Patents by Inventor Tomomi Tamura
Tomomi Tamura 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: 10930488Abstract: A mass spectrometer, includes: a sampling probe that irradiates a specimen disposed in the atmosphere with an electron and obtains a sample separated from the specimen; and a measurement unit that performs mass spectrometry of the sample obtained by the sampling probe, wherein the sampling probe comprises: a casing having an opening which is opened to the atmosphere and an outlet through which the sample is discharged to the measurement unit; and a surface emission type electron emission element housed in the casing such that an electron emission surface thereof opposes to the opening.Type: GrantFiled: March 10, 2020Date of Patent: February 23, 2021Assignee: SHIMADZU CORPORATIONInventors: Osamu Furuhashi, Tomomi Tamura, Kiyoshi Ogawa
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Publication number: 20210042943Abstract: A scanning electron microscope is provided that is capable of displaying an image highly visible for a user when an image is displayed by visualization by combining morphological image information with component image information.Type: ApplicationFiled: August 5, 2020Publication date: February 11, 2021Inventors: Ryuta MATSUMOTO, Kiyoshi OGAWA, Tomomi TAMURA, Hiroki MAEDA
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Publication number: 20200328071Abstract: A mass spectrometer, includes: a sampling probe that irradiates a specimen disposed in the atmosphere with an electron and obtains a sample separated from the specimen; and a measurement unit that performs mass spectrometry of the sample obtained by the sampling probe, wherein the sampling probe comprises: a casing having an opening which is opened to the atmosphere and an outlet through which the sample is discharged to the measurement unit; and a surface emission type electron emission element housed in the casing such that an electron emission surface thereof opposes to the opening.Type: ApplicationFiled: March 10, 2020Publication date: October 15, 2020Applicant: SHIMADZU CORPORATIONInventors: Osamu FURUHASHI, Tomomi TAMURA, Kiyoshi OGAWA
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Patent number: 9589760Abstract: An object of the invention is to provide an X-ray generator having a simple configuration where heat generated in the irradiation window can be prevented from conducting to a desired portion in accordance with the purpose of use, the method of use or the structure of the X-ray tube. In an X-ray generator for releasing X-rays generated by irradiating a target placed in a vacuumed atmosphere within an X-ray tube with an electron beam from an electron source through an irradiation window of the X-ray tube, the irradiation window has thermal anisotropy where the thermal conductivity is different between the direction in which the irradiation window spreads and the direction of the thickness of the irradiation window, and therefore, the thermal conductivity in the direction in which the heat from the irradiation window is desired not to conduct is made relatively smaller.Type: GrantFiled: September 30, 2014Date of Patent: March 7, 2017Assignee: SHIMADZU CORPORATIONInventors: Akihiro Miyaoka, Tomomi Tamura, Hiroki Maeda
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Publication number: 20150103979Abstract: An object of the invention is to provide an X-ray generator having a simple configuration where heat generated in the irradiation window can be prevented from conducting to a desired portion in accordance with the purpose of use, the method of use or the structure of the X-ray tube. In an X-ray generator for releasing X-rays generated by irradiating a target placed in a vacuumed atmosphere within an X-ray tube with an electron beam from an electron source through an irradiation window of the X-ray tube, the irradiation window has thermal anisotropy where the thermal conductivity is different between the direction in which the irradiation window spreads and the direction of the thickness of the irradiation window, and therefore, the thermal conductivity in the direction in which the heat from the irradiation window is desired not to conduct is made relatively smaller.Type: ApplicationFiled: September 30, 2014Publication date: April 16, 2015Applicant: SHIMADZU CORPORATIONInventors: Akihiro MIYAOKA, Tomomi TAMURA, Hiroki MAEDA
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Patent number: 8213575Abstract: According to the X-ray generating apparatus of this invention, a potential corresponding to that of a housing is applied to a first electrode, closest to a cathode, of at least two intermediate electrodes arranged between the cathode and a target. Therefore, even if the first electrode with an increased thermal capacity contacts the housing, the function of the X-ray generating apparatus will never be impaired. As a result, the first electrode is not easily restricted by structure, so that the first electrode may be enlarged as a measure for heat radiation, or that the first electrode may be placed in contact with the housing. The first electrode contacting the housing determines a positional relationship of the electron gun and housing to facilitate assembly of the X-ray generating apparatus. Further, all the potentials of the cathode, intermediate electrodes (e.g.Type: GrantFiled: November 21, 2006Date of Patent: July 3, 2012Assignee: Shimadzu CorporationInventors: Tomomi Tamura, Takumi Kobayashi
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Publication number: 20100067664Abstract: According to the X-ray generating apparatus of this invention, a potential corresponding to that of a housing is applied to a first electrode, closest to a cathode, of at least two intermediate electrodes arranged between the cathode and a target. Therefore, even if the first electrode with an increased thermal capacity contacts the housing, the function of the X-ray generating apparatus will never be impaired. As a result, the first electrode is not easily restricted by structure, so that the first electrode may be enlarged as a measure for heat radiation, or that the first electrode may be placed in contact with the housing. The first electrode contacting the housing determines a positional relationship of the electron gun and housing to facilitate assembly of the X-ray generating apparatus. Further, all the potentials of the cathode, intermediate electrodes (e.g.Type: ApplicationFiled: November 21, 2006Publication date: March 18, 2010Inventors: Tomomi Tamura, Takumi Kobayashi
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Patent number: 7344812Abstract: A developer for developing an electrostatic latent image, including a carrier which includes core particles, and a surface layer surrounding each of the core particles and containing an acrylic resin binder; and a toner which includes toner particles and an external additive of inorganic or organic fine particles present on each of the toner particles. Each of the toner particles comprises a colorant, a matrix of a first resin, and a plurality of domains of a second resin dispersed in the matrix and containing a wax. The first resin is substantially free of tetrahydrofuran insoluble matters and has a weight average molecular weight of 3,000 to 90,000.Type: GrantFiled: March 20, 2003Date of Patent: March 18, 2008Assignee: Ricoh Company, Ltd.Inventors: Kohsuke Suzuki, Satoshi Mochizuki, Tomio Kondou, Masahide Yamashita, Tomomi Tamura, Takayuki Koike
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Patent number: 7340036Abstract: An X-ray generator includes an electron source generating an electron beam, a target generating an X-ray by a collision of the electron beam and extending in a direction orthogonal to the electron beam, and a cylindrical electrode covering a collision portion of the target to which the electron beam collides and having a bore allowing the electron beam to pass through. The electron source and the target are arranged in such a way that the X-ray is radiated in the direction orthogonal to an optical axis of the electron beam. A depression equivalent to a notch of the target is provided in a collision face side of the electron beam on the target and also in a reverse location of a tip of the target located on an outgoing radiation side of the X-ray relative to a collision location of the electron beam on the target.Type: GrantFiled: June 22, 2007Date of Patent: March 4, 2008Assignee: Shimadzu CorporationInventors: Sadamu Tomita, Tomomi Tamura, Hidenobu Ishida
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Publication number: 20070258565Abstract: An X-ray generator includes an electron source generating an electron beam, a target generating an X-ray by a collision of the electron beam and extending in a direction orthogonal to the electron beam, and a cylindrical electrode covering a collision portion of the target to which the electron beam collides and having a bore allowing the electron beam to pass through. The electron source and the target are arranged in such a way that the X-ray is radiated in the direction orthogonal to an optical axis of the electron beam. A depression equivalent to a notch of the target is provided in a collision face side of the electron beam on the target and also in a reverse location of a tip of the target located on an outgoing radiation side of the X-ray relative to a collision location of the electron beam on the target.Type: ApplicationFiled: June 22, 2007Publication date: November 8, 2007Applicant: SHIMADZU CORPORATIONInventors: Sadamu Tomita, Tomomi Tamura, Hidenobu Ishida
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Patent number: 7169522Abstract: The toner for developing a latent electrostatic image to form an image contains a binder resin and 2% by weight to 15% by weight of a coloring agent. The coverage of the toner with the coloring agent on a surface of the toner is 1.5% by atom to 15% by atom. The toner prevents scatterings and toner deposition on the background of images and provides high quality images even after printing several tens of sheets at high temperature and in high humidity.Type: GrantFiled: March 12, 2003Date of Patent: January 30, 2007Assignee: Ricoh Company, Ltd.Inventors: Hideki Sugiura, Satoshi Mochizuki, Yasuo Asahina, Kazuhiko Umemura, Minoru Masuda, Tomomi Tamura
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Patent number: 6902858Abstract: An image formation apparatus develops an electrostatic latent image with a two-component developer consisting of magnetic carriers and toners by using a development apparatus and a latent image supporter including a filler in an outermost layer thereof, the development apparatus having a developer supporter, which has an internally fixed magnetic body and rotates while supporting a developer on a surface thereof, and a developer quantity controller controlling a quantity of the developer which is supported by the developer supporter facing the magnetic body and controlling a height of magnetic brushes and consisting of materials having rigidity or rigidity and magnetic properties, wherein a ratio (Gp/Gd) of a development gap to a doctor gap between the developer supporter and the controller is from 0.7 to 1.0, and a weight-averaged particle diameter of a developer carrier is from 20 to 60 ?m.Type: GrantFiled: March 19, 2004Date of Patent: June 7, 2005Assignee: Ricoh Company, Ltd.Inventors: Satoshi Mochizuki, Naohito Shimota, Hiroaki Matsuda, Shinichiro Yagi, Tomomi Tamura, Tatsuya Niimi
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Patent number: 6902857Abstract: A method for forming an electrophotographic image and a device for forming an image on a transfer material by the steps for charging, exposing, developing and transferring, and recovering the toner remained untransferred in the step for cleaning by recovering, wherein the toner used in the step for developing has a total surface area ratio Z of additive, which is calculated by Z=(Ht·Wt)/(H·W), satisfies 0.5?Z?1.5, the electrophotographic photoconductor used comprises at least a photosensitive layer and a filler-containing protective layer provided on a conductive support in that order, and the angle of repose of the toner to the protective layer surface of the electrophotographic photoconductor is 30° or less.Type: GrantFiled: June 24, 2002Date of Patent: June 7, 2005Assignee: Ricoh Company, Ltd.Inventors: Shinichiro Yagi, Naohito Shimota, Tatsuya Niimi, Satoshi Mochizuki, Hiroaki Matsuda, Tomomi Tamura
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Patent number: 6828075Abstract: A carrier for electrophotographic developer comprising carrier particles, each carrier particle having at least one surface-coating layer by resin material, wherein the surface-coating layer containing an acrylic resin and a silicone resin, the acrylic resin is in an amount ranging 10 to 90 wt. % based on the total amount of resin coating ingredients. The carrier shows no accumulation of toner-spents, therefore can obtain a stable electric charge, and has no layer scraping in binder resin layer, therefore can obtain a stable electric resistance, hence occurs no deterioration of images reproduced, by using acrylic resin having high anti-abrasive and high surface energy, whereas it has strong adhesiveness and high fragility, in combination use of silicone resin having poor anti-abrasive and small adhesiveness but has low fragility, thus is hard to cause a toner spent and hard to integrate the spent constituents due to its low surface energy.Type: GrantFiled: May 24, 2002Date of Patent: December 7, 2004Assignee: Ricoh Company, Ltd.Inventors: Kousuke Suzuki, Satoshi Mochizuki, Yasuo Asahina, Kazuhiko Umemura, Hideki Sugiura, Minoru Masuda, Tomomi Tamura
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Patent number: 6818369Abstract: A toner for electrostatic image development in which the weight concentration of polar-solvent-soluble material is 1000 &mgr;g/g or less, based on the toner, and an image forming method comprising a step of forming a toner image by developing a latent electrostatic image by using the toner for electrostatic image development.Type: GrantFiled: January 31, 2002Date of Patent: November 16, 2004Assignee: Ricoh Company, Ltd.Inventors: Hideki Sugiura, Satoshi Mochizuki, Yasuo Asahina, Kazuhiko Umemura, Minoru Masuda, Kohsuke Suzuki, Tomomi Tamura
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Publication number: 20040179861Abstract: An image formation apparatus develops an electrostatic latent image with a two-component developer consisting of magnetic carriers and toners by using a development apparatus and a latent image supporter including a filler in an outermost layer thereof, the development apparatus having a developer supporter, which has an internally fixed magnetic body and rotates while supporting a developer on a surface thereof, and a developer quantity controller controlling a quantity of the developer which is supported by the developer supporter facing the magnetic body and controlling a height of magnetic brushes and consisting of materials having rigidity or rigidity and magnetic properties, wherein a ratio (Gp/Gd) of a development gap to a doctor gap between the developer supporter and the controller is from 0.7 to 1.0, and a weight-averaged particle diameter of a developer carrier is from 20 to 60 &mgr;m.Type: ApplicationFiled: March 19, 2004Publication date: September 16, 2004Inventors: Satoshi Mochizuki, Naohito Shimota, Hiroaki Matsuda, Shinichiro Yagi, Tomomi Tamura, Tatsuya Niimi
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Patent number: 6770411Abstract: A toner including a binder resin, a colorant, and a product of an iron compound containing an aromatic hydroxylcarboxylic acid as a ligand and represented by the formula (I) described in the specification, wherein the product has such a characteristic that a filtrate obtained by filtering a dispersion of 10 g of the product dispersed in 200 ml of purified water provides an electric conductivity of not greater than 600 &mgr;S/cm.Type: GrantFiled: March 28, 2002Date of Patent: August 3, 2004Assignee: Ricoh Company, Ltd.Inventors: Minoru Masuda, Satoshi Mochizuki, Yasuo Asahina, Kazuhiko Umemura, Hideki Sugiura, Kohsuke Suzuki, Tomomi Tamura
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Patent number: 6757507Abstract: An image formation apparatus develops an electrostatic latent image with a two-component developer consisting of magnetic carriers and toners by using a development apparatus and a latent image supporter including a filler in an outermost layer thereof, the development apparatus having a developer supporter, which has an internally fixed magnetic body and rotates while supporting a developer on a surface thereof, and a developer quantity controller controlling a quantity of the developer which is supported by the developer supporter facing the magnetic body and controlling a height of magnetic brushes and consisting of materials having rigidity or rigidity and magnetic properties, wherein a ratio (Gp/Gd) of a development gap to a doctor gap between the developer supporter and the controller is from 0.7 to 1.0, and a weight-averaged particle diameter of a developer carrier is from 20 to 60 &mgr;m.Type: GrantFiled: December 19, 2001Date of Patent: June 29, 2004Assignee: Ricoh Company, Ltd.Inventors: Satoshi Mochizuki, Naohito Shimota, Hiroaki Matsuda, Shinichiro Yagi, Tomomi Tamura, Tatsuya Niimi
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Publication number: 20030232266Abstract: A toner for developing a latent electrostatic image which includes a binder resin and a coloring agent. In the toner, a coverage with the coloring agent on a surface of the toner is 1.5% by atom to 15% by atom, and the toner contains 2% by weight to 15% by weight of the coloring agent.Type: ApplicationFiled: March 12, 2003Publication date: December 18, 2003Inventors: Hideki Sugiura, Satoshi Mochizuki, Yasuo Asahina, Kazuhiko Umemura, Minoru Masuda, Tomomi Tamura
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Publication number: 20030186154Abstract: A carrier for electrophotographic developer comprising carrier particles, each carrier particle having at least one surface-coating layer by resin material, wherein the surface-coating layer containing an acrylic resin and a silicone resin, the acrylic resin is in an amount ranging 10 to 90 wt. % based on the total amount of resin coating ingredients. The carrier shows no accumulation of toner-spents, therefore can obtain a stable electric charge, and has no layer scraping in binder resin layer, therefore can obtain a stable electric resistance, hence occurs no deterioration of images reproduced, by using acrylic resin having high anti-abrasive and high surface energy, whereas it has strong adhesiveness and high fragility, in combination use of silicone resin having poor anti-abrasive and small adhesiveness but has low fragility, thus is hard to cause a toner spent and hard to integrate the spent constituents due to its low surface energy.Type: ApplicationFiled: May 24, 2002Publication date: October 2, 2003Inventors: Kousuke Suzuki, Satoshi Mochizuki, Yasuo Asahina, Kazuhiko Umemura, Hideki Sugiura, Minoru Masuda, Tomomi Tamura