yoshinori ASAKA, Takashi MATSUO