Patents by Inventor Tsutomu Yokouchi

Tsutomu Yokouchi 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).

  • Publication number: 20030218655
    Abstract: An inkjet recording head includes nozzles arrayed in one direction and ink droplet ejecting devices formed in the respective nozzles. Each nozzle has a height difference in a depthwise direction on a side on which ink droplets are ejected and an ink liquid surface is formed between both edges forming the height difference. An inkjet printer uses this inkjet recording head. The inkjet recording head can eject ink obliquely to the ejection surface for correcting recording pitches at joining portions and preventing the periphery of the nozzles from being contaminated by the ink splashed back from image receiving paper. The ejection angle and the ejecting direction can also be suitably selected and adjusted.
    Type: Application
    Filed: March 28, 2003
    Publication date: November 27, 2003
    Inventors: Tsutomu Yokouchi, Kazuo Sanada, Kazuhiro Tsujita
  • Publication number: 20030085973
    Abstract: There is provided an ink jet head including a first drive element which is provided in correspondence with each ink jet nozzle and which has a thin film resistor for ejecting ink droplets from each ink jet nozzle and a thin film conductive electrode for feeding electricity to the thin film resistor, a second drive element which is formed in a vicinity of the first drive element and which vibrates ink in each ink jet nozzle corresponding to the first drive element for changing a meniscus position and a drive signal control device which controls at least one of a drive signal given to the first drive element and a drive signal given to the second drive element so that the ink droplets can be ejected at a desired meniscus position of the ink in each ink jet nozzle. There is also provided an ink jet printer using the ink jet head. The size of ink droplets can be made uniform, whereby a high-quality image can be recorded.
    Type: Application
    Filed: September 26, 2002
    Publication date: May 8, 2003
    Inventor: Tsutomu Yokouchi