Patents by Inventor Keiji Tsutaoka

Keiji Tsutaoka 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: 8570611
    Abstract: An image reading apparatus including a shading correction mechanism that can be formed by fewer component parts than conventional ones, and is increased in the degree of freedom of design, thereby enabling reduction of the size and weight thereof. A contact glass guides an original to an image reading position. A glass holding member holds the glass. A line image sensor reads an image on the original conveyed to the image reading location, through the contact glass. A reference member is disposed at a location different from the image reading location on the contact glass. A moving mechanism relatively moves the line image sensor and the reference member so that the line image sensor can alternatively read the original conveyed to the image reading location and the reference member. A drive section externally drives the moving mechanism to move the line image sensor and/or the reference member.
    Type: Grant
    Filed: November 15, 2012
    Date of Patent: October 29, 2013
    Assignee: Canon Denshi Kabushiki Kaisha
    Inventors: Jun Tanaka, Takashi Machida, Shinobu Kato, Keiji Tsutaoka, Taketo Ochiai, Masahiro Shirai, Shigeru Ikezaki, Hirotaka Watanabe
  • Publication number: 20130077133
    Abstract: An image reading apparatus including a shading correction mechanism that can be formed by fewer component parts than conventional ones, and is increased in the degree of freedom of design, thereby enabling reduction of the size and weight thereof. A contact glass guides an original to an image reading position. A glass holding member holds the glass. A line image sensor reads an image on the original conveyed to the image reading location, through the contact glass. A reference member is disposed at a location different from the image reading location on the contact glass. A moving mechanism relatively moves the line image sensor and the reference member so that the line image sensor can alternatively read the original conveyed to the image reading location and the reference member. A drive section externally drives the moving mechanism to move the line image sensor and/or the reference member.
    Type: Application
    Filed: November 15, 2012
    Publication date: March 28, 2013
    Inventors: JUN TANAKA, TAKASHI MACHIDA, SHINOBU KATO, KEIJI TSUTAOKA, TAKETO OCHIAI, MASAHIRO SHIRAI, SHIGERU IKEZAKI, HIROTAKA WATANABE
  • Patent number: 8335021
    Abstract: An image reading apparatus including a shading correction mechanism that can be formed by fewer component parts than conventional ones, and is increased in the degree of freedom of design, thereby enabling reduction of the size and weight thereof. A contact glass guides an original to an image reading position. A glass holding member holds the glass. A line image sensor reads an image on the original conveyed to the image reading location, through the contact glass. A reference member is disposed at a location different from the image reading location on the contact glass. A moving mechanism relatively moves the line image sensor and the reference member so that the line image sensor can alternatively read the original conveyed to the image reading location and the reference member. A drive section externally drives the moving mechanism to move the line image sensor and/or the reference member.
    Type: Grant
    Filed: March 21, 2007
    Date of Patent: December 18, 2012
    Assignee: Canon Denshi Kabushiki Kaisha
    Inventors: Jun Tanaka, Takashi Machida, Shinobu Kato, Keiji Tsutaoka, Taketo Ochiai, Masahiro Shirai, Shigeru Ikezaki, Hirotaka Watanabe
  • Patent number: 8164804
    Abstract: An image reading apparatus which is capable of performing accurate shading correction with simple arrangement while preventing a reference member from being scratched and preventing paper powder and the like dust from being deposited on the reference member. The image reading apparatus includes an image reading unit in which a contact glass guides an original on an image reading location. The contact glass is held by a glass holding member. A line image sensor reads the image on the original conveyed on the image reading location, through the contact glass. The image reading unit further includes a reference member whose image is readable by the image sensor, and a moving mechanism to move the image sensor so as to enable the image sensor to alternatively read the original and a reference surface of the reference member.
    Type: Grant
    Filed: June 17, 2011
    Date of Patent: April 24, 2012
    Assignee: Canon Denshi Kabushiki Kaisha
    Inventors: Jun Tanaka, Takashi Machida, Shinobu Kato, Keiji Tsutaoka, Taketo Ochiai, Tetsurou Ishikawa
  • Publication number: 20110249302
    Abstract: An image reading apparatus which is capable of performing accurate shading correction with simple arrangement while preventing a reference member from being scratched and paper powder and the like dust from being deposited on the reference member. The image reading apparatus comprises an image reading unit. In the image reading unit, a contact glass guides an original on an image reading location. The contact glass is held by a glass holding member. A line image sensor reads the image on the original conveyed on the image reading location, through the contact glass. The image reading unit further comprises a reference member whose image is readable by the image sensor, and a moving mechanism to move the image sensor so as to enable the image sensor to alternatively read the original and a reference surface of the reference member.
    Type: Application
    Filed: June 17, 2011
    Publication date: October 13, 2011
    Applicant: CANON DENSHI KABUSHIKI KAISHA
    Inventors: Jun Tanaka, Takashi Machida, Shinobu Kato, Keiji Tsutaoka, Taketo Ochiai, Tetsurou Ishikawa
  • Publication number: 20070223061
    Abstract: An image reading apparatus which is capable of performing accurate shading correction with simple arrangement while preventing a reference member from being scratched and paper powder and the like dust from being deposited on the reference member. The image reading apparatus comprises an image reading unit. In the image reading unit, a contact glass guides an original on an image reading location. The contact glass is held by a glass holding member. A line image sensor reads the image on the original conveyed on the image reading location, through the contact glass. The image reading unit further comprises a reference member whose image is readable by the image sensor, and a moving mechanism to move the image sensor so as to enable the image sensor to alternatively read the original and a reference surface of the reference member.
    Type: Application
    Filed: March 21, 2007
    Publication date: September 27, 2007
    Applicant: CANON DENSHI KABUSHIKI KAISHA
    Inventors: Jun Tanaka, Takashi Machida, Shinobu Kato, Keiji Tsutaoka, Taketo Ochiai, Tetsurou Ishikawa
  • Publication number: 20070223062
    Abstract: An image reading apparatus including a shading correction mechanism that can be formed by fewer component parts than conventional ones, and is increased in the degree of freedom of design, thereby enabling reduction of the size and weight thereof. A contact glass guides an original to an image reading position. A glass holding member holds the glass. A line image sensor reads an image on the original conveyed to the image reading location, through the contact glass. A reference member is disposed at a location different from the image reading location on the contact glass. A moving mechanism relatively moves the line image sensor and the reference member so that the line image sensor can alternatively read the original conveyed to the image reading location and the reference member. A drive section externally drives the moving mechanism to move the line image sensor and/or the reference member.
    Type: Application
    Filed: March 21, 2007
    Publication date: September 27, 2007
    Applicant: CANON DENSHI KABUSHIKI KAISHA
    Inventors: Jun Tanaka, Takashi Machida, Shinobu Kato, Keiji Tsutaoka, Taketo Ochiai, Masahiro Shirai, Shigeru Ikezaki, Hirotaka Watanabe