Patents by Inventor Takeroh Kurenuma
Takeroh Kurenuma 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: 9753401Abstract: A powder container includes a rotatable powder storage to store powder for image formation, a conveyor to transport the powder inside the powder storage, and a scooping portion to scoop the powder inside the powder storage. The conveyor transports the powder in a powder conveyance direction parallel to a rotation axis of the powder storage toward an opening at one end of the powder storage. The scooping portion causes the powder to flow to the opening. The scooping portion includes a scooping face extending from an inner face of the powder storage toward the rotation axis of the powder storage, and a rim disposed along an inner end of the scooping face in a diameter direction of the powder storage, and at least a portion of the rim protruding downstream beyond the scooping face in a rotation direction of the powder storage.Type: GrantFiled: June 14, 2016Date of Patent: September 5, 2017Assignee: Ricoh Company, Ltd.Inventors: Masayuki Yamane, Takeroh Kurenuma, Masahiro Watanabe
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Publication number: 20160378021Abstract: A powder container includes a rotatable powder storage to store powder for image formation, a conveyor to transport the powder inside the powder storage, and a scooping portion to scoop the powder inside the powder storage. The conveyor transports the powder in a powder conveyance direction parallel to a rotation axis of the powder storage toward an opening at one end of the powder storage. The scooping portion causes the powder to flow to the opening. The scooping portion includes a scooping face extending from an inner face of the powder storage toward the rotation axis of the powder storage, and a rim disposed along an inner end of the scooping face in a diameter direction of the powder storage, and at least a portion of the rim protruding downstream beyond the scooping face in a rotation direction of the powder storage.Type: ApplicationFiled: June 14, 2016Publication date: December 29, 2016Inventors: Masayuki YAMANE, Takeroh KURENUMA, Masahiro WATANABE
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Patent number: 8160461Abstract: A toner container detachably attached to a toner-container holder of a main body of an image forming apparatus includes a container body that includes an opening, and discharges toner contained in the container body, from the opening; and a held portion that is held by the toner-container holder in a non-rotating manner. The held portion includes an open/close member for opening/closing the toner outlet in synchronization with an attachment/detachment operation of the held portion to/from the toner-container holder.Type: GrantFiled: September 20, 2010Date of Patent: April 17, 2012Assignee: Ricoh Co., Ltd.Inventors: Nobuyuki Taguchi, Goro Katsuyama, Takeroh Kurenuma, Hideo Yoshizawa, Masayuki Yamane
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Patent number: 8145100Abstract: A process cartridge for use in an image forming apparatus includes an image bearing member and a developing unit. The developing unit includes a developer bearing member to bear developer including toner and carrier, a casing forming a developer container containing the developer, a screw having a shaft with a spiral screw blade, a toner density sensor to detect a density of the toner on a detection surface, and a detection surface agitating member fixedly mounted on the shaft of the screw at a position facing a detection surface to scrape away the developer accumulated on the detection surface as the screw rotates. The detection surface agitating member includes an elastic sheet elastically deformable to scrape away the developer accumulated on the detection surface and disposed at a substantially same angle to an axial direction of the shaft of the screw as the spiral screw blade.Type: GrantFiled: January 27, 2009Date of Patent: March 27, 2012Assignee: Ricoh Company, Ltd.Inventors: Yushi Hirayama, Shinji Kato, Takeroh Kurenuma, Keiichi Yoshida, Shin Hasegawa, Hitoshi Ishibashi, Yoshiaki Miyashita, Kohta Fujimori, Nobutaka Takeuchi, Tetsuya Muto, Akira Yoshida, Hiroyuki Uenishi
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Patent number: 8135315Abstract: A developing unit includable in a process cartridge and in an image forming apparatus includes a developer bearing member including a magnetic field generator and a nonmagnetic hollow member, a developer container, an agitation/conveyance member, a developer regulating member to regulate the thickness of a layer of the two-component developer. The magnetic field generator has first and second magnetic poles to generate respective magnetic forces for removing the developer from the developer bearing member after the developer passes the development region. The second magnetic pole generates a magnetic force to attract the developer to form a magnetic brush on the developer bearing member. The developer regulating member includes a magnetic member outwardly disposed on an exterior perimeter surface of the developer bearing member upstream from the developer regulating member, and one planar surface of the magnetic member faces the second magnetic pole across an effective development region.Type: GrantFiled: March 27, 2009Date of Patent: March 13, 2012Assignee: Ricoh Company, Ltd.Inventors: Takamasa Ozeki, Katsumi Masuda, Yoshio Hattori, Hiroyuki Uenishi, Yuji Suzuki, Kyohta Koetsuka, Masayuki Ohsawa, Yoshiyuki Takano, Takeroh Kurenuma, Akira Azami, Nobuyuki Taguchi
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Patent number: 8126375Abstract: A toner container includes a longitudinal container body and a held portion. The longitudinal container body has a first end and a second end distal to the first end in a length direction of the container body. The container body includes a gear configured to engage with a drive gear provided in the main body. The held portion is attached to the first end of the container body and configured to be detachably attached to the toner-container holder. The held portion includes a toner outlet, is configured to be held by the toner-container holder in non-rotating manner, and is biased downwardly by a force applied from the drive gear to the gear when the drive gear rotates.Type: GrantFiled: June 20, 2011Date of Patent: February 28, 2012Assignee: Ricoh Co., Ltd.Inventors: Nobuyuki Taguchi, Masayuki Yamane, Hideo Yoshizawa, Takeroh Kurenuma, Takayuki Tamaki, Seiji Terazawa, Masashi Hasegawa, Fumie Satoh, Teruo Hitosugi, Takashi Hisazumi, Goro Katsuyama
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Patent number: 8068770Abstract: An insertion passage 104Y for inserting a suction nozzle 73Y fixed to an image forming apparatus is provided on a holder 102Y, and a connecting passage 114Y that connects the insertion passage 104Y and a toner storage section 106Y of the holder 102Y is provided. After the toner sent from bottle 101Y to the holder 102Y falls towards the connecting passage 104Y, the toner flows into the suction nozzle 73Y through the connecting passage 114Y and is then discharged out of the holder 102Y. An airtightness between the insertion passage 114Y and the suction nozzle 73Y inserted into the insertion passage 114 Y is superior than an airtightness between the bottle 101Y and the holder 102Y engaged with the bottle 101Y.Type: GrantFiled: August 2, 2010Date of Patent: November 29, 2011Assignee: Ricoh Company, Ltd.Inventors: Takeroh Kurenuma, Fumio Ogata, Seiji Terazawa, Masayuki Yamane, Kenzo Tatsumi, Kiyonori Tsuda, Emi Kita, Nobuyuki Taguchi, Satoshi Narumi, Kazuhisa Sudo
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Publication number: 20110286771Abstract: A toner container includes a longitudinal container body and a held portion. The longitudinal container body has a first end and a second end distal to the first end in a length direction of the container body. The container body includes a gear configured to engage with a drive gear provided in the main body. The held portion is attached to the first end of the container body and configured to be detachably attached to the toner-container holder. The held portion includes a toner outlet, is configured to be held by the toner-container holder in non-rotating manner, and is biased downwardly by a force applied from the drive gear to the gear when the drive gear rotates.Type: ApplicationFiled: June 20, 2011Publication date: November 24, 2011Inventors: Nobuyuki TAGUCHI, Masayuki YAMANE, Hideo YOSHIZAWA, Takeroh KURENUMA, Takayuki TAMAKI, Seiji TERAZAWA, Masashi HASEGAWA, Fumie SATOH, Teruo HITOSUGI, Takashi HISAZUMI, Goro KATSUYAMA
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Patent number: 7991334Abstract: A toner container includes a longitudinal container body and a held portion. The longitudinal container body has a first end and a second end distal to the first end in a length direction of the container body. The container body includes a gear configured to engage with a drive gear provided in the main body. The held portion is attached to the first end of the container body and configured to be detachably attached to the toner-container holder. The held portion includes a toner outlet, is configured to be held by the toner-container holder in non-rotating manner, and is biased downwardly by a force applied from the drive gear to the gear when the drive gear rotates.Type: GrantFiled: August 16, 2010Date of Patent: August 2, 2011Assignee: Ricoh Co., Ltd.Inventors: Nobuyuki Taguchi, Masayuki Yamane, Hideo Yoshizawa, Takeroh Kurenuma, Takayuki Tamaki, Seiji Terazawa, Masashi Hasegawa, Fumie Satoh, Teruo Hitosugi, Takashi Hisazumi, Goro Katsuyama
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Patent number: 7962069Abstract: An insertion passage 104Y for inserting a suction nozzle 73Y fixed to an image forming apparatus is provided on a holder 102Y, and a connecting passage 114Y that connects the insertion passage 104Y and a toner storage section 106Y of the holder 102Y is provided After the toner sent from bottle 101Y to the holder 102Y falls towards the connecting passage 104Y, the toner flows into the suction nozzle 73Y through the connecting passage 114Y and is then discharged out of the holder 102Y An airtightness between the insertion passage 114Y and the suction nozzle 73Y inserted into the insertion passage 114 Y is superior than an airtightness between the bottle 101Y and the holder 102Y engaged with the bottle 101Y.Type: GrantFiled: August 5, 2005Date of Patent: June 14, 2011Assignee: Ricoh Company, Ltd.Inventors: Takeroh Kurenuma, Fumio Ogata, Seiji Terazawa, Masayuki Yamane, Kenzo Tatsumi, Kiyonori Tsuda, Emi Kita, Nobuyuki Taguchi, Satoshi Narumi, Kazuhisa Sudo
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Publication number: 20110008075Abstract: A toner container detachably attached to a toner-container holder of a main body of an image forming apparatus includes a container body that includes an opening, and discharges toner contained in the container body, from the opening; and a held portion that is held by the toner-container holder in a non-rotating manner. The held portion includes an open/close member for opening/closing the toner outlet in synchronization with an attachment/detachment operation of the held portion to/from the toner-container holder.Type: ApplicationFiled: September 20, 2010Publication date: January 13, 2011Inventors: Nobuyuki TAGUCHI, Goro KATSUYAMA, Takeroh KURENUMA, Hideo YOSHIZAWA, Masayuki YAMANE
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Publication number: 20110002713Abstract: A toner container includes a longitudinal container body and a held portion. The longitudinal container body has a first end and a second end distal to the first end in a length direction of the container body. The container body includes a gear configured to engage with a drive gear provided in the main body. The held portion is attached to the first end of the container body and configured to be detachably attached to the toner-container holder. The held portion includes a toner outlet, is configured to be held by the toner-container holder in non-rotating manner, and is biased downwardly by a force applied from the drive gear to the gear when the drive gear rotates.Type: ApplicationFiled: August 16, 2010Publication date: January 6, 2011Inventors: Nobuyuki Taguchi, Masayuki Yamane, Hideo Yoshizawa, Takeroh Kurenuma, Takayuki Tamaki, Seiji Terazawa, Masashi Hasegawa, Fumie Satoh, Teruo Hitosugi, Takashi Hisazumi, Goro Katsuyama
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Patent number: 7853183Abstract: A toner container detachably attached to a toner-container holder of a main body of an image forming apparatus includes a container body that includes an opening, and discharges toner contained in the container body, from the opening; and a held portion that is held by the toner-container holder in a non-rotating manner. The held portion includes an open/close member for opening/closing the toner outlet in synchronization with an attachment/detachment operation of the held portion to/from the toner-container holder.Type: GrantFiled: December 5, 2006Date of Patent: December 14, 2010Assignee: Ricoh Co., Ltd.Inventors: Nobuyuki Taguchi, Goro Katsuyama, Takeroh Kurenuma, Hideo Yoshizawa, Masayuki Yamane
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Patent number: 7853184Abstract: A toner container includes a longitudinal container body and a held portion. The longitudinal container body has a first end and a second end distal to the first end in a length direction of the container body. The container body includes a gear configured to engage with a drive gear provided in the main body. The held portion is attached to the first end of the container body and configured to be detachably attached to the toner-container holder. The held portion includes a toner outlet, is configured to be held by the toner-container holder in non-rotating manner, and is biased downwardly by a force applied from the drive gear to the gear when the drive gear rotates.Type: GrantFiled: December 6, 2006Date of Patent: December 14, 2010Assignee: Ricoh Co., Ltd.Inventors: Nobuyuki Taguchi, Masayuki Yamane, Hideo Yoshizawa, Takeroh Kurenuma, Takayuki Tamaki, Seiji Terazawa, Masashi Hasegawa, Fumie Satoh, Teruo Hitosugi, Takashi Hisazumi, Goro Katsuyama
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Publication number: 20100296847Abstract: An insertion passage 104Y for inserting a suction nozzle 73Y fixed to an image forming apparatus is provided on a holder 102Y, and a connecting passage 114Y that connects the insertion passage 104Y and a toner storage section 106Y of the holder 102Y is provided. After the toner sent from bottle 101Y to the holder 102Y falls towards the connecting passage 104Y, the toner flows into the suction nozzle 73Y through the connecting passage 114Y and is then discharged out of the holder 102Y. An airtightness between the insertion passage 114Y and the suction nozzle 73Y inserted into the insertion passage 114 Y is superior than an airtightness between the bottle 101Y and the holder 102Y engaged with the bottle 101Y.Type: ApplicationFiled: August 2, 2010Publication date: November 25, 2010Inventors: Takeroh Kurenuma, Fumio Ogata, Seiji Terazawa, Masayuki Yamane, Kenzo Tatsumi, Kiyonori Tsuda, Emi Kita, Nobuyuki Taguchi, Satoshi Narumi, Kazuhisa Sudo
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Patent number: 7835675Abstract: A toner container detachably attached to a toner-container holder of a main body of an image forming apparatus includes a container body that includes an opening, and discharges toner contained in the container body, from the opening; and a held portion that is held by the toner-container holder in a non-rotating manner. The held portion includes an open/close member for opening/closing the toner outlet in synchronization with an attachment/detachment operation of the held portion to/from the toner-container holder.Type: GrantFiled: December 5, 2006Date of Patent: November 16, 2010Assignee: Ricoh Co., Ltd.Inventors: Nobuyuki Taguchi, Goro Katsuyama, Takeroh Kurenuma, Hideo Yoshizawa, Masayuki Yamane
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Patent number: 7826777Abstract: A toner container detachably attached to a toner-container holder of a main body of an image forming apparatus includes a container body that includes an opening, and discharges toner contained in the container body, from the opening; and a held portion that is held by the toner-container holder in a non-rotating manner. The held portion includes an open/close member for opening/closing the toner outlet in synchronization with an attachment/detachment operation of the held portion to/from the toner-container holder.Type: GrantFiled: December 5, 2006Date of Patent: November 2, 2010Assignee: Ricoh Co., Ltd.Inventors: Nobuyuki Taguchi, Goro Katsuyama, Takeroh Kurenuma, Hideo Yoshizawa, Masayuki Yamane
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Patent number: D682926Type: GrantFiled: July 10, 2012Date of Patent: May 21, 2013Assignee: Ricoh Company, Ltd.Inventors: Makoto Kawaguchi, Daisuke Hamada, Takeroh Kurenuma
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Patent number: D697132Type: GrantFiled: December 5, 2012Date of Patent: January 7, 2014Assignee: Ricoh Company, Ltd.Inventors: Makoto Kawaguchi, Takeroh Kurenuma, Daisuke Hamada
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Patent number: RE47086Abstract: A toner container detachably attached to a toner-container holder of a main body of an image forming apparatus includes a container body that includes an opening, and discharges toner contained in the container body, from the opening; and a held portion that is held by the toner-container holder in a non-rotating manner. The held portion includes an open/close member for opening/closing the toner outlet in synchronization with an attachment/detachment operation of the held portion to/from the toner-container holder.Type: GrantFiled: April 17, 2014Date of Patent: October 16, 2018Assignee: RICOH COMPANY, LTD.Inventors: Nobuyuki Taguchi, Goro Katsuyama, Takeroh Kurenuma, Hideo Yoshizawa, Masayuki Yamane