Patents by Inventor Naoki Shiraishi
Naoki Shiraishi 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: 10539562Abstract: Provided is a testing device including: a porous flow path member in which a flow path for flowing a sample is formed; and a resin layer provided at at least one position over the flow path member, wherein the resin layer is a porous body formed of a hydrophobic material, and wherein a reagent reactive with the sample is formed as a solid phase over a surface of the resin layer facing the flow path member and inside voids of the resin layer.Type: GrantFiled: December 18, 2017Date of Patent: January 21, 2020Assignee: Ricoh Company, Ltd.Inventors: Rie Kobayashi, Naoki Shiraishi
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Publication number: 20190302633Abstract: A discharge device is provided. The discharge device includes a liquid feed-discharger, and the liquid feed-discharger includes a feed unit configured to feed a liquid and a discharge unit having discharge holes configured to discharge the liquid fed by the feed unit. A ratio (X/Y) of a maximum cross-sectional area X (mm2) to a minimum cross-sectional area Y (mm2) of the liquid feed-discharger in a direction orthogonal to an axial direction of the liquid feed-discharger is from 1 to 5.Type: ApplicationFiled: March 22, 2019Publication date: October 3, 2019Inventors: Tadahiko MORINAGA, Tatsuru MORITANI, Naoki SHIRAISHI, Shinji AOKI, Hisayoshi OHSHIMA, Yuichi SATO
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Publication number: 20190292395Abstract: A main object of the present invention is to provide an ink composition for ink-jet recording capable of forming an ink film excellent in both film strength and scratch resistance. The present invention achieves the object by providing an ink composition for ink-jet recording comprising: an aqueous solvent including water and water-soluble organic solvent; a coloring agent; a resin emulsion; and a surfactant; wherein the resin emulsion includes a silicon-acrylic resin emulsion and a resin emulsion other than the silicon-acrylic resin emulsion; a content ratio of the resin emulsion to the coloring agent (content of the resin emulsion/content of the coloring agent) is 1/5 or more and 15/1 or less; and a content ratio of the silicon-acrylic resin emulsion to the coloring agent (content of the silicon-acrylic resin emulsion/content of the coloring agent) is 1/20 or more and 5/1 or less.Type: ApplicationFiled: November 8, 2016Publication date: September 26, 2019Inventors: Kisei MATSUMOTO, Naoki SHIRAISHI, Kentaro OTOMO, Fumie YAMAZAKI, Yukio SUGITA
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Publication number: 20190293927Abstract: An optical deflector includes a movable portion having a reflecting surface, an elastic member configured to swingably support the movable portion about a swinging axis, and a support portion configured to support the elastic member. The movable portion includes a first movable plate including the reflecting surface, and a second movable plate including a driving force generating surface. The first movable plate includes at least one first rib formed on a back surface of the reflecting surface. The second movable plate includes at least one second rib formed on a back surface of the driving force generating surface. The first rib and the second rib are configured to intersect each other. Part of the first rib and part of the second rib are bonded.Type: ApplicationFiled: June 12, 2019Publication date: September 26, 2019Applicant: OLYMPUS CORPORATIONInventor: Naoki SHIRAISHI
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Publication number: 20190292333Abstract: A method for manufacturing resin particles is provided. The method includes the steps of: dissolving a resin free of poly(lactic-co-glycolic acid) (PLGA) in a good solvent of the resin to prepare a resin solution; and discharging the resin solution from at least one discharge hole having an inner diameter of less than 1,000 ?m into a poor solvent of the resin to form resin particles.Type: ApplicationFiled: March 25, 2019Publication date: September 26, 2019Inventors: Tatsuru MORITANI, Naoki SHIRAISHI, Tadahiko MORINAGA
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Publication number: 20190283607Abstract: The present invention enhances instant readability by causing a driver to visually recognize, without a feeling of stranger an image obtained by photographing an area around a vehicle. A display section (11, 12, 13) is provided ahead of a driver, and the display section displays an image, obtained by photographing an area around an automobile (1), so that the image is recognized to be located on a deeper side away from the driver, an amount, by which a visible object is recognized to be located on a deeper side than a display screen, corresponding to a distance which causes the driver to recognize the visible object reflected by a mirror.Type: ApplicationFiled: November 24, 2017Publication date: September 19, 2019Inventors: TAKEHIRO MURAO, RYOH KIKUCHI, TAKAYUKI YAMADA, TAKEHIKO NAKAGAWA, YOSHIMITSU INAMORI, NAOKI SHIRAISHI
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Publication number: 20190247314Abstract: A particle-producing method is provided including the processes of: discharging a liquid from discharge holes provided on a liquid-storing unit storing the liquid to make the liquid into droplets, the liquid containing a physiologically active substance and a polymer; and solidifying the droplets into a particle.Type: ApplicationFiled: February 6, 2019Publication date: August 15, 2019Applicant: Ricoh Company, Ltd.Inventors: Naoki SHIRAISHI, Tatsuru MORITANI, Tadahiko MORINAGA
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Patent number: 10253196Abstract: Provided is an inkjet recording ink composition which has excellent water resistance and solvent resistance and also has excellent ejection stability. Disclosed is an inkjet recording ink composition which contains a resin having an acid value of less than 10 mg KOH/g, an amino alcohol having a boiling point of 100° C. or more and 300° C. or less, a pigment, and a solvent, in which the resin is in an emulsion state.Type: GrantFiled: September 2, 2014Date of Patent: April 9, 2019Assignee: DNP FINE CHEMICALS CO., LTD.Inventors: Yukio Sugita, Fumie Yamazaki, Masaki Inumaru, Kisei Matsumoto, Naoki Shiraishi
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Publication number: 20180172679Abstract: Provided is a testing device including: a porous flow path member in which a flow path for flowing a sample is formed; and a resin layer provided at at least one position over the flow path member, wherein the resin layer is a porous body formed of a hydrophobic material, and wherein a reagent reactive with the sample is formed as a solid phase over a surface of the resin layer facing the flow path member and inside voids of the resin layer.Type: ApplicationFiled: December 18, 2017Publication date: June 21, 2018Inventors: Rie Kobayashi, Naoki Shiraishi
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Patent number: 9944810Abstract: Provided is an aqueous ink jet-use ink composition which includes a binder resin, a surfactant, a pigment, a solvent and, if necessary, a pigment-dispersing resin. The binder resin has a glass transition temperature of 40-90° C. and is dispersed as resin emulsion particles. The value of A, which is defined as the sum of the product of the acid value and the content in terms of parts by mass of the binder resin and pigment-dispersing resin, is 0-200 mg KOH/g. The surfactant is a non-ionic compound represented by formula (1), and the content of solvents having boiling points of 250° C. or higher is less than 5 parts by mass relative to 100 parts by mass of the ink composition. R1O—(R2O)n—H??(1) R1 is a straight-chain or branched chain alkyl group having 12-22 carbon atoms. R2 is an ethylene group or propylene group. n is an integer between 10 and 50.Type: GrantFiled: March 11, 2016Date of Patent: April 17, 2018Assignee: DNP Fine Chemicals Co., Ltd.Inventors: Fumie Yamazaki, Akiko Kobayashi, Naoki Shiraishi, Kisei Matsumoto, Kentaro Otomo, Yukio Sugita
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Publication number: 20180030298Abstract: Provided is an aqueous ink jet-use ink composition which includes a binder resin, a surfactant, a pigment, a solvent and, if necessary, a pigment-dispersing resin. The binder resin has a glass transition temperature of 40-90° C. and is dispersed as resin emulsion particles. The value of A, which is defined as the sum of the product of the acid value and the content in terms of parts by mass of the binder resin and pigment-dispersing resin, is 0-200 mg KOH/g. The surfactant is a non-ionic compound represented by formula (1), and the content of solvents having boiling points of 250° C. or higher is less than 5 parts by mass relative to 100 parts by mass of the ink composition. R1O—(R2O)n—H??(1) R1 is a straight-chain or branched chain alkyl group having 12-22 carbon atoms. R2 is an ethylene group or propylene group. n is an integer between 10 and 50.Type: ApplicationFiled: March 11, 2016Publication date: February 1, 2018Applicant: DNP Fine Chemicals Co., Ltd.Inventors: Fumie Yamazaki, Akiko Kobayashi, Naoki Shiraishi, Kisei Matsumoto, Kentaro Otomo, Yukio Sugita
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Publication number: 20160376452Abstract: Provided is an inkjet recording ink composition which has excellent water resistance and solvent resistance and also has excellent ejection stability. Disclosed is an inkjet recording ink composition which contains a resin having an acid value of less than 10 mg KOH/g, an amino alcohol having a boiling point of 100° C. or more and 300° C. or less, a pigment, and a solvent, in which the resin is in an emulsion state.Type: ApplicationFiled: September 2, 2014Publication date: December 29, 2016Applicant: DNP FINE CHEMICALS CO., LTD.Inventors: Yukio SUGITA, Fumie YAMAZAKI, Masaki INUMARU, Kisei MATSUMOTO, Naoki SHIRAISHI
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Publication number: 20150307687Abstract: Provided is an inkjet maintenance fluid that is stable and very safe, exhibits good ink-cleaning performance, and is widely applicable to a variety of types of inkjet ink. This inkjet maintenance fluid contains water, a water-soluble organic solvent containing 1,3-propanediol, and a surfactant. The water-soluble organic solvent preferably constitutes at least 20% of the mass of the maintenance fluid, and 1,3-propanediol preferably constitutes at least 30% of the mass of the water-soluble organic solvent. Even low-HLB surfactants are dissolved well, allowing application to a wide range of inkjet inks.Type: ApplicationFiled: October 10, 2013Publication date: October 29, 2015Inventors: Fumie Yamazaki, Kisei Matsumoto, Masaki Inumaru, Naoki Shiraishi
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Patent number: 8841356Abstract: Disclosed is an ink composition which has superior storage stability, is resistant to bleeding, has good fixability to paper, and enables printing of a clear image. The ink composition includes a pigment dispersion containing a surface-treated pigment and a resin emulsion, wherein the surface-treated pigment is obtained by binding a functional group, having a larger calcium index than a calcium index of 1,2,3-benzenetricarboxylic acid, to the surface of a pigment; and the resin emulsion is adapted so that an aqueous solution containing 1 mass % of a solid content of the resin emulsion has a conductance of 300 ?S/cm or less.Type: GrantFiled: September 30, 2010Date of Patent: September 23, 2014Assignee: DNP Fine Chemicals Co., Ltd.Inventors: Satoshi Shioda, Tatsuro Ishitobi, Takao Otomaru, Rumiko Matsuo, Masaki Inumaru, Yukio Sugita, Fumie Yamazaki, Naoki Shiraishi, Mitsuyoshi Tamura, Ataru Miyata
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Patent number: 8814335Abstract: An inkjet recording method characterized by adhering a receiving solution (A) to at least areas on a recording medium (R) which are to be printed with an inkjet ink (I) or the whole surface of the medium (R) which is to be printed, said receiving solution (A) being a solution obtained by dissolving (inclusive of dispersing) one or more metal salts (S) selected from among at least divalent, calcium salts, magnesium salts, nickel salts, aluminum salts, boron salts, and zinc salts and one or more resins (B) having hydrophilic groups in an aqueous solvent in such amounts that the concentrations of the metal salts (S) and the resins (B) fall within the range of 0.005 to 2.0 mol/l and within the range of 0.5 to 20 mass % respectively, and then applying the inkjet ink (1) to areas where the metal salts are present in an adhered state to carry out printing.Type: GrantFiled: March 27, 2012Date of Patent: August 26, 2014Assignee: DNP Fine Chemicals Co., Ltd.Inventors: Masaki Inumaru, Takao Otomaru, Yukio Sugita, Mitsuyoshi Tamura, Fumie Yamazaki, Naoki Shiraishi, Yoshiki Nozaka
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Publication number: 20140132661Abstract: Provided is an inkjet recording method which minimizes blur and achieves excellent fixing to a recoding medium. This inkjet recording method is characterized by adhering a receiving solution (A) to at least areas on a recording medium (R) which are to be printed with an inkjet ink (I) or the whole surface of the medium (R) which is to be printed, said receiving solution (A) being a solution obtained by dissolving (inclusive of dispersing) one or more metal salts (S) selected from among at least divalent, calcium salts, magnesium salts, nickel salts, aluminum salts, boron salts, and zinc salts and one or more resins (B) having hydrophilic groups in an aqueous solvent in such amounts that the concentrations of the metal salts (S) and the resins (B) fall within the range of 0.005 to 2.0 mol/l and within the range of 0.5 to 20 mass % respectively, and then applying the inkjet ink (I) to areas where the metal salts are present in an adhered state to carry out printing.Type: ApplicationFiled: March 27, 2012Publication date: May 15, 2014Applicants: DNP FINE CHEMICALS CO., LTD., DAI NIPPON PRINTING CO., LTD.Inventors: Yoshiki NOZAKA, Fumie YAMAZAKI, Mitsuyoshi TAMURA, Yukio SUGITA, Takao OTOMARU, Masaki INUMARU, Naoki SHIRAISHI
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Publication number: 20140055520Abstract: An inkjet recording method which suppresses feathering and color bleeding and is excellent in fixability to a recording medium. The inkjet recording method includes the steps of applying an ink-receiving solution prepared by dissolving in an aqueous solvent at least one metal salt having a water solubility of 0.1 mol/l or more, selected from calcium salts, magnesium salts, nickel salts and zinc salts having a valence of 2 or more, to at least the surface to be printed by using an inkjet ink or the entire surface of a recording medium; and printing on the metal salt adhered part by using the inkjet ink comprising at least a pigment, a resin emulsion and an aqueous solvent containing a surfactant. Further, a phosphorus-containing group having at least one P—O or P?O bond is bound to the surface of the pigment.Type: ApplicationFiled: December 26, 2011Publication date: February 27, 2014Applicants: DNP FINE CHEMICALS CO., LTD., DAI NIPPON PRINTING CO., LTD.Inventors: Masaki Inumaru, Satoshi Shioda, Takao Otomaru, Yukio Sugita, Mitsuyoshi Tamura, Fumie Yamazaki, Naoki Shiraishi
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Patent number: 8557032Abstract: The object of the invention is to provide an inkjet recording oil green ink composition that excels more in terms of all the quality of prints, stability on printing, the ability of prints to be dried, and ink storage stability, and is capable of making wider a color reproduction area expressed by yellow and cyan. The inkjet recording oil green ink composition contains as an organic green pigment coloring agent C. I. Pigment Green 58 comprising a (poly) halogenated zinc phthalocyanine. The invention also provides an ink set comprises the inventive oil green ink composition and further includes at least an oil yellow ink composition and an oil cyan ink composition.Type: GrantFiled: March 24, 2009Date of Patent: October 15, 2013Assignee: The Inctec Inc.Inventors: Yukio Sugita, Mitsuyoshi Tamura, Fumie Yamazaki, Mitsuteru Yamada, Naoki Shiraishi
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Publication number: 20120308786Abstract: Disclosed is an ink composition which has superior storage stability, is resistant to bleeding, has good fixability to paper, and enables printing of a clear image. The ink composition includes a pigment dispersion containing a surface-treated pigment and a resin emulsion, wherein the surface-treated pigment is obtained by binding a functional group, having a larger calcium index than a calcium index of 1,2,3-benzenetricarboxylic acid, to the surface of a pigment; and the resin emulsion is adapted so that an aqueous solution containing 1 mass % of a solid content of the resin emulsion has a conductance of 300 ?S/cm or less.Type: ApplicationFiled: September 30, 2010Publication date: December 6, 2012Inventors: Satoshi Shioda, Tatsuro Ishitobi, Takao Otomaru, Rumiko Matsuo, Eiichi Miyata, Ataru Miyata, Masaki Inumaru, Yukio Sugita, Fumie Yamazaki, Naoki Shiraishi, Mitsuyoshi Tamura
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Patent number: 7806972Abstract: The object of the invention is to provide an oil ink set capable of obtaining images having high color reproduction capabilities and high color saturation in particular. The oil ink set of the invention comprises a firsts a second, and a third oil ink having a wavelength region in which the reflectivity of each oil ink on a recording medium changes from 80% to 5% in the wavelength range of 400 nm to 700 nm. In this wavelength region, the reflectivity of the first oil ink is continuously higher than that of the first oil ink, and in the wavelength in which the reflectivity of the second oil ink changes from 80% to 5%, the reflectivity of the third oil ink is continuously higher than that of the second oil ink. Moreover, the coloring materials in the first, the second and the third oil inks are all different.Type: GrantFiled: March 24, 2009Date of Patent: October 5, 2010Assignee: The Intec Inc.Inventors: Yukio Sugita, Mitsuyoshi Tamura, Fumie Yamazaki, Mitsuteru Yamada, Naoki Shiraishi