Patents by Inventor Hideyuki Haragakiuchi

Hideyuki Haragakiuchi 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: 5761568
    Abstract: An electrophotographic imaging apparatus includes a toner image holding body, a transcription unit for transcribing the toner image on the toner image holding body onto a recording medium, and a conveyor for conveying a recording medium toward the toner image holding body and transcription unit. A judging device will judge whether printing is of a first page or not and if it is decided that printing is to be performed on a first page, a first measuring device will measure the electrical characteristic of the toner image holding body prior to the feeding of a recording medium and a transcription voltage will be set depending of this measured result. Thereafter, the recording medium will be conveyed toward the transcription unit where the electrical characteristics of the non-printing region on the recording medium will be measured via a second measuring device and the transcription voltage will be further adjusted.
    Type: Grant
    Filed: December 27, 1996
    Date of Patent: June 2, 1998
    Assignee: Hitachi, Ltd.
    Inventors: Hideyuki Haragakiuchi, Hiroyuki Tadokoro, Nobuaki Fukasawa, Akira Sasaki, Isamu Terashima, Masashi Yamamoto
  • Patent number: 5555074
    Abstract: The disclosure is concerned with an electrophotographic apparatus comprising a toner image supporting member on which a toner image developed on an electrostatic latent image is formed, transferring means for transferring the toner image on said toner image supporting member to a recording medium, conveying means for bringing the recording medium into contact with the image supporting member, a fixing roller and a compression roller in contact with each other to fix the toner image on the recording medium, heating means disposed inside at least one of the fixing roller and the compression roller, wherein there are provided temperature detection means for detecting the surface temperature of the fixing roller and state detection means for detecting the state of the fixing apparatus before starting of the fixing apparatus.
    Type: Grant
    Filed: January 10, 1995
    Date of Patent: September 10, 1996
    Assignee: Hitachi, Ltd.
    Inventors: Hideyuki Haragakiuchi, Hiroyuki Tadokoro, Nobuaki Fukasawa, Isamu Terashima, Akira Sasaki, Kazuyoshi Matsuo, Katuyoshi Onose, Masashi Okuhama