Patents by Inventor Katsuaki Miyawaki

Katsuaki Miyawaki 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: 11066263
    Abstract: A sheet conveying device, which is incorporated in an image forming apparatus, includes a first detector to detect an angle deviation of a recording medium to a sheet conveying direction, a second detector to detect a lateral shift of the recording medium to a width direction, a third detector to detect at least one of the angle deviation and the lateral shift after correction of the angle deviation detected by the first detector and the lateral shift detected by the second detector, and a rotary body to perform a primary movement by (1) rotating in the sheet conveying direction and returning to a reference position and by (2) moving in the width direction and returning to the reference position, and a secondary movement by performing at least one of (1) and (2) after the primary movement.
    Type: Grant
    Filed: June 25, 2019
    Date of Patent: July 20, 2021
    Assignee: Ricoh Company, Ltd.
    Inventors: Jun Yamane, Hiromichi Matsuda, Katsuaki Miyawaki, Koichi Kudo, Tetsuo Watanabe, Toshihiro Okamoto, Hideyuki Takayama, Atsuyuki Oyamada
  • Patent number: 10875728
    Abstract: A sheet conveying device, which is included in an image forming apparatus and a post processing device, includes multiple position detectors and a position corrector. The multiple position detectors are aligned along a sheet conveying direction and configured to detect a side end of a sheet. The position corrector is configured to convey the sheet and correct a position of the sheet based on a positional deviation amount of the sheet, obtained by a detection result of the multiple position detectors. The positional deviation amount of the sheet is obtained by an extreme downstream position detector in the sheet conveying direction, of the multiple position detectors. A position of a subsequent sheet is corrected based on a sum of the positional deviation amount of the sheet and a positional deviation amount of the subsequent sheet.
    Type: Grant
    Filed: June 12, 2019
    Date of Patent: December 29, 2020
    Assignee: RICOH COMPANY, LTD.
    Inventors: Jun Yamane, Hiromichi Matsuda, Tetsuo Watanabe, Katsuaki Miyawaki, Hideyuki Takayama
  • Patent number: 10730713
    Abstract: A sheet conveying device, which is included in an image forming apparatus, includes a sheet holding roller to move while holding a sheet, a detector to perform a primary detection to detect a sheet position before the sheet holding roller holds the sheet and a secondary detection to detect a sheet position downstream from the sheet position detected by the primary detection, and a controller configured to cause the sheet holding roller to perform a first drive to move the sheet holding roller in at least one direction of a width direction of the sheet and a rotation direction in a sheet conveying surface based on a result of the primary detection and a second drive to move the sheet holding roller opposite to the at least one direction of the first drive, based on a result of the secondary detection.
    Type: Grant
    Filed: July 9, 2019
    Date of Patent: August 4, 2020
    Assignee: RICOH COMPANY, LTD.
    Inventors: Hiromichi Matsuda, Katsuaki Miyawaki, Tetsuo Watanabe, Jun Yamane, Hideyuki Takayama
  • Patent number: 10584008
    Abstract: A sheet conveying device, which is included in an image forming apparatus, includes a detector to detect a lateral end face of a sheet, a first pair of rollers to hold and convey the sheet and swing in a direction parallel to a plane of the sheet, a second pair of rollers to convey the sheet together with the first pair of rollers, and a controller to rotate the first pair of rollers to multiple angles, detect time changes at each angle at the lateral end face while conveying the sheet, and determine a home position corresponding to a position where respective rates of the time changes of the sheet at the first and second nip regions are substantially identical to each other or a home position having a least difference of rates of the time changes of the sheet at the first and second nip regions.
    Type: Grant
    Filed: June 5, 2018
    Date of Patent: March 10, 2020
    Assignee: Ricoh Company, Ltd.
    Inventors: Hiromichi Matsuda, Katsuaki Miyawaki, Jun Yamane, Hideyuki Takayama
  • Patent number: 10530950
    Abstract: A sheet conveying device, which is included in an image forming apparatus and a post processing device, includes a position corrector and either one of a rolling body and a contact resistance reducer. The position corrector is configured to convey a sheet and correct a position of the sheet. The rolling body is disposed at least one of an upstream side and a downstream side of a sheet conveyance passage from the position corrector in a sheet conveying direction and is configured to roll in at least a direction intersecting the sheet conveying direction. The contact resistance reducer is configured to reduce contact resistance generated due to contact of the sheet to a neighboring part when the position of the sheet is corrected by the position corrector.
    Type: Grant
    Filed: February 20, 2018
    Date of Patent: January 7, 2020
    Assignee: Ricoh Company, Ltd.
    Inventors: Takeshi Watanabe, Tetsuo Watanabe, Katsuaki Miyawaki, Jun Yamane, Hiromichi Matsuda, Hideyuki Takayama, Daiki Sekita
  • Publication number: 20190330001
    Abstract: A sheet conveying device, which is included in an image forming apparatus, includes a sheet holding roller to move while holding a sheet, a detector to perform a primary detection to detect a sheet position before the sheet holding roller holds the sheet and a secondary detection to detect a sheet position downstream from the sheet position detected by the primary detection, and a controller configured to cause the sheet holding roller to perform a first drive to move the sheet holding roller in at least one direction of a width direction of the sheet and a rotation direction in a sheet conveying surface based on a result of the primary detection and a second drive to move the sheet holding roller opposite to the at least one direction of the first drive, based on a result of the secondary detection.
    Type: Application
    Filed: July 9, 2019
    Publication date: October 31, 2019
    Applicant: Ricoh Company, Ltd.
    Inventors: Hiromichi MATSUDA, Katsuaki MIYAWAKI, Tetsuo WATANABE, Jun YAMANE, Hideyuki TAKAYAMA
  • Publication number: 20190315586
    Abstract: A sheet conveying device, which is incorporated in an image forming apparatus, includes a first detector to detect an angle deviation of a recording medium to a sheet conveying direction, a second detector to detect a lateral shift of the recording medium to a width direction, a third detector to detect at least one of the angle deviation and the lateral shift after correction of the angle deviation detected by the first detector and the lateral shift detected by the second detector, and a rotary body to perform a primary movement by (1) rotating in the sheet conveying direction and returning to a reference position and by (2) moving in the width direction and returning to the reference position, and a secondary movement by performing at least one of (1) and (2) after the primary movement.
    Type: Application
    Filed: June 25, 2019
    Publication date: October 17, 2019
    Applicant: Ricoh Company, Ltd.
    Inventors: Jun YAMANE, Hiromichi MATSUDA, Katsuaki MIYAWAKI, Koichi KUDO, Tetsuo WATANABE, Toshihiro OKAMOTO, Hideyuki TAKAYAMA, Atsuyuki OYAMADA
  • Publication number: 20190291994
    Abstract: A sheet conveying device, which is included in an image forming apparatus and a post processing device, includes multiple position detectors and a position corrector. The multiple position detectors are aligned along a sheet conveying direction and configured to detect a side end of a sheet. The position corrector is configured to convey the sheet and correct a position of the sheet based on a positional deviation amount of the sheet, obtained by a detection result of the multiple position detectors. The positional deviation amount of the sheet is obtained by an extreme downstream position detector in the sheet conveying direction, of the multiple position detectors. A position of a subsequent sheet is corrected based on a sum of the positional deviation amount of the sheet and a positional deviation amount of the subsequent sheet.
    Type: Application
    Filed: June 12, 2019
    Publication date: September 26, 2019
    Applicant: Ricoh Company, Ltd.
    Inventors: JUN YAMANE, Hiromichi MATSUDA, Tetsuo WATANABE, Katsuaki MIYAWAKI, Hideyuki TAKAYAMA
  • Patent number: 10392213
    Abstract: A sheet conveying device, which is included in an image forming apparatus, includes a sheet holding roller to move while holding a sheet, a detector to perform a primary detection to detect a sheet position before the sheet holding roller holds the sheet and a secondary detection to detect a sheet position downstream from the sheet position detected by the primary detection, and a controller configured to cause the sheet holding roller to perform a first drive to move the sheet holding roller in at least one direction of a width direction of the sheet and a rotation direction in a sheet conveying surface based on a result of the primary detection and a second drive to move the sheet holding roller opposite to the at least one direction of the first drive, based on a result of the secondary detection.
    Type: Grant
    Filed: December 6, 2017
    Date of Patent: August 27, 2019
    Assignee: RICOH COMPANY, LTD.
    Inventors: Hiromichi Matsuda, Katsuaki Miyawaki, Tetsuo Watanabe, Jun Yamane, Hideyuki Takayama
  • Patent number: 10358309
    Abstract: A sheet conveying device, which is included in an image forming apparatus and a post processing device, includes multiple position detectors and a position corrector. The multiple position detectors are aligned along a sheet conveying direction and configured to detect a side end of a sheet. The position corrector is configured to convey the sheet and correct a position of the sheet based on a positional deviation amount of the sheet, obtained by a detection result of the multiple position detectors. The positional deviation amount of the sheet is obtained by an extreme downstream position detector in the sheet conveying direction, of the multiple position detectors. A position of a subsequent sheet is corrected based on a sum of the positional deviation amount of the sheet and a positional deviation amount of the subsequent sheet.
    Type: Grant
    Filed: March 20, 2018
    Date of Patent: July 23, 2019
    Assignee: RICOH COMPANY, LTD.
    Inventors: Jun Yamane, Hiromichi Matsuda, Tetsuo Watanabe, Katsuaki Miyawaki, Hideyuki Takayama
  • Patent number: 10358311
    Abstract: A sheet conveying device, which is incorporated in an image forming apparatus, includes a first detector to detect an angle deviation of a recording medium to a sheet conveying direction, a second detector to detect a lateral shift of the recording medium to a width direction, a third detector to detect at least one of the angle deviation and the lateral shift after correction of the angle deviation detected by the first detector and the lateral shift detected by the second detector, and a rotary body to perform a primary movement by (1) rotating in the sheet conveying direction and returning to a reference position and by (2) moving in the width direction and returning to the reference position, and a secondary movement by performing at least one of (1) and (2) after the primary movement.
    Type: Grant
    Filed: August 21, 2017
    Date of Patent: July 23, 2019
    Assignee: Ricoh Company, Ltd.
    Inventors: Jun Yamane, Hiromichi Matsuda, Katsuaki Miyawaki, Koichi Kudo, Tetsuo Watanabe, Toshihiro Okamoto, Hideyuki Takayama, Atsuyuki Oyamada
  • Patent number: 10323719
    Abstract: A planetary gear mechanism includes a plurality of planetary gears, an outer gear, a sun gear, a carrier, and a stick mount. The outer gear meshes with the plurality of planetary gears. The sun gear is coaxially disposed on the same axis as the outer gear and transmits force to the planetary gears. The carrier rotatably supports the plurality of planetary gears and is rotatably and floatingly supported. The carrier includes a hole through which a stick member penetrates in a direction of axis of rotation of the carrier. The stick member penetrates through the hole and is mounted on the stick mount. The stick mount is disposed opposite the carrier. The outer gear and the sun gear are held such that one of the outer gear and the sun gear does not rotate.
    Type: Grant
    Filed: June 15, 2016
    Date of Patent: June 18, 2019
    Assignee: RICOH COMPANY, LTD.
    Inventors: Hiromichi Matsuda, Katsuaki Miyawaki, Tetsuo Watanabe, Yasuhiro Maehata, Keisuke Shimizu
  • Publication number: 20180362278
    Abstract: A sheet conveying device, which is included in an image forming apparatus, includes a detector to detect a lateral end face of a sheet, a first pair of rollers to hold and convey the sheet and swing in a direction parallel to a plane of the sheet, a second pair of rollers to convey the sheet together with the first pair of rollers, and a controller to rotate the first pair of rollers to multiple angles, detect time changes at each angle at the lateral end face while conveying the sheet, and determine a home position corresponding to a position where respective rates of the time changes of the sheet at the first and second nip regions are substantially identical to each other or a home position having a least difference of rates of the time changes of the sheet at the first and second nip regions.
    Type: Application
    Filed: June 5, 2018
    Publication date: December 20, 2018
    Applicant: Ricoh Company, Ltd.
    Inventors: Hiromichi MATSUDA, Katsuaki MIYAWAKI, Jun YAMANE, Hideyuki TAKAYAMA
  • Patent number: 10104252
    Abstract: An image reading device, which is included in an image forming apparatus and used to perform a method of reading images, includes an image reading body configured to read one of a recording medium and the recording medium together with a background area adjacent to the recording medium, a moving body disposed facing the image reading body, and a reference body as a reference in shading correction. The moving body is configured to hold the recording medium and the reference body in a direction intersecting a sheet conveying direction of the recording medium such that the recording medium and the reference body contact to and separate from the image reading body.
    Type: Grant
    Filed: November 21, 2016
    Date of Patent: October 16, 2018
    Assignee: Ricoh Company, Ltd.
    Inventors: Tetsuo Watanabe, Hideyuki Takayama, Katsuaki Miyawaki, Hiromichi Matsuda, Atsuyuki Oyamada, Jun Yamane, Takashi Hashimoto
  • Publication number: 20180273323
    Abstract: A sheet conveying device, which is included in an image forming apparatus and a post processing device, includes multiple position detectors and a position corrector. The multiple position detectors are aligned along a sheet conveying direction and configured to detect a side end of a sheet. The position corrector is configured to convey the sheet and correct a position of the sheet based on a positional deviation amount of the sheet, obtained by a detection result of the multiple position detectors. The positional deviation amount of the sheet is obtained by an extreme downstream position detector in the sheet conveying direction, of the multiple position detectors. A position of a subsequent sheet is corrected based on a sum of the positional deviation amount of the sheet and a positional deviation amount of the subsequent sheet.
    Type: Application
    Filed: March 20, 2018
    Publication date: September 27, 2018
    Applicant: Ricoh Company, Ltd.
    Inventors: Jun YAMANE, Hiromichi MATSUDA, Tetsuo WATANABE, Katsuaki MIYAWAKI, Hideyuki TAKAYAMA
  • Publication number: 20180241896
    Abstract: A sheet conveying device, which is included in an image forming apparatus and a post processing device, includes a position corrector and either one of a rolling body and a contact resistance reducer. The position corrector is configured to convey a sheet and correct a position of the sheet. The rolling body is disposed at least one of an upstream side and a downstream side of a sheet conveyance passage from the position corrector in a sheet conveying direction and is configured to roll in at least a direction intersecting the sheet conveying direction. The contact resistance reducer is configured to reduce contact resistance generated due to contact of the sheet to a neighboring part when the position of the sheet is corrected by the position corrector.
    Type: Application
    Filed: February 20, 2018
    Publication date: August 23, 2018
    Applicant: Ricoh Company, Ltd.
    Inventors: Takeshi WATANABE, Tetsuo WATANABE, Katsuaki MIYAWAKI, Jun YAMANE, Hiromichi MATSUDA, Hideyuki TAKAYAMA, Daiki SEKITA
  • Publication number: 20180162667
    Abstract: A sheet conveying device, which is included in an image forming apparatus, includes a sheet holding roller to move while holding a sheet, a detector to perform a primary detection to detect a sheet position before the sheet holding roller holds the sheet and a secondary detection to detect a sheet position downstream from the sheet position detected by the primary detection, and a controller configured to cause the sheet holding roller to perform a first drive to move the sheet holding roller in at least one direction of a width direction of the sheet and a rotation direction in a sheet conveying surface based on a result of the primary detection and a second drive to move the sheet holding roller opposite to the at least one direction of the first drive, based on a result of the secondary detection.
    Type: Application
    Filed: December 6, 2017
    Publication date: June 14, 2018
    Applicant: Ricoh Company, Ltd.
    Inventors: Hiromichi MATSUDA, Katsuaki MIYAWAKI, Tetsuo WATANABE, Jun YAMANE, Hideyuki TAKAYAMA
  • Publication number: 20170341892
    Abstract: A sheet conveying device, which is incorporated in an image forming apparatus, includes a first detector to detect an angle deviation of a recording medium to a sheet conveying direction, a second detector to detect a lateral shift of the recording medium to a width direction, a third detector to detect at least one of the angle deviation and the lateral shift after correction of the angle deviation detected by the first detector and the lateral shift detected by the second detector, and a rotary body to perform a primary movement by (1) rotating in the sheet conveying direction and returning to a reference position and by (2) moving in the width direction and returning to the reference position, and a secondary movement by performing at least one of (1) and (2) after the primary movement.
    Type: Application
    Filed: August 21, 2017
    Publication date: November 30, 2017
    Applicant: Ricoh Company, Ltd.
    Inventors: Jun Yamane, Hiromichi Matsuda, Katsuaki Miyawaki, Koichi Kudo, Tetsuo Watanabe, Toshihiro Okamoto, Hideyuki Takayama, Atsuyuki Oyamada
  • Patent number: 9776819
    Abstract: A sheet conveying device, which is incorporated in an image forming apparatus, includes a first detector to detect an angle deviation of a recording medium to a sheet conveying direction, a second detector to detect a lateral shift of the recording medium to a width direction, a third detector to detect at least one of the angle deviation and the lateral shift after correction of the angle deviation detected by the first detector and the lateral shift detected by the second detector, and a rotary body to perform a primary movement by (1) rotating in the sheet conveying direction and returning to a reference position and by (2) moving in the width direction and returning to the reference position, and a secondary movement by performing at least one of (1) and (2) after the primary movement.
    Type: Grant
    Filed: December 4, 2015
    Date of Patent: October 3, 2017
    Assignee: Ricoh Company, Ltd.
    Inventors: Jun Yamane, Hiromichi Matsuda, Katsuaki Miyawaki, Koichi Kudo, Tetsuo Watanabe, Toshihiro Okamoto, Hideyuki Takayama, Atsuyuki Oyamada
  • Publication number: 20170149989
    Abstract: An image reading device, which is included in an image forming apparatus and used to perform a method of reading images, includes an image reading body configured to read one of a recording medium and the recording medium together with a background area adjacent to the recording medium, a moving body disposed facing the image reading body, and a reference body as a reference in shading correction. The moving body is configured to hold the recording medium and the reference body in a direction intersecting a sheet conveying direction of the recording medium such that the recording medium and the reference body contact to and separate from the image reading body.
    Type: Application
    Filed: November 21, 2016
    Publication date: May 25, 2017
    Applicant: Ricoh Company, Ltd.
    Inventors: Tetsuo WATANABE, Hideyuki Takayama, Katsuaki Miyawaki, Hiromichi Matsuda, Atsuyuki Oyamada, Jun Yamane, Takashi Hashimoto