Patents by Inventor Yohzoh Dohki
Yohzoh Dohki 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).
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Patent number: 8276899Abstract: A media-sheet post-processing apparatus performs post-processing on a media sheet delivered thereto. The sheet media post-processing apparatus includes a media-sheet conveying unit configured to convey a media sheet while moving in a media-sheet conveying direction; and a move drive unit configured to move the media-sheet conveying unit in the media-sheet conveying direction in such a manner that a difference between an amount that the media sheet is conveyed by the media-sheet conveying unit and an amount that the media-sheet conveying unit is moved is kept constant.Type: GrantFiled: April 6, 2010Date of Patent: October 2, 2012Assignee: Ricoh Company, LimitedInventors: Masanobu Kimata, Yohzoh Dohki
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Patent number: 8070250Abstract: An image forming apparatus includes a recording head, a transport belt, a pressure device, a sheet detection device, an ejection/transport device, and a control device. The control device controls generating a first stop timing of the sheet transportation by the transport belt, at which first stop timing the transfer belt stops transporting the sheet, and that controls a predetermined delay time after which a second stop timing is generated, at which second stop timing the ejection/transport device stops transporting the sheet, and that shortens the delay time after the sheet detection device detects a trailing edge of the sheet.Type: GrantFiled: November 17, 2008Date of Patent: December 6, 2011Assignee: Ricoh Company, Ltd.Inventor: Yohzoh Dohki
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Patent number: 7950797Abstract: A disclosed image forming apparatus includes a recording head configured to eject liquid droplets onto a sheet to form an image; a transport unit configured to intermittently transport the sheet; a discharge transport unit disposed downstream the transport unit in a transport direction, the discharge transport unit including plural transport rollers configured to transport the sheet in a sheet discharge direction and plural spurs disposed facing the respective transport rollers and arranged in the transport direction; a guide member configured to hold the spurs and be rotatable about a most downstream side or a most upstream side in the transport direction to rotate in a direction away from a sheet transport path; and a stopping and holding unit configured to stop and hold the guide member in a position in which only the spur in the most downstream side in the transport direction is in contact with the sheet.Type: GrantFiled: December 2, 2008Date of Patent: May 31, 2011Assignee: Ricoh Company. Ltd.Inventors: Akihiro Fujita, Shinichiro Naruse, Yohzoh Dohki
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Publication number: 20100252981Abstract: A media-sheet post-processing apparatus performs post-processing on a media sheet delivered thereto. The sheet media post-processing apparatus includes a media-sheet conveying unit configured to convey a media sheet while moving in a media-sheet conveying direction; and a move drive unit configured to move the media-sheet conveying unit in the media-sheet conveying direction in such a manner that a difference between an amount that the media sheet is conveyed by the media-sheet conveying unit and an amount that the media-sheet conveying unit is moved is kept constant.Type: ApplicationFiled: April 6, 2010Publication date: October 7, 2010Inventors: Masanobu Kimata, Yohzoh Dohki
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Publication number: 20100149299Abstract: An inkjet recording apparatus provides an improved printing speed and improved convenience of use. A recording head discharges droplets of a recording liquid onto a paper so as to form an image on the paper. A belt conveyance mechanism has a belt onto which the paper is electrostatically attached. The paper attached onto the belt is conveyed in a direction perpendicular to a carding direction of the paper.Type: ApplicationFiled: February 23, 2010Publication date: June 17, 2010Inventors: Hajime NISHIDA, Manabu Nonaka, Eiki Yoshimizu, Shinichiro Naruse, Yasuhiro Kawashima, Hideki Sueoka, Tetsu Morino, Kazumasa Ishikawa, Yasunobu Youda, Akihiro Fujita, Shoji Asanuma, Masatoshi Sakakitani, Taku Kudoh, Shigeyuki Ito, Yohzoh Dohki, Koji Watanabe
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Patent number: 7712892Abstract: An inkjet recording apparatus provides an improved printing speed and improved convenience of use. A recording head discharges droplets of a recording liquid onto a paper so as to form an image on the paper. A belt conveyance mechanism has a belt onto which the paper is electrostatically attached. The paper attached onto the belt is conveyed in a direction perpendicular to a carding direction of the paper.Type: GrantFiled: March 2, 2005Date of Patent: May 11, 2010Assignee: Ricoh Company, Ltd.Inventors: Hajime Nishida, Manabu Nonaka, Eiki Yoshimizu, Shinichiro Naruse, Yasuhiro Kawashima, Hideki Sueoka, Tetsu Morino, Kazumasa Ishikawa, Yasunobu Youda, Akihiro Fujita, Shoji Asanuma, Masatoshi Sakakitani, Taku Kudoh, Shigeyuki Ito, Yohzoh Dohki, Koji Watanabe
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Publication number: 20090147066Abstract: A disclosed image forming apparatus includes a recording head configured to eject liquid droplets onto a sheet to form an image; a transport unit configured to intermittently transport the sheet; a discharge transport unit disposed downstream the transport unit in a transport direction, the discharge transport unit including plural transport rollers configured to transport the sheet in a sheet discharge direction and plural spurs disposed facing the respective transport rollers and arranged in the transport direction; a guide member configured to hold the spurs and be rotatable about a most downstream side or a most upstream side in the transport direction to rotate in a direction away from a sheet transport path; and a stopping and holding unit configured to stop and hold the guide member in a position in which only the spur in the most downstream side in the transport direction is in contact with the sheet.Type: ApplicationFiled: December 2, 2008Publication date: June 11, 2009Applicant: RICOH COMPANY, LTD.Inventors: Akihiro FUJITA, Shinichiro Naruse, Yohzoh Dohki
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Publication number: 20090127776Abstract: An image forming apparatus includes a recording head, a transport belt, a pressure device, a sheet detection device, an ejection/transport device, and a control device. The control device controls generating a first stop timing of the sheet transportation by the transport belt, at which first stop timing the transfer belt stops transporting the sheet, and that controls a predetermined delay time after which a second stop timing is generated, at which second stop timing the ejection/transport device stops transporting the sheet, and that shortens the delay time after the sheet detection device detects a trailing edge of the sheet.Type: ApplicationFiled: November 17, 2008Publication date: May 21, 2009Inventor: Yohzoh Dohki
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Patent number: 7505714Abstract: In an image forming device comprising an image forming part forming an image on a recording sheet, a sheet ejection part provided above the image forming part and stacking the recording sheet on which the image is formed by the image forming part, and an image reading part provided above the sheet ejection part and reading an image of an original document, the sheet ejection part is provided with a cover which is capable of being opened or closed to the sheet ejection part.Type: GrantFiled: May 25, 2005Date of Patent: March 17, 2009Assignee: Ricoh Company, Ltd.Inventors: Shoji Asanuma, Shuji Tanaka, Manabu Nonaka, Kazumasa Ishikawa, Taku Kudoh, Hajime Nishida, Akihiro Fujita, Yasuhiro Kawashima, Kenji Kameyama, Yasunobu Youda, Eiki Yoshimizu, Shinichiro Naruse, Yohzoh Dohki, Shigeyuki Ito
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Patent number: 7434928Abstract: An image forming apparatus comprises a guide part guiding transportation of a recording medium after recording by a liquid droplet ejection head at a recording position, the guide part carrying plural spurs for holding the medium on which recording has been made at the recording position, the guide part being movable between a guide position in which the spurs are engaged with the recording medium and a release position in which the spurs are disengaged from the recording medium, wherein there is provided a protective member to the guide part such that the protective member is movable between a protective position protecting the spurs and a retracted position retracted from the spurs.Type: GrantFiled: September 13, 2005Date of Patent: October 14, 2008Assignee: Ricoh Company, Ltd.Inventor: Yohzoh Dohki
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Patent number: 7431422Abstract: A head cleaner is disclosed that includes a blade that has a top face and wipes the nozzle face of a liquid droplet ejecting head that ejects liquid droplets from nozzles, and a cleaning part that cleans the top face of the blade.Type: GrantFiled: December 13, 2004Date of Patent: October 7, 2008Assignee: Ricoh Company, Ltd.Inventors: Shoji Asanuma, Manabu Nonaka, Hajime Nishida, Akihiro Fujita, Eiki Yoshimizu, Shinichiro Naruse, Yasuhiro Kawashima, Taku Kudoh, Kazumasa Ishikawa, Yohzoh Dohki, Shigeyuki Ito
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Patent number: 7418235Abstract: An image forming apparatus includes a reverse conveyance path, a straight conveyance path, a duplex conveyance path, and two branch boards. The reverse conveyance path is used to output a recording sheet face down. The straight conveyance path is used to straight output a recording sheet face up. The duplex conveyance path is used to output a recording sheet on both sides of which images are formed. The two branch boards sandwich the straight conveyance path. At least one of the two branch boards swings at a time to switch to any one of the reverse conveyance path, the straight conveyance path, and the duplex conveyance path.Type: GrantFiled: May 10, 2005Date of Patent: August 26, 2008Assignee: Ricoh Company, Ltd.Inventors: Manabu Nonaka, Yohzoh Dohki
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Publication number: 20060061645Abstract: An image forming apparatus comprises a guide part guiding transportation of a recording medium after recording by a liquid droplet ejection head at a recording position, the guide part carrying plural spurs for holding the medium on which recording has been made at the recording position, the guide part being movable between a guide position in which the spurs are engaged with the recording medium and a release position in which the spurs are disengaged from the recording medium, wherein there is provided a protective member to the guide part such that the protective member is movable between a protective position protecting the spurs and a retracted position retracted from the spurs.Type: ApplicationFiled: September 13, 2005Publication date: March 23, 2006Inventor: Yohzoh Dohki
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Publication number: 20050265749Abstract: In an image forming device comprising an image forming part forming an image on a recording sheet, a sheet ejection part provided above the image forming part and stacking the recording sheet on which the image is formed by the image forming part, and an image reading part provided above the sheet ejection part and reading an image of an original document, the sheet ejection part is provided with a cover which is capable of being opened or closed to the sheet ejection part.Type: ApplicationFiled: May 25, 2005Publication date: December 1, 2005Inventors: Shoji Asanuma, Shuji Tanaka, Manabu Nonaka, Kazumasa Ishikawa, Taku Kudoh, Hajime Nishida, Akihiro Fujita, Yasuhiro Kawashima, Kenji Kameyama, Yasunobu Youda, Eiki Yoshimizu, Shinichiro Naruse, Yohzoh Dohki, Shigeyuki Ito
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Publication number: 20050254872Abstract: An image forming apparatus includes a reverse conveyance path, a straight conveyance path, a duplex conveyance path, and two branch boards. The reverse conveyance path is used to output a recording sheet face down. The straight conveyance path is used to straight output a recording sheet face up. The duplex conveyance path is used to output a recording sheet on both sides of which images are formed. The two branch boards sandwich the straight conveyance path. At least one of the two branch boards swings at a time to switch to any one of the reverse conveyance path, the straight conveyance path, and the duplex conveyance path.Type: ApplicationFiled: May 10, 2005Publication date: November 17, 2005Inventors: Manabu Nonaka, Yohzoh Dohki
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Publication number: 20050194730Abstract: An inkjet recording apparatus provides an improved printing speed and improved convenience of use. A recording head discharges droplets of a recording liquid onto a paper so as to form an image on the paper. A belt conveyance mechanism has a belt onto which the paper is electrostatically attached. The paper attached onto the belt is conveyed in a direction perpendicular to a carding direction of the paper.Type: ApplicationFiled: March 2, 2005Publication date: September 8, 2005Inventors: Hajime Nishida, Manabu Nonaka, Eiki Yoshimizu, Shinichiro Naruse, Yasuhiro Kawashima, Hideki Sueoka, Tetsu Morino, Kazumasa Ishikawa, Yasunobu Youda, Akihiro Fujita, Shoji Asanuma, Masatoshi Sakakitani, Taku Kudoh, Shigeyuki Ito, Yohzoh Dohki, Koji Watanabe
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Publication number: 20050146554Abstract: A head cleaner is disclosed that includes a blade that has a top face and wipes the nozzle face of a liquid droplet ejecting head that ejects liquid droplets from nozzles, and a cleaning part that cleans the top face of the blade.Type: ApplicationFiled: December 13, 2004Publication date: July 7, 2005Inventors: Shoji Asanuma, Manabu Nonaka, Hajime Nishida, Akihiro Fujita, Eiki Yoshimizu, Shinichiro Naruse, Yasuhiro Kawashima, Taku Kudoh, Kazumasa Ishikawa, Yohzoh Dohki, Shigeyuki Ito