Patents by Inventor Takuji Kawai

Takuji Kawai 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: 10530947
    Abstract: An image reading device includes an image reader movable along an image reading face, a casing to house the image reader, including a restraint holder, and a restraint to be held by the restraint holder of the casing and configured to restrict movement of the image reader. The restraint includes an operation portion to be disposed outside the casing. The operation portion is operated to move the restraint, in the restraint holder, to: a restricting position to restrict movement of the image reader; a first unlock position to cancel restriction of movement of the image reader; and a second unlock position at which movement of the image reader is not restricted. At the first unlock position, movement of the restraint to the restricting position is allowed. From the second unlock position, movement to the restricting position is less smooth than movement from the first unlock position to the restricting position.
    Type: Grant
    Filed: February 8, 2019
    Date of Patent: January 7, 2020
    Assignee: RICOH COMPANY, LTD.
    Inventors: Takuji Kawai, Yoshiaki Nagao, Yohei Osanai
  • 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
  • Publication number: 20190260892
    Abstract: An image reading device includes an image reader movable along an image reading face, a casing to house the image reader, including a restraint holder, and a restraint to be held by the restraint holder of the casing and configured to restrict movement of the image reader. The restraint includes an operation portion to be disposed outside the casing. The operation portion is operated to move the restraint, in the restraint holder, to: a restricting position to restrict movement of the image reader; a first unlock position to cancel restriction of movement of the image reader; and a second unlock position at which movement of the image reader is not restricted. At the first unlock position, movement of the restraint to the restricting position is allowed. From the second unlock position, movement to the restricting position is less smooth than movement from the first unlock position to the restricting position.
    Type: Application
    Filed: February 8, 2019
    Publication date: August 22, 2019
    Applicant: Ricoh Company, Ltd.
    Inventors: Takuji KAWAI, Yoshiaki Nagao, Yohei Osanai
  • 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
  • Patent number: 10108128
    Abstract: An automatic document feeder, which is included in an image reading device and an image forming apparatus, includes first and second document trays, a document output tray, a document conveying passage, multiple document conveying bodies, a drive source, a detector, and a controller. The multiple document conveying bodies include a document holding and conveying body to convey and hold the original document sheet on the second document tray. On detection of the original document sheet on the second document tray while conveying a different original document sheet from the first document tray, the controller stops feeding the different original document sheet, causes the different original document sheet downstream from the document holding and conveying body in a document conveying direction to be conveyed to the document output tray, and stops the drive source after the different original document has been conveyed to the document output tray.
    Type: Grant
    Filed: April 17, 2017
    Date of Patent: October 23, 2018
    Assignee: Ricoh Company, Ltd.
    Inventors: Tatsuaki Nagano, Yasunobu Youda, Satoshi Narai, Yohei Osanai, Toshiyuki Horikawa, Masatoshi Ishida, Takuji Kawai
  • 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
  • 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
  • Patent number: 9988223
    Abstract: An automatic document feeding device includes a document tray, an ejection tray, and a document takeout port. The document tray is rotatably attached to a rotation fulcrum provided in a body of the automatic document feeder, to load a document. The document tray includes a first positioner and a second positioner. The first positioner is disposed at a front side of the body in a direction perpendicular to a document feed direction. The second positioner is disposed at a depth side of the body in the direction perpendicular to the document feed direction. The first positioner is disposed upstream from the rotation fulcrum in the document feed direction and above the document takeout port in the body. An upper portion and side surfaces of the first positioner in the direction perpendicular to the document feed direction are surrounded by the document tray in a closed state of the document tray.
    Type: Grant
    Filed: June 21, 2016
    Date of Patent: June 5, 2018
    Assignee: RICOH COMPANY, LTD.
    Inventors: Munekazu Hirata, Takayuki Andoh, Koji Hatayama, Kaoru Tada, Tatsuaki Nagano, Yasunobu Youda, Toshiyuki Horikawa, Yohei Osanai, Kazushige Kawamura, Takuji Kawai
  • Publication number: 20170351209
    Abstract: An automatic document feeder, which is included in an image reading device and an image forming apparatus, includes first and second document trays, a document output tray, a document conveying passage, multiple document conveying bodies, a drive source, a detector, and a controller. The multiple document conveying bodies include a document holding and conveying body to convey and hold the original document sheet on the second document tray. On detection of the original document sheet on the second document tray while conveying a different original document sheet from the first document tray, the controller stops feeding the different original document sheet, causes the different original document sheet downstream from the document holding and conveying body in a document conveying direction to be conveyed to the document output tray, and stops the drive source after the different original document has been conveyed to the document output tray.
    Type: Application
    Filed: April 17, 2017
    Publication date: December 7, 2017
    Applicant: Ricoh Company, Ltd.
    Inventors: Tatsuaki NAGANO, Yasunobu Youda, Satoshi Narai, Yobei Osanai, Toshiyuki Horikawa, Masatoshi Ishida, Takuji Kawai
  • 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: 9819838
    Abstract: An automatic document feeding device includes a conveyance unit, an image reading unit, a color reference member, a moving assembly, and a drive source. The drive source includes a rotation output shaft to drive the conveyance unit and the moving assembly. The drive source changes the rotation output shaft from a forward rotation direction to a reverse rotation direction to reversely rotate the rotation output shaft to a set reverse rotation angle set in advance, according to a condition of conveyance of the document. In a rotation transmission route from the rotation output shaft to the moving assembly, the movement regulator is disposed in a first reverse rotation drive region from when a rotation direction of the rotation output shaft is changed to the reverse rotation direction to when a rotation angle of the rotation output shaft after the change in the reverse rotation direction reaches the set reverse rotation angle.
    Type: Grant
    Filed: June 2, 2016
    Date of Patent: November 14, 2017
    Assignee: RICOH COMPANY, LTD.
    Inventors: Koji Hatayama, Takayuki Andoh, Tatsuaki Nagano, Kaoru Tada, Munekazu Hirata, Kazushige Kawamura, Toshiyuki Horikawa, Takuji Kawai, Yohei Osanai, Yasunobu Youda
  • 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: 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
  • 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: 20170134598
    Abstract: An image forming apparatus includes a housing, an image forming device, an image reading device coupled with the housing via a first hinge and switchable between an overlapping state and a standing state, the image reading device configured to read an image on an original document, an automatic document feeder coupled with the image reading device via a second hinge and switchable between an overlapping state overlapping the image reading device and a standing state standing at the image reading device, the automatic document feeder configured to turn the original document and convey the original document to an image position, and an automatic coupling device to couple the automatic document feeder and the image reading device when the image reading device is opened while the automatic document feeder is overlapped on the image reading device.
    Type: Application
    Filed: November 9, 2016
    Publication date: May 11, 2017
    Applicant: Ricoh Company, Ltd.
    Inventors: Tatsuaki NAGANO, Yasunobu YOUDA, Yohei OSANAI, Satoshi NARAI, Toshiyuki HORIKAWA, Takuji KAWAI, Daisuke IMAKI, Takayuki ANDOH, Susumu MIYAZAKI, Yuki FUJII, Koichi ONO, Takeshi SHIKAMA, Hiroaki IKEDA, Shingo SHIRAMURA, Hideo TANAKA, Tetsuo INUI
  • Patent number: 9571690
    Abstract: An image scanner, which is incorporated in an image forming apparatus, includes a stationary-document reading section, a moving-document reading section disposed at an angle to the stationary-document reading section, a reader movable between the stationary-document reading section and the moving-document reading section, and a reading element movable to different angles while contacting the stationary-document reading section and the moving-document reading section to selectively read a document placed on the stationary-document reading section and a document moving over the moving-document reading section. The image scanner further includes any one of position detector, a combination of a moving device and at least one position sensor, and a combination of at least one pressing member, a framework, and an angle changer.
    Type: Grant
    Filed: March 11, 2016
    Date of Patent: February 14, 2017
    Assignee: RICOH COMPANY, LTD.
    Inventors: Yohei Osanai, Yasunobu Youda, Tatsuaki Nagano, Takayuki Andoh, Kaoru Tada, Munekazu Hirata, Toshiyuki Horikawa, Kazushige Kawamura, Takuji Kawai, Koji Hatayama
  • Publication number: 20160368728
    Abstract: An automatic document feeding device includes a document tray, an ejection tray, and a document takeout port. The document tray is rotatably attached to a rotation fulcrum provided in a body of the automatic document feeder, to load a document. The document tray includes a first positioner and a second positioner. The first positioner is disposed at a front side of the body in a direction perpendicular to a document feed direction. The second positioner is disposed at a depth side of the body in the direction perpendicular to the document feed direction. The first positioner is disposed upstream from the rotation fulcrum in the document feed direction and above the document takeout port in the body. An upper portion and side surfaces of the first positioner in the direction perpendicular to the document feed direction are surrounded by the document tray in a closed state of the document tray.
    Type: Application
    Filed: June 21, 2016
    Publication date: December 22, 2016
    Applicant: Ricoh Company, Ltd.
    Inventors: Munekazu HIRATA, Takayuki ANDOH, Koji HATAYAMA, Kaoru TADA, Tatsuaki NAGANO, Yasunobu YOUDA, Toshiyuki HORIKAWA, Yohei OSANAI, Kazushige KAWAMURA, Takuji KAWAI
  • Publication number: 20160360073
    Abstract: An automatic document feeding device includes a conveyance unit, an image reading unit, a color reference member, a moving assembly, and a drive source. The conveyance unit conveys a document to an image reading position. The image reading unit reads an image of the document. The color reference member faces the image reading unit and includes a white reference face to correct shading. The moving assembly relatively moves the image reading unit and the color reference member. The movement regulator regulates a relative movement of the image reading unit and the color reference member by the moving assembly. The drive source includes a common rotation output shaft to drive the conveyance unit and the moving assembly. The drive source changes the rotation output shaft from a forward rotation direction to a reverse rotation direction to reversely rotate the rotation output shaft to a set reverse rotation angle set in advance, according to a condition of conveyance of the document by the conveyance unit.
    Type: Application
    Filed: June 2, 2016
    Publication date: December 8, 2016
    Applicant: Ricoh Company, Ltd.
    Inventors: Koji HATAYAMA, Takayuki ANDOH, Tatsuaki NAGANO, Kaoru TADA, Munekazu HIRATA, Kazushige KAWAMURA, Toshiyuki HORIKAWA, Takuji KAWAI, Yohei OSANAI, Yasunobu YOUDA