Patents by Inventor Souichi Nakazawa
Souichi Nakazawa 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: 11782417Abstract: A method of manufacturing a 3D modeled object, includes modeling including applying a modeling solution to powder laid in layers, hardening the powder to which the modeling solution applied to form modeling layers, and sequentially stacking the modeling layers to form a 3D modeled object; and immersing the 3D modeled object modeled at the modeling in a removal solution to remove the powder to which the modeling solution is not applied. At the modeling, the modeling solution is applied such that a density of the modeling solution in an inside of the 3D modeled object is smaller than a density of the modeling solution in a surface of the 3D modeled object and an area of the powder to which the modeling solution is applied and an area of the powder to which the modeling solution is not applied are alternate in the inside of the 3D modeled object.Type: GrantFiled: November 15, 2021Date of Patent: October 10, 2023Assignee: RICOH COMPANY, LTD.Inventor: Souichi Nakazawa
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Publication number: 20220155755Abstract: A method of manufacturing a 3D modeled object, includes modeling including applying a modeling solution to powder laid in layers, hardening the powder to which the modeling solution applied to form modeling layers, and sequentially stacking the modeling layers to form a 3D modeled object; and immersing the 3D modeled object modeled at the modeling in a removal solution to remove the powder to which the modeling solution is not applied. At the modeling, the modeling solution is applied such that a density of the modeling solution in an inside of the 3D modeled object is smaller than a density of the modeling solution in a surface of the 3D modeled object and an area of the powder to which the modeling solution is applied and an area of the powder to which the modeling solution is not applied are alternate in the inside of the 3D modeled object.Type: ApplicationFiled: November 15, 2021Publication date: May 19, 2022Inventor: Souichi NAKAZAWA
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Patent number: 10279604Abstract: A printing apparatus includes a plasma treatment unit that performs plasma treatment on a surface of a treatment object to acidify at least the surface of the treatment object; and a recording unit that performs inkjet recording on the surface of the plasma treatment subjected to the plasma treatment by the plasma treatment unit.Type: GrantFiled: December 11, 2017Date of Patent: May 7, 2019Assignee: Ricoh Company, Ltd.Inventors: Junji Nakai, Hiroyoshi Matsumoto, Masakazu Yoshida, Souichi Nakazawa, Tatsuro Watanabe, Hiroyuki Hiratsuka, Koji Nagai
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Publication number: 20180126751Abstract: A printing apparatus includes a plasma treatment unit that performs plasma treatment on a surface of a treatment object to acidify at least the surface of the treatment object; and a recording unit that performs inkjet recording on the surface of the plasma treatment subjected to the plasma treatment by the plasma treatment unit.Type: ApplicationFiled: December 11, 2017Publication date: May 10, 2018Applicant: Ricoh Company, Ltd.Inventors: Junji Nakai, Hiroyoshi Matsumoto, Masakazu Yoshida, Souichi Nakazawa, Tatsuro Watanabe, Hiroyuki Hiratsuka, Koji Nagai
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Patent number: 9873266Abstract: A printing apparatus includes a plasma treatment unit that performs plasma treatment on a surface of a treatment object to acidify at least the surface of the treatment object; and a recording unit that performs inkjet recording on the surface of the plasma treatment subjected to the plasma treatment by the plasma treatment unit.Type: GrantFiled: March 10, 2017Date of Patent: January 23, 2018Assignee: Ricoh Company, Ltd.Inventors: Junji Nakai, Hiroyoshi Matsumoto, Masakazu Yoshida, Souichi Nakazawa, Tatsuro Watanabe, Hiroyuki Hiratsuka, Koji Nagai
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Publication number: 20170182799Abstract: A printing apparatus includes a plasma treatment unit that performs plasma treatment on a surface of a treatment object to acidify at least the surface of the treatment object; and a recording unit that performs inkjet recording on the surface of the plasma treatment subjected to the plasma treatment by the plasma treatment unit.Type: ApplicationFiled: March 10, 2017Publication date: June 29, 2017Applicant: Ricoh Company, Ltd.Inventors: Junji Nakai, Hiroyoshi Matsumoto, Masakazu Yoshida, Souichi Nakazawa, Tatsuro Watanabe, Hiroyuki Hiratsuka, Koji Nagai
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Patent number: 9623677Abstract: A printing apparatus includes a plasma treatment unit that performs plasma treatment on a surface of a treatment object to acidify at least the surface of the treatment object; and a recording unit that performs inkjet recording on the surface of the plasma treatment subjected to the plasma treatment by the plasma treatment unit.Type: GrantFiled: January 5, 2016Date of Patent: April 18, 2017Assignee: Ricoh Company, Ltd.Inventors: Junji Nakai, Hiroyoshi Matsumoto, Masakazu Yoshida, Souichi Nakazawa, Tatsuro Watanabe, Hiroyuki Hiratsuka, Koji Nagai
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Publication number: 20160167402Abstract: A printing apparatus includes a plasma treatment unit that performs plasma treatment on a surface of a treatment object to acidify at least the surface of the treatment object; and a recording unit that performs inkjet recording on the surface of the plasma treatment subjected to the plasma treatment by the plasma treatment unit.Type: ApplicationFiled: January 5, 2016Publication date: June 16, 2016Applicant: Ricoh Company, Ltd.Inventors: Junji Nakai, Hiroyoshi Matsumoto, Masakazu Yoshida, Souichi Nakazawa, Tatsuro Watanabe, Hiroyuki Hiratsuka, Koji Nagai
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Patent number: 9259924Abstract: A printing apparatus includes a plasma treatment unit that performs plasma treatment on a surface of a treatment object to acidify at least the surface of the treatment object; and a recording unit that performs inkjet recording on the surface of the plasma treatment subjected to the plasma treatment by the plasma treatment unit.Type: GrantFiled: September 17, 2013Date of Patent: February 16, 2016Assignee: Ricoh Company, Ltd.Inventors: Junji Nakai, Hiroyoshi Matsumoto, Masakazu Yoshida, Souichi Nakazawa, Tatsuro Watanabe, Hiroyuki Hiratsuka, Koji Nagai
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Publication number: 20140078212Abstract: A printing apparatus includes a plasma treatment unit that performs plasma treatment on a surface of a treatment object to acidify at least the surface of the treatment object; and a recording unit that performs inkjet recording on the surface of the plasma treatment subjected to the plasma treatment by the plasma treatment unit.Type: ApplicationFiled: September 17, 2013Publication date: March 20, 2014Inventors: Junji Nakai, Tatsuro Watanabe, Hiroyuki Hiratsuka, Koji Nagai, Masakazu Yoshida, Souichi Nakazawa, Hiroyoshi Matsumoto
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Patent number: 8406667Abstract: A fixing device includes: a fixing member that fixes a toner image onto a recording medium; a pressing member that presses the recording medium against the fixing member; an oiling unit that applies release oil onto a surface of the fixing member to clean the surface; a removing member that is arranged between an downstream side of the oiling unit and an upstream side of the pressing member in a rotating direction of the fixing member and movable between an in-contact state where the removing member is in contact with the surface of the fixing member and an out-of-contact state where the removing member is out of contact with the surface; a drive unit that drives the removing member; and an oiling control unit that, when starting earliest fixing, controls the drive unit to gradually move the removing member from the in-contact state into the out-of-contact state.Type: GrantFiled: September 27, 2010Date of Patent: March 26, 2013Assignee: Ricoh Company, LimitedInventors: Makoto Yagawara, Tsukasa Onose, Souichi Nakazawa, Sho Sawahata, Ken Onodera, Masahiro Mizuno, Soushi Kikuchi, Takahiro Inoue
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Patent number: 8091476Abstract: By executing low-speed conveyance of web by a web feeding mechanism before the printing operation begins, slack W22a, W10a, and W15a in the web located downstream of the guide rollers, and the slacked web is accumulated in the air loop portion, thereby completing the standby for printing. At that time, the amount of web conveyance (accumulation) is saved. Then, high-speed printing operation begins, and when the amount of printing has reached the amount of web conveyance saved, high-speed conveyance by the web feeding mechanism begins.Type: GrantFiled: January 15, 2008Date of Patent: January 10, 2012Assignee: Ricoh Company, Ltd.Inventors: Souichi Nakazawa, Yuji Ohmura, Toru Kikuchi, Sho Sawahata
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Publication number: 20110076069Abstract: A fixing device includes: a fixing member that fixes a toner image onto a recording medium; a pressing member that presses the recording medium against the fixing member; an oiling unit that applies release oil onto a surface of the fixing member to clean the surface; a removing member that is arranged between an downstream side of the oiling unit and an upstream side of the pressing member in a rotating direction of the fixing member and movable between an in-contact state where the removing member is in contact with the surface of the fixing member and an out-of-contact state where the removing member is out of contact with the surface; a drive unit that drives the removing member; and an oiling control unit that, when starting earliest fixing, controls the drive unit to gradually move the removing member from the in-contact state into the out-of-contact state.Type: ApplicationFiled: September 27, 2010Publication date: March 31, 2011Inventors: Makoto YAGAWARA, Tsukasa Onose, Souichi Nakazawa, Sho Sawahata, Ken Onodera, Masahiro Mizuno, Soushi Kikuchi, Takahiro Inoue
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Patent number: 7917045Abstract: An image forming apparatus forms high precision full color image by correcting the adhesion quantity of an image visualizing agent and a position shift of a visible image while performing printing process. The image forming apparatus includes an intermediate transfer unit; plural photoconductors; plural charging units; plural exposure units; plural developing units; plural first transferring units; and plural second transferring units. The intermediate transfer unit has a correction pattern image formed in a region outside a predetermined maximum document region in a direction perpendicular to the moving direction. A detector in the intermediate transfer unit detects the correction pattern image. A correction controller performs correcting, based on detection results of the detector, setting values of one or more of the charging units, the exposure units, and the developing units when a region corresponding to an interval between the visible images passes a position beneath one of the units.Type: GrantFiled: March 5, 2007Date of Patent: March 29, 2011Assignee: Ricoh Company, Ltd.Inventors: Makoto Yagawara, Hideharu Miki, Souichi Nakazawa, Shinichi Akatsu, Akira Asaoka, Akihiko Yamazaki, Isao Nakajima
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Patent number: 7773896Abstract: According to one embodiment, an image forming apparatus includes an image carrier, a image forming unit, a measurement unit and a controller. The image carrier includes a central region on which a target image as an object of an image forming is formed and a peripheral region placed outward of the central region. The image forming unit forms a reference image on the peripheral region and the central region, before the image forming is started. Also, the image forming unit forms the target image on the central region based on a preset condition and a third reference image on the peripheral region, during the image forming. The measurement unit measures a physical quantity for the reference images.Type: GrantFiled: May 31, 2007Date of Patent: August 10, 2010Assignee: Ricoh Company, Ltd.Inventors: Makoto Yagawara, Hideharu Miki, Isao Nakajima, Akihiko Yamazaki, Akira Asaoka, Yukio Otome, Souichi Nakazawa
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Patent number: 7552995Abstract: An operator sets a distance from the page head of an alignment mark using a mark position setting switch mounted in a duplex printing system. A first printer forms the alignment mark in a position of the distance from the page head of a web, and reports position information about the alignment mark to a second printer. The alignment mark is detected by mark detection means of the second printer. Control means performs control of a web transport speed so that a phase between generation timing of a mark detection signal which the mark detection means generates by detecting the alignment mark and control timing calculated from alignment mark position data, alignment mark interval data and a web feed control signal generated at a preset period becomes constant.Type: GrantFiled: January 21, 2005Date of Patent: June 30, 2009Assignee: Ricoh Company, Ltd.Inventors: Souichi Nakazawa, Takahiro Inoue, Atsushi Miyamoto, Masahiro Mizuno
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Publication number: 20080181710Abstract: A tandem printing system that can achieve stable web conveyance, regardless of the configuration of a tandem printing system or the type of a web, by preventing malfunctions including a broken web that may occur when slack in a web occurs at the time the printing operation stops and the slack is then eliminated after the printing operation has started. By executing low-speed conveyance of web by a web feeding mechanism before the printing operation begins, slack W22a, W10a, and W15a in the web located downstream of the guide rollers, and the slacked web is accumulated in the air loop portion, thereby completing the standby for printing. At that time, the amount of web conveyance (accumulation) is saved. Then, high-speed printing operation begins, and when the amount of printing has reached the amount of web conveyance saved, high-speed conveyance by the web feeding mechanism begins.Type: ApplicationFiled: January 15, 2008Publication date: July 31, 2008Inventors: Souichi Nakazawa, Yuji Ohmura, Toru Kikuchi, Sho Sawahata
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Publication number: 20080044192Abstract: According to one embodiment, an image forming apparatus includes an image carrier, a image forming unit, a measurement unit and a controller. The image carrier includes a central region on which a target image as an object of an image forming is formed and a peripheral region placed outward of the central region. The image forming unit forms a reference image on the peripheral region and the central region, before the image forming is started. Also, the image forming unit forms the target image on the central region based on a preset condition and a third reference image on the peripheral region, during the image forming. The measurement unit measures a physical quantity for the reference images.Type: ApplicationFiled: May 31, 2007Publication date: February 21, 2008Applicant: RICOH PRINTING SYSTEMS, LTD.Inventors: Makoto Yagawara, Hideharu Miki, Isao Nakajima, Akihiko Yamazaki, Akira Asaoka, Yukio Otome, Souichi Nakazawa
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Publication number: 20070212086Abstract: An image forming apparatus is disclosed that is able to form a full color image with high precision by correcting the adhesion quantity of an image visualizing agent and a position shift of a visible image while continuing to perform a printing process. The image forming apparatus includes an intermediate transfer unit; plural photoconductors; plural charging units; plural exposure units; plural developing units; plural first transferring units; and plural second transferring units. The intermediate transfer unit has a correction pattern image formed in a region outside of a predetermined maximum document region of the intermediate transfer unit in a direction perpendicular to the moving direction. A detector is provided in the intermediate transfer unit for detecting the correction pattern image.Type: ApplicationFiled: March 5, 2007Publication date: September 13, 2007Inventors: Makoto YAGAWARA, Hideharu MIKI, Souichi NAKAZAWA, Shinichi AKATSU, Akira ASAOKA, Akihiko YAMAZAKI, Isao NAKAJIMA
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Patent number: 7079803Abstract: A controller outputs a PRE CPF-N signal and a CPF-N signal following the PRE CPF-N signal to an electrophotographic printer. The electrophotographic printer 1 starts a predetermined preparation process in response to the PRE CPF-N signal, and starts irradiation in response to the CPF-N signal. The preparation process completes by the time of when a toner image for a first page formed on a photosensitive drum reaches a transfer point where the toner image is transferred onto a recording medium.Type: GrantFiled: March 28, 2003Date of Patent: July 18, 2006Assignees: Ricoh Printing Systems, Ltd., Hitachi Printing Solutions, Ltd.Inventors: Soushi Kikuchi, Souichi Nakazawa, Masahiro Mizuno