Patents by Inventor Shinya Kitaoka

Shinya Kitaoka 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: 9807267
    Abstract: An automatic document feeder includes: a recording-medium set unit, on which a recording medium is set; a recording-medium set detecting unit that detects whether the recording medium is set on the recording-medium set unit; a conveying unit that conveys the recording medium; a sheet-feeding cover section that constitutes part of the conveying unit and that includes an openable and closable sheet feeding cover; and a control unit that separately receives a power-on signal, which is output when a power source of an image forming device including the automatic document feeder is turned on, and an energy-saving return signal, which is output when a return is made from an energy saving state where a power source of part of the device is disconnected. When the power-on signal is received, the control unit performs an initialization operation to initialize each unit of the automatic document feeder.
    Type: Grant
    Filed: December 17, 2015
    Date of Patent: October 31, 2017
    Assignee: Ricoh Company, Limited
    Inventors: Hiroshi Kubo, Norio Kimura, Shinya Kitaoka, Atsushi Kanaya, Yoshito Suzuki
  • Patent number: 9648194
    Abstract: A document reading device including an image reader. The image reader includes a first reader to read a first image from a first face of a document fed by a document feeder and a second reader to read a second face of the document. An operation mode is switchable between a normal operation mode in which the image reader is in an operation enabled state and an energy-saving mode in which the image reader is in an operation stop state. In a return from the energy saving mode to the normal operation mode, the image reader performs a start-up operation including a first initial operation for returning the first reader to the normal operation mode and then performs a second initial operation for returning the second reader to the normal operation mode.
    Type: Grant
    Filed: March 4, 2015
    Date of Patent: May 9, 2017
    Assignee: RICOH COMPANY, LTD.
    Inventors: Norio Kimura, Takashi Fujii, Hiroshi Kubo, Shinya Kitaoka
  • Publication number: 20160198059
    Abstract: An automatic document feeder includes: a recording-medium set unit, on which a recording medium is set; a recording-medium set detecting unit that detects whether the recording medium is set on the recording-medium set unit; a conveying unit that conveys the recording medium; a sheet-feeding cover section that constitutes part of the conveying unit and that includes an openable and closable sheet feeding cover; and a control unit that separately receives a power-on signal, which is output when a power source of an image forming device including the automatic document feeder is turned on, and an energy-saving return signal, which is output when a return is made from an energy saving state where a power source of part of the device is disconnected. When the power-on signal is received, the control unit performs an initialization operation to initialize each unit of the automatic document feeder.
    Type: Application
    Filed: December 17, 2015
    Publication date: July 7, 2016
    Applicant: Ricoh Company, Limited
    Inventors: Hiroshi KUBO, Norio KIMURA, Shinya KITAOKA, Atsushi KANAYA, Yoshito SUZUKI
  • Publication number: 20160170355
    Abstract: An automatic document feeder comprises: a first conveyance portion through which documents from a bundle of documents placed on a paper feeding tray are separated from one another and conveyed to a reading position; a second conveyance portion through which a document having been conveyed to the reading position is ejected onto a paper ejection tray; a detector that detects any one mode from a productivity mode and a silent mode; and a controller that controls, when the detector has detected the productivity mode, the first conveyance portion so as to bring a conveyance speed in the first conveyance portion to a first conveyance speed, and, when the detector has detected the silent mode, controls the first conveyance portion so as to bring a conveyance speed in the first conveyance portion to a second conveyance speed that is slower than the first conveyance speed.
    Type: Application
    Filed: November 23, 2015
    Publication date: June 16, 2016
    Applicant: Ricoh Company, Limited
    Inventors: Fumiyuki HEISHI, Takeshi AKAI, Atsushi KANAYA, Yoshito SUZUKI, Hiroshi KUBO, Shinya KITAOKA, Norio KIMURA
  • Patent number: 9238559
    Abstract: An auto document feeder includes a movable document table on which documents are stacked, a pickup roller that feeds a topmost document among the documents on the movable document table to a feed position via a feed opening, and a shielding member that is arranged on the upstream side of the pickup roller and above the topmost document, and that shields the feed opening. At least an end portion of the shielding member on the document table side is made of a flexible member.
    Type: Grant
    Filed: February 21, 2014
    Date of Patent: January 19, 2016
    Assignee: Ricoh Company, Limited
    Inventors: Takeshi Akai, Shinya Kitaoka, Koki Sakano, Fumiyuki Heishi
  • Patent number: 9219833
    Abstract: An automatic document feeder comprises: a feeding unit that causes an image of a first side of a document to be read by a first image reading unit; a second image reading unit that reads an image of a second side of the document; a release unit that supports a reading guide opposite to a reading surface of the second image reading unit and enables underneath of the reading surface to be released; and a paper ejection tray on which the document having been subjected to image reading and ejected from a paper ejection roller pair is accumulated, wherein an end fence that rises up at a document ejection direction upstream side of the paper ejection tray is configured of separate members that are an upper portion and a lower portion, and a rotational pivot of the release unit is provided downstream from the end fence in a feeding direction.
    Type: Grant
    Filed: March 4, 2015
    Date of Patent: December 22, 2015
    Assignee: RICOH COMPANY, LIMITED
    Inventors: Hiroshi Kubo, Takashi Fujii, Shinya Kitaoka, Norio Kimura
  • Publication number: 20150264194
    Abstract: An automatic document feeder comprises: a feeding unit that causes an image of a first side of a document to be read by a first image reading unit; a second image reading unit that reads an image of a second side of the document; a release unit that supports a reading guide opposite to a reading surface of the second image reading unit and enables underneath of the reading surface to be released; and a paper ejection tray on which the document having been subjected to image reading and ejected from a paper ejection roller pair is accumulated, wherein an end fence that rises up at a document ejection direction upstream side of the paper ejection tray is configured of separate members that are an upper portion and a lower portion, and a rotational pivot of the release unit is provided downstream from the end fence in a feeding direction.
    Type: Application
    Filed: March 4, 2015
    Publication date: September 17, 2015
    Applicant: Ricoh Company, Limited
    Inventors: Hiroshi KUBO, Takashi FUJII, Shinya KITAOKA, Norio KIMURA
  • Publication number: 20150256701
    Abstract: A document reading device including an image reader. The image reader includes a first reader to read a first image from a first face of a document fed by a document feeder and a second reader to read a second face of the document. An operation mode is switchable between a normal operation mode in which the image reader is in an operation enabled state and an energy-saving mode in which the image reader is in an operation stop state. In a return from the energy saving mode to the normal operation mode, the image reader performs a start-up operation including a first initial operation for returning the first reader to the normal operation mode and then performs a second initial operation for returning the second reader to the normal operation mode.
    Type: Application
    Filed: March 4, 2015
    Publication date: September 10, 2015
    Applicant: RICOH COMPANY, LTD.
    Inventors: Norio KIMURA, Takashi FUJII, Hiroshi KUBO, Shinya KITAOKA
  • Patent number: 9075376
    Abstract: According to an embodiment, an ADF includes: a sheet-feed cover unit; a switch unit to be switched on or off depending on whether the sheet-feed cover unit is open or closed and including a first terminal, to which a first voltage, by which a driving motor is driven, is input, and a second terminal connected to the driving motor; and an open/close-detection circuit unit that includes a first switch circuit and a second switch circuit. The first switch circuit is switched on or off based on a threshold voltage that is larger than a second voltage to be generated in the driving motor by a jammed-document removing motion and smaller than the first voltage. The open/close-detection circuit unit detects that the sheet-feed cover unit is closed when the second switch circuit is energized, but detects that the sheet-feed cover unit is open when the second switch circuit is de-energized.
    Type: Grant
    Filed: May 17, 2013
    Date of Patent: July 7, 2015
    Assignee: Ricoh Company, Limited
    Inventors: Hiroaki Utagawa, Hiroshi Kubo, Shinya Kitaoka, Takehisa Shimazu, Takeshi Akai, Fumiyuki Heishi, Norio Kimura, Yoshito Suzuki, Jun Yamada
  • Patent number: 9013763
    Abstract: An image reading apparatus includes: a transmitting glass; and a step member that is located upstream of a reading position, at which an image of a conveyed document is read by a reading unit via a transmitting glass, in a conveying direction of the document, and has a document guiding surface at a position away from a surface of a transmitting glass by a prescribed distance and forms a step between the document guiding surface and the transmitting glass. The step member is provided with a protrusion protruding downstream in the conveying direction of the document to form space between the transmitting glass and a downstream part of the step member in the conveying direction of the document.
    Type: Grant
    Filed: December 19, 2013
    Date of Patent: April 21, 2015
    Assignee: Ricoh Company, Limited
    Inventors: Hiroshi Kubo, Hidehiko Fujiwara, Atsushi Kanaya, Shinya Kitaoka, Takeshi Akai, Fumiyuki Heishi, Takehisa Shimazu, Koki Sakano, Takuya Sano
  • Patent number: 8950743
    Abstract: According to an embodiment, an ADF that feeds and conveys original document sheets one sheet by one sheet from a tray unit to a read position on a document glass by motive power from a driving motor includes: an opening/closing unit operable to open and close relative to the document glass; an open/close detection sensor that detects an open/closed state of the opening/closing unit; a first interlock switch, which is arranged between a power source and the driving motor, that is on when the opening/closing unit is closed, and vice versa; and a control circuit that determines the open/closed state of the opening/closing unit based on detection outputs of the first interlock switch and the open/close detection sensor. The control circuit determines that the opening/closing unit is in the closed state when the first interlock switch is on and the open/close detection sensor is detecting the closed state.
    Type: Grant
    Filed: November 1, 2013
    Date of Patent: February 10, 2015
    Assignee: Ricoh Company, Limited
    Inventors: Koki Sakano, Hiroshi Kubo, Shinya Kitaoka, Takeshi Akai, Hidehiko Fujiwara, Atsushi Kanaya, Fumiyuki Heishi, Takuya Sano
  • Patent number: 8925913
    Abstract: A sheet conveying device such as a feed mechanism includes a pick-up roller and a cover member. The pick-up roller feeds, into an apparatus, a sheet such as a document on a placing table such as a document placing table on which the sheet is placed. The cover member such as a pick-up cover covers the pick-up roller. The cover member is supported at both ends thereof on a shaft of the pick-up roller or on shaft bearings that receive the shaft of the pick-up roller.
    Type: Grant
    Filed: May 30, 2013
    Date of Patent: January 6, 2015
    Assignee: Ricoh Company, Limited
    Inventors: Hiroshi Kubo, Shinya Kitaoka, Takehisa Shimazu, Takeshi Akai, Takuma Ariga, Fumiyuki Heishi, Michitaka Suzuki, Yoshito Suzuki, Norio Kimura, Hiroaki Utagawa, Kenji Hayasaka, Jun Yamada, Kenichiro Morita, Ikuhisa Okamoto, Satoshi Saito
  • Patent number: 8896891
    Abstract: A document conveying device includes a document table on which a stack of document sheets is placed; a rotating shaft member detachably provided on a main body of the document conveying device; a feeding member configured to contact and feed a topmost sheet of the stack of document sheets, the feeding member being attached to the rotating shaft member via a driving force transmitting member; a separating unit configured to separate the topmost sheet from one or more sheets that are fed together with the topmost sheet, rotating members rotatably attached to the rotating shaft member; a holding member configured to hold the feeding member and the driving force transmitting member; and a rotating member position restricting unit configured to restrict a position of the rotating members other than the holding member to a given predetermined position with reference to a position of the holding member.
    Type: Grant
    Filed: March 14, 2013
    Date of Patent: November 25, 2014
    Assignee: Ricoh Company, Limited
    Inventors: Fumiyuki Heishi, Hiroshi Kubo, Takashi Fujii, Shinya Kitaoka, Takeshi Akai, Takehisa Shimazu, Takuma Ariga, Michitaka Suzuki, Yoshito Suzuki, Jun Yamada, Satoshi Saito, Kenichiro Morita, Ikuhisa Okamoto, Kenji Hayasaka, Hiroaki Utagawa
  • Publication number: 20140239573
    Abstract: An auto document feeder includes a movable document table on which documents are stacked, a pickup roller that feeds a topmost document among the documents on the movable document table to a feed position via a feed opening, and a shielding member that is arranged on the upstream side of the pickup roller and above the topmost document, and that shields the feed opening. At least an end portion of the shielding member on the document table side is made of a flexible member.
    Type: Application
    Filed: February 21, 2014
    Publication date: August 28, 2014
    Applicant: RICOH COMPANY, LIMITED
    Inventors: Takeshi AKAI, Shinya KITAOKA, Koki SAKANO, Fumiyuki HEISHI
  • Publication number: 20140177012
    Abstract: An image reading apparatus includes: a transmitting glass; and a step member that is located upstream of a reading position, at which an image of a conveyed document is read by a reading unit via a transmitting glass, in a conveying direction of the document, and has a document guiding surface at a position away from a surface of a transmitting glass by a prescribed distance and forms a step between the document guiding surface and the transmitting glass. The step member is provided with a protrusion protruding downstream in the conveying direction of the document to form space between the transmitting glass and a downstream part of the step member in the conveying direction of the document.
    Type: Application
    Filed: December 19, 2013
    Publication date: June 26, 2014
    Applicant: RICOH COMPANY, LIMITED
    Inventors: Hiroshi KUBO, Hidehiko FUJIWARA, Atsushi KANAYA, Shinya KITAOKA, Takeshi AKAI, Fumiyuki HEISHI, Takehisa SHIMAZU, Koki SAKANO, Takuya SANO
  • Patent number: 8743431
    Abstract: A sheet conveying device includes: a sheet housing unit that houses a sheet; a sheet conveying unit that conveys the sheet; a sheet detection unit that detects presence or absence of the sheet in the sheet housing unit; a sheet nipping unit that nips the sheet housed in the sheet housing unit; and a control unit. The control unit controls the sheet nipping unit to reach a nipping state to nip the sheet in the sheet housing unit upon the sheet detection unit detecting a sheet-present state, executes a power saving mode to stop supplying power to at least a part of the electric mechanisms when no drive command is input for a predetermined time, and controls the sheet nipping unit to cancel the nipping state before execution of the power saving mode.
    Type: Grant
    Filed: February 15, 2013
    Date of Patent: June 3, 2014
    Assignee: Ricoh Company, Limited
    Inventors: Kenji Hayasaka, Hiroshi Kubo, Shinya Kitaoka, Takehisa Shimazu, Takeshi Akai, Takuma Ariga, Fumiyuki Heishi, Yoshito Suzuki, Akihito Kameda, Hiroaki Utagawa, Jun Yamada, Takashi Fujii, Motoya Sano, Satoshi Saito, Ikuhisa Okamoto, Kenichiro Morita
  • Patent number: 8736926
    Abstract: A sheet conveyance device includes a loading section, a sheet feeding unit, a separation section disposed downstream in a sheet conveyance direction from the sheet feeding unit, a conveyance member to transport a sheet separated by the separation section, a trailing-edge detector disposed at a first conveyance distance (L1) downstream from a separation position (Ab) and including a rotary follower and a rotation detector, a first leading-edge detector disposed downstream from the trailing-edge detector, and a controller. The trailing-edge detector A detects a sheet length in the sheet conveyance direction. The controller causes the sheet feeding unit to start sheet feeding in response to detection of the leading edge of the sheet by the first leading-edge detector when the detected sheet length equals a predetermined reference length and in other cases in response to detection of the trailing edge of the sheet by the trailing-edge detector.
    Type: Grant
    Filed: May 23, 2012
    Date of Patent: May 27, 2014
    Assignee: Ricoh Company, Ltd.
    Inventors: Yoshito Suzuki, Hideki Tobinaga, Atsushi Kanaya, Shinya Kitaoka, Norio Kimura, Mamoru Kambayashi, Michitaka Suzuki, Kenichiro Morita
  • Publication number: 20140140744
    Abstract: An automatic document feeder includes a document stack unit; a conveying unit configured to separate a document from the documents stacked on the document stack unit and convey the document to a scanning position through a conveying path; document detecting units configured to detect the document; an upstream document detecting unit configured to detect the document, the upstream document detecting unit being arranged in the conveying path at an uppermost stream in a document conveying direction with respect to the document detecting units; and a determining unit configured to determine a passage of a trailing end of the document at positions of the document detecting units and the upstream document detecting unit and determine a presence of a hole on the document, based on the detection results. A detection range of the upstream document detecting unit is set to be wider than detection ranges of the document detecting units.
    Type: Application
    Filed: November 15, 2013
    Publication date: May 22, 2014
    Applicant: Ricoh Company, Limited
    Inventors: Takeshi AKAI, Takashi FUJII, Satoshi SAITO, Hiroshi KUBO, Ikuhisa OKAMOTO, Shinya KITAOKA, Takehisa SHIMAZU, Kenichiro MORITA, Yoshito SUZUKI, Takuma ARIGA, Jun YAMADA, Kenji HAYASAKA, Akihito KAMEDA, Hiroaki UTAGAWA, Fumiyuki HEISHI
  • Publication number: 20140125007
    Abstract: According to an embodiment, an ADF that feeds and conveys original document sheets one sheet by one sheet from a tray unit to a read position on a document glass by motive power from a driving motor includes: an opening/closing unit operable to open and close relative to the document glass; an open/close detection sensor that detects an open/closed state of the opening/closing unit; a first interlock switch, which is arranged between a power source and the driving motor, that is on when the opening/closing unit is closed, and vice versa; and a control circuit that determines the open/closed state of the opening/closing unit based on detection outputs of the first interlock switch and the open/close detection sensor. The control circuit determines that the opening/closing unit is in the closed state when the first interlock switch is on and the open/close detection sensor is detecting the closed state.
    Type: Application
    Filed: November 1, 2013
    Publication date: May 8, 2014
    Applicant: RICOH COMPANY, LIMITED
    Inventors: Koki SAKANO, Hiroshi KUBO, Shinya KITAOKA, Takeshi AKAI, Hidehiko FUJIWARA, Atsushi KANAYA, Fumiyuki HEISHI, Takuya SANO
  • Patent number: 8641035
    Abstract: A sheet conveying apparatus includes: a sheet housing unit that houses sheets in a stacked manner; a sheet conveying unit that conveys a sheet to a predetermined conveyance target position; a sheet pick-up unit that picks up outermost one of the sheets housed in the sheet housing unit for conveying to a sheet conveying unit side; a separating and conveying unit that separates the next sheet from the outermost sheet, and conveys only the outermost sheet to the sheet conveying unit; and a sheet-conveyance-movement detecting unit that detects presence or absence of movement of a sheet in the conveying direction. The sheet-conveyance-movement detecting unit is arranged at a position at which the outermost sheet and the next sheet may overlap each other, and a separation portion is located downstream of the pick-up position and is an area where a separation action of the separating and conveying unit works.
    Type: Grant
    Filed: October 5, 2011
    Date of Patent: February 4, 2014
    Assignee: Ricoh Company, Limited
    Inventors: Mamoru Kambayashi, Hideki Tobinaga, Shinya Kitaoka, Atsushi Kanaya, Norio Kimura, Michitaka Suzuki, Yoshito Suzuki, Kenichiro Morita