Patents by Inventor Kyohei Matsumura
Kyohei Matsumura 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: 11934112Abstract: An image forming apparatus includes an apparatus body, a developer container, a data recording medium, a contact terminal, a detector, and control circuitry. The developer container is detachably attached in the apparatus body. The data recording medium is on the developer container. The contact terminal is disposed in the apparatus body and contacts the data recording medium. The detector detects a communication failure between the data recording medium and the apparatus body. The control circuitry executes a control mode to vibrate the data recording medium when the detector detects the communication failure.Type: GrantFiled: October 21, 2022Date of Patent: March 19, 2024Assignee: RICOH COMPANY, LTD.Inventors: Susumu Miyazaki, Munenori Kimura, Tetsuya Yano, Kyohei Matsumura
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Patent number: 11912036Abstract: An ink tank that enables to check whether a cover of an ink tank is normally bonded to the ink tank includes a first chamber having a supply port for supplying ink to a printing head that ejects ink, a second chamber having an external air introduction port capable of introducing external air, a partition wall configured to separate the first chamber and the second chamber, a communication path provided in the partition wall and configured to place the first chamber and the second chamber in communication with each other, a first cover member configured to cover an opening of the first chamber without extending over an opening of the second chamber, and a second cover member configured to cover the opening of the second chamber without extending over the opening of the first chamber.Type: GrantFiled: September 29, 2021Date of Patent: February 27, 2024Assignee: CANON KABUSHIKI KAISHAInventors: Koki Shimada, Hideaki Matsumura, Masaya Shimmachi, Yukimichi Kimura, Junichi Kubokawa, Takahiro Kiuchi, Yusuke Tanaka, Kyohei Sato
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Publication number: 20230152733Abstract: An image forming apparatus includes an apparatus body, a developer container, a data recording medium, a contact terminal, a detector, and control circuitry. The developer container is detachably attached in the apparatus body. The data recording medium is on the developer container. The contact terminal is disposed in the apparatus body and contacts the data recording medium. The detector detects a communication failure between the data recording medium and the apparatus body. The control circuitry executes a control mode to vibrate the data recording medium when the detector detects the communication failure.Type: ApplicationFiled: October 21, 2022Publication date: May 18, 2023Inventors: Susumu MIYAZAKI, Munenori KIMURA, Tetsuya YANO, Kyohei MATSUMURA
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Patent number: 11490518Abstract: A wiring board includes a substrate and a plurality of monolithic ceramic capacitors connected in series on the substrate. The plurality of monolithic ceramic capacitors includes a first monolithic ceramic capacitor oriented in a first direction and a second monolithic ceramic capacitor oriented in a second direction. The second direction is at an angle of 45±5 degrees relative to the first direction.Type: GrantFiled: July 15, 2020Date of Patent: November 1, 2022Assignee: RICOH COMPANY, LTD.Inventor: Kyohei Matsumura
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Publication number: 20210120673Abstract: A wiring board includes a substrate and a plurality of monolithic ceramic capacitors connected in series on the substrate. The plurality of monolithic ceramic capacitors includes a first monolithic ceramic capacitor oriented in a first direction and a second monolithic ceramic capacitor oriented in a second direction. The second direction is at an angle of 45±5 degrees relative to the first direction.Type: ApplicationFiled: July 15, 2020Publication date: April 22, 2021Inventor: Kyohei MATSUMURA
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Patent number: 10955374Abstract: A characteristic detector includes two electrodes facing each other to form a passage through which a medium passes, a cover disposed between the two electrodes, a current generator to supply a current between the two electrodes, a capacitance gauge to measure a capacitance generated between the two electrodes, and circuitry. The two electrodes have a shape or an arrangement in which at least two points on a leading end of the medium enter the passage with a time lag. The cover covers one of the two electrodes in connection with a size of the medium. The capacitance gauge detects the size of the medium based on the measured capacitance. The circuitry calculates a characteristic of the medium based on the capacitance measured by the capacitance gauge and the size of the medium detected by the capacitance gauge.Type: GrantFiled: October 18, 2018Date of Patent: March 23, 2021Assignee: Ricoh Company, Ltd.Inventors: Yohei Kushida, Kyohei Matsumura, Ryuuichi Satoh, Sumihiro Inokuchi, Tomohide Kondoh, Ryohta Ueba
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Publication number: 20190212289Abstract: A characteristic detector includes two electrodes facing each other to form a passage through which a medium passes, a cover disposed between the two electrodes, a current generator to supply a current between the two electrodes, a capacitance gauge to measure a capacitance generated between the two electrodes, and circuitry. The two electrodes have a shape or an arrangement in which at least two points on a leading end of the medium enter the passage with a time lag. The cover covers one of the two electrodes in connection with a size of the medium. The capacitance gauge detects the size of the medium based on the measured capacitance. The circuitry calculates a characteristic of the medium based on the capacitance measured by the capacitance gauge and the size of the medium detected by the capacitance gauge.Type: ApplicationFiled: October 18, 2018Publication date: July 11, 2019Inventors: Yohei Kushida, Kyohei Matsumura, Ryuuichi Satoh, Sumihiro Inokuchi, Tomohide Kondoh, Ryohta Ueba
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Patent number: 9221264Abstract: An image forming apparatus is provided, that includes a recording head including a plurality of nozzles to discharge droplets; and a droplet discharge sensor unit to detect whether a droplet has been discharged from the plurality of nozzles of the recording head or not. The droplet discharge sensor unit includes a resistor, on which the droplets discharged from the nozzles of the recording head lands, the resistor disposed opposite the recording head; and a sensor to detect a change in electrical resistance of the resistor when the droplets discharged from the plurality of nozzles of the recording head landed on the resistor.Type: GrantFiled: July 11, 2014Date of Patent: December 29, 2015Assignee: RICOH COMPANY, LTD.Inventors: Shotaro Takeuchi, Shingo Masaoka, Masahiko Hisada, Kyohei Matsumura
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Publication number: 20150062223Abstract: An image forming apparatus is provided, that includes a recording head including a plurality of nozzles to discharge droplets; and a droplet discharge sensor unit to detect whether a droplet has been discharged from the plurality of nozzles of the recording head or not. The droplet discharge sensor unit includes a resistor, on which the droplets discharged from the nozzles of the recording head lands, the resistor disposed opposite the recording head; and a sensor to detect a change in electrical resistance of the resistor when the droplets discharged from the plurality of nozzles of the recording head landed on the resistor.Type: ApplicationFiled: July 11, 2014Publication date: March 5, 2015Applicant: RICOH COMPANY, LTD.Inventors: Shotaro Takeuchi, Shingo MASAOKA, Masahiko HISADA, Kyohei MATSUMURA
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Patent number: 8967759Abstract: An image forming apparatus includes a recording head, an ejection detection unit, a cleaner, and a holder member. The ejection detection unit has an electrode member disposed in an area in which the electrode member is opposable to the head. The cleaner includes a cleaning member to remove droplets adhering to the electrode member. The ejection detection unit detects ejection or non-ejection of droplets by detection of electric changes of the electrode member generated when droplets ejected from nozzles of the head land on the electrode member in a state in which a potential difference is created between a nozzle face of the head and the electrode member and the nozzle face is opposed to the electrode member. The holder member supports the electrode member, and holds the cleaning member movable in parallel to a nozzle array direction in which the nozzles is arrayed in the head.Type: GrantFiled: February 26, 2014Date of Patent: March 3, 2015Assignee: Ricoh Company, Ltd.Inventors: Shingo Masaoka, Shotaro Takeuchi, Masahiko Hisada, Kyohei Matsumura
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Publication number: 20140253626Abstract: An image forming apparatus includes a recording head, an ejection detection unit, a cleaner, and a holder member. The ejection detection unit has an electrode member disposed in an area in which the electrode member is opposable to the head. The cleaner includes a cleaning member to remove droplets adhering to the electrode member. The ejection detection unit detects ejection or non-ejection of droplets by detection of electric changes of the electrode member generated when droplets ejected from nozzles of the head land on the electrode member in a state in which a potential difference is created between a nozzle face of the head and the electrode member and the nozzle face is opposed to the electrode member. The holder member supports the electrode member, and holds the cleaning member movable in parallel to a nozzle array direction in which the nozzles is arrayed in the head.Type: ApplicationFiled: February 26, 2014Publication date: September 11, 2014Applicant: RICOH COMPANY, LTD.Inventors: Shingo Masaoka, Shotaro Takeuchi, Masahiko Hisada, Kyohei Matsumura