Patents by Inventor Koji Hirakura
Koji Hirakura 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: 9378917Abstract: A terminal-integrated fuse (2) includes two planar members (10), (10) serving as terminals for mounting on a substrate. The two planar members (10), (10) are spaced on a same horizontal plane. A fuse body (4) is located on a horizontal plane at a level different from the level of the said horizontal plane and between the planar members (10), (10). The fuse body (4) is formed integral with the planar members (10), (10). A casing (14) has side walls (18), (20) and end walls (22), (24) disposed around an opening. The fuse body (4) is positioned in the casing (14), and the two planar members (10, (10) are in contact with the end walls (22), (24), respectively. An arc suppressing material portion (26) is provided in the casing (14) in such a manner the fuse body (4) is embedded therein.Type: GrantFiled: February 15, 2013Date of Patent: June 28, 2016Assignee: MATSUO ELECTRIC CO., LTD.Inventors: Yasushi Yoshida, Koji Hirakura
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Publication number: 20150002258Abstract: A terminal-integrated fuse (2) includes two planar members (10), (10) serving as terminals for mounting on a substrate. The two planar members (10), (10) are spaced on a same horizontal plane. A fuse body (4) is located on a horizontal plane at a level different from the level of the said horizontal plane and between the planar members (10), (10). The fuse body (4) is formed integral with the planar members (10), (10). A casing (14) has side walls (18), (20) and end walls (22), (24) disposed around an opening. The fuse body (4) is positioned in the casing (14), and the two planar members (10, (10) are in contact with the end walls (22), (24), respectively. An arc suppressing material portion (26) is provided in the casing (14) in such a manner the fuse body (4) is embedded therein.Type: ApplicationFiled: February 15, 2013Publication date: January 1, 2015Inventors: Yasushi Yoshida, Koji Hirakura
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Patent number: 8081331Abstract: An image forming apparatus includes an input part for inputting information, a processing part for processing the information; a storing part for storing the information, an output part for outputting the information, a writing part for writing desired information to a portable recording medium, and a scanner for scanning an original as image information. In image forming apparatus, the image information scanned by the scanner is stored in the storing part, and wherein the input part, the processing part, the storing part, and the output part are centralized at one place, and send and receive the information to and from each other.Type: GrantFiled: January 25, 2006Date of Patent: December 20, 2011Assignee: Ricoh Company, Ltd.Inventors: Takuro Sekiya, Koji Hirakura
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Publication number: 20060192992Abstract: An image forming apparatus includes an input part for inputting information, a processing part for processing the information; a storing part for storing the information, an output part for outputting the information, a writing part for writing desired information to a portable recording medium, and a scanner for scanning an original as image information. In image forming apparatus, the image information scanned by the scanner is stored in the storing part, and wherein the input part, the processing part, the storing part, and the output part are centralized at one place, and send and receive the information to and from each other.Type: ApplicationFiled: January 25, 2006Publication date: August 31, 2006Inventors: Takuro Sekiya, Koji Hirakura
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Patent number: 7072127Abstract: An optical scanning lens is used in a scanning and image forming optical system which gathers a light flux deflected by a light deflector in the vicinity of a surface to be scanned. The lens is formed by plastic molding of polyolefin resin, and the following condition is satisfied: 0<|?n(x)?min[?n(x)]|<34×10?5, where ?n(x) denotes a refractive-index distribution existing inside the lens, in a range which the light flux passes through, in the lens, and min[?n(x)] denotes the minimum value of the ?n(x).Type: GrantFiled: February 7, 2005Date of Patent: July 4, 2006Assignee: Ricoh Company, Ltd.Inventors: Hiroyuki Suhara, Satoru Itoh, Tatsuya Ito, Takeshi Ueda, Yoshinori Hayashi, Magane Aoki, Kenichi Takanashi, Takao Yamaguchi, Taira Kouchiwa, Koji Hirakura, Seizo Suzuki
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Publication number: 20060022910Abstract: In a multifunction display device, a plurality of display units have a sheet-like or plate-like configuration and different displaying capabilities. A holding unit holds the plurality of display units. A power supply unit supplies power to the plurality of display units. In the multifunction display device, the plurality of display units, the holding unit, and the power supply unit are united, and the holding unit allows a display surface of each of the plurality of display units to be freely opened or closed in a rotatable manner.Type: ApplicationFiled: July 27, 2005Publication date: February 2, 2006Inventors: Takuro Sekiya, Koji Hirakura, Ikuo Shiota, Hiroshi Koide
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Publication number: 20050128615Abstract: An optical scanning lens is used in a scanning and image forming optical system which gathers a light flux deflected by a light deflector in the vicinity of a surface to be scanned. The lens is formed by plastic molding of polyolefin resin, and the following condition is satisfied: 0<|?n(x)?min[?n(x)]|<34×10?5, where ?n(x) denotes a refractive-index distribution existing inside the lens, in a range which the light flux passes through, in the lens, and min[?n(x)] denotes the minimum value of the ?n(x).Type: ApplicationFiled: February 7, 2005Publication date: June 16, 2005Inventors: Hiroyuki Suhara, Satoru Itoh, Tatsuya Ito, Takeshi Ueda, Yoshinori Hayashi, Magane Aoki, Kenichi Takanashi, Takao Yamaguchi, Taira Kouchiwa, Koji Hirakura, Seizo Suzuki
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Patent number: 6870652Abstract: An optical scanning lens which is used in a scanning and age forming optical system which gathers a light flux deflected by a light deflector in the vicinity of a surface to be scanned. The lens is formed by plastic molding of polyolefin resin, and the following condition is satisfied: 0<|?n(x)?min[?n(x)]|<34×10?5, where ?n(x) denotes a refractive-index distribution existing inside the lens, in a range which the light flux passes through, in the lens, and min[?n(x)] denotes the minimum value of the ?n(x).Type: GrantFiled: April 9, 2004Date of Patent: March 22, 2005Assignee: Ricoh Company, Ltd.Inventors: Hiroyuki Suhara, Satoru Itoh, Tatsuya Ito, Takeshi Ueda, Yoshinori Hayashi, Magane Aoki, Kenichi Takanashi, Takao Yamaguchi, Taira Kouchiwa, Koji Hirakura, Seizo Suzuki
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Publication number: 20040196520Abstract: An optical scanning lens which is used in a scanning and age forming optical system which gathers a light flux deflected by a light deflector in the vicinity of a surface to be scanned. The lens is formed by plastic molding of polyolefin resin, and the following condition is satisfied: 0<|&Dgr;n(x)−min [&Dgr;n(x)]|<34×10−5, where &Dgr;n(x) denotes a refractive-index distribution existing inside the lens, in a range which the light flux passes through, in the lens, and min [&Dgr;n(x)] denotes the minimum value of the &Dgr;n(x).Type: ApplicationFiled: April 9, 2004Publication date: October 7, 2004Inventors: Hiroyuki Suhara, Satoru Itoh, Tatsuya Ito, Takeshi Ueda, Yoshinori Hayashi, Magane Aoki, Kenichi Takanashi, Takao Yamaguchi, Taira Kouchiwa, Koji Hirakura, Seizo Suzuki
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Patent number: 6744545Abstract: An optical scanning lens is used in a scanning and image forming optical system which gathers a light flux deflected by a light deflector in the vicinity of a surface to be scanned. The lens is formed by plastic molding of polyolefin resin, and the following condition is satisfied: 0<|&Dgr;n(x)−min[&Dgr;n(x)]|<34×10−5, where &Dgr;n(x) denotes a refractive-index distribution existing inside the lens, in a range which the light flux passes through, in the lens, and min[&Dgr;n(x)] denotes the minimum value of the &Dgr;n(x).Type: GrantFiled: May 13, 2002Date of Patent: June 1, 2004Assignee: Ricoh Company, Ltd.Inventors: Hiroyuki Suhara, Satoru Itoh, Tatsuya Ito, Takeshi Ueda, Yoshinori Hayashi, Magane Aoki, Kenichi Takanashi, Takao Yamaguchi, Taira Kouchiwa, Koji Hirakura, Seizo Suzuki
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Publication number: 20020163571Abstract: An optical scanning lens is used in a scanning and image forming optical system which gathers a light flux deflected by a light deflector in the vicinity of a surface to be scanned. The lens is formed by plastic molding of polyolefin resin, and the following condition is satisfied: 0<|&Dgr;n(x)−min[&Dgr;n(x)]|<34×10−5, where &Dgr;n(x) denotes a refractive-index distribution existing inside the lens, in a range which the light flux passes through, in the lens, and min[&Dgr;n(x)] denotes the minimum value of the &Dgr;n(x).Type: ApplicationFiled: May 13, 2002Publication date: November 7, 2002Inventors: Hiroyuki Suhara, Satoru Itoh, Tatsuya Ito, Takeshi Ueda, Yoshinori Hayashi, Magane Aoki, Kenichi Takanashi, Takao Yamaguchi, Taira Kouchiwa, Koji Hirakura, Seizo Suzuki
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Patent number: 6400391Abstract: An optical scanning lens is used in a scanning and image forming optical system which gathers a light flux deflected by a light deflector in the vicinity of a surface to be scanned. The lens is formed by plastic molding of polyolefin resin, and the following condition is satisfied: 0<|&Dgr;n(x)−min[&Dgr;n(x)]|<34×10−5, where &Dgr;n(x) denotes a refractive-index distribution existing inside the lens, in a range which the light flux passes through, in the lens, and min[&Dgr;n(x)] denotes the minimum value of the &Dgr;n(x).Type: GrantFiled: June 6, 2000Date of Patent: June 4, 2002Assignee: Ricoh Company, Ltd.Inventors: Hiroyuki Suhara, Satoru Itoh, Tatsuya Ito, Takeshi Ueda, Yoshinori Hayashi, Magane Aoki, Kenichi Takanashi, Takao Yamaguchi, Taira Kouchiwa, Koji Hirakura, Seizo Suzuki
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Patent number: 4700659Abstract: A developing unit is disclosed which utilizes a two-component developer comprising a toner and a carrier to develop an electrostatic latent image formed on a photosensitive member. The unit comprises a doctor for controlling the amount of developer supplied onto a developing sleeve, a flow plate for receiving a quantity of developer scraped off by the doctor and allowing it to flow therealong, at least one deflector plate disposed at an angle on the flow plate for causing the developer to be directed toward one side, and a screw assembly for conveying the developer which has been directed toward one side to the other side and returning it to the interior of a developer vessel.Type: GrantFiled: May 19, 1982Date of Patent: October 20, 1987Assignee: Ricoh Co., Ltd.Inventors: Koji Hirakura, Masumi Ikesue
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Patent number: 4487501Abstract: An original to be copied is placed in a given position. An exposure optics including a movable part is employed to focus an optical image of slitwise segment of the original on a photosensitive member. The photosensitive member moves in a given direction and at a given speed throughout the exposure. The location where the image of slitwise segment of the original is focused moves through the space of the arrangement at a given speed and in a direction opposite from the direction of movement of the photosensitive member throughout the exposure. Consequently, the location corresponding to the initiation of the exposure is situated downstream as viewed in the direction of movement of the surface of the photosensitive member while the location corresponding to the end of the exposure is situated upstream as viewed in the same direction.Type: GrantFiled: June 1, 1982Date of Patent: December 11, 1984Assignee: Ricoh Company, Ltd.Inventors: Shigeru Suzuki, Yutaka Koizumi, Nobuyuki Yanagawa, Koji Hirakura, Chikara Imai
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Patent number: 4408863Abstract: In a copy paper separating device for use in a transfer type electrophotographic copying machine which includes a conductive carrier member, preferably in the form a conductive endless belt extended between a pair of pulleys. The conductive carrier member is disposed in the periphery of the photosensitive member to which a copy paper is brought into contact for the transfer of a toner image formed on the photosensitive member. The potential of the conductive carrier member is maintained nearly at zero level during the first step of the separating operation; whereas, the potential of the carrier member is increased to a predetermined value of the polarity opposite to that of the toner image during the second step.Type: GrantFiled: July 17, 1981Date of Patent: October 11, 1983Assignee: Ricoh Company, Ltd.Inventors: Yoshihiro Ogata, Koji Sakamoto, Harumi Takahashi, Koji Hirakura
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Patent number: 4389972Abstract: A toner concentration control system for use in electrophotographic copying machines or the like, wherein light from a single light source is simultaneously detected by two photosensors, or by two sensing portions of a single photosensor, the light striking one of the photosensors (or portions) directly and the other after being reflected from developer comprising toner and carrier particles as the developer passes a viewing window in a chute provided for the transport thereof within the copying machine, the intensity of the reflected light being inversely proportional to the concentration of toner in the developer, whereby, by comparison of the output of the photosensors (or portions) by conventional means, the concentration of toner in the developer can be determined and adjusted, the photosensors (or portions) having been carefully selected as a pair of their essentially identical characteristics and response to ambient conditions so that, for example, their parallel deterioration with time or their identiType: GrantFiled: July 25, 1980Date of Patent: June 28, 1983Assignee: Ricoh Company, Ltd.Inventors: Koji Hirakura, Yasuo Sawada, Kenta Watase, Takeshi Iijima
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Patent number: 4369733Abstract: A toner concentration control apparatus of the type for allowing developer to pass through a chute, which is capable of detecting stopping of the flow of the developer in the chute, clogging of the chute with the developer, or coating of a viewing window formed in the chute with the developer, and upon occurrence of such abnormalities, minimizing the trouble therefrom in the operation of the copying machine, in which light from a single light source is simultaneously detected by two photosensors, the light striking one of the photosensors directly and the other after being reflected from the developer comprising toner and carrier particles as the developer passes a viewing window in the chute provided for the detection of the toner concentration within the copying machine, and the output of the photosensors is compared with each other and the concentration of toner in the developer can be determined and adjusted by the comparison value.Type: GrantFiled: November 3, 1980Date of Patent: January 25, 1983Assignee: Ricoh Company, Ltd.Inventors: Koji Hirakura, Yasuo Sawada, Kenta Watase, Takahiko Kitamura
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Patent number: 4367032Abstract: A toner image of an original document is formed on a photoconductive drum (1) and transferred onto a copy sheet (4) which is moved into contact with the drum (1) by a corona charging unit (5) which applies an electrostatic charge to the copy sheet (4) causing the toner image to be transferred thereto. The copy sheet (4) is separated from the drum (1) by a conductive belt (6). The belt (6) is initially grounded so that the leading edge of the copy sheet (4) is attracted thereto by induced electrostatic charge. A voltage of the same polarity as the transfer charge is then applied to the belt (6) to prevent transfer of the toner image back to the drum (1).Type: GrantFiled: February 9, 1981Date of Patent: January 4, 1983Assignee: Ricoh Company, Ltd.Inventors: Koji Sakamoto, Koji Hirakura, Yoshihiro Ogata, Harumi Takahashi
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Patent number: 4268157Abstract: A photoconductive drum is formed with a photoconductive dielectric layer for producing an electrostatic image and an endless transfer belt is formed with a dielectric layer thereon. A toner substance is applied to the drum to produce a toner image, and a copy sheet is pressed between the belt and drum to transfer the toner image to the copy sheet. An electric potential of the same polarity as the electrostatic image is applied to the copy sheet to attract the toner from the drum onto the copy sheet. The potential has a magnitude which is slightly less than a magnitude at which charge transfer from the belt to the drum occurs due to dielectric breakdown through the copy sheet or field emission from the copy sheet to the drum which would degrade the electrostatic image. The method enables a large number of copies to be produced from a single electrostatic image through repeated development and transfer.Type: GrantFiled: August 28, 1978Date of Patent: May 19, 1981Assignee: Ricoh Company, Ltd.Inventors: Yutaka Ebi, Koji Hirakura, Fuyuhiko Matsumoto, Wasaburo Ohta, Satoru Tomita
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Patent number: 4266141Abstract: A powdered developer (26) comprising carrier and toner particles is caused to flow by gravity downwardly through a passageway (71). A transparent electrode (62) is disposed in the passageway (71). A light source (64) and photosensor (66) are arranged on opposite sides of the electrode (62) for sensing an amount of attracted toner. The electrode (62) is first de-energized and cleaned by aprtially restricting the passageway (71) below the electrode (62) and allowing developer (26) to accumulate in the passageway (71) from the restriction upwardly past the electrode (62) while a restricted amount of developer (26) flows downwardly through the restriction. Then, the restriction is removed and the passageway (71) blocked above the electrode (62), allowing the accumulated developer (26) to flow downwardly past the electrode (62). Then, the passageway (71) is completely unblocked and the electrode (62) energized with an electric potential causing toner to be attracted thereto.Type: GrantFiled: July 16, 1979Date of Patent: May 5, 1981Assignee: Ricoh Company, Ltd.Inventors: Koji Hirakura, Yasuo Sawada, Kenta Watase