Patents by Inventor Youichi Kubomura

Youichi Kubomura 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 printer and ink for ink jet recording
    Patent number: 6176912
    Abstract: An ink jet printer is disclosed, which jets a water-soluble ink from a recording head comprising at least an ink passage-forming member and an orifice through the orifice to form flying droplets which form a dot image on a recording medium, wherein at least a portion of the ink passage-forming member is composed of borosilicate glass and the water-soluble ink comprises at least one of urea and thiourea. Further, an ink for use in the ink jet printer is also disclosed.
    Type: Grant
    Filed: June 22, 1999
    Date of Patent: January 23, 2001
    Assignee: Seiko Epson Corporation
    Inventors: Kenichi Kato, Chiyoshige Nakazawa, Kazuhiko Sato, Hiroshi Mukai, Katsuko Aoki, Youichi Kubomura
  • Ink jet printer and ink for ink jet recording
    Patent number: 5972086
    Abstract: An ink jet printer is disclosed, which jets a water-soluble ink from a recording head comprising at least an ink passage-forming member and an orifice through the orifice to form flying droplets which form a dot image on a recording medium, wherein at least a portion of the ink passage-forming member is composed of borosilicate glass and the water-soluble ink comprises at least one of urea and thiourea. Further, an ink for use in the ink jet printer is also disclosed.
    Type: Grant
    Filed: August 27, 1996
    Date of Patent: October 26, 1999
    Assignee: Seiko Epson Corporation
    Inventors: Kenichi Kato, Chiyoshige Nakazawa, Kazuhiko Sato, Hiroshi Mukai, Katsuko Aoki, Youichi Kubomura
  • Water-soluble ink for ink jet type recording and ink jet type recording apparatus using same
    Patent number: 5892528
    Abstract: A water-soluble ink for ink jet type recording is disclosed, which comprises water, a water-soluble dye, a wetting agent and a surfactant, wherein said surfactant is a mixture comprising a compound represented by the following formula (A): ##STR1## wherein R represents a halogen atom or an alkyl group; and n represents a positive integer, and a compound represented by the following formula (B): ##STR2## The water-soluble ink for ink jet type recording may provide a high quality printed image having a large printed dot diameter on various kinds of papers such as ordinary paper and poor quality paper with a reduced amount of ink.
    Type: Grant
    Filed: May 26, 1995
    Date of Patent: April 6, 1999
    Assignee: Seiko Epson Corporation
    Inventors: Chiyoshige Nakazawa, Kenichi Kato, Katsuko Aoki, Youichi Kubomura, Hiroshi Mukai
  • Water-soluble ink, ink jet printer and method of printing thereof
    Patent number: 5397386
    Abstract: A plastic ink jet recording head is provided utilizing a water-soluble ink comprised of water-soluble dye having the chemical structure of: ##STR1## The ink composition comprises a surfactant in the range 0.01 wt. to 0.1 wt. of having an acetylene glycol surfactant having a chemical structure of: ##STR2## and an acetylene glycol-ethylene oxide adduct is provided having a chemical of: ##STR3## wherein m and n are each integers of at least 1.
    Type: Grant
    Filed: March 2, 1994
    Date of Patent: March 14, 1995
    Assignee: Seiko Epson Corporation
    Inventors: Chiyoshige Nakazawa, Youichi Kubomura, Shigeo Sugimura