Patents by Inventor Mamoru Yorimoto

Mamoru Yorimoto 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: 9370930
    Abstract: A nozzle testing device includes: a two-dimensional image sensor to capture an image of a pattern formed on a recording object by discharging ink from a nozzle row while moving the nozzle row and the recording object relative to each other in a direction orthogonal to the nozzle row; a light source unit provided such that regularly reflected light by the pattern forms a regular reflection area in the image of the pattern captured by the two-dimensional image sensor; and a detection unit to analyze the image to detect discharge failure of the nozzles. The regular reflection area is formed in the image such that a dimension in a direction corresponding to the direction of relative movement between the nozzle row and the recording object is greater than a dimension in a direction orthogonal to the direction corresponding to the direction of relative movement in the image.
    Type: Grant
    Filed: June 29, 2015
    Date of Patent: June 21, 2016
    Assignee: RICOH COMPANY, LTD.
    Inventors: Daisaku Horikawa, Nobuyuki Satoh, Mamoru Yorimoto, Kenji Morita, Masayuki Fujii, Suguru Yokozawa, Masahiro Hiranuma, Yuichi Sakurada, Tomohiro Sasa, Masaya Kawarada
  • Publication number: 20160171348
    Abstract: An imaging device includes: a sensor unit that is arranged at a predetermined position inside a casing, and that images a subject outside the casing through an opening portion, with a part of an imaging region, while imaging a reference chart with another part of the imaging region; and a light absorption member that is arranged in an optical path of light from a illumination light source toward a specular-reflection position from which specular-reflection light of the illumination light source is entered to the sensor unit, in the imaging range. The light absorption member has at least a first surface on which light from the illumination light source toward the specular-reflection position is irradiated, and a second surface that faces to the first surface, and reflected light that has been reflected on the first surface and then on the second surface is further directed toward the first surface.
    Type: Application
    Filed: December 9, 2015
    Publication date: June 16, 2016
    Inventors: Nobuyuki SATOH, Mamoru YORIMOTO, Kenji MORITA, Masaya KAWARADA, Daisaku HORIKAWA
  • Patent number: 9367013
    Abstract: An imaging device includes: a housing having an opening in a surface thereof facing a subject; a light source that irradiates the subject with light; a two-dimensional image sensor that captures, from inside of the housing through the opening; an image of the subject illuminated by the light source; an optical member that is disposed between the two-dimensional image sensor and the opening and that transmits light reflected off the subject; and a contamination inspection member that is disposed between the opening and the optical member and that causes inspection light for inspecting contamination on the optical member to be incident upon the two-dimensional image sensor via the optical member.
    Type: Grant
    Filed: July 1, 2015
    Date of Patent: June 14, 2016
    Assignee: RICOH COMPANY, LTD.
    Inventors: Kenji Morita, Nobuyuki Satoh, Mamoru Yorimoto, Masayuki Fujii, Daisaku Horikawa, Suguru Yokozawa, Masahiro Hiranuma, Masaya Kawarada
  • Patent number: 9358813
    Abstract: A medium identification device identifies a type of a recording medium used for image formation. The medium identification device includes: a two-dimensional image sensor that captures an image of the recording medium; and an identifying unit that obtains a glossiness evaluation value indicating glossiness of the recording medium, a surface roughness evaluation value indicating surface roughness of the recording medium, and a coloring evaluation value indicating coloring of the recording medium, using image data of a specular reflection region reflecting specular reflection light from the recording medium and image data of a diffused reflection region reflecting diffused reflection light from the recording medium, the regions being in the image of the recording medium, and identifies the type of the recording medium by combining determination using the glossiness evaluation value, determination using the surface roughness evaluation value, and determination using the coloring evaluation value.
    Type: Grant
    Filed: July 29, 2015
    Date of Patent: June 7, 2016
    Assignee: RICOH COMPANY, LTD.
    Inventors: Suguru Yokozawa, Nobuyuki Satoh, Mamoru Yorimoto, Kenji Morita, Masayuki Fujii, Daisaku Horikawa
  • Patent number: 9347873
    Abstract: An image forming apparatus includes a printing unit that prints at least one object image using a color material; a color information acquiring unit that acquires color information of the object image; and a control unit that starts one of colorimetry of the object image using the color information acquired by the color information acquiring unit and color adjustment of the printing unit after a variation amount of color information of the object image measured at different points of time is equal to or smaller than a predetermined threshold.
    Type: Grant
    Filed: December 8, 2014
    Date of Patent: May 24, 2016
    Assignee: Ricoh Company, Ltd.
    Inventors: Masayuki Fujii, Nobuyuki Satoh, Mamoru Yorimoto, Masato Kobayashi, Hiroshi Matsumoto, Daisaku Horikawa, Suguru Yokozawa, Kenji Morita, Yuichi Sakurada, Tomohiro Sasa, Masaya Kawarada
  • Patent number: 9290028
    Abstract: An image forming apparatus which reads a test pattern formed by ejecting liquid droplets onto a recording medium to adjust an ejection timing of the liquid droplets is disclosed. The image forming apparatus includes an image forming unit; a reading unit; a relative movement unit; an intensity data obtaining unit which obtains intensity data on a reflected light which is received from a scanning position of a light by a light receiving unit while the light moves over the test pattern; and a position detection unit which applies a line position determining operation on the intensity data in the vicinity of a point of inflection included between an upper-limit threshold value and a lower-limit threshold value, and detects a position of a line.
    Type: Grant
    Filed: February 15, 2012
    Date of Patent: March 22, 2016
    Assignee: Ricoh Company, Ltd
    Inventors: Mamoru Yorimoto, Tatsuhiko Okada, Daisaku Horikawa, Makoto Moriwaki
  • Publication number: 20160080610
    Abstract: An image capturing device includes: a two-dimensional image sensor that captures an image of a predetermined image capture area including a subject; a light source that illuminates the image capture area; and a light blocking member that blocks light traveling from the light source toward a specular reflection position, the specular reflection position being a position that is in the image capture area and where, if light travels from the light source, the light would be specularly reflected to the two-dimensional sensor. The light blocking member is arranged outside the image capture area.
    Type: Application
    Filed: September 14, 2015
    Publication date: March 17, 2016
    Inventors: Masaya KAWARADA, Nobuyuki SATOH, Mamoru YORIMOTO, Kenji MORITA, Masahiro HIRANUMA, Daisaku HORIKAWA
  • Publication number: 20160080611
    Abstract: An imaging device comprises: a light source; a two-dimensional image sensor that receives reflected light from a subject containing specular light of the light source and outputs an image of the subject; a light transmission member disposed in an optical path of light emitted from the light source to the subject; and a light shielding unit that, when a position on the subject at which light from the light source is regularly reflected and enters the two-dimensional image sensor is defined as a first specular position, whereas a position on the light transmission member at which light from the light source is regularly reflected and enters the two-dimensional image sensor is defined as a second specular position, shields the light directed from the light source toward the second specular position without shielding the light directed from the light source toward the first specular position.
    Type: Application
    Filed: September 11, 2015
    Publication date: March 17, 2016
    Inventors: Mamoru YORIMOTO, Nobuyuki SATOH, Kenji MORITA, Masaya KAWARADA, Masahiro HIRANUMA, Daisaku HORIKAWA
  • Publication number: 20160075158
    Abstract: An image forming apparatus includes a recording head in which a plurality of nozzles for discharging liquid droplets; and a pattern forming unit configured to form a test pattern used for positional deviation adjustment including a first pattern serving as a reference pattern and a second pattern serving as an adjustment pattern. The first pattern and the second pattern each are a linear pattern that is parallel to a nozzle arrangement direction and has a disconnected portion. The disconnected portion of the first pattern and the disconnected portion of the second pattern are shifted from each other in the nozzle arrangement direction.
    Type: Application
    Filed: November 19, 2015
    Publication date: March 17, 2016
    Applicant: Ricoh Company, Ltd.
    Inventors: Tatsuhiko Okada, Mamoru Yorimoto, Daisaku Horikawa, Yuichi Sakurada, Makoto Moriwaki
  • Patent number: 9288367
    Abstract: A glossiness determining device includes: a light source; a two-dimensional sensor that receives reflected light containing a specular reflection component of a subject illuminated by the light source, and outputs an image of the subject; and a determining unit that determines glossiness of the subject by using a saturated image, which is the image of the subject output by the two-dimensional sensor and in which pixel values of a partial area are saturated.
    Type: Grant
    Filed: September 10, 2014
    Date of Patent: March 15, 2016
    Assignee: Ricoh Company, Ltd.
    Inventors: Satoshi Hirata, Nobuyuki Satoh, Yasuyuki Suzuki, Hideaki Suzuki, Satoshi Iwanami, Mamoru Yorimoto, Masayuki Fujii, Masato Kobayashi, Hiroshi Matsumoto
  • Patent number: 9286551
    Abstract: An image capturing unit includes a sensor section that images a predetermined range including a subject; a reference chart section that is imaged by the sensor section with the subject; and an illumination light source that illuminates the subject and the reference chart section. The illumination light source is arranged at a position where a mirror reflection region that mirror reflects light entering from the illumination light source to the sensor section is outside a region of the subject and the reference chart section.
    Type: Grant
    Filed: December 29, 2014
    Date of Patent: March 15, 2016
    Assignee: RICOH COMPANY, LIMITED
    Inventors: Suguru Yokozawa, Nobuyuki Satoh, Yasuyuki Suzuki, Masato Kobayashi, Yuichi Sakurada, Mamoru Yorimoto, Tatsuhiko Okada, Daisaku Horikawa, Masahiro Shigemoto, Kazushi Takei, Hideaki Suzuki, Satoshi Iwanami
  • Publication number: 20160031250
    Abstract: A medium identification device identifies a type of a recording medium used for image formation. The medium identification device includes: a two-dimensional image sensor that captures an image of the recording medium; and an identifying unit that obtains a glossiness evaluation value indicating glossiness of the recording medium, a surface roughness evaluation value indicating surface roughness of the recording medium, and a coloring evaluation value indicating coloring of the recording medium, using image data of a specular reflection region reflecting specular reflection light from the recording medium and image data of a diffused reflection region reflecting diffused reflection light from the recording medium, the regions being in the image of the recording medium, and identifies the type of the recording medium by combining determination using the glossiness evaluation value, determination using the surface roughness evaluation value, and determination using the coloring evaluation value.
    Type: Application
    Filed: July 29, 2015
    Publication date: February 4, 2016
    Inventors: Suguru YOKOZAWA, Nobuyuki SATOH, Mamoru YORIMOTO, Kenji MORITA, Masayuki FUJII, Daisaku HORIKAWA
  • Publication number: 20160004202
    Abstract: An imaging device includes: a housing having an opening in a surface thereof facing a subject; a light source that irradiates the subject with light; a two-dimensional image sensor that captures, from inside of the housing through the opening; an image of the subject illuminated by the light source; an optical member that is disposed between the two-dimensional image sensor and the opening and that transmits light reflected off the subject; and a contamination inspection member that is disposed between the opening and the optical member and that causes inspection light for inspecting contamination on the optical member to be incident upon the two-dimensional image sensor via the optical member.
    Type: Application
    Filed: July 1, 2015
    Publication date: January 7, 2016
    Inventors: Kenji MORITA, Nobuyuki SATOH, Mamoru YORIMOTO, Masayuki FUJII, Daisaku HORIKAWA, Suguru YOKOZAWA, Masahiro HIRANUMA, Masaya KAWARADA
  • Publication number: 20150375498
    Abstract: A nozzle testing device includes: a two-dimensional image sensor to capture an image of a pattern formed on a recording object by discharging ink from a nozzle row while moving the nozzle row and the recording object relative to each other in a direction orthogonal to the nozzle row; a light source unit provided such that regularly reflected light by the pattern forms a regular reflection area in the image of the pattern captured by the two-dimensional image sensor; and a detection unit to analyze the image to detect discharge failure of the nozzles. The regular reflection area is formed in the image such that a dimension in a direction corresponding to the direction of relative movement between the nozzle row and the recording object is greater than a dimension in a direction orthogonal to the direction corresponding to the direction of relative movement in the image.
    Type: Application
    Filed: June 29, 2015
    Publication date: December 31, 2015
    Inventors: Daisaku HORIKAWA, Nobuyuki SATOH, Mamoru YORIMOTO, Kenji MORITA, Masayuki FUJII, Suguru YOKOZAWA, Masahiro HIRANUMA, Yuichi SAKURADA, Tomohiro SASA, Masaya KAWARADA
  • Patent number: 9221284
    Abstract: An image forming apparatus includes a recording head in which a plurality of nozzles for discharging liquid droplets; and a pattern forming unit configured to form a test pattern used for positional deviation adjustment including a first pattern serving as a reference pattern and a second pattern serving as an adjustment pattern. The first pattern and the second pattern each are a linear pattern that is parallel to a nozzle arrangement direction and has a disconnected portion. The disconnected portion of the first pattern and the disconnected portion of the second pattern are shifted from each other in the nozzle arrangement direction.
    Type: Grant
    Filed: December 2, 2013
    Date of Patent: December 29, 2015
    Assignee: Ricoh Company, Ltd.
    Inventors: Tatsuhiko Okada, Mamoru Yorimoto, Daisaku Horikawa, Yuichi Sakurada, Makoto Moriwaki
  • Patent number: 9162451
    Abstract: An image forming apparatus which reads a test pattern formed by ejecting liquid droplets onto a recording medium to adjust an ejection timing of the liquid droplets is disclosed. The image forming apparatus includes a reading unit including a light emitting unit and a light receiving unit; a sensitivity adjusting unit; a relative movement unit; a first correction unit which detects a position of the test pattern; a second correction unit which detects the position of the test pattern; and a correction method selecting unit which selects the first correction unit or the second correction unit based on adjusting results of sensitivity adjusted by the sensitivity adjusting unit.
    Type: Grant
    Filed: November 27, 2013
    Date of Patent: October 20, 2015
    Assignee: Ricoh Company, Ltd.
    Inventors: Mamoru Yorimoto, Tatsuhiko Okada, Daisaku Horikawa, Makoto Moriwaki
  • Publication number: 20150248597
    Abstract: An imaging device comprises: a two-dimensional image sensor that includes a plurality of light receiving units capable of reading an output value individually according to a volume of received light thereof; a receiving unit that receives a control signal that specifies an operation mode of the two-dimensional image sensor that is predetermined according to a purpose of using the output value; and a sensor controller that sets, on the basis of the control signal received by the receiving unit, an imaging area representing an area of a light receiving unit that reads the output value from among the light receiving units of the two-dimensional image sensor and controls reading of the output value.
    Type: Application
    Filed: December 9, 2014
    Publication date: September 3, 2015
    Applicant: RICOH COMPANY, LTD.
    Inventors: Hiroshi Matsumoto, Nobuyuki Satoh, Mamoru Yorimoto, Masato Kobayashi, Masayuki Fujii, Satoshi Hirata
  • Patent number: 9118874
    Abstract: An image capturing device includes a sensor unit that captures a predetermined range including a subject; a reference chart that is captured by the sensor unit together with the subject; an illumination light source that illuminates the subject and the reference chart; a lens member including one or more lenses arranged in an optical path of reflected light extending from the subject and the reference chart to the sensor unit; and a lens moving unit that moves at least one lens of the lens member so as to change a position thereof in a direction along the optical path.
    Type: Grant
    Filed: March 13, 2013
    Date of Patent: August 25, 2015
    Assignee: RICOH COMPANY, LIMITED
    Inventors: Hiroshi Matsumoto, Nobuyuki Satoh, Yasuyuki Suzuki, Mamoru Yorimoto, Masato Kobayashi, Yuichi Sakurada, Suguru Yokozawa, Tatsuhiko Okada, Tomokazu Kanzawa, Daisaku Horikawa
  • Patent number: 9070052
    Abstract: An image capturing unit includes a sensor unit that captures a predetermined area including a subject; a reference chart that is arranged in the predetermined area and captured together with the subject by the sensor unit; an optical path length changing member that is arranged on an optical path extending from the subject to the sensor unit and is capable of changing a length of the optical path.
    Type: Grant
    Filed: March 18, 2013
    Date of Patent: June 30, 2015
    Assignee: RICOH COMPANY, LIMITED
    Inventors: Tatsuhiko Okada, Nobuyuki Satoh, Yasuyuki Suzuki, Mamoru Yorimoto, Masato Kobayashi, Yuichi Sakurada, Suguru Yokozawa, Tomokazu Kanzawa, Daisaku Horikawa, Hiroshi Matsumoto
  • Publication number: 20150158309
    Abstract: An image forming apparatus includes a printing unit that prints at least one object image using a color material; a color information acquiring unit that acquires color information of the object image; and a control unit that starts one of colorimetry of the object image using the color information acquired by the color information acquiring unit and color adjustment of the printing unit after a variation amount of color information of the object image measured at different points of time is equal to or smaller than a predetermined threshold.
    Type: Application
    Filed: December 8, 2014
    Publication date: June 11, 2015
    Applicant: RICOH COMPANY, LTD.
    Inventors: Masayuki Fujii, Nobuyuki Satoh, Mamoru Yorimoto, Masato Kobayashi, Hiroshi Matsumoto, Daisaku Horikawa, Suguru Yokozawa, Kenji Morita, Yuichi Sakurada, Tomohiro Sasa, Masaya Kawarada