Patents by Inventor Yuichi Sakurada

Yuichi Sakurada 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).

  • Publication number: 20200247159
    Abstract: A method for determining a working gap includes a first recording step for ejecting ink from a recording head onto a first recording medium to record a test pattern, a first imaging step for capturing the test pattern recorded on the first recording medium in each of a state where a distance between the recording head and the first recording medium is a first distance, and a state where a distance between the recording head and the first recording medium is a second distance, a function calculating step, a second recording step for recording the test pattern on a second recording medium, a second imaging step for capturing the test pattern recorded on the second recording medium, and a working gap determining step for determining, based on the number of pixels of the captured test pattern and a function, a distance between the recording head and the second recording medium.
    Type: Application
    Filed: January 29, 2020
    Publication date: August 6, 2020
    Inventors: Kazuaki SAKURADA, Tetsuo TATSUDA, Yuichi SHIKAGAWA, Mamoru UKITA
  • Patent number: 10674041
    Abstract: An image capturing unit includes a sensor unit that image-captures a predetermined area including a subject; and a reference chart unit that is arranged in the predetermined area and captured with the subject by the sensor unit.
    Type: Grant
    Filed: February 5, 2019
    Date of Patent: June 2, 2020
    Assignee: RICOH COMPANY, LTD.
    Inventors: Nobuyuki Satoh, Yasuyuki Suzuki, Masato Kobayashi, Suguru Yokozawa, Tatsuhiko Okada, Mamoru Yorimoto, Daisaku Horikawa, Yuichi Sakurada
  • Patent number: 10427338
    Abstract: A heating cylinder cover for covering a heating cylinder includes a temperature control mechanism in which at least a plurality of heating units are provided on an outer circumferential surface of a heating cylinder body along an axial direction. The heating cylinder cover includes a heat-retaining cover part that is integrally provided with a cover body part and a plurality of partition parts. The cover body part is attached to the heating cylinder thereby forming a predetermined covered space between the cover body part and the temperature control mechanism and covers at least an upper half part of the heating cylinder. The partition parts project from an inner surface of this cover body part toward the temperature control mechanism and divides the covered space into a plurality of closed spaces.
    Type: Grant
    Filed: July 7, 2017
    Date of Patent: October 1, 2019
    Assignee: NISSEI PLASTIC INDUSTRIAL CO., LTD.
    Inventors: Yuichi Sakurada, Yoshihiko Takahashi, Takahiro Kouda
  • Publication number: 20190174025
    Abstract: An image capturing unit includes a sensor unit that image-captures a predetermined area including a subject; and a reference chart unit that is arranged in the predetermined area and captured with the subject by the sensor unit.
    Type: Application
    Filed: February 5, 2019
    Publication date: June 6, 2019
    Inventors: Nobuyuki SATOH, Yasuyuki SUZUKI, Masato KOBAYASHI, Suguru YOKOZAWA, Tatsuhiko OKADA, Mamoru YORIMOTO, Daisaku HORIKAWA, Yuichi SAKURADA
  • Patent number: 10244147
    Abstract: An image capturing unit includes a sensor unit that image-captures a predetermined area including a subject; and a reference chart unit that is arranged in the predetermined area and captured with the subject by the sensor unit.
    Type: Grant
    Filed: February 8, 2018
    Date of Patent: March 26, 2019
    Assignee: RICOH COMPANY, LTD.
    Inventors: Nobuyuki Satoh, Yasuyuki Suzuki, Masato Kobayashi, Suguru Yokozawa, Tatsuhiko Okada, Mamoru Yorimoto, Daisaku Horikawa, Yuichi Sakurada
  • Patent number: 10158767
    Abstract: An image capturing apparatus includes: a casing having an opening; a light source arranged inside the casing; a sensor arranged inside the casing and configured to capture, through the opening, an image of an object present outside the casing while the light source is on; and a distance calculator to calculate a distance between the casing and the object, based on an image that has been captured by the sensor and contains, within an image region of the object defined by the opening, a high-luminance region and low-luminance regions located more outside than the high-luminance region.
    Type: Grant
    Filed: June 6, 2016
    Date of Patent: December 18, 2018
    Assignee: Ricoh Company, Ltd.
    Inventors: Tomohiro Sasa, Nobuyuki Satoh, Yuichi Sakurada, Kenji Morita, Masaya Kawarada, Daisaku Horikawa
  • Patent number: 10112332
    Abstract: When a heating device is formed which includes at least one or more heaters 4n, 4a, 4b, 4c and 4d that are provided on the outer circumferential surfaces 2f and 3f of at least one of a heating cylinder 2 and an injection nozzle 3 to heat at least one of the heating cylinder 2 and the injection nozzle 3, at least some heaters 4a, 4b, 4c, . . . of all the heaters 4n, 4a, . . . are formed with air cooling-capable heaters 4as, 4bs and 4cs in which a panel member 5 formed of a material R having thermal conductivity is interposed between the heaters 4a, 4b, 4c, . . . and the outer circumferential surfaces 2f and 3f of at least one of the heating cylinder 2 and the injection nozzle 3, in which an air path 6 for air cooling is formed in the panel member 5 and in which an air outlet and inlet portion 8 allowing air A to be passed from an air supply portion 7 is provided in the air path 6.
    Type: Grant
    Filed: October 26, 2015
    Date of Patent: October 30, 2018
    Assignee: NISSEI PLASTIC INDUSTRIAL CO., LTD.
    Inventors: Yuichi Sakurada, Toshimi Kato, Keiichi Tozawa
  • Patent number: 10093087
    Abstract: A distance measuring device includes: an imaging unit that captures a test pattern image including a pair of first markers and a second marker that is formed under a condition different from a condition applied to the first markers; a position detecting unit that detects a position of each of the pair of first markers and the second marker in a captured image captured by the imaging unit; a ratio calculating unit that calculates a ratio of a distance between the pair of the first markers in the captured image and an actual distance between the pair of the first markers; and an actual distance calculating unit that calculates an actual distance between one of the first markers as the pair and the second marker by multiplying a distance between the one of the first markers as the pair and the second marker in the captured image by the ratio.
    Type: Grant
    Filed: September 6, 2017
    Date of Patent: October 9, 2018
    Assignee: Ricoh Company, Ltd.
    Inventors: Masaya Kawarada, Nobuyuki Satoh, Kenji Morita, Yuichi Sakurada, Tomohiro Sasa, Daisaku Horikawa
  • Publication number: 20180167534
    Abstract: An image capturing unit includes a sensor unit that image-captures a predetermined area including a subject; and a reference chart unit that is arranged in the predetermined area and captured with the subject by the sensor unit.
    Type: Application
    Filed: February 8, 2018
    Publication date: June 14, 2018
    Inventors: Nobuyuki SATOH, Yasuyuki SUZUKI, Masato KOBAYASHI, Suguru YOKOZAWA, Tatsuhiko OKADA, Mamoru YORIMOTO, Daisaku HORIKAWA, Yuichi SAKURADA
  • Patent number: 9944103
    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: November 19, 2015
    Date of Patent: April 17, 2018
    Assignee: Ricoh Company, Ltd.
    Inventors: Tatsuhiko Okada, Mamoru Yorimoto, Daisaku Horikawa, Yuichi Sakurada, Makoto Moriwaki
  • Patent number: 9906688
    Abstract: An image capturing unit includes a sensor unit that image-captures a predetermined area including a subject; and a reference chart unit that is arranged in the predetermined area and captured with the subject by the sensor unit.
    Type: Grant
    Filed: October 13, 2016
    Date of Patent: February 27, 2018
    Assignee: RICOH COMPANY, LTD.
    Inventors: Nobuyuki Satoh, Yasuyuki Suzuki, Masato Kobayashi, Suguru Yokozawa, Tatsuhiko Okada, Mamoru Yorimoto, Daisaku Horikawa, Yuichi Sakurada
  • Publication number: 20180009140
    Abstract: In composition of a heating cylinder cover that covers a heating cylinder 2 having a temperature control mechanism 3m in which at least a plurality of heating units 3a, 3b, 3c, . . . are provided on an outer circumferential surface 2ms of a heating cylinder body 2m along an axial direction Fs, the heating cylinder cover includes a heat-retaining cover part 5 that is integrally provided with a cover body part 5m and a plurality of partition parts 5a, 5bc, 5de, . . . ; the cover body part 5m is attached to the heating cylinder 2 thereby forming a predetermined covered space S between the cover body part 5m and the temperature control mechanism 3m and covers at least an upper half part 2u of the heating cylinder 2, and the partition parts 5a, 5bc, 5de, . . . project from an inner surface 5mi of this cover body part 5m toward the temperature control mechanism 3m and divides the covered space S into a plurality of closed spaces Sab, Scd, . . ..
    Type: Application
    Filed: July 7, 2017
    Publication date: January 11, 2018
    Applicant: NISSEI PLASTIC INDUSTRIAL CO., LTD.
    Inventors: Yuichi SAKURADA, Yoshihiko TAKAHASHI, Takahiro KOUDA
  • Publication number: 20170361605
    Abstract: A distance measuring device includes: an imaging unit that captures a test pattern image including a pair of first markers and a second marker that is formed under a condition different from a condition applied to the first markers; a position detecting unit that detects a position of each of the pair of first markers and the second marker in a captured image captured by the imaging unit; a ratio calculating unit that calculates a ratio of a distance between the pair of the first markers in the captured image and an actual distance between the pair of the first markers; and an actual distance calculating unit that calculates an actual distance between one of the first markers as the pair and the second marker by multiplying a distance between the one of the first markers as the pair and the second marker in the captured image by the ratio.
    Type: Application
    Filed: September 6, 2017
    Publication date: December 21, 2017
    Inventors: Masaya Kawarada, Nobuyuki Satoh, Kenji Morita, Yuichi Sakurada, Tomohiro Sasa, Daisaku Horikawa
  • Patent number: 9782967
    Abstract: A distance measuring device includes: an imaging unit that captures a test pattern image including a pair of first markers and a second marker that is formed under a condition different from a condition applied to the first markers; a position detecting unit that detects a position of each of the pair of first markers and the second marker in a captured image captured by the imaging unit; a ratio calculating unit that calculates a ratio of a distance between the pair of the first markers in the captured image and an actual distance between the pair of the first markers; and an actual distance calculating unit that calculates an actual distance between one of the first markers as the pair and the second marker by multiplying a distance between the one of the first markers as the pair and the second marker in the captured image by the ratio.
    Type: Grant
    Filed: May 24, 2016
    Date of Patent: October 10, 2017
    Assignee: Ricoh Company, Ltd.
    Inventors: Masaya Kawarada, Nobuyuki Satoh, Kenji Morita, Yuichi Sakurada, Tomohiro Sasa, Daisaku Horikawa
  • Patent number: 9616604
    Abstract: An injection device has a heating cylinder, a nozzle adaptor attached to an end of the heating cylinder, a nozzle body attached to an end of the nozzle adaptor, a heater for heating the nozzle body, and a thermocouple for measuring a temperature of the nozzle body. The nozzle body has an outer peripheral surface and a key seat formed in the outer peripheral surface and extending in an axial direction of the nozzle body. The thermocouple includes a plate fitted in the key seat of the nozzle body.
    Type: Grant
    Filed: March 30, 2015
    Date of Patent: April 11, 2017
    Assignee: NISSEI PLASTIC INDUSTRIAL CO., LTD.
    Inventors: Yuichi Sakurada, Toshimi Kato
  • Publication number: 20170034397
    Abstract: An image capturing unit includes a sensor unit that image-captures a predetermined area including a subject; and a reference chart unit that is arranged in the predetermined area and captured with the subject by the sensor unit.
    Type: Application
    Filed: October 13, 2016
    Publication date: February 2, 2017
    Inventors: Nobuyuki SATOH, Yasuyuki SUZUKI, Masato KOBAYASHI, Suguru YOKOZAWA, Tatsuhiko OKADA, Mamoru YORIMOTO, Daisaku HORIKAWA, Yuichi SAKURADA
  • Patent number: 9527278
    Abstract: An image forming apparatus includes a recording-head carrier including a recording head for ejecting a liquid droplet onto a recording medium, a relative moving unit configured to relatively move the recording-head carrier and the recording medium; an image recording unit configured to drive the recording head by a driving signal having a driving waveform to eject liquid droplets toward the recording medium while relatively moving the recording-head carrier and the recording medium; a driving-waveform determining unit configured to determine the driving waveform of the driving signal based on a detected temperature near the recording head; a drive-timing determining unit configured to determine drive timing at which the recording head is driven by the driving signal, based on the detected temperature; and a drive control unit configured to set the driving waveform and the drive timing to the image recording unit to drive the recording head.
    Type: Grant
    Filed: November 27, 2013
    Date of Patent: December 27, 2016
    Assignee: Ricoh Company, Ltd.
    Inventors: Yuichi Sakurada, Mamoru Yorimoto, Tatsuhiko Okada, Daisaku Horikawa, Makoto Moriwaki
  • Publication number: 20160366288
    Abstract: An image capturing apparatus includes: a casing having an opening; a light source arranged inside the casing; a sensor arranged inside the casing and configured to capture, through the opening, an image of an object present outside the casing while the light source is on; and a distance calculator to calculate a distance between the casing and the object, based on an image that has been captured by the sensor and contains, within an image region of the object defined by the opening, a high-luminance region and low-luminance regions located more outside than the high-luminance region.
    Type: Application
    Filed: June 6, 2016
    Publication date: December 15, 2016
    Inventors: Tomohiro SASA, Nobuyuki SATOH, Yuichi SAKURADA, Kenji MORITA, Masaya KAWARADA, Daisaku HORIKAWA
  • Patent number: 9516179
    Abstract: An image capturing unit includes a sensor unit that image-captures a predetermined area including a subject; and a reference chart unit that is arranged in the predetermined area and captured with the subject by the sensor unit.
    Type: Grant
    Filed: November 28, 2012
    Date of Patent: December 6, 2016
    Assignee: RICOH COMPANY, LTD.
    Inventors: Nobuyuki Satoh, Yasuyuki Suzuki, Masato Kobayashi, Suguru Yokozawa, Tatsuhiko Okada, Mamoru Yorimoto, Daisaku Horikawa, Yuichi Sakurada
  • Publication number: 20160347052
    Abstract: A distance measuring device includes: an imaging unit that captures a test pattern image including a pair of first markers and a second marker that is formed under a condition different from a condition applied to the first markers; a position detecting unit that detects a position of each of the pair of first markers and the second marker in a captured image captured by the imaging unit; a ratio calculating unit that calculates a ratio of a distance between the pair of the first markers in the captured image and an actual distance between the pair of the first markers; and an actual distance calculating unit that calculates an actual distance between one of the first markers as the pair and the second marker by multiplying a distance between the one of the first markers as the pair and the second marker in the captured image by the ratio.
    Type: Application
    Filed: May 24, 2016
    Publication date: December 1, 2016
    Inventors: Masaya KAWARADA, Nobuyuki SATOH, Kenji MORITA, Yuichi SAKURADA, Tomohiro SASA, Daisaku HORIKAWA