Patents by Inventor Daisuke Imaki

Daisuke Imaki 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: 10507995
    Abstract: A sheet conveying device includes a separator to separate a sheet from sheets. The separator includes a separation conveyor; a separation resistance member to press against the separation conveyor via the sheet; a resistance-member holder; a biasing member to contact and bias the resistance-member holder to press the separation resistance member toward the separation conveyor, the resistance-member holder to rotate about a resistance-member rotary shaft to separate from the biasing member in detaching from an apparatus body; and a biasing-member holder configured to rotate about a biasing-member rotary shaft to more incline the biasing member in a state, in which the biasing member is spaced apart from the resistance-member holder, in a moving direction of the resistance-member holder to detach from the apparatus body than the biasing member in a biasing state in which the biasing member biases the resistance-member holder in contact with the resistance-member holder.
    Type: Grant
    Filed: August 10, 2018
    Date of Patent: December 17, 2019
    Assignee: RICOH COMPANY, LTD.
    Inventors: Munekazu Hirata, Satoshi Narai, Yasunobu Youda, Tatsuaki Nagano, Takayuki Andoh, Daisuke Imaki, Tomoya Fujii, Toshiyuki Horikawa, Koji Hatayama, Kaoru Tada, Naoto Kitamura
  • Patent number: 10491768
    Abstract: An image reading device includes a plurality of conveyance rollers to convey a sheet, a motor to drive the plurality of conveyance rollers, an image reading unit to read an image of the sheet, a control device to perform a stop control that stops the sheet in a course of a conveyance path, and a clutch to transmit a driving force of the motor. A first conveyance roller group includes at least one of the plurality of conveyance rollers upstream from a leading end of the sheet stopped by the stop control in a conveyance direction, to which the driving force is transmitted via the clutch. A second conveyance roller group includes at least one of the plurality of conveyance rollers downstream from the leading end of the sheet stopped by the stop control in the conveyance direction, to which the driving force is transmitted without the clutch.
    Type: Grant
    Filed: August 21, 2018
    Date of Patent: November 26, 2019
    Assignee: Ricoh Company, Ltd.
    Inventors: Takayuki Andoh, Yasunobu Youda, Tatsuaki Nagano, Daisuke Imaki, Satoshi Narai, Tomoya Fujii, Toshiyuki Horikawa, Koji Hatayama, Kaoru Tada, Munekazu Hirata, Naoto Kitamura
  • Patent number: 10409192
    Abstract: An optical scanner includes a light source including a plurality of light emitting elements, a polygon mirror which deflects light from the light source for scanning a surface of a subject, an optical element arranged between the light source and the polygon mirror, having optical power in a sub scanning direction, a synchronous detector which detects the light deflected by the polygon mirror for synchronous detection and generates a signal for controlling a timing at which the scanning of the surface is started, and a fixing element which secures one end of the optical element. The light emitting elements of the light source are aligned with a certain tilt angle relative to the sub scanning direction. Light from one of the light emitting elements disposed closest to the fixing element in a main scanning direction is used for synchronous detection.
    Type: Grant
    Filed: November 7, 2017
    Date of Patent: September 10, 2019
    Assignee: RICOH COMPANY, LTD.
    Inventors: Tomoya Fujii, Tadashi Nakamura, Nobuyuki Arai, Yoshinobu Sakaue, Noboru Kusunose, Daisuke Imaki
  • Patent number: 10412246
    Abstract: An image-reading unit includes an original document conveyor that includes a first original document tray to hold an original document to be read, a first original document feeding port to feed the original document placed on the first original document tray, and an original document conveying path to convey the original document from the first original document feeding port to an original document discharging port. The original document conveyor further includes an openable second original document tray attached near an intermediate portion of the original document conveying path to hold an original document when opened, and a second original document feeding port to feed the original document on the second original document tray. The image-reading unit further includes an image reader to read an image of the original document being conveyed along the original document conveying path.
    Type: Grant
    Filed: June 14, 2018
    Date of Patent: September 10, 2019
    Assignee: Ricoh Company, Ltd.
    Inventors: Takuji Kawai, Yasunobu Youda, Yohei Osanai, Tatsuaki Nagano, Satoshi Narai, Toshiyuki Horikawa, Daisuke Imaki, Takayuki Andoh, Susumu Miyazaki, Tetsuo Inui, Yuki Fujii, Koichi Ono, Takeshi Shikama, Shingo Shiramura, Hideo Tanaka
  • Patent number: 10341516
    Abstract: A rotation drive device includes a driven rotation member, a driving rotation member, a rotation relay member, a shaft, and a holder. The rotation relay member transmits only a unidirectional rotational driving force from the driving rotation member to the driven rotation member. The rotation relay member includes a housing and a cylindrical one-way clutch. A contact portion between the driving rotation member and the shaft is configured to rotate the driving rotation member and the shaft to transmit the driving force to an inner peripheral side of the cylindrical one-way clutch via the shaft. The driving rotation member includes a boss projected toward the holder and rotatably held in the holder. A portion of the shaft to support the driving rotation member and an inner wall surface of a through hole of the driving rotation member are shaped to rotate the shaft and the driving rotation member. together.
    Type: Grant
    Filed: March 13, 2018
    Date of Patent: July 2, 2019
    Assignee: RICOH COMPANY, LTD.
    Inventors: Daisuke Imaki, Yohei Osanai, Genta Hagiwara, Masatoshi Ishida, Tatsuaki Nagano, Satoshi Narai, Toshiyuki Horikawa, Yasunobu Youda, Takayuki Andoh, Kaoru Tada
  • Publication number: 20190068815
    Abstract: An image reading device includes a plurality of conveyance rollers to convey a sheet, a motor to drive the plurality of conveyance rollers, an image reading unit to read an image of the sheet, a control device to perform a stop control that stops the sheet in a course of a conveyance path, and a clutch to transmit a driving force of the motor. A first conveyance roller group includes at least one of the plurality of conveyance rollers upstream from a leading end of the sheet stopped by the stop control in a conveyance direction, to which the driving force is transmitted via the clutch. A second conveyance roller group includes at least one of the plurality of conveyance rollers downstream from the leading end of the sheet stopped by the stop control in the conveyance direction, to which the driving force is transmitted without the clutch.
    Type: Application
    Filed: August 21, 2018
    Publication date: February 28, 2019
    Applicant: Ricoh Company, Ltd.
    Inventors: Takayuki ANDOH, Yasunobu YOUDA, Tatsuaki NAGANO, Daisuke IMAKI, Satoshi NARAI, Tomoya FUJII, Toshiyuki HORIKAWA, Koji HATAYAMA, Kaoru TADA, Munekazu HIRATA, Naoto KITAMURA
  • Publication number: 20190047809
    Abstract: A sheet conveying device includes a separator to separate a sheet from sheets. The separator includes a separation conveyor; a separation resistance member to press against the separation conveyor via the sheet; a resistance-member holder; a biasing member to contact and bias the resistance-member holder to press the separation resistance member toward the separation conveyor, the resistance-member holder to rotate about a resistance-member rotary shaft to separate from the biasing member in detaching from an apparatus body; and a biasing-member holder configured to rotate about a biasing-member rotary shaft to more incline the biasing member in a state, in which the biasing member is spaced apart from the resistance-member holder, in a moving direction of the resistance-member holder to detach from the apparatus body than the biasing member in a biasing state in which the biasing member biases the resistance-member holder in contact with the resistance-member holder.
    Type: Application
    Filed: August 10, 2018
    Publication date: February 14, 2019
    Applicant: Ricoh Company, Ltd.
    Inventors: Munekazu HIRATA, Satoshi NARAI, Yasunobu YOUDA, Tatsuaki NAGANO, Takayuki ANDOH, Daisuke IMAKI, Tomoya FUJII, Toshiyuki HORIKAWA, Koji HATAYAMA, Kaoru TADA, Naoto KITAMURA
  • Publication number: 20190052767
    Abstract: A reading device includes a feeder, a reading unit, and circuitry. The feeder feeds a document. The reading unit reads the document fed by the feeder. The circuitry acquires image data of the document read by the reading unit, in a mode selected in accordance with a predetermined selection condition from a plurality of modes that includes a first mode for acquiring image data including a document area of the document and an outside area other than the document area and a second mode for acquiring image data of an area not including the outside area.
    Type: Application
    Filed: August 6, 2018
    Publication date: February 14, 2019
    Inventors: Tatsuaki NAGANO, Koji HATAYAMA, Satoshi NARAI, Daisuke IMAKI, Toshiyuki HORIKAWA, Kaoru TADA, Takayuki ANDOH, Yohei OSANAI, Genta HAGIWARA, Yasunobu YOUDA
  • Patent number: 10200564
    Abstract: An image reading device includes: a reading unit; a first detecting unit that detects a position of the reading unit in the sub-scanning direction; a second detecting unit that detects a position of the reading unit in the sub-scanning direction; and a calculating unit that calculates a skew quantity and a skew direction of the reading unit, based on a difference, introduced by the skew, between a travel distance by which the reading unit has travelled from a measurement reference position located on an upstream side of the first detecting unit and the second detecting unit in a moving direction to a point where the reading unit is detected by the first detecting unit, and a travel distance by which the reading unit has travelled from the measurement reference position to a point where the reading unit is detected by the second detecting unit.
    Type: Grant
    Filed: January 4, 2017
    Date of Patent: February 5, 2019
    Assignee: RICOH COMPANY, LTD.
    Inventors: Yuki Fujii, Yasunobu Youda, Yohei Osanai, Tatsuaki Nagano, Satoshi Narai, Toshiyuki Horikawa, Takuji Kawai, Daisuke Imaki, Takayuki Andoh, Susumu Miyazaki, Tetsuo Inui, Koichi Ono, Takeshi Shikama, Shingo Shiramura, Hideo Tanaka
  • Publication number: 20180295247
    Abstract: An image-reading unit includes an original document conveyor that includes a first original document tray to hold an original document to be read, a first original document feeding port to feed the original document placed on the first original document tray, and an original document conveying path to convey the original document from the first original document feeding port to an original document discharging port. The original document conveyor further includes an openable second original document tray attached near an intermediate portion of the original document conveying path to hold an original document when opened, and a second original document feeding port to feed the original document on the second original document tray. The image-reading unit further includes an image reader to read an image of the original document being conveyed along the original document conveying path.
    Type: Application
    Filed: June 14, 2018
    Publication date: October 11, 2018
    Applicant: Ricoh Company, Ltd.
    Inventors: Takuji KAWAI, Yasunobu YOUDA, Yohei OSANAI, Tatsuaki NAGANO, Satoshi NARAI, Toshiyuki HORIKAWA, Daisuke IMAKI, Takayuki ANDOH, Susumu MIYAZAKI, Tetsuo INUI, Yuki FUJII, Koichi ONO, Takeshi SHIKAMA, Shingo SHIRAMURA, Hideo TANAKA
  • Publication number: 20180270375
    Abstract: A rotation drive device includes a driven rotation member, a driving rotation member, a rotation relay member, a shaft, and a holder. The rotation relay member transmits only a unidirectional rotational driving force from the driving rotation member to the driven rotation member. The rotation relay member includes a housing and a cylindrical one-way clutch. A contact portion between the driving rotation member and the shaft is configured to rotate the driving rotation member and the shaft to transmit the driving force to an inner peripheral side of the cylindrical one-way clutch via the shaft. The driving rotation member includes a boss projected toward the holder and rotatably held in the holder. A portion of the shaft to support the driving rotation member and an inner wall surface of a through hole of the driving rotation member are shaped to rotate the shaft and the driving rotation member. together.
    Type: Application
    Filed: March 13, 2018
    Publication date: September 20, 2018
    Applicant: Ricoh Company, Ltd.
    Inventors: DAISUKE IMAKI, Yohei OSANAI, Genta HAGIWARA, Masatoshi ISHIDA, Tatsuaki NAGANO, Satoshi NARAI, Toshiyuki HORIKAWA, Yasunobu YOUDA, Takayuki ANDOH, Kaoru TADA
  • Patent number: 10044898
    Abstract: An image reading device, which is included in an image forming apparatus, includes a first transparent body, a second transparent body, a holding body, and a reading body. The second transparent body is disposed separated from and inclined at a predetermined angle to the first transparent body. The holding body holds the first and second transparent bodies. The reading body moves in a sub-scanning direction along the first and second transparent bodies. The holding body includes a flat face and a frame-shaped face. The flat face is contiguous to the first transparent body on a same plane and smoothly connected with the second transparent body. The frame-shaped face projects outwardly beyond the second transparent body facing the reading body. The reading body moves and contacts the first transparent body and the holding body, and moves with a gap relative to the second transparent body.
    Type: Grant
    Filed: March 17, 2017
    Date of Patent: August 7, 2018
    Assignee: Ricoh Company, Ltd.
    Inventors: Yohei Osanai, Yasunobu Youda, Masatoshi Ishida, Tatsuaki Nagano, Daisuke Imaki, Satoshi Narai, Toshiyuki Horikawa, Takuji Kawai
  • Patent number: 10027831
    Abstract: An image-reading unit includes an original document conveyor that includes a first original document tray to hold an original document to be read, a first original document feeding port to feed the original document placed on the first original document tray, and an original document conveying path to convey the original document from the first original document feeding port to an original document discharging port. The original document conveyor further includes an openable second original document tray attached near an intermediate portion of the original document conveying path to hold an original document when opened, and a second original document feeding port to feed the original document on the second original document tray. The image-reading unit further includes an image reader to read an image of the original document being conveyed along the original document conveying path.
    Type: Grant
    Filed: November 10, 2016
    Date of Patent: July 17, 2018
    Assignee: Ricoh Company, Ltd.
    Inventors: Takuji Kawai, Yasunobu Youda, Yohei Osanai, Tatsuaki Nagano, Satoshi Narai, Toshiyuki Horikawa, Daisuke Imaki, Takayuki Andoh, Susumu Miyazaki, Tetsuo Inui, Yuki Fujii, Koichi Ono, Takeshi Shikama, Shingo Shiramura, Hideo Tanaka
  • Publication number: 20180088485
    Abstract: An optical scanner includes a light source including a plurality of light emitting elements, a polygon mirror which deflects light from the light source for scanning a surface of a subject, an optical element arranged between the light source and the polygon mirror, having optical power in a sub scanning direction, a synchronous detector which detects the light deflected by the polygon mirror for synchronous detection and generates a signal for controlling a timing at which the scanning of the surface is started, and a fixing element which secures one end of the optical element. The light emitting elements of the light source are aligned with a certain tilt angle relative to the sub scanning direction. Light from one of the light emitting elements disposed closest to the fixing element in a main scanning direction is used for synchronous detection.
    Type: Application
    Filed: November 7, 2017
    Publication date: March 29, 2018
    Inventors: TOMOYA FUJII, Tadashi NAKAMURA, Nobuyuki ARAI, Yoshinobu SAKAUE, Noboru KUSUNOSE, Daisuke IMAKI
  • Patent number: 9864296
    Abstract: An optical scanner includes a light source including a plurality of light emitting elements, a polygon mirror which deflects light from the light source for scanning a surface of a subject, an optical element arranged between the light source and the polygon mirror, having optical power in a sub scanning direction, a synchronous detector which detects the light deflected by the polygon mirror for synchronous detection and generates a signal for controlling a timing at which the scanning of the surface is started, and a fixing element which secures one end of the optical element. The light emitting elements of the light source are aligned with a certain tilt angle relative to the sub scanning direction. Light from one of the light emitting elements disposed closest to the fixing element in a main scanning direction is used for synchronous detection.
    Type: Grant
    Filed: March 10, 2015
    Date of Patent: January 9, 2018
    Assignee: RICOH COMPANY, LTD.
    Inventors: Tomoya Fujii, Tadashi Nakamura, Nobuyuki Arai, Yoshinobu Sakaue, Noboru Kusunose, Daisuke Imaki
  • Publication number: 20170331970
    Abstract: An image reading device, which is included in an image forming apparatus, includes a first transparent body, a second transparent body, a holding body, and a reading body. The second transparent body is disposed separated from and inclined at a predetermined angle to the first transparent body. The holding body holds the first and second transparent bodies. The reading body moves in a sub-scanning direction along the first and second transparent bodies. The holding body includes a flat face and a frame-shaped face. The flat face is contiguous to the first transparent body on a same plane and smoothly connected with the second transparent body. The frame-shaped face projects outwardly beyond the second transparent body facing the reading body. The reading body moves and contacts the first transparent body and the holding body, and moves with a gap relative to the second transparent body.
    Type: Application
    Filed: March 17, 2017
    Publication date: November 16, 2017
    Applicant: Ricoh Company, Ltd.
    Inventors: Yohei OSANAI, Yasunobu YOUDA, Masatoshi ISHIDA, Tatsuaki NAGANO, Daisuke IMAKI, Satoshi NARAI, Toshiyuki HORIKAWA, Takuji KAWAI
  • Patent number: 9800748
    Abstract: An automatic document feeder that is included in an image reader of an image forming apparatus includes a sheet conveying roller, a document feeder cover, a projection piece, a motor, a driving side gear, and a driving force transmission device including an idler gear, a driving force release gear, a slide body, a first elastic body to bias the idler gear and the driving force release gear to be separated, a second elastic body to bias the driving force release gear and the slide body to be separated, and a drive shaft. The driving force transmission device meshes the driving and driven side meshing portions together with a biasing force applied by the second elastic body when the document feeder cover is closed, and releases the driving and driven side meshing portions with a biasing force applied by the first elastic body when the document feeder cover is opened.
    Type: Grant
    Filed: November 10, 2016
    Date of Patent: October 24, 2017
    Assignee: RICOH COMPANY LTD.
    Inventors: Toshiyuki Horikawa, Yasunobu Youda, Yohei Osanai, Tatsuaki Nagano, Satoshi Narai, Takuji Kawai, Daisuke Imaki, Takayuki Andoh, Susumu Miyazaki, Yuki Fujii, Koichi Ono, Takeshi Shikama, Hiroaki Ikeda, Shingo Shiramura, Hideo Tanaka, Tetsuo Inui
  • Publication number: 20170208208
    Abstract: An image reading device includes: a reading unit; a first detecting unit that detects a position of the reading unit in the sub-scanning direction; a second detecting unit that detects a position of the reading unit in the sub-scanning direction; and a calculating unit that calculates a skew quantity and a skew direction of the reading unit, based on a difference, introduced by the skew, between a travel distance by which the reading unit has travelled from a measurement reference position located on an upstream side of the first detecting unit and the second detecting unit in a moving direction to a point where the reading unit is detected by the first detecting unit, and a travel distance by which the reading unit has travelled from the measurement reference position to a point where the reading unit is detected by the second detecting unit.
    Type: Application
    Filed: January 4, 2017
    Publication date: July 20, 2017
    Applicant: Ricoh Company, Ltd.
    Inventors: Yuki FUJII, Yasunobu YOUDA, Yohei OSANAI, Tatsuaki NAGANO, Satoshi NARAI, Toshiyuki HORIKAWA, Takuji KAWAI, Daisuke IMAKI, Takayuki ANDOH, Susumu MIYAZAKI, Tetsuo INUI, Koichi ONO, Takeshi SHIKAMA, Shingo SHIRAMURA, Hideo TANAKA
  • Publication number: 20170142265
    Abstract: An automatic document feeder that is included in an image reader of an image forming apparatus includes a sheet conveying roller, a document feeder cover, a projection piece, a motor, a driving side gear, and a driving force transmission device including an idler gear, a driving force release gear, a slide body, a first elastic body to bias the idler gear and the driving force release gear to be separated, a second elastic body to bias the driving force release gear and the slide body to be separated, and a drive shaft. The driving force transmission device meshes the driving and driven side meshing portions together with a biasing force applied by the second elastic body when the document feeder cover is closed, and releases the driving and driven side meshing portions with a biasing force applied by the first elastic body when the document feeder cover is opened.
    Type: Application
    Filed: November 10, 2016
    Publication date: May 18, 2017
    Applicant: Ricoh Company, Ltd.
    Inventors: Toshiyuki HORIKAWA, Yasunobu YOUDA, Yohei OSANAI, Tatsuaki NAGANO, Satoshi NARAI, Takuji KAWAI, Daisuke IMAKI, Takayuki ANDOH, Susumu MIYAZAKI, Yuki FUJII, Koichi ONO, Takeshi SHIKAMA, Hiroaki IKEDA, Shingo SHIRAMURA, Hideo TANAKA, Tetsuo INUI
  • Publication number: 20170142271
    Abstract: An image-reading unit includes an original document conveyor that includes a first original document tray to hold an original document to be read, a first original document feeding port to feed the original document placed on the first original document tray, and an original document conveying path to convey the original document from the first original document feeding port to an original document discharging port. The original document conveyor further includes an openable second original document tray attached near an intermediate portion of the original document conveying path to hold an original document when opened, and a second original document feeding port to feed the original document on the second original document tray. The image-reading unit further includes an image reader to read an image of the original document being conveyed along the original document conveying path.
    Type: Application
    Filed: November 10, 2016
    Publication date: May 18, 2017
    Applicant: Ricoh Company, Ltd.
    Inventors: Takuji KAWAI, Yasunobu YOUDA, Yohei OSANAI, Tatsuaki NAGANO, Satoshi NARAI, Toshiyuki HORIKAWA, Daisuke IMAKI, Takayuki ANDOH, Susumu MIYAZAKI, Tetsuo INUI, Yuki FUJII, Koichi ONO, Takeshi SHIKAMA, Shingo SHIRAMURA, Hideo TANAKA