Patents by Inventor Masayuki Onitsuka

Masayuki Onitsuka 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 recording head structure, ink jet printer, powder molding method, method of manufacturing recording head structure supporting member, and powder molding press apparatus
    Patent number: 7097286
    Abstract: The ink delivery hole 11 of the support member 10 made of ceramics that supports the recording head 2 consists of the elongated hole 12 provided with the inclined bottom surface 13 that opens on the ink jet recording head side and deepens toward the center and the small-diameter hole 14 that communicates therewith, while surface roughness of at least the inclined bottom surface 13 of the ink delivery hole 11 is set in a range from 0.4 to 1.0 ?m in terms of arithmetic mean roughness (Ra) and the void ratio is set in a range from 5 to 30%. This constitution prevents bubbles, if ever entered, from staying in the ink delivery hole of the support member that supports the ink jet recording head, and enables it to stably discharge ink droplets of a predetermined quantity.
    Type: Grant
    Filed: November 12, 2003
    Date of Patent: August 29, 2006
    Assignee: Kyocera Corporation
    Inventors: Takehisa Higa, Akio Yuguchi, Masayuki Onitsuka
  • Ink jet recording head structure, ink jet printer, powder moldingmethod, method of manufacturing recording head structure supporting member, and powder molding press apparatus
    Publication number: 20050099456
    Abstract: The ink delivery hole 11 of the support member 10 made of ceramics that supports the recording head 2 consists of the elongated hole 12 provided with the inclined bottom surface 13 that opens on the ink jet recording head side and deepens toward the center and the small-diameter hole 14 that communicates therewith, while surface roughness of at least the inclined bottom surface 13 of the ink delivery hole 11 is set in a range from 0.4 to 1.0 m in terms of arithmetic mean roughness (Ra) and the void ratio is set in a range from 5 to 30%. This constitution prevents bubbles, if ever entered, from staying in the ink delivery hole of the support member that supports the ink jet recording head, and enables it to stably discharge ink droplets of a predetermined quantity.
    Type: Application
    Filed: November 12, 2003
    Publication date: May 12, 2005
    Inventors: Takehisa Higa, Akio Yuguchi, Masayuki Onitsuka