Patents by Inventor Toshihiko Miura
Toshihiko Miura 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: 7300600Abstract: In a rare earth bonded magnet comprising a mixture of rare earth magnetic powder, thermosetting resin, and lubricant, the lubricant is constituted by amino-acid compound, specifically either N-lauroyl-L-lysine or N-lauroyl-asparaginic acid. The content of the amino-acid compound as lubricant in the mixture is set to range between 0.01 wt % and 1.0 wt % of the magnetic powder. Since the amino-acid compound has a high decomposition point, the resultant magnet after heat-curing treatment has a sufficient mechanical strength. Also, the amino-acid compound is nonhygroscopic, and therefore oxidation resistance and humidity resistance are good enough. Further, since the amino-acid compound produces a small amount of outgas, the resultant magnet can be suitably and reliably used in a hard disk drive which has stringent requirements, especially on outgas.Type: GrantFiled: February 25, 2005Date of Patent: November 27, 2007Assignee: Minebea Co., LtdInventors: Shinsaku Nishimura, Noboru Menjo, Toshihiko Miura
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Patent number: 7169468Abstract: A resin bonded rare earth magnet, compression molded from rare earth-transition alloy powder and thermosetting resin, having a magnet 1 comprising a mixture of thermosetting resin and rare earth-transition alloy powder with a particle size of between 20 and 300 microns, a filling material 3 with particle size between 0.1 and 15 microns which is used to fill in the depressions 2 on the surface of said magnet 1 and is then fixed with said thermosetting resin, and a corrosion inhibiting coat 4 made from synthetic resin applied to the surface of said magnet 1 which has been rendered smooth by the application of said filling material into the depressions on its surface.Type: GrantFiled: October 18, 1999Date of Patent: January 30, 2007Assignee: Minebea Co., LtdInventors: Toshihiko Miura, Masahito Kawasaki, Shunji Suzuki, Shuichi Nishida
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Patent number: 7169287Abstract: A decomposition apparatus that decomposes a decomposition target is provided. The decomposition apparatus includes a decomposition chamber having a decomposition section that continuously decomposes the decomposition target, an introducing device that continuously introduces the decomposition target into the decomposition chamber, a discharging device that discharges decomposition products produced in the decomposition chamber, and a selection section that selects a set of drive conditions from a plurality of sets of conditions for the decomposition section such that the concentration of the decomposition target within the decomposition chamber during decomposition of the decomposition target is at the predetermined concentration.Type: GrantFiled: July 26, 2002Date of Patent: January 30, 2007Assignee: Canon Kabushiki KaishaInventors: Toshihiko Miura, Hiroshi Kubo, Kinya Kato, Masahiro Kawaguchi, Akira Kuriyama
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Patent number: 7083707Abstract: A decomposition apparatus for decomposition of decomposition targets such as organic chlorinated compounds is provided. The decomposition apparatus includes a contact section with an internal space to allow a decomposition target to come into contact with and be taken into a liquid, a flow path to lead along with the liquid the decomposition target taken into the liquid to a position different from the internal space, a decomposing device positioned along the flow path in a state cut off from the outside air to decompose the decomposition target that has been led through the flow path, and a device to introduce to the contact section a liquid that contains products produced from the decomposition of the decomposition target by the decomposing device.Type: GrantFiled: July 26, 2002Date of Patent: August 1, 2006Assignee: Canon Kabushiki KaishaInventors: Toshihiko Miura, Hiroshi Kubo, Kinya Kato, Masahiro Kawaguchi, Akira Kuriyama
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Publication number: 20050211947Abstract: In a rare earth bonded magnet comprising a mixture of rare earth magnetic powder, thermosetting resin, and lubricant, the lubricant is constituted by amino-acid compound, specifically either N-lauroyl-L-lysine or N-lauroyl-asparaginic acid. The content of the amino-acid compound as lubricant in the mixture is set to range between 0.01 wt % and 1.0 wt % of the magnetic powder. Since the amino-acid compound has a high decomposition point, the resultant magnet after heat-curing treatment has a sufficient mechanical strength. Also, the amino-acid compound is nonhygroscopic, and therefore oxidation resistance and humidity resistance are good enough. Further, since the amino-acid compound produces a small amount of outgas, the resultant magnet can be suitably and reliably used in a hard disk drive which has stringent requirements, especially on outgas.Type: ApplicationFiled: February 25, 2005Publication date: September 29, 2005Applicant: MINEBEA CO., LTD.Inventors: Shinsaku Nishimura, Noboru Menjo, Toshihiko Miura
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Patent number: 6654575Abstract: A developer container includes a developer containing unit containing a developer and a sealing member supplied between a plurality of members to prevent leakage of the developer. The sealing member is a liquid elastomer. In an area in which the liquid elastomer is supplied, supply amounts of the sealing member at a start point and end point are larger than a supply amount of the sealing member in an intermediate portion.Type: GrantFiled: November 23, 2001Date of Patent: November 25, 2003Assignee: Canon Kabushiki KaishaInventors: Toshihiko Miura, Masatoshi Kato, Kanji Yokomori
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Patent number: 6638599Abstract: A ferromagnetic metal powder for magnetic recording containing iron as the main constituent and MAl2O4 (wherein M is a transition metal), wherein the coercive force (Hc) thereof is from 135 to 240 kA/m, the saturation magnetization (&sgr;s) is from 100 to 150 A·m2/kg, the average major axis length of the particles thereof is from 30 to 80 nm, the average acicular ratio of the particles is from 4.0 to 8.0, and the variation coefficient of the major axis lengths is from 3 to 25%. A magnetic recording medium having on a support a non-magnetic layer and at least a magnetic layer containing the above-described ferromagnetic metal powder, said medium has good short wavelength output and good S/N.Type: GrantFiled: June 11, 2001Date of Patent: October 28, 2003Assignee: Fuji Photo Film Co., Ltd.Inventors: Kouichi Masaki, Toshihiko Miura
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Patent number: 6630256Abstract: Provided is a magnetic recording medium with a total thickness equal to or less than 8 &mgr;m having good electromagnetic characteristics and good repeat running durability in which the dropping of powder onto the running path and tape edge deformation are prevented and a magnetic recording medium with a total thickness equal to or less than 8 &mgr;m having good electromagnetic characteristics, good repeat running durability, and good dimensional stability.Type: GrantFiled: July 31, 2001Date of Patent: October 7, 2003Assignee: Fuji Photo Film Co., Ltd.Inventors: Masaki Suzuki, Toshihiko Miura, Masatoshi Takahashi, Hiroaki Takano
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Patent number: 6607807Abstract: A ferromagnetic metal powder comprises: a metal portion comprising Fe; and an oxide layer around the metal portion, wherein the oxide layer comprises an iron oxide having magnetism such that the saturation magnetization is from 50 to 95 A.m2/kg.Type: GrantFiled: December 18, 2000Date of Patent: August 19, 2003Assignee: Fuji Photo Film Co., Ltd.Inventors: Noboru Zinbo, Toshihiko Miura
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Publication number: 20030019743Abstract: A decomposition apparatus that decomposes a decomposition target is provided. The decomposition apparatus includes a decomposition chamber having a decomposition section that continuously decomposes the decomposition target, an introducing device that continuously introduces the decomposition target into the decomposition chamber, a discharging device that discharges decomposition products produced in the decomposition chamber, and a selection section that selects a set of drive conditions from a plurality of sets of conditions for the decomposition section such that the concentration of the decomposition target within the decomposition chamber during decomposition of the decomposition target is at the predetermined concentration.Type: ApplicationFiled: July 26, 2002Publication date: January 30, 2003Applicant: CANON KABUSHIKI KAISHAInventors: Toshihiko Miura, Hiroshi Kubo, Kinya Kato, Masahiro Kawaguchi, Akira Kuriyama
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Publication number: 20030019742Abstract: A decomposition apparatus for decomposition of decomposition targets such as organic chlorinated compounds is provided. The decomposition apparatus includes a contact section with an internal space to allow a decomposition target to come into contact with and be taken into a liquid, a flow path to lead along with the liquid the decomposition target taken into the liquid to a position different from the internal space, a decomposing device positioned along the flow path in a state cut off from the outside air to decompose the decomposition target that has been led through the flow path, and a device to introduce to the contact section a liquid that contains products produced from the decomposition of the decomposition target by the decomposing device.Type: ApplicationFiled: July 26, 2002Publication date: January 30, 2003Applicant: CANON KABUSHIKI KAISHAInventors: Toshihiko Miura, Hiroshi Kubo, Kinya Kato, Masahiro Kawaguchi, Akira Kuriyama
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Publication number: 20030012948Abstract: A resin bonded rare earth magnet, compression molded from rare earth-transition alloy powder and thermosetting resin, having a magnet body 1 comprising a mixture of thermosetting resin and rare earth-transition alloy powder with a particle size of between 20 and 300 microns, a filling material 3 with particle size between 0.1 and 15 microns which is used to fill in the depressions 2 on the surface of said magnet 1 and is then fixed with said thermosetting resin, and a corrosion inhibiting coat 4 made from synthetic resin applied to the surface of said magnet 1 which has been rendered smooth by the application of said filling material into the depressions on its surface.Type: ApplicationFiled: October 18, 1999Publication date: January 16, 2003Inventors: TOSHIHIKO MIURA, MASAHITO KAWASAKI, SHUNJI SUZUKI, SHUICHI NISHIDA
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Publication number: 20020119349Abstract: Provided is a magnetic recording medium with a total thickness equal to or less than 8 &mgr;m having good electromagnetic characteristics and good repeat running durability in which the dropping of powder onto the running path and tape edge deformation are prevented and a magnetic recording medium with a total thickness equal to or less than 8 &mgr;m having good electromagnetic characteristics, good repeat running durability, and good dimensional stability.Type: ApplicationFiled: July 31, 2001Publication date: August 29, 2002Inventors: Masaki Suzuki, Toshihiko Miura, Masatoshi Takahashi, Hiroaki Takano
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Publication number: 20020064392Abstract: A developer container containing a developer has a developer containing unit containing a developer and a sealing member supplied between a plurality of members to prevent a leak of the developer, said sealing member being a liquid elastomer, and, in an area in which said liquid elastomer is supplied, the supply amount in end portions being larger than the supply amount in an intermediate portion.Type: ApplicationFiled: November 23, 2001Publication date: May 30, 2002Inventors: Toshihiko Miura, Masatoshi Kato, Kanji Yokomori
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Publication number: 20020012814Abstract: A ferromagnetic metal powder for magnetic recording containing iron as the main constituent and MAl2O4 (wherein M is a transition metal), wherein the coercive force (Hc) thereof is from 135 to 240 kA/m, the saturation magnetization (&sgr;s) is from 100 to 150 A·m2/kg, the average major axis length of the particles thereof is from 30 to 80 nm, the average acicular ratio of the particles is from 4.0 to 8.0, and the variation coefficient of the major axis lengths is from 3 to 25%. A magnetic recording medium having on a support a non-magnetic layer and at least a magnetic layer containing the above-described ferromagnetic metal powder, said medium has good short wavelength output and good S/N.Type: ApplicationFiled: June 11, 2001Publication date: January 31, 2002Applicant: FUJI PHOTO FILM CO.,LTD.Inventors: Kouichi Masaki, Toshihiko Miura
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Patent number: 6338889Abstract: An optical information recording disc is composed a transparent substrate, an information recording layer, a metallic light-reflecting layer, a light-shielding layer, and an ink-printable layer, in order. The light-shielding layer is prepared essentially from a binder polymer and zinc sulfide particles, so that an ink, particularly an aqueous ink solution, applied onto the ink-printable layer gives a clear ink image with almost no blur.Type: GrantFiled: March 20, 2000Date of Patent: January 15, 2002Assignee: Fuji Photo Film Co., Ltd.Inventors: Michihiro Shibata, Toshihiko Miura, Takashi Suda
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Publication number: 20010007721Abstract: A ferromagnetic metal powder comprises: a metal portion comprising Fe; and an oxide layer around the metal portion, wherein the oxide layer comprises an iron oxide having magnetism such that the saturation magnetization is from 50 to 95 A.m2/kg.Type: ApplicationFiled: December 18, 2000Publication date: July 12, 2001Inventors: Noboru Zinbo, Toshihiko Miura
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Patent number: 5770302Abstract: A magnetic recording medium is disclosed, which comprises a nonmagnetic support having thereon a magnetic layer containing at least ferromagnetic metal particles, wherein said ferromagnetic metal particles have a coercive force of from 1,700 to 3,000 Oe, an average long axis length of from 30 to 80 nm, an average acicular ratio of from 2.0 to 5.0, and a crystallinity of from 30 to 100%.Type: GrantFiled: October 4, 1996Date of Patent: June 23, 1998Assignee: Fuji Photo Film Co., Ltd.Inventors: Kouichi Masaki, Toshihiko Miura
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Patent number: 5698311Abstract: A magnetic recording medium comprising a nonmagnetic support having provided thereon at least a magnetic layer containing ferromagnetic metal particles, wherein the magnetic layer has a coercive force of 2,000 to 3,000 Oe and a Bm of 3,800 to 5,500 G, the ferromagnetic metal particles has an average major axis length of 0.05 to 0.12 .mu.m and an average aspect ratio of 4.0 to 10.0, the average number of crystallites constituting the ferromagnetic metal particles per particle is from 2.0 to 5.0, and the crystallites has an average aspect ratio of 1.0 to 2.0.Type: GrantFiled: July 1, 1996Date of Patent: December 16, 1997Assignee: Fuji Photo Film Co., Ltd.Inventors: Kouichi Masaki, Toshihiko Miura
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Patent number: 5582910Abstract: A magnetic recording medium having improved electromagnetic characteristics and running properties is disclosed. The magnetic recording medium comprises a non-magnetic support having thereon a plurality of magnetic layers consisting of two or more layers composed of a first lower magnetic layer and a second upper magnetic layer, provided on said support by either co-coating the lower magnetic layer and the upper magnetic layer in the wet state, or coating the lower magnetic layer and then the upper magnetic layer while the lower magnetic layer is still in the wet state; wherein the cobalt-modified iron oxide is employed as the ferromagnetic powder contained in the lower magnetic layer, ferromagnetic metal is employed as the ferromagnetic powder contained in the upper magnetic layer, both the ferromagnetic powder contained in the lower magnetic layer and the ferromagnetic powder contained in the upper magnetic layer having an average major axis length of 0.25 .mu.Type: GrantFiled: February 6, 1995Date of Patent: December 10, 1996Assignee: Fuji Photo Film Co., Ltd.Inventors: Hiroaki Araki, Kenichi Masuyama, Kazuo Kato, Yasuyuki Tanaka, Toshihiko Miura