Patents by Inventor Yoshihiko Ichikawa
Yoshihiko Ichikawa 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: 11947312Abstract: An example developing device includes a developing roller, a regulation blade to regulate a thickness of a toner layer attached to an outer circumference of the developing roller, a blade bracket for supporting the regulation blade, and an inner duct including an air supply port and extending in a longitudinal direction of the developing roller to form a flow path of air to cool the blade bracket.Type: GrantFiled: June 25, 2021Date of Patent: April 2, 2024Assignee: Hewlett-Packard Development Company, L.P.Inventors: Minguk Go, Horyul Lee, Yoshihiko Ichikawa, Yunkyu Shim
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Publication number: 20230393523Abstract: An example developing device includes a developing roller, a regulation blade to regulate a thickness of a toner layer attached to an outer circumference of the developing roller, a blade bracket for supporting the regulation blade, and an inner duct including an air supply port and extending in a longitudinal direction of the developing roller to form a flow path of air to cool the blade bracket.Type: ApplicationFiled: June 25, 2021Publication date: December 7, 2023Inventors: Minguk GO, Horyul LEE, Yoshihiko ICHIKAWA, Yunkyu SHIM
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Patent number: 11487224Abstract: An example developing device includes a housing to contain a developer and having an opening, a developing sleeve provided in the housing and partially exposed to the outside of the housing through the opening, a magnetic member including a plurality of magnetic poles and located inside the developing sleeve, and an elastic member blocking an inflow of air through a space between a downstream edge of the opening in a rotation direction of the developing sleeve and an outer circumferential surface of the developing sleeve. The elastic member includes a fixed portion fixed to the housing at a position adjacent to the downstream edge of the opening and an extension portion extending from the fixed portion in a bent form in the rotation direction of the developing sleeve to be elastically in contact with the surface of the developing sleeve.Type: GrantFiled: February 18, 2020Date of Patent: November 1, 2022Assignee: Hewlett-Packard Development Company, L.P.Inventors: Mitsuru Oikawa, Ohdug Kwon, Yoshihiko Ichikawa
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Patent number: 11372346Abstract: An image forming apparatus includes a body, a development cartridge to be attached to or detached from the body, and a fixing device to fix toner to a recording medium. The development cartridge includes a heat transfer blocking member disposed on an outer side of the development cartridge and adjacent to the fixing device when the development cartridge is attached to the body.Type: GrantFiled: February 3, 2020Date of Patent: June 28, 2022Assignee: Hewlett-Packard Development Company, L.P.Inventors: Ho-Ryul Lee, Yoshihiko Ichikawa, Ji-Won Moon
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Publication number: 20220075287Abstract: An image forming apparatus includes a body, a development cartridge to be attached to or detached from the body, and a fixing device to fix toner to a recording medium. The development cartridge includes a heat transfer blocking member disposed on an outer side of the development cartridge and adjacent to the fixing device when the development cartridge is attached to the body.Type: ApplicationFiled: February 3, 2020Publication date: March 10, 2022Applicant: Hewlett-Packard Development Company, L.P.Inventors: Ho-Ryul Lee, Yoshihiko Ichikawa, Ji-Won Moon
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Publication number: 20220035273Abstract: An example developing device includes a housing to contain a developer and having an opening, a developing sleeve provided in the housing and partially exposed to the outside of the housing through the opening, a magnetic member including a plurality of magnetic poles and located inside the developing sleeve, and an elastic member blocking an inflow of air through a space between a downstream edge of the opening in a rotation direction of the developing sleeve and an outer circumferential surface of the developing sleeve. The elastic member includes a fixed portion fixed to the housing at a position adjacent to the downstream edge of the opening and an extension portion extending from the fixed portion in a bent form in the rotation direction of the developing sleeve to be elastically in contact with the surface of the developing sleeve.Type: ApplicationFiled: February 18, 2020Publication date: February 3, 2022Inventors: Mitsuru Oikawa, Ohdug Kwon, Yoshihiko Ichikawa
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Patent number: 9316984Abstract: It is a sealing member that seals a gap between one member and the other member, including: a mounting section that has a portion coming into contact with the other member; and an extension section that extends from a side of the mounting section to a side of the one member and is configured to approach the mounting section while coming into contact with the one member by receiving a force from the one member; and a recess that is provided between the mounting section and the extension section and is formed from a part of the mounting section to a part of the extension section, and is recessed from a surface of the mounting section on the side of the one member and a surface of the extension section on a side of the other member.Type: GrantFiled: August 14, 2014Date of Patent: April 19, 2016Assignee: FUJI XEROX CO., LTD.Inventors: Teruyo Ryuzaki, Yoshihiko Ichikawa, Kokichi Kasai, Koichi Kumeta, Masahiro Mori
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Publication number: 20150108711Abstract: It is a sealing member that seals a gap between one member and the other member, including: a mounting section that has a portion coming into contact with the other member; and an extension section that extends from a side of the mounting section to a side of the one member and is configured to approach the mounting section while coming into contact with the one member by receiving a force from the one member; and a recess that is provided between the mounting section and the extension section and is formed from a part of the mounting section to a part of the extension section, and is recessed from a surface of the mounting section on the side of the one member and a surface of the extension section on a side of the other member.Type: ApplicationFiled: August 14, 2014Publication date: April 23, 2015Inventors: Teruyo RYUZAKI, Yoshihiko ICHIKAWA, Kokichi KASAI, Koichi KUMETA, Masahiro MORI
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Patent number: 8478181Abstract: A recording material cooling device includes: a transporting section that transports a recording material; a heat radiation section that radiates heat of the recording material through the transporting section, the heat radiation section coming into contact with the transporting section; an air current generating section that generates an air current which flows through the heat radiation section; and a pair of passages that are respectively located before and after a zone where the transporting section and the heat radiation section are brought into contact with each other, each of the pair of passages being formed on an outer side of the heat radiation section to flow a portion of the air current.Type: GrantFiled: August 24, 2009Date of Patent: July 2, 2013Assignee: Fuji Xerox Co., Ltd.Inventor: Yoshihiko Ichikawa
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Patent number: 7865122Abstract: A recording material cooling apparatus includes: a cooling belt that is in contact with a toner-image surface of a recording material on which a toner image is heated by a fixing device to be in a fusing state, to cool the recording material while conveying the recording material; and an air blowing unit that blows air toward the toner-image surface of the recording material which is between the fixing device and the cooling belt, the toner-image surface being in the fusing state, or an air sucking unit that sucks air from the toner-image surface.Type: GrantFiled: June 12, 2008Date of Patent: January 4, 2011Assignee: Fuji Xerox Co., Ltd.Inventors: Takaharu Koyama, Yoshihiko Ichikawa, Shuuichi Yamamura, Masayuki Yamamiya, Satoru Nishikawa, Masayuki Enta, Shiro Miyake, Naochika Iida
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Publication number: 20100074663Abstract: A recording material cooling device includes: a transporting section that transports a recording material; a heat radiation section that radiates heat of the recording material through the transporting section, the heat radiation section coming into contact with the transporting section; an air current generating section that generates an air current which flows through the heat radiation section; and a pair of passages that are respectively located before and after a zone where the transporting section and the heat radiation section are brought into contact with each other, each of the pair of passages being formed on an outer side of the heat radiation section to flow a portion of the air current.Type: ApplicationFiled: August 24, 2009Publication date: March 25, 2010Inventor: Yoshihiko ICHIKAWA
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Publication number: 20090173422Abstract: A electronic device is mounted on a circumferential surface of an inner liner by tucking first, second and third edges of a device plate between a first holding plane of a first guide tab and a surface of a holder plate, between a second holding plane of a second guide tab and the surface of the holder plate, and between a third holding plane of a third guide tab and the surface of the holder plate. The electronic device can be stably-mounted over the long term without difficulty and can be removed from the circumferential surface of the inner liner without difficulty.Type: ApplicationFiled: November 22, 2006Publication date: July 9, 2009Inventors: Atsuo Utsumi, Yoichi Watanabe, Makoto Furukawa, Yoshihiko Ichikawa
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Publication number: 20090103959Abstract: A recording material cooling apparatus includes: a cooling belt that is in contact with a toner-image surface of a recording material on which a toner image is heated by a fixing device to be in a fusing state, to cool the recording material while conveying the recording material; and an air blowing unit that blows air toward the toner-image surface of the recording material which is between the fixing device and the cooling belt, the toner-image surface being in the fusing state, or an air sucking unit that sucks air from the toner-image surface.Type: ApplicationFiled: June 12, 2008Publication date: April 23, 2009Applicant: FUJI XEROX CO., LTD.Inventors: Takaharu KOYAMA, Yoshihiko Ichikawa, Shuuichi Yamamura, Masayuki Yamamiya, Satoru Nishikawa, Masayuki Enta, Shiro Miyake, Naochika Iida
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Publication number: 20090092430Abstract: A sheet carrying unit, includes: a first belt stretched by a plurality of rollers, the first belt carrying a sheet while putting the sheet on a surface of the first belt; a first driving roller that drives the first belt; a second belt stretched by a plurality of rollers, the second belt carrying the sheet while holding the sheet together with the first belt; and a second driving roller that drives the second belt; wherein a frictional force generated between the second driving roller and the second belt is set smaller than a frictional force generated between the first belt and the first driving roller, a frictional force generated between the first belt and the sheet, and a frictional force generated between the second belt and the sheet, respectively.Type: ApplicationFiled: June 20, 2008Publication date: April 9, 2009Applicant: FUJI XEROX CO., LTD.Inventors: Satoru Nishikawa, Naochika Iida, Shiro Miyake, Takaharu Koyama, Masayuki Enta, Masayuki Yamamiya, Shuuichi Yamamura, Yoshihiko Ichikawa
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Patent number: 6308024Abstract: It is a purpose of the invention to provide a dust protector for an image exposure device capable of preventing particles from sticking to windows or the like of the image exposure device and free from moisture condensation on the windows or the like of the image exposure device as a result of direct exposure of the same to the atmosphere and an image forming apparatus utilizing the same. The purpose is achieved by providing a dust protector for an image exposure device for performing image exposure on a member to be exposed from below with a dust protective member for preventing particles from sticking to at least a member located above an optical path of the image exposure device by covering the image exposure device from above without blocking the optical path of the image exposure device and an air flow generating unit for generating an air flow that prevents particles from entering the region covered by the dust protective member.Type: GrantFiled: June 6, 2000Date of Patent: October 23, 2001Assignee: Fuji Xerox Co., Ltd.Inventors: Yutaka Nakayama, Yoshihiko Ichikawa, Masayoshi Nishida, Tomonori Ishikawa, Tohru Hisano, Naoyuki Egusa
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Patent number: D377921Type: GrantFiled: May 5, 1995Date of Patent: February 11, 1997Assignee: Bridgestone CorporationInventors: Yasuo Himuro, Hiroshi Imai, Yoshihiko Ichikawa