Patents by Inventor Yuuji OHMURA
Yuuji OHMURA 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: 11279155Abstract: A conveyance control device is configured to control conveyance of a sheet-shaped recording medium onto which a liquid is discharged by a liquid discharge device. The conveyance control device includes a conveyance driving roller, a non-contact conveyor, and processing circuitry. The conveyance driving roller is configured to control a conveyance speed of the recording medium. The non-contact conveyor includes a non-contact conveyance roller that constitutes part of a conveyance path of the recording medium. The non-contact conveyance roller has an outer peripheral surface in a non-contact state with the recording medium during conveyance of the recording medium. The processing circuitry is configured to control at least one of an operation of the conveyance driving roller and an operation of the non-contact conveyance roller such that a speed of the outer peripheral surface of the non-contact conveyance roller becomes a prescribed speed faster than the conveyance speed of the recording medium.Type: GrantFiled: March 9, 2020Date of Patent: March 22, 2022Assignee: RICOH COMPANY, LTD.Inventor: Yuuji Ohmura
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Publication number: 20200290378Abstract: A conveyance control device is configured to control conveyance of a sheet-shaped recording medium onto which a liquid is discharged by a liquid discharge device. The conveyance control device includes a conveyance driving roller, a non-contact conveyor, and processing circuitry. The conveyance driving roller is configured to control a conveyance speed of the recording medium. The non-contact conveyor includes a non-contact conveyance roller that constitutes part of a conveyance path of the recording medium. The non-contact conveyance roller has an outer peripheral surface in a non-contact state with the recording medium during conveyance of the recording medium. The processing circuitry is configured to control at least one of an operation of the conveyance driving roller and an operation of the non-contact conveyance roller such that a speed of the outer peripheral surface of the non-contact conveyance roller becomes a prescribed speed faster than the conveyance speed of the recording medium.Type: ApplicationFiled: March 9, 2020Publication date: September 17, 2020Applicant: Ricoh Company, Ltd.Inventor: Yuuji OHMURA
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Patent number: 10596833Abstract: A conveying device includes a rotator, a drier, and a conveyance direction changer. The rotator winds a web-shaped recording medium around a predetermined region of an outer peripheral surface of the rotator with one side of the web-shaped recording medium facing outward and conveys the recording medium with rotation. The drier is disposed downstream from the rotator in a direction of conveyance of the recording medium, to dry and convey the recording medium. The conveyance direction changer is disposed on a conveyance path of the recording medium between the rotator and the drier. The conveyance direction changer has an outer peripheral surface that includes an opposed region opposed to the one side of the recording medium. The opposed region has openings to blow gas toward the one side of the recording medium. The rotator and the drier are disposed at positions not overlapping with each other in a plan view.Type: GrantFiled: July 18, 2018Date of Patent: March 24, 2020Assignee: Ricoh Company, Ltd.Inventors: Yasushi Hashimoto, Satoshi Takanashi, Genichiro Kawamichi, Hironobu Murai, Yuuji Ohmura
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Publication number: 20190047298Abstract: A conveying device includes a rotator, a drier, and a conveyance direction changer. The rotator winds a web-shaped recording medium around a predetermined region of an outer peripheral surface of the rotator with one side of the web-shaped recording medium facing outward and conveys the recording medium with rotation. The drier is disposed downstream from the rotator in a direction of conveyance of the recording medium, to dry and convey the recording medium. The conveyance direction changer is disposed on a conveyance path of the recording medium between the rotator and the drier. The conveyance direction changer has an outer peripheral surface that includes an opposed region opposed to the one side of the recording medium. The opposed region has openings to blow gas toward the one side of the recording medium. The rotator and the drier are disposed at positions not overlapping with each other in a plan view.Type: ApplicationFiled: July 18, 2018Publication date: February 14, 2019Applicant: Ricoh Company, Ltd.Inventors: Yasushi Hashimoto, Satoshi Takanashi, Genichiro Kawamichi, Hironobu Murai, Yuuji Ohmura
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Patent number: 9889679Abstract: An application device includes a conveyer to convey a recording medium, an application roller to apply a treatment liquid to the recording medium, a pressure roller to sandwich the recording medium with the application roller to press the recording medium against the application roller, and a winding member to form a curved conveying path to have the recording medium curved along a conveying direction to wind the recording medium around the pressure roller. The pressure roller comes in contact with the application roller when applying the treatment liquid and separates from the application roller when not applying the treatment liquid. A predetermined positional relationship is maintained between the pressure roller and the winding member while the pressure roller moves close to the application roller to be in contact with the application roller, or the pressure roller moves away from the application roller to be separated from the application roller.Type: GrantFiled: December 2, 2016Date of Patent: February 13, 2018Assignee: RICOH COMPANY, LTD.Inventors: Akitomo Kuwabara, Kazuhiro Akatsu, Yutaka Nagasawa, Yuuji Ohmura, Hirotaka Kobayashi, Hirofumi Ohkushi
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Patent number: 9798278Abstract: A recording medium heating device that can heat and dry a continuous recording medium, includes multiple heating rollers, including respective heaters, disposed on a conveying path of the recording medium; and a controller to control the heaters of the heating rollers. In a starting period during which the recording medium heating device is started, the controller sets temperatures of the heaters to starting temperatures where a temperature of a heating roller positioned closest to an exit side of the conveying path is lower than a temperature of a heating roller positioned away from the exit side of the conveying path.Type: GrantFiled: May 28, 2015Date of Patent: October 24, 2017Assignee: RICOH COMPANY, LTD.Inventors: Shinji Nagayama, Takashi Ebihara, Genichiro Kawamichi, Yuuji Ohmura, Kahei Nakamura
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Publication number: 20170165981Abstract: An application device includes a conveyer to convey a recording medium, an application roller to apply a treatment liquid to the recording medium, a pressure roller to sandwich the recording medium with the application roller to press the recording medium against the application roller, and a winding member to form a curved conveying path to have the recording medium curved along a conveying direction to wind the recording medium around the pressure roller. The pressure roller comes in contact with the application roller when applying the treatment liquid and separates from the application roller when not applying the treatment liquid. A predetermined positional relationship is maintained between the pressure roller and the winding member while the pressure roller moves close to the application roller to be in contact with the application roller, or the pressure roller moves away from the application roller to be separated from the application roller.Type: ApplicationFiled: December 2, 2016Publication date: June 15, 2017Applicant: RICHO COMPANY, LTD.Inventors: Akitomo Kuwabara, Kazuhiro Akatsu, Yutaka Nagasawa, Yuuji Ohmura, Hirotaka Kobayashi, Hirofumi Ohkushi
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Patent number: 9616682Abstract: There is provided a process liquid coating apparatus comprising: a recording medium conveyance unit configured to convey a recording medium; a coating roller configured to rotate in accordance with the conveyed recording medium to apply process liquid on a surface of the recording medium; a pressure roller configured to cause the coating roller to apply the process liquid on the surface of the recording medium by forming an abutment part for nipping and pressing the recording medium with the coating roller; and a winding member configured to form a bent conveyance path along which the recording medium is bent with respect to a conveyance direction so that the recording medium is wound around the surface of the pressure roller, wherein the winding member is disposed adjacent to the pressure roller.Type: GrantFiled: February 9, 2016Date of Patent: April 11, 2017Assignee: Ricoh Company, Ltd.Inventors: Kazuhiro Akatsu, Yutaka Nagasawa, Akitomo Kuwabara, Yuuji Ohmura, Hirofumi Ohkushi, Hirotaka Kobayashi, Sho Sawahata
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Publication number: 20160263913Abstract: There is provided a process liquid coating apparatus comprising: a recording medium conveyance unit configured to convey a recording medium; a coating roller configured to rotate in accordance with the conveyed recording medium to apply process liquid on a surface of the recording medium; a pressure roller configured to cause the coating roller to apply the process liquid on the surface of the recording medium by forming an abutment part for nipping and pressing the recording medium with the coating roller; and a winding member configured to form a bent conveyance path along which the recording medium is bent with respect to a conveyance direction so that the recording medium is wound around the surface of the pressure roller, wherein the winding member is disposed adjacent to the pressure roller.Type: ApplicationFiled: February 9, 2016Publication date: September 15, 2016Applicant: RICOH COMPANY, LTD.Inventors: Kazuhiro AKATSU, Yutaka NAGASAWA, Akitomo KUWABARA, Yuuji OHMURA, Hirofumi OHKUSHI, Hirotaka KOBAYASHI, Sho SAWAHATA
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Patent number: 9375958Abstract: An image forming apparatus includes a sheet feed conveying unit having an outlet for a recording medium on one side; at least one image forming unit having an inlet for the recording medium on one side and an outlet for the recording medium on the other side; and a sheet eject conveying unit having an inlet for the recording medium on one side, wherein the sheet feed conveying unit, the image forming unit, and the sheet eject conveying unit are arranged along a conveying direction of the recording medium; the outlet of the sheet feed conveying unit matches the inlet of the image forming unit; the outlet of the image forming unit matches the inlet of the sheet eject conveying unit; and the sheet feed conveying unit, the image forming unit, and the sheet eject conveying unit are connected to each other in a separable manner.Type: GrantFiled: September 12, 2014Date of Patent: June 28, 2016Assignee: RICOH COMPANY, LTD.Inventors: Yuuji Ohmura, Yasushi Hashimoto, Yoshikane Matsumoto
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Patent number: 9259947Abstract: An image forming apparatus includes a sheet feed conveying unit having an outlet for a recording medium on one side; at least one image forming unit having an inlet for the recording medium on one side and an outlet for the recording medium on the other side; and a sheet eject conveying unit having an inlet for the recording medium on one side, wherein the sheet feed conveying unit, the image forming unit, and the sheet eject conveying unit are arranged along a conveying direction of the recording medium; the outlet of the sheet feed conveying unit matches the inlet of the image forming unit; the outlet of the image forming unit matches the inlet of the sheet eject conveying unit; and the sheet feed conveying unit, the image forming unit, and the sheet eject conveying unit are connected to each other in a separable manner.Type: GrantFiled: October 20, 2009Date of Patent: February 16, 2016Assignee: RICOH COMPANY, LTD.Inventors: Yuuji Ohmura, Yasushi Hashimoto, Yoshikane Matsumoto
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Publication number: 20150346659Abstract: A recording medium heating device that can heat and dry a continuous recording medium, includes multiple heating rollers, including respective heaters, disposed on a conveying path of the recording medium; and a controller to control the heaters of the heating rollers. In a starting period during which the recording medium heating device is started, the controller sets temperatures of the heaters to starting temperatures where a temperature of a heating roller positioned closest to an exit side of the conveying path is lower than a temperature of a heating roller positioned away from the exit side of the conveying path.Type: ApplicationFiled: May 28, 2015Publication date: December 3, 2015Inventors: Shinji NAGAYAMA, Takashi Ebihara, Genichiro Kawamichi, Yuuji Ohmura, Kahei Nakamura
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Patent number: 9150374Abstract: A dancer roller apparatus is disclosed. The apparatus includes a dancer roller; a drive motor; and a dancer roller position changing unit, wherein the dancer roller position changing unit is provided with a one way clutch which allows the dancer roller to move in a long object slack direction, and wherein the drive motor is caused to rotate in a direction such that the dancer roller moves the one way clutch in a long object stretching direction during conveying of a long object.Type: GrantFiled: April 18, 2013Date of Patent: October 6, 2015Assignee: Ricoh Company, Ltd.Inventor: Yuuji Ohmura
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Patent number: 9025978Abstract: An image forming apparatus includes an image holding body on which a toner image is formed; a transfer unit that functions to transfer the toner image formed on the image holding body onto a recording medium; and an adjusting unit that adjusts a gap between the transfer unit and the image holding body based on the rigidity of the recording medium, the recording medium being conveyed through the gap with respect to the image holding body.Type: GrantFiled: May 23, 2012Date of Patent: May 5, 2015Assignee: Ricoh Company, Ltd.Inventor: Yuuji Ohmura
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Publication number: 20140375741Abstract: An image forming apparatus includes a sheet feed conveying unit having an outlet for a recording medium on one side; at least one image forming unit having an inlet for the recording medium on one side and an outlet for the recording medium on the other side; and a sheet eject conveying unit having an inlet for the recording medium on one side, wherein the sheet feed conveying unit, the image forming unit, and the sheet eject conveying unit are arranged along a conveying direction of the recording medium; the outlet of the sheet feed conveying unit matches the inlet of the image forming unit; the outlet of the image forming unit matches the inlet of the sheet eject conveying unit; and the sheet feed conveying unit, the image forming unit, and the sheet eject conveying unit are connected to each other in a separable manner.Type: ApplicationFiled: September 12, 2014Publication date: December 25, 2014Applicant: RICOH COMPANY, LTD.Inventors: Yuuji OHMURA, Yasushi HASHIMOTO, Yoshikane MATSUMOTO
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Patent number: 8870328Abstract: An image forming apparatus includes a sheet feed conveying unit having an outlet for a recording medium on one side; at least one image forming unit having an inlet for the recording medium on one side and an outlet for the recording medium on the other side; and a sheet eject conveying unit having an inlet for the recording medium on one side, wherein the sheet feed conveying unit, the image forming unit, and the sheet eject conveying unit are arranged along a conveying direction of the recording medium; the outlet of the sheet feed conveying unit matches the inlet of the image forming unit; the outlet of the image forming unit matches the inlet of the sheet eject conveying unit; and the sheet feed conveying unit, the image forming unit, and the sheet eject conveying unit are connected to each other in a separable manner.Type: GrantFiled: March 15, 2013Date of Patent: October 28, 2014Assignee: Ricoh Company, Ltd.Inventors: Yuuji Ohmura, Yasushi Hashimoto, Yoshikane Matsumoto
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Patent number: 8613253Abstract: A printing apparatus including: a web conveyance unit that conveys a web; a printing unit that prints an image on the web; a web discharging unit that discharges the web on which the image is formed with the printing unit, the web discharging unit being placed downstream of the printing unit; and a web withdrawal unit that withdraws the web into the printing apparatus, the web withdrawal unit including a web withdrawal roller and at least one pressing roller. When the printing apparatus is in a print waiting state, the printing apparatus drives the web withdrawal roller intermittently, while a pressing force from the at least one of the pressing roller is maintained, so as to convey the web intermittently.Type: GrantFiled: December 6, 2011Date of Patent: December 24, 2013Assignee: Ricoh Company, Ltd.Inventor: Yuuji Ohmura
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Publication number: 20130277487Abstract: A dancer roller apparatus is disclosed. The apparatus includes a dancer roller; a drive motor; and a dancer roller position changing unit, wherein the dancer roller position changing unit is provided with a one way clutch which allows the dancer roller to move in a long object slack direction, and wherein the drive motor is caused to rotate in a direction such that the dancer roller moves the one way clutch in a long object stretching direction during conveying of a long object.Type: ApplicationFiled: April 18, 2013Publication date: October 24, 2013Inventor: Yuuji OHMURA
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Publication number: 20130201267Abstract: An image forming apparatus includes a sheet feed conveying unit having an outlet for a recording medium on one side; at least one image forming unit having an inlet for the recording medium on one side and an outlet for the recording medium on the other side; and a sheet eject conveying unit having an inlet for the recording medium on one side, wherein the sheet feed conveying unit, the image forming unit, and the sheet eject conveying unit are arranged along a conveying direction of the recording medium; the outlet of the sheet feed conveying unit matches the inlet of the image forming unit; the outlet of the image forming unit matches the inlet of the sheet eject conveying unit; and the sheet feed conveying unit, the image forming unit, and the sheet eject conveying unit are connected to each other in a separable manner.Type: ApplicationFiled: March 15, 2013Publication date: August 8, 2013Applicant: RICOH COMPANY, LTD.Inventors: Yuuji OHMURA, Yasushi HASHIMOTO, Yoshikane MATSUMOTO
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Publication number: 20120300235Abstract: An image forming apparatus includes an image holding body on which a toner image is formed; a transfer unit that functions to transfer the toner image formed on the image holding body onto a recording medium; and an adjusting unit that adjusts a gap between the transfer unit and the image holding body based on the rigidity of the recording medium, the recording medium being conveyed through the gap with respect to the image holding body.Type: ApplicationFiled: May 23, 2012Publication date: November 29, 2012Applicant: RICOH COMPANY, LTD.Inventor: Yuuji OHMURA