Patents by Inventor Yoshinori Kawaai

Yoshinori Kawaai 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).

  • Electrophotographic printing apparatus and printing system
    Patent number: 7477869
    Abstract: In an electrophotographic printing apparatus for printing an image to an image transfer sheet medium by producing a latent image on a photosensitive unit and transferring the latent image to the image transfer sheet medium, a width-directional position of the image transfer sheet medium is detected before the latent image is produced and the same after the latent image is produced on the photosensitive unit by the width-directional positional sensor, and the detection results are compared with one another; and it is determined from the comparison result whether or not printing operation is continued.
    Type: Grant
    Filed: May 26, 2005
    Date of Patent: January 13, 2009
    Assignee: Ricoh Company, Ltd.
    Inventors: Yoshinori Kawaai, Sadanori Kobashi, Kazutoshi Obara, Kiyoshi Suzuki
  • Electrophotographic printing apparatus and printing system
    Publication number: 20050265761
    Abstract: In an electrophotographic printing apparatus for printing an image to an image transfer sheet medium by producing a latent image on a photosensitive unit and transferring the latent image to the image transfer sheet medium, a width-directional position of the image transfer sheet medium is detected before the latent image is produced and the same after the latent image is produced on the photosensitive unit by the width-directional positional sensor, and the detection results are compared with one another; and it is determined from the comparison result whether or not printing operation is continued.
    Type: Application
    Filed: May 26, 2005
    Publication date: December 1, 2005
    Inventors: Yoshinori Kawaai, Sadanori Kobashi, Kazutoshi Obara, Kiyoshi Suzuki
  • Image forming unit system
    Patent number: 6139012
    Abstract: In an image forming unit system, a sheet handling unit having a fixed sheet carrying-in rate is connected to an image forming unit having a sheet ejection rate controlled variably so that stable sheet carrying can be achieved. The sheet carrying rate (VF) of a sheet carrying-in roller pair (26) provided in a sheet handling unit (2) is defined to be higher than the sheet carrying rate (VU and VD) of a sheet ejection roller pair (16) provided in an image forming unit (1). The pressing force (F2) between the rollers of the sheet carrying-in roller pair is defined to be smaller than the pressing force (F1) between the rollers of the sheet ejection roller pair.
    Type: Grant
    Filed: May 13, 1999
    Date of Patent: October 31, 2000
    Assignee: Hitachi Koki Co., Ltd.
    Inventors: Nobuyuki Furuya, Yoshihiko Sano, Sadanori Kobashi, Yoshinori Kawaai