Patents by Inventor Hidetoshi Kojima

Hidetoshi Kojima 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: 10518992
    Abstract: A sheet conveying device includes a sheet loader, a loader elevating device, a sheet presence detector to detect a sheet on the sheet loader, and circuitry configured to determine whether the bundle of sheets is loaded on the sheet loader based on a detection result of the sheet presence detector and to control movement of the loader elevating device. The circuitry is configured to cause the loader elevating device to lift the sheet loader to a second position in response to a detection result of the sheet presence detector indicating absence of the sheet on the sheet loader at a first position and not to determine absence of the sheet when the circuitry causes the loader elevating device to lower the sheet loader from the second position to the first position after the circuitry causes the loader elevating device to lift the sheet loader to the second position.
    Type: Grant
    Filed: November 6, 2018
    Date of Patent: December 31, 2019
    Assignee: Ricoh Company, Ltd.
    Inventors: Yousuke Edo, Hikaru Fukasawa, Hidetoshi Kojima
  • Publication number: 20190256531
    Abstract: The present invention provides a compound represented by the general formula (Ia) or a pharmacologically acceptable salt thereof. In the general formula (Ia), two R moieties each independently represent a C1-3 alkyl group or the like; and R1, R2 and R3 each independently represent an optionally substituted linear or branched C1-4 alkyl group.
    Type: Application
    Filed: April 3, 2019
    Publication date: August 22, 2019
    Applicant: UBE INDUSTRIES, LTD.
    Inventors: Noriaki IWASE, Yasuhiro AGA, Shigeru USHIYAMA, Shigeyuki KONO, Hidetoshi SUNAMOTO, Takashi MATSUSHITA, Sayaka OGI, Satoshi UMEZAKI, Masahiro KOJIMA, Kazuhiro ONUMA, Yusuke SHIRAISHI, Makoto OKUDO, Tomio KIMURA
  • Publication number: 20190210821
    Abstract: A sheet conveying device includes a sheet loader, a loader elevating device, a sheet presence detector to detect a sheet on the sheet loader, and circuitry configured to determine whether the bundle of sheets is loaded on the sheet loader based on a detection result of the sheet presence detector and to control movement of the loader elevating device. The circuitry is configured to cause the loader elevating device to lift the sheet loader to a second position in response to a detection result of the sheet presence detector indicating absence of the sheet on the sheet loader at a first position and not to determine absence of the sheet when the circuitry causes the loader elevating device to lower the sheet loader from the second position to the first position after the circuitry causes the loader elevating device to lift the sheet loader to the second position.
    Type: Application
    Filed: November 6, 2018
    Publication date: July 11, 2019
    Applicant: Ricoh Company, Ltd.
    Inventors: Yousuke Edo, Hikaru Fukasawa, Hidetoshi Kojima
  • Patent number: 10315870
    Abstract: A sheet feeding device, which is included in an image forming apparatus and an image forming system, includes a sheet loader, an air drawing body, an attracting and conveying device, an air duct and a blocking device. The sheet loader is a device on which a bundle of sheets is loaded. The air drawing body is configured to generate suction air. The attracting and conveying device is configured to attract a sheet on top of the bundle of sheets by the suction air and convey the sheet. The air duct is configured to intake the suction air drawn by the air drawing body, to the attracting and conveying device. The blocking device is configured to block the suction air in the air duct.
    Type: Grant
    Filed: February 14, 2018
    Date of Patent: June 11, 2019
    Assignee: RICOH COMPANY, LTD.
    Inventors: Toshihiro Okutsu, Takashi Fukumoto, Masaki Ishizaki, Tatsuya Sugawara, Sachika Tamaki, Hideaki Takahashi, Hidetoshi Kojima, Yohsuke Takamiya
  • Publication number: 20180237239
    Abstract: A sheet feeding device, which is included in an image forming apparatus and an image forming system, includes a sheet loader, an air drawing body, an attracting and conveying device, an air duct and a blocking device. The sheet loader is a device on which a bundle of sheets is loaded. The air drawing body is configured to generate suction air. The attracting and conveying device is configured to attract a sheet on top of the bundle of sheets by the suction air and convey the sheet. The air duct is configured to intake the suction air drawn by the air drawing body, to the attracting and conveying device. The blocking device is configured to block the suction air in the air duct.
    Type: Application
    Filed: February 14, 2018
    Publication date: August 23, 2018
    Applicant: Ricoh Company, Ltd.
    Inventors: Toshihiro OKUTSU, Takashi FUKUMOTO, Masaki ISHIZAKI, Tatsuya SUGAWARA, Sachika TAMAKI, Hideaki TAKAHASHI, Hidetoshi KOJIMA, Yohsuke TAKAMIYA
  • Patent number: 10017342
    Abstract: A paper sheet conveyance device includes a plurality of conveyance members and conveys a paper sheet while performing temporary stop of conveying and then restart of conveying. Two paper sheets sequential in a conveyance direction stop together in a state of the temporary stop, driving a first transfer member to which a preceding first paper sheet that is one of the two paper sheets is opposed and a second conveyance member to which a following second paper sheet that is the other paper sheet is opposed is stopped and restarted synchronously for the temporary stop and the restart. A stop position information acquisition unit acquires information on a position on the conveyance path at which the second paper sheet stops in the state of the temporary stop, and a timing for stopping the conveying after the conveying is restarted is controlled according to the acquired information.
    Type: Grant
    Filed: March 4, 2016
    Date of Patent: July 10, 2018
    Assignee: RICOH COMPANY, LIMITED
    Inventors: Toshihiro Okutsu, Masaki Ishizaki, Yasuo Niikura, Hidetoshi Kojima, Masato Hashimoto, Munehisa Fuda, Tatsuya Sugawara, Kohjiroh Haga, Kiyotake Nakamura, Hideaki Takahashi, Takashi Fukumoto
  • Patent number: 9926151
    Abstract: A sheet feeder, which is included in an image forming apparatus, includes a sheet loader, an air blowing device, a regulator, a sheet attracting device, and a sheet conveying body. The sheet loader loads a sheet bundle including a sheet and a subsequent sheet placed below the sheet. The air blowing device blows air and lifts the sheet over the sheet bundle. The regulator regulates movement of the subsequent sheet, and includes an opposing portion located upper end and separated from the sheet loader toward the downstream side of the sheet conveying direction and an inclined portion upwardly inclined relative to a vertical axis from a same position as the sheet loader to the downstream side of the sheet conveying direction. The sheet attracting device attracts the sheet lifted over the sheet bundle. The sheet conveying body conveys the sheet in a sheet conveying direction.
    Type: Grant
    Filed: April 10, 2017
    Date of Patent: March 27, 2018
    Assignee: Ricoh Company, Ltd.
    Inventors: Hideaki Takahashi, Takashi Fukumoto, Hidetoshi Kojima, Tatsuya Sugawara, Masato Hashimoto, Takaaki Sanpei, Kim Foon Lee
  • Patent number: 9926157
    Abstract: A sheet feeder, which is included in an image forming apparatus and an image forming system, includes a sheet loader on which a sheet bundle is loaded, an air blower to blow air to the sheet bundle loaded on the sheet loader and float upper sheets of the sheet bundle, a loader elevation device to lift and lower the sheet loader, a reflective optical detector including a first reflective optical detector to detect the upper sheets floated by the air blower and a second reflective optical detector to detect multiple floating sheets located below the floating sheets detected by the first reflective optical detector, and a controller configured to control the loader elevation device to perform a lifting operation of the sheet loader based on a combination of an output value of the first reflective optical detector and an output value of the second reflective optical detector.
    Type: Grant
    Filed: November 30, 2016
    Date of Patent: March 27, 2018
    Assignee: Ricoh Company, Ltd.
    Inventors: Tatsuya Sugawara, Takashi Fukumoto, Hideaki Takahashi, Hidetoshi Kojima
  • Publication number: 20170327329
    Abstract: A sheet feeder, which is included in an image forming apparatus, includes a sheet loader, an air blowing device, a regulator, a sheet attracting device, and a sheet conveying body. The sheet loader loads a sheet bundle including a sheet and a subsequent sheet placed below the sheet. The air blowing device blows air and lifts the sheet over the sheet bundle. The regulator regulates movement of the subsequent sheet, and includes an opposing portion located upper end and separated from the sheet loader toward the downstream side of the sheet conveying direction and an inclined portion upwardly inclined relative to a vertical axis from a same position as the sheet loader to the downstream side of the sheet conveying direction. The sheet attracting device attracts the sheet lifted over the sheet bundle. The sheet conveying body conveys the sheet in a sheet conveying direction.
    Type: Application
    Filed: April 10, 2017
    Publication date: November 16, 2017
    Applicant: Ricoh Company, Ltd.
    Inventors: Hideaki TAKAHASHI, Takashi FUKUMOTO, Hidetoshi KOJIMA, Tatsuya SUGAWARA, Masato HASHIMOTO, Takaaki SANPEI, Kim Foon LEE
  • Patent number: 9802775
    Abstract: A sheet separating device includes: a lifting nozzle configured to blow air against an end portion of a sheet bundle placed on a sheet loading portion to lift sheets; a separating nozzle configured to separate the sheets; a lifting-nozzle shutter member configured to open and close the lifting nozzle; a separating-nozzle shutter member configured to open and close the separating nozzle; a lifting-shutter driving mechanism configured to drive the lifting-nozzle shutter member; a separating-shutter driving mechanism configured to drive the separating-nozzle shutter member; and an open/close control unit configured to control the lifting-shutter driving mechanism and the separating-shutter driving mechanism such that the lifting-nozzle shutter member and the separating-nozzle shutter member are opened or closed simultaneously.
    Type: Grant
    Filed: October 8, 2015
    Date of Patent: October 31, 2017
    Assignee: Ricoh Company, Limited
    Inventors: Masato Hashimoto, Takashi Fukumoto, Hideaki Takahashi, Hisayoshi Sugawara, Munehisa Fuda, Yasuo Niikura, Masaki Ishizaki, Kiyotake Nakamura, Hidetoshi Kojima, Toshihiro Okutsu, Kazunori Konno, Tatsuya Sugawara, Kohjiroh Haga
  • Patent number: 9796552
    Abstract: A paper feeding apparatus includes: a sheet loading unit for loading a bundle of sheets; a separation unit that separates a topmost sheet of the bundle of sheets loaded on the sheet loading unit, from the bundle of sheets; a conveyance unit that conveys the separated topmost sheet; an end fence that is movable in a sheet conveyance direction, abuts trailing ends in the sheet conveyance direction, and positions the bundle of sheets in the sheet conveyance direction; and a pressing unit that is provided in such a manner as to protrude from the end fence, and is able to press the trailing ends in the sheet conveyance direction of at least an upper part of the bundle of sheets, wherein the pressing unit has different pressing forces at an upper and a lower portion thereof, and has the lower pressing force stronger than the upper pressing force.
    Type: Grant
    Filed: November 30, 2016
    Date of Patent: October 24, 2017
    Assignee: RICOH COMPANY, LIMITED
    Inventors: Takashi Fukumoto, Yasuo Niikura, Hidetoshi Kojima, Hideaki Takahashi, Munehisa Fuda, Hisayoshi Sugawara, Kiyotake Nakamura, Kazunori Konno, Tatsuya Sugawara, Toshihiro Okutsu, Kohjiroh Haga
  • Patent number: 9725265
    Abstract: Provided are a floating restricting member restricting the floating position of a bundle of sheets; and a holding mechanism holding the floating restricting member relative to a side fence. The floating restricting member includes a sheet contact section being brought into contact with the sheets from above; and a sheet-floating restricting section restricting the floating position of the floating sheet that is floated while air is blown thereto. The holding mechanism sets the floating restricting member in the initial state where the sheet-floating restricting section restricts the floating position of the sheet, in the sheet-placing time retracted state where the sheets are pushed against the sheet contact section so that the floating restricting member is retracted, and in the sheet-ejecting time retracted state where, when the sheets are to be removed, the sheet is pushed against the sheet contact section from below so that the floating restricting member is retracted.
    Type: Grant
    Filed: October 2, 2015
    Date of Patent: August 8, 2017
    Assignee: RICOH COMPANY, LIMITED
    Inventors: Masato Hashimoto, Takashi Fukumoto, Hideaki Takahashi, Hisayoshi Sugawara, Munehisa Fuda, Yasuo Niikura, Masaki Ishizaki, Kiyotake Nakamura, Hidetoshi Kojima, Toshihiro Okutsu, Kazunori Konno, Tatsuya Sugawara, Kohjiroh Haga
  • Publication number: 20170160689
    Abstract: A sheet feeder, which is included in an image forming apparatus and an image forming system, includes a sheet loader on which a sheet bundle is loaded, an air blower to blow air to the sheet bundle loaded on the sheet loader and float upper sheets of the sheet bundle, a loader elevation device to lift and lower the sheet loader, a reflective optical detector including a first reflective optical detector to detect the upper sheets floated by the air blower and a second reflective optical detector to detect multiple floating sheets located below the floating sheets detected by the first reflective optical detector, and a controller configured to control the loader elevation device to perform a lifting operation of the sheet loader based on a combination of an output value of the first reflective optical detector and an output value of the second reflective optical detector.
    Type: Application
    Filed: November 30, 2016
    Publication date: June 8, 2017
    Applicant: Ricoh Company, Ltd.
    Inventors: Tatsuya SUGAWARA, Takashi Fukumoto, Hideaki Takahashi, Hidetoshi Kojima
  • Publication number: 20170081140
    Abstract: A paper feeding apparatus includes: a sheet loading unit for loading a bundle of sheets; a separation unit that separates a topmost sheet of the bundle of sheets loaded on the sheet loading unit, from the bundle of sheets; a conveyance unit that conveys the separated topmost sheet; an end fence that is movable in a sheet conveyance direction, abuts trailing ends in the sheet conveyance direction, and positions the bundle of sheets in the sheet conveyance direction; and a pressing unit that is provided in such a manner as to protrude from the end fence, and is able to press the trailing ends in the sheet conveyance direction of at least an upper part of the bundle of sheets, wherein the pressing unit has different pressing forces at an upper and a lower portion thereof, and has the lower pressing force stronger than the upper pressing force.
    Type: Application
    Filed: November 30, 2016
    Publication date: March 23, 2017
    Applicant: Ricoh Company, Ltd.
    Inventors: Takashi FUKUMOTO, Yasuo NIIKURA, Hidetoshi KOJIMA, Hideaki TAKAHASHI, Munehisa FUDA, Hisayoshi SUGAWARA, Kiyotake NAKAMURA, Kazunori KONNO, Tatsuya SUGAWARA, Toshihiro OKUTSU, Kohjiroh HAGA
  • Patent number: 9561927
    Abstract: A sheet discharging device includes a shift tray 202 on which a sheet P1 is stacked, a discharging roller 6 that discharges a sheet P2 onto the shift tray 202, a blowing device 230 that sends air to a lower surface of the sheet P2 discharged by the discharging roller 6, a blocking member 231 that blocks air sent to the lower surface of the sheet P2 from a blowing port 230-2 of the blowing device 230, and a control unit that controls the blocking amount of the blocking member 231. The blocking amount is determined based upon sheet information including sheet-type information, sheet-size information, and sheet-thickness information, for example.
    Type: Grant
    Filed: November 25, 2015
    Date of Patent: February 7, 2017
    Assignee: RICOH COMPANY, LIMITED
    Inventors: Tomomichi Hoshino, Masahiro Tamura, Shuuya Nagasako, Tomohiro Furuhashi, Keisuke Sugiyama, Kyosuke Nakada, Kazuya Yamamoto, Akira Kunieda, Takahiro Watanabe, Junya Suzuki, Kazunori Konno, Youhei Niitsuma, Takamasa Matsumoto, Kiichiro Goto, Kazuhiko Kitano, Takashi Fukumoto, Yasuo Niikura, Satoru Takano, Hidetoshi Kojima, Kei Sasaki, Yasushi Tsuruoka, Shintaro Matsumoto, Ryo Takahashi, Yuuta Mori, Kohjiroh Haga
  • Patent number: 9540193
    Abstract: A paper feeding apparatus includes: a sheet loading unit for loading a bundle of sheets; a separation unit that separates a topmost sheet of the bundle of sheets loaded on the sheet loading unit, from the bundle of sheets; a conveyance unit that conveys the separated topmost sheet; an end fence that is movable in a sheet conveyance direction, abuts trailing ends in the sheet conveyance direction, and positions the bundle of sheets in the sheet conveyance direction; and a pressing unit that is provided in such a manner as to protrude from the end fence, and is able to press the trailing ends in the sheet conveyance direction of at least an upper part of the bundle of sheets, wherein the pressing unit has different pressing forces at an upper and a lower portion thereof, and has the lower pressing force stronger than the upper pressing force.
    Type: Grant
    Filed: October 29, 2015
    Date of Patent: January 10, 2017
    Assignee: RICOH COMPANY, LIMITED
    Inventors: Takashi Fukumoto, Yasuo Niikura, Hidetoshi Kojima, Hideaki Takahashi, Munehisa Fuda, Hisayoshi Sugawara, Kiyotake Nakamura, Kazunori Konno, Tatsuya Sugawara, Toshihiro Okutsu, Kohjiroh Haga
  • Publication number: 20160264370
    Abstract: A paper sheet conveyance device includes a plurality of conveyance members and conveys a paper sheet while performing temporary stop of conveying and then restart of conveying. Two paper sheets sequential in a conveyance direction stop together in a state of the temporary stop, driving a first transfer member to which a preceding first paper sheet that is one of the two paper sheets is opposed and a second conveyance member to which a following second paper sheet that is the other paper sheet is opposed is stopped and restarted synchronously for the temporary stop and the restart. A stop position information acquisition unit acquires information on a position on the conveyance path at which the second paper sheet stops in the state of the temporary stop, and a timing for stopping the conveying after the conveying is restarted is controlled according to the acquired information.
    Type: Application
    Filed: March 4, 2016
    Publication date: September 15, 2016
    Applicant: Ricoh Company, Limited
    Inventors: Toshihiro OKUTSU, Masaki ISHIZAKI, Yasuo NIIKURA, Hidetoshi KOJIMA, Masato HASHIMOTO, Munehisa FUDA, Tatsuya SUGAWARA, Kohjiroh HAGA, Kiyotake NAKAMURA, Hideaki TAKAHASHI, Takashi FUKUMOTO
  • Publication number: 20160185552
    Abstract: A sheet discharging device includes a shift tray 202 on which a sheet P1 is stacked, a discharging roller 6 that discharges a sheet P2 onto the shift tray 202, a blowing device 230 that sends air to a lower surface of the sheet P2 discharged by the discharging roller 6, a blocking member 231 that blocks air sent to the lower surface of the sheet P2 from a blowing port 230-2 of the blowing device 230, and a control unit that controls the blocking amount of the blocking member 231. The blocking amount is determined based upon sheet information including sheet-type information, sheet-size information, and sheet-thickness information, for example.
    Type: Application
    Filed: November 25, 2015
    Publication date: June 30, 2016
    Applicant: Ricoh Company, LIMITED
    Inventors: Tomomichi HOSHINO, Masahiro TAMURA, Shuuya NAGASAKO, Tomohiro FURUHASHI, Keisuke SUGIYAMA, Kyosuke NAKADA, Kazuya YAMAMOTO, Akira KUNIEDA, Takahiro WATANABE, Junya SUZUKI, Kazunori KONNO, Youhei NIITSUMA, Takamasa MATSUMOTO, Kiichiro GOTO, Kazuhiko KITANO, Takashi FUKUMOTO, Yasuo NIIKURA, Satoru TAKANO, Hidetoshi KOJIMA, Kei SASAKI, Yasushi TSURUOKA, Shintaro MATSUMOTO, Ryo TAKAHASHI, Yuuta MORI, Kohjiroh HAGA
  • Patent number: 9359157
    Abstract: A sheet feeding device includes: a sheet feeding tray attached to a casing in a manner slidable into and out from the casing and including a stacking plate on which sheets are stacked; a conveying unit configured to convey the sheets in a direction orthogonal to both a sliding direction of the sheet feeding tray and a stacking direction of the sheets; an optional extension unit configured to be removably attached to an upstream side of the stacking plate in a conveying direction, and including an extension plate configured to extend the stacking plate; and a first locking unit configured to be capable of being held in a first lock position where the sheet feeding tray cannot be slide when the optional extension unit is attached while, when the optional extension unit is removed, held in a first unlock position where the sheet feeding tray can be slid.
    Type: Grant
    Filed: May 19, 2015
    Date of Patent: June 7, 2016
    Assignee: Ricoh Company, Ltd.
    Inventors: Yasuo Niikura, Hidetoshi Kojima, Yuuta Mori, Takashi Fukumoto, Kiyotake Nakamura, Munehisa Fuda, Hideaki Takahashi, Hisayoshi Sugawara, Kazunori Konno, Tatsuya Sugawara, Kohjiroh Haga, Toshihiro Okutsu
  • Patent number: 9359158
    Abstract: A sheet feeding device includes: a sheet stacking member; an air blowing unit configured to blow air onto the sheet bundle placed on the sheet stacking member to suspend multiple sheets of the sheet bundle; a lifting/lowering unit configured to lift/lower the sheet stacking member; an optical reflection sensor configured to detect a suspended sheet suspended by the air blowing unit; and a control unit configured to control the lifting/lowering unit based on an output value of the optical reflection sensor. The optical reflection sensor is configured to be capable of detecting an area corresponding to multiple sheets in a sheet suspension zone extending between a non-suspended sheet bundle and a conveying member configured to convey an uppermost sheet of the multiple suspended sheets. The non-suspended sheet bundle is made up of sheets not suspended during a period when air is blown by the air blowing unit.
    Type: Grant
    Filed: December 11, 2014
    Date of Patent: June 7, 2016
    Assignee: RICOH COMPANY, LIMITED
    Inventors: Yasunori Hino, Chikara Akata, Tomoki Tamate, Hideaki Takahashi, Munehisa Fuda, Toshihiro Okutsu, Takashi Fukumoto, Yasuo Niikura, Masaki Ishizaki, Kiyotake Nakamura, Hidetoshi Kojima, Hisayoshi Sugawara, Kazunori Konno, Tatsuya Sugawara, Kohjiroh Haga, Masato Hashimoto