Patents by Inventor Miharu Yoshida

Miharu Yoshida 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).

  • Nozzle plate for ink jet recording apparatus and method of preparing said nozzle plate
    Patent number: 6357857
    Abstract: The entire part of a rear surface 2 of a nozzle plate 1 excluding peripheral portions 6 of nozzle holes 4 is coated with a resist tape, and this nozzle plate 1 is immersed in an electrolytic solution in which ions of a metal and particles of a water-repellent resin are dispersed to provide a plating thereon, and the plated nozzle plate 1 in the electrolytic solution is then heated to a temperature that is higher than a melting point of the water-repellent resin, whereby an entire portion extending from a front surface 3 of the nozzle plate 1 and the nozzle holes 4 contiguous to the front surface to the rear surface 2 is provided with a eutectoid plating layer 10 to suppress deviation of the passage of ink droplets due to wetting by an ink or the like.
    Type: Grant
    Filed: January 6, 2000
    Date of Patent: March 19, 2002
    Inventors: Kiyohiko Takemoto, Miharu Yoshida, Shuichi Yayaguchi, Takeshi Kobayashi, Masanori Kamijo, Akio Yamamori
  • Method of preparing the nozzle plate
    Patent number: 6016601
    Abstract: The entire part of a rear surface 2 of a nozzle plate 1 excluding peripheral portions 6 of nozzle holes 4 is coated with a resist tape, and this nozzle plate 1 is immersed in an electrolytic solution in which ions of a metal and particles of a water-repellent resin are dispersed to provide a plating thereon, and the plated nozzle plate 1 in the electrolytic solution is then heated to a temperature that is higher than a melting point of the water-repellent resin, whereby an entire portion extending from a front surface 3 of the nozzle plate 1 and the nozzle holes 4 contiguous to the front surface to the rear surface 2 is provided with a eutectoid plating layer 8 to suppress deviation of the passage of ink droplets due to wetting by an ink or the like.
    Type: Grant
    Filed: May 28, 1996
    Date of Patent: January 25, 2000
    Assignee: Seiko Epson Corporation
    Inventors: Kiyohiko Takemoto, Miharu Yoshida, Shuichi Yayaguchi, Takeshi Kobayashi, Masanori Kamijo, Akio Yamamori
  • Nozzle plate for ink jet recording apparatus and method of preparing said nozzle plate
    Patent number: 6000783
    Abstract: The entire part of a rear surface 2 of a nozzle plate 1 excluding peripheral portions 6 of nozzle holes 4 is coated with a resist tape, and this nozzle plate 1 is immersed in an electrolytic solution in which ions of a metal and particles of a water-repellent resin are dispersed to provide a plating thereon, and the plated nozzle plate 1 in the electrolytic solution is then heated to a temperature that is higher than a melting point of the water-repellent resin, whereby an entire portion extending from a front surface 3 of the nozzle plate 1 and the nozzle holes 4 contiguous to the front surface to the rear surface 2 is provided with a eutectoid plating layer 8 to suppress deviation of the passage of ink droplets due to wetting by an ink or the like.
    Type: Grant
    Filed: September 28, 1993
    Date of Patent: December 14, 1999
    Assignee: Seiko Epson Corporation
    Inventors: Kiyohiko Takemoto, Miharu Yoshida, Shuichi Yayaguchi, Takeshi Kobayashi, Masanori Kamijo, Akio Yamamori
  • Color ink composition and color ink jet printing method
    Patent number: 5560771
    Abstract: A yellow ink composition, a magenta ink composition and cyan ink composition and a solvent system which are suitable for a color ink jet printing method are disclosed. These ink compositions can realize ideal color tones without limitation of properties of paper. Moreover, these ink compositions are excellent in intermittent jetting stability. The color ink jet printing method is also disclosed. In this method, ink compositions are overprinted to mix colors. Colors obtained by the color mixing have an ideal color tone.
    Type: Grant
    Filed: March 29, 1995
    Date of Patent: October 1, 1996
    Assignee: Seiko Epson Corporation
    Inventors: Kiyohiko Takemoto, Hiroyuki Onishi, Masaaki Itano, Yoshiyuki Koike, Etsuko Yoshiike, Miharu Yoshida, Hiroko Hayashi, Kazuhide Kubota
  • Black ink composition excellent in black
    Patent number: 5439517
    Abstract: An ink composition excellent in blackness and storage stability is disclosed which comprises a first dye represented by the following general formula (I) and a second dye selected from the group consisting of C.I.
    Type: Grant
    Filed: November 9, 1993
    Date of Patent: August 8, 1995
    Assignee: Seiko Epson Corporation
    Inventors: Miharu Yoshida, Hiroko Hayashi
  • Nozzle plate for ink jet recording apparatus and method of preparing a said nozzle plate
    Patent number: 5387440
    Abstract: The entire part of a rear surface 2 of a nozzle plate 1 excluding peripheral portions 6 of nozzle holes 4 is coated with a resist tape, and this nozzle plate 1 is immersed in an electrolytic solution in which ions of a metal and particles of a water-repellent resin are dispersed to provide a plating thereon, and the plated nozzle plate 1 in the electrolytic solution is then heated to a temperature that is higher than a melting point of the water-repellent resin, whereby an entire portion extending from a front surface 3 of the nozzle plate 1 and the nozzle holes 4 contiguous to the front surface to the rear surface 2 is provided with a eutectoid plating layer 8 to suppress deviation of the passage of ink droplets due to wetting by an ink or the like.
    Type: Grant
    Filed: March 29, 1993
    Date of Patent: February 7, 1995
    Assignee: Seiko Epson Corporation
    Inventors: Kiyohiko Takemoto, Miharu Yoshida, Shuichi Yayaguchi, Takeshi Kobayashi, Masanori Kamijo, Akio Yamamori