Patents by Inventor Shohji Tanaka

Shohji Tanaka 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).

  • Patent number: 8086141
    Abstract: An electric charging apparatus charges a surface of a charging object. The electric charging apparatus includes an electric field forming device including two electrodes facing each other that form an electric field therebetween. An electron discharging member is provided at a portion of one of the two electrodes that faces the other electrode and discharges electrons into the electric field. The electric charging apparatus also includes a voltage applying controller that controls a voltage applied to the two electrodes. The voltage applying controller selects two or more nonzero intensities of the electric field.
    Type: Grant
    Filed: March 19, 2008
    Date of Patent: December 27, 2011
    Assignee: Ricoh Company, Ltd.
    Inventors: Yukimichi Someya, Eiichi Ohta, Naomi Sugimoto, Takuro Sekiya, Yasuo Katano, Shohji Tanaka, Yoshihiko Iijima, Toshihiro Ishii
  • Patent number: 7749638
    Abstract: A manufacturing method of a lamination body of an electrolytic body and a particle includes the steps of: a) electrostatically charging an electrostatic carrier configured to carry static electricity at a designated polarity; b) contacting the electrostatically charged electrostatic carrier with dispersion liquid formed by dispersing the particle electrostatically charged at a polarity reversed to the designated polarity into a dispersion medium; and c) transferring the particle adhering to the electrostatic carrier to the electrolytic body made of electrolyte.
    Type: Grant
    Filed: March 17, 2005
    Date of Patent: July 6, 2010
    Assignee: Ricoh Company, Ltd.
    Inventors: Okitoshi Kimura, Shohji Tanaka, Aino Hasegawa
  • Patent number: 7728503
    Abstract: An electron emission element according to the present invention is compact, thin and low cost, and has a structure and constitution in which deterioration of the electron emission material itself is low. In the electron emission element, boron nitride material is used as the electron emission material, and a metal material or a semiconductor material is used as a substrate for forming the boron nitride material. In this way it is possible to obtain good quality boron nitride material on the substrate. Also, a voltage can be applied to the material to emit electrons, also electrons can be supplied. Moreover, by using Sp3-bonded boron nitride as the boron nitride material, and using Sp3-bonded 5H—BN material or Sp3-bonded 6H—BN material as the Sp3-bonded boron nitride, a field electron emission element can be achieved for which high efficiency electron emission characteristics unprecedented in conventional art can be obtained.
    Type: Grant
    Filed: March 28, 2007
    Date of Patent: June 1, 2010
    Assignee: Ricoh Company, Ltd.
    Inventors: Eiichi Ohta, Takuro Sekiya, Naomi Sugimoto, Yukimichi Someya, Shohji Tanaka, Yasuo Katano, Yoshihiko Iijima, Toshihiro Ishii
  • Publication number: 20100073697
    Abstract: An electric charging apparatus and an image forming apparatus using the electric charging apparatus, capable of stably discharging electrons and reducing deterioration in an electron discharging member, which includes an electric field forming device including two electrodes facing each other to form electric field therebetween including an electron discharging member provided at a portion of one of the electrodes, where the portion faces the other electrode, to discharge electrons into the electric field, and a voltage applying controller to control voltage applied to the electrodes, wherein the voltage applying controller selects two or more intensities of the electric field.
    Type: Application
    Filed: March 19, 2008
    Publication date: March 25, 2010
    Inventors: Yukimichi Someya, Eiichi Ohta, Naomi Sugimoto, Takuro Sekiya, Yasuo Katano, Shohji Tanaka, Yoshihiko Iijima, Toshihiro Ishii
  • Publication number: 20070281200
    Abstract: An anode is formed by a metal electrocatalyst including an element mixture made up of platinum and at least one of ruthenium and molybdenum as an active constituent which electrocatalyst is fabricated under vacuum using a vapor phase method, and in this way, the speed of electrode oxidation reaction of alcohol such as methanol, ethanol, and isopropyl alcohol may be substantially increased. Also, by using such an electrocatalyst as the anode, a direct alcohol fuel cell with a high output may be realized using alcohol that is not reformed as fuel.
    Type: Application
    Filed: March 31, 2005
    Publication date: December 6, 2007
    Inventors: Shohji Tanaka, Okitoshi Kimura, Aino Hasegawa, Yuuma Usui
  • Publication number: 20070231010
    Abstract: An electron emission element according to the present invention is compact, thin and low cost, and has a structure and constitution in which deterioration of the electron emission material itself is low. In the electron emission element, boron nitride material is used as the electron emission material, and a metal material or a semiconductor material is used as a substrate for forming the boron nitride material. In this way it is possible to obtain good quality boron nitride material on the substrate. Also, a voltage can be applied to the material to emit electrons, also electrons can be supplied. Moreover, by using Sp3-bonded boron nitride as the boron nitride material, and using Sp3-bonded 5H—BN material or Sp3-bonded 6H—BN material as the Sp3-bonded boron nitride, a field electron emission element can be achieved for which high efficiency electron emission characteristics unprecedented in conventional art can be obtained.
    Type: Application
    Filed: March 28, 2007
    Publication date: October 4, 2007
    Inventors: Eiichi Ohta, Takuro Sekiya, Naomi Sugimoto, Yukimichi Someya, Shohji Tanaka, Yasuo Katano, Yoshihiko Iijima, Toshihiro Ishii
  • Publication number: 20050250001
    Abstract: A manufacturing method of a lamination body of an electrolytic body and a particle includes the steps of: a) electrostatically charging an electrostatic carrier configured to carry static electricity at a designated polarity; b) contacting the electrostatically charged electrostatic carrier with dispersion liquid formed by dispersing the particle electrostatically charged at a polarity reversed to the designated polarity into a dispersion medium; and c) transferring the particle adhering to the electrostatic carrier to the electrolytic body made of electrolyte.
    Type: Application
    Filed: March 17, 2005
    Publication date: November 10, 2005
    Inventors: Okitoshi Kimura, Shohji Tanaka, Aino Hasegawa
  • Patent number: 6493529
    Abstract: A charging device which charges a body to be charged. At least a pair of linear electrodes is provided on a substrate so as to be close to each other. Walls are provided near the linear electrodes. Each of the walls has a height larger than a line width of each of the linear electrodes. The linear electrodes are surrounded by the walls and the substrate. The charging device alternatively includes a plurality of dielectrics and electrodes disposed along a first direction facing a drum so that the plurality of dielectrics sandwich the plurality of electrodes along a second direction perpendicular to the first direction, the dielectrics have a height larger than a height of the electrodes along the first direction, and at least two neighboring electrodes have different shapes.
    Type: Grant
    Filed: July 3, 2000
    Date of Patent: December 10, 2002
    Assignee: Ricoh Company, Ltd.
    Inventors: Kazuhiko Umemura, Tomoaki Sugawara, Tatsuya Sato, Hiroshi Kondo, Shohji Tanaka