Patents by Inventor Youichiroh Miyaguchi

Youichiroh Miyaguchi 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).

  • Image forming apparatus capable of a color image, and image forming method for forming a color image
    Patent number: 7796294
    Abstract: An image forming apparatus for forming a color image, including a charging device configured to charge a moving image bearing member; a writing device configured to form a latent image the image bearing member by exposing a plurality of colors according to image information; and a developing device configured to develop the latent image with toner, wherein the writing device and the developing device are configured to perform exposure and development more than once to the image bearing member, which is charged once by the charging device so that the color image is formed from superimposed toner of each of the plurality of colors on the image bearing member.
    Type: Grant
    Filed: July 7, 2006
    Date of Patent: September 14, 2010
    Assignee: Ricoh Company, Ltd.
    Inventors: Katsuo Sakai, Tomoko Takahashi, Youichiroh Miyaguchi
  • Powder transferring device capable of detecting an amount of the powder
    Patent number: 7593657
    Abstract: A powder transferring apparatus provided with a powder electrostatic transferring device includes a plurality of transferring electrodes configured to generate an electric field for transferring the powder by an electrostatic force including a powder transferring amount detecting device to detect an amount of powder on a surface of the powder electrostatic transferring device.
    Type: Grant
    Filed: July 27, 2006
    Date of Patent: September 22, 2009
    Assignee: Ricoh Company, Ltd.
    Inventors: Tomoko Takahashi, Youichiroh Miyaguchi, Yoshinori Nakagawa, Masaaki Yamada, Nobuaki Kondoh, Masanori Horike
  • Powder transferring device capable of detecting an amount of the powder
    Publication number: 20070025775
    Abstract: A powder transferring apparatus provided with a powder electrostatic transferring device includes a plurality of transferring electrodes configured to generate an electric field for transferring the powder by an electrostatic force including a powder transferring amount detecting device to detect an amount of powder on a surface of the powder electrostatic transferring device.
    Type: Application
    Filed: July 27, 2006
    Publication date: February 1, 2007
    Inventors: Tomoko Takahashi, Youichiroh Miyaguchi, Yoshinori Nakagawa, Masaaki Yamada, Nobuaki Kondoh, Masanori Horike
  • Image forming apparatus capable of a color image, and image forming method for forming a color image
    Publication number: 20070013924
    Abstract: An image forming apparatus for forming a color image, including a charging device configured to charge a moving image bearing member; a writing device configured to form a latent image the image bearing member by exposing a plurality of colors according to image information; and a developing device configured to develop the latent image with toner, wherein the writing device and the developing device are configured to perform exposure and development more than once to the image bearing member, which is charged once by the charging device so that the color image is formed from superimposed toner of each of the plurality of colors on the image bearing member.
    Type: Application
    Filed: July 7, 2006
    Publication date: January 18, 2007
    Inventors: Katsuo Sakai, Tomoko Takahashi, Youichiroh Miyaguchi