Patents by Inventor Kenichi Shishido

Kenichi Shishido 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).

  • Photoreceptor regenerating apparatus and image forming apparatus using regenerated photoreceptor and method of regenerating photoreceptor
    Patent number: 6763208
    Abstract: A photoreceptor regenerating apparatus for regenerating a photoreceptor for use in an image forming apparatus including a grinding member that grinds a surface of a used photoreceptor, a photoreceptor measuring device that measures a surface condition of the used photoreceptor, and a grinding condition setting device that sets grinding conditions of the grinding member according to a measurement value of the photoreceptor measuring device.
    Type: Grant
    Filed: March 22, 2002
    Date of Patent: July 13, 2004
    Assignee: Ricoh Company, Ltd.
    Inventors: Shinji Nagatsuna, Takeshi Saitou, Takeo Suda, Kenichi Shishido, Masaki Narita
  • Reusable photoreceptor and image forming apparatus using the reusable photoreceptor and method of reusing photoreceptor
    Patent number: 6560414
    Abstract: In a photoreceptor for an image forming apparatus including a charging device, a relationship between a thickness “A” of a surface portion of a photosensitive layer abraded by image forming operations, a thickness “B” of a portion of the photosensitive layer ground by an operation of grinding the abraded surface of the photosensitive layer, a number of times “n” the operation of grinding the abraded surface of the photosensitive layer has been executed, and an original photosensitive layer thickness “C” of the photoreceptor is set such that a thickness “D” of a remaining portion of the photosensitive layer after having been ground which is obtained by equation: D=C−[(A+B)×n+A], is equal to or greater than a thickness of the photosensitive layer in which leakage from the charging device to the photoreceptor does not occur, so that the photoreceptor may be reused.
    Type: Grant
    Filed: November 21, 2001
    Date of Patent: May 6, 2003
    Assignee: Ricoh Company, Ltd.
    Inventors: Takeo Suda, Takeshi Saitou, Masaki Narita, Shinji Nagatsuna, Kenichi Shishido
  • Photoreceptor regenerating apparatus and image forming apparatus using regenerated photoreceptor and method of regenerating photoreceptor
    Publication number: 20020136565
    Abstract: A photoreceptor regenerating apparatus for regenerating a photoreceptor for use in an image forming apparatus including a grinding member that grinds a surface of a used photoreceptor, a photoreceptor measuring device that measures a surface condition of the used photoreceptor, and a grinding condition setting device that sets grinding conditions of the grinding member according to a measurement value of the photoreceptor measuring device.
    Type: Application
    Filed: March 22, 2002
    Publication date: September 26, 2002
    Inventors: Shinji Nagatsuna, Takeshi Saitou, Takeo Suda, Kenichi Shishido, Masaki Narita
  • Reusable photoreceptor and image forming apparatus using the reusable photoreceptor and method of reusing photoreceptor
    Publication number: 20020090221
    Abstract: In a photoreceptor for an image forming apparatus including a charging device, a relationship between a thickness “A” of a surface portion of a photosensitive layer abraded by image forming operations, a thickness “B” of a portion of the photosensitive layer ground by an operation of grinding the abraded surface of the photosensitive layer, a number of times “n” the operation of grinding the abraded surface of the photosensitive layer has been executed, and an original photosensitive layer thickness “C” of the photoreceptor is set such that a thickness “D” of a remaining portion of the photosensitive layer after having been ground which is obtained by equation: D=C−[(A+B)×n+A], is equal to or greater than a thickness of the photosensitive layer in which leakage from the charging device to the photoreceptor does not occur, so that the photoreceptor may be reused.
    Type: Application
    Filed: November 21, 2001
    Publication date: July 11, 2002
    Inventors: Takeo Suda, Takeshi Saitou, Masaki Narita, Shinji Nagatsuna, Kenichi Shishido