Patents by Inventor Naohiro Fujita

Naohiro Fujita 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).

  • Patent number: 11112734
    Abstract: A belt device includes a belt wound around a plurality of rollers, one of the plurality of rollers, and a belt contact member disposed on the one of the plurality of rollers. The belt rotates along with the plurality of rollers. The belt contact member faces an edge of the belt in an axial direction of the one of the plurality of rollers and includes a flat portion and a separation portion. The flat portion forms a plane perpendicular to the axial direction of the one of the plurality of rollers. The separation portion is disposed outboard of the flat portion in a radial direction of the one of the plurality of rollers and has a surface located farther from the edge of the belt than the flat portion in the axial direction of the one of the plurality of rollers.
    Type: Grant
    Filed: March 17, 2020
    Date of Patent: September 7, 2021
    Assignee: RICOH COMPANY, LTD.
    Inventors: Naohiro Kumagai, Masanari Fujita, Katsuya Kawagoe, Masaharu Furuya, Hiroki Nakamatsu, Yoshiki Hozumi
  • Publication number: 20210163733
    Abstract: Provided is a resin composition that is capable of producing a cured product having excellent environmental suitability, high strength, and excellent flame retardancy, and that is suitably usable as a matrix resin for fiber-reinforced plastics. A resin composition contains (A) an epoxy resin, (B) a cyanate resin, (C) an aromatic amine curing agent that is liquid at 25° C., and (D) a phosphorus-containing compound represented by formula (1). Preferably, in formula (1), R1 and R2 each independently represent an alkyl group or an aryl group, and X and Y are an oxygen atom.
    Type: Application
    Filed: June 27, 2019
    Publication date: June 3, 2021
    Inventors: Masato INADOME, Naohiro FUJITA, Kazuhide MORINO, Chihiro ASAKURA
  • Publication number: 20210130538
    Abstract: The present invention provides a resin composition for a fiber-reinforced plastic, the resin composition including a cyanate ester (A), an epoxy resin (B), and an aromatic amine-based curing agent that is liquid at 25° C. (C), wherein the average number of cyanate groups in the cyanate ester (A) is 2.1 or greater, and/or the average number of epoxy groups in the epoxy resin (B) is 2.1 or greater. A fiber-reinforced plastic that is produced using this composition and a reinforcing fiber has favorable heat resistance and excellent tensile and bending properties, and therefore can be applied to a wide variety of fields including transport vehicles such as ships, automobiles, and aircrafts, sporting goods, building materials such as sinks and window frames, as well as industrial machinery and materials such as high-pressure gas tanks and blades for wind power generation.
    Type: Application
    Filed: February 26, 2018
    Publication date: May 6, 2021
    Inventors: Masato INADOME, Naohiro FUJITA, Kazuhide MORINO
  • Patent number: 10988928
    Abstract: A binding beam includes a steel form having a bottom plate portion and a pair of side plate portions extending upward from both ends of the bottom plate portion and binding beam concrete placed in a groove portion configured by the bottom plate portion and the pair of side plate portions of the steel form.
    Type: Grant
    Filed: August 23, 2019
    Date of Patent: April 27, 2021
    Assignees: TAKENAKA CORPORATION, JFE STEEL CORPORATION, JFE METAL PRODUCTS CORPORATION
    Inventors: Takayuki Hirayama, Kazuto Nakahira, Hirokazu Nozawa, Yuuichirou Okuno, Takahiro Machinaga, Naohiro Fujita, Hiroto Takatsu, Kenji Yamazaki, Yukio Murakami, Tomohiro Kinoshita, Takanori Shimizu, Seishi Watanabe, Hiroori Yasuoka
  • Patent number: 10557002
    Abstract: A resin composition for fiber reinforced plastic which is a resin composition comprising an epoxy resin (A), a cyanate resin (B) and a liquid aromatic amine curing agent (C), and, as necessary, further an active energy radiation absorbable component (D), wherein 20 to 100 percent by mass of the aforementioned epoxy resin (A) is an epoxy compound expressed by the following general formula (1), a cured product obtained by curing a composition containing said resin composition and a high-strength fiber-reinforced plastic; wherein (a) and (b) each independently express an integer from 2 to 10, (c) expresses an integer from 0 to 3, R1 and R2 each independently express a bivalent hydrocarbon group having 2 to 5 carbon atoms, and R3 expresses a single bond, a methylene group or —C(CH3)2—.
    Type: Grant
    Filed: August 25, 2016
    Date of Patent: February 11, 2020
    Assignee: ADEKA CORPORATION
    Inventors: Naohiro Fujita, Kazuhide Morino, Tasuku Aoki, Tomoko Kimura, Masato Inadome
  • Publication number: 20190376289
    Abstract: A binding beam includes a steel form having a bottom plate portion and a pair of side plate portions extending upward from both ends of the bottom plate portion and binding beam concrete placed in a groove portion configured by the bottom plate portion and the pair of side plate portions of the steel form.
    Type: Application
    Filed: August 23, 2019
    Publication date: December 12, 2019
    Applicants: TAKENAKA CORPORATION, JFE STEEL CORPORATION, JFE METAL PRODUCTS CORPORATION
    Inventors: Takayuki HIRAYAMA, Kazuto NAKAHIRA, Hirokazu NOZAWA, Yuuichirou OKUNO, Takahiro MACHINAGA, Naohiro FUJITA, Hiroto TAKATSU, Kenji YAMAZAKI, Yukio MURAKAMI, Tomohiro KINOSHITA, Takanori SHIMIZU, Seishi WATANABE, Hiroori YASUOKA
  • Publication number: 20190376283
    Abstract: A steel form is a steel form for forming a binding beam, including: a pair of Z-steels, wherein each of the pair of Z-steels is provided with a bottom plate portion and a side plate portion extending upward from the bottom plate portion, the bottom plate portion has a joining surface for joining the respective bottom plate portions of the pair of Z-steels to each other, and a groove portion allowing concrete placement is formed by the bottom plate portion and the side plate portion of each of the pair of Z-steels
    Type: Application
    Filed: August 23, 2019
    Publication date: December 12, 2019
    Applicants: TAKENAKA CORPORATION, JFE STEEL CORPORATION, JFE METAL PRODUCTS CORPORATION
    Inventors: Takayuki HIRAYAMA, Kazuto NAKAHIRA, Hirokazu NOZAWA, Yuuichirou OKUNO, Takahiro MACHINAGA, Naohiro FUJITA, Hiroto TAKATSU, Kenji YAMAZAKI, Yukio MURAKAMI, Tomohiro KINOSHITA, Takanori SHIMIZU, Seishi WATANABE, Hiroori YASUOKA
  • Publication number: 20180361685
    Abstract: A molding apparatus reduces waviness or deformation of fibers. The molding apparatus includes a fiber feeder (7) that feeds fibers (5) to a lamination area (32) long in a first direction, a resin composition feeder (11) that feeds a resin composition (9) to the lamination area (32), an impregnator (17) that impregnates the fibers (5) fed to the lamination area (32) with the resin composition (9), a curing accelerator (13) that accelerates curing of the resin composition (9) fed to the lamination area (32) while the fibers (5) fed in the lamination area (32) are being tensioned, and a transporter (15) that relatively moves the devices (7, 11, 17, and 13) in the first direction with respect to the lamination area (32). The resin composition (9) contains an epoxy resin (A), a cyanate resin (B), and an aromatic amine curing agent (C) that is liquid at 25° C.
    Type: Application
    Filed: November 21, 2016
    Publication date: December 20, 2018
    Applicants: ADEKA CORPORATION, GH CRAFT LTD.
    Inventors: Naohiro FUJITA, Kazuhide MORINO, Masato INADOME, Masayoshi GOKE, Takeshi SUKEMUNE, Yosuke ARAGANE, Tomo KIMURA, Akinori OKUBO
  • Publication number: 20180251612
    Abstract: A resin composition for fiber reinforced plastic which is a resin composition comprising an epoxy resin (A), a cyanate resin (B) and a liquid aromatic amine curing agent (C), and, as necessary, further an active energy radiation absorbable component (D), wherein 20 to 100 percent by mass of the aforementioned epoxy resin (A) is an epoxy compound expressed by the following general formula (1), a cured product obtained by curing a composition containing said resin composition and a high-strength fiber-reinforced plastic; wherein (a) and (b) each independently express an integer from 2 to 10, (c) expresses an integer from 0 to 3, R1 and R2 each independently express a bivalent hydrocarbon group having 2 to 5 carbon atoms, and R3 expresses a single bond, a methylene group or —C(CH3)2—.
    Type: Application
    Filed: August 25, 2016
    Publication date: September 6, 2018
    Applicant: ADEKA CORPORATION
    Inventors: Naohiro FUJITA, Kazuhide MORINO, Tasuku AOKI, Tomoko KIMURA, Masato INADOME
  • Patent number: 9315677
    Abstract: The present invention is an aqueous polyurethane resin composition for a flame retardant coated material comprised of an aqueous dispersion of a polyurethane resin obtained by extending a chain of an urethane prepolymer in an aqueous dispersion. The aqueous dispersion of the urethane prepolymer is obtained by reacting (a) a polyisocyanate component with (b) a polyol component which contains a phosphorus-containing polyol compound represented by the following general formula (1) as an essential component then dispersed the obtained prepolymer in the water, wherein a unit corresponding to the compound represented by the said general formula (1) is contained so that the phosphorus content in the urethane resin solid is 0.3 to 5.0 mass percent; R1 in the formula (1) represents an alkylene group having 2 to 4 carbon atoms, and m and n represent a number from 1 to 10.
    Type: Grant
    Filed: August 19, 2011
    Date of Patent: April 19, 2016
    Assignee: ADEKA CORPORATION
    Inventors: Naohiro Fujita, Nobuyuki Shimamura
  • Publication number: 20140083239
    Abstract: A steering apparatus includes a grip core and a rim part. The grip core has a cross-sectional area substantially constant in a longitudinal direction of the grip core. The rim part is molded by foaming of a material liquid in a mold, and configured to cover the grip core. A first portion of the rim part is smaller in cross-sectional area than a second portion of the rim part, wherein the mold includes a vent opening facing the first portion of the rim part during the molding of the rim part, wherein the mold includes a material liquid infusion opening facing the second portion of the rim part during the molding of the rim part, and wherein the material liquid is infused into the mold through the material liquid infusion opening, and allowed to flow toward the vent opening.
    Type: Application
    Filed: September 26, 2013
    Publication date: March 27, 2014
    Applicant: NIHON PLAST CO., LTD.
    Inventor: Naohiro FUJITA
  • Publication number: 20130203936
    Abstract: The present invention is an aqueous polyurethane resin composition for a flame retardant coated material comprised of an aqueous dispersion of a polyurethane resin obtained by extending a chain of an urethane prepolymer in an aqueous dispersion. The aqueous dispersion of the urethane prepolymer is obtained by reacting (a) a polyisocyanate component with (b) a polyol component which contains a phosphorus-containing polyol compound represented by the following general formula (1) as an essential component then dispersed the obtained prepolymer in the water, wherein a unit corresponding to the compound represented by the said general formula (1) is contained so that the phosphorus content in the urethane resin solid is 0.3 to 5.0 mass percent; R1 in the formula (1) represents an alkylene group having 2 to 4 carbon atoms, and m and n represent a number from 1 to 10.
    Type: Application
    Filed: August 19, 2011
    Publication date: August 8, 2013
    Applicant: ADEKA CORPORATION
    Inventors: Naohiro Fujita, Nobuyuki Shimamura
  • Patent number: 8071208
    Abstract: The present invention provides an integral skin molded article used for vehicle internal parts, which enables good production efficiency and cost reduction and has good external appearance, and a method of preparing an integral skin molded article, and also provides a laminate with a skin comprising the integral skin molded article and a core material, and a method of preparing a laminate with a skin. Disclosed are an integral skin molded article obtained by injecting a polyurethane foam for a skin into a die after injecting a high density polyurethane resin for a core, containing a high density polyurethane resin for a skin, containing a polyol component, 1-methyl-3,5-diethyl-2,4-diaminobenzene and/or 1-methyl-3,5-diethyl-2,6-diaminobenzene, and a blowing agent into the same die; and a method of preparing a laminate with a skin comprising a skin molded article and a core material.
    Type: Grant
    Filed: September 17, 2008
    Date of Patent: December 6, 2011
    Assignees: Sumika Bayer Urethane Co., Ltd., Nihon Plast Co., Ltd.
    Inventors: Eiju Kochi, Naohiro Fujita, Takahiro Suwama, Shinji Nishikawa, Hiroaki Ido
  • Publication number: 20110008628
    Abstract: The present invention is an aqueous polyurethane resin composition, which has excellent water resistance properties and chemical resistance properties etc. and is suitably available for a coating composition for surface-treated steels, characterized in that an isocyanurate compound (a) represented by the following general formula (1), a long-chain alkylenediol compound (b) having 10-32 carbon atoms, a polyisocyanate compound (c), a polyol compound (d), an anionic group-introducing compound (e), an anionic group neutralizing agent (f) and water are essential components. A, R1 and R2 in the general formula (1) are described in Claim 1.
    Type: Application
    Filed: February 2, 2009
    Publication date: January 13, 2011
    Applicant: ADEKA CORPORATION
    Inventors: Naohiro Fujita, Akira Nakatsuji
  • Publication number: 20090075084
    Abstract: The present invention provides an integral skin molded article used for vehicle internal parts, which enables good production efficiency and cost reduction and has good external appearance, and a method of preparing an integral skin molded article, and also provides a laminate with a skin comprising the integral skin molded article and a core material, and a method of preparing a laminate with a skin. Disclosed are an integral skin molded article obtained by injecting a polyurethane foam for a skin into a die after injecting a high density polyurethane resin for a core, containing a high density polyurethane resin for a skin, containing a polyol component, 1-methyl-3,5-diethyl-2,4-diaminobenzene and/or 1-methyl-3,5-diethyl-2,6-diaminobenzene, and a blowing agent into the same die; and a method of preparing a laminate with a skin comprising a skin molded article and a core material.
    Type: Application
    Filed: September 17, 2008
    Publication date: March 19, 2009
    Inventors: Eiju Kochi, Naohiro Fujita, Takahiro Suwama, Shinji Nishikawa, Hiroaki Ido
  • Publication number: 20080194757
    Abstract: The water-dispersed polyurethane composition of the present invention comprises a polyisocyanate component (a), a polyol component (b), and water as the essential components, wherein, at least, an isocyanate compound represented by general formula (I) below is used as the polyisocyanate component (a). The water-dispersed polyurethane composition of the present invention is excellent in adhesiveness, water resistance, corrosion resistance, heat resistance, weather resistance, water repellency, oil repellency, and the like, and can be suitably used as paint for surface-treated steel plates. wherein R1 represents an alkyl group having 10 to 30 carbon atoms, R2 represents —N?C?O or —NH—C(?O)C—O— R1, and A represents a residue other than two —N?C?O groups derived from a diisocyanate.
    Type: Application
    Filed: September 21, 2005
    Publication date: August 14, 2008
    Applicant: ADEKA CORPORATION
    Inventors: Naohiro Fujita, Fumiaki Murano, Atsushi Ohyagi
  • Patent number: 7226981
    Abstract: An epoxy resin curing agent composition containing a ketimine compound prepared by the reaction between a polyoxypropylenediamine component and a ketone compound, wherein (1) the polyoxypropylenediamine component is a 9/1 to 6/4 (by weight) mixture of polyoxypropylenediamine having a molecular weight of 200 and 500 and polyoxypropylenediamine having a molecular weight of 1000 to 3000, (2) the ketimine compound has a degree of ketimination of 90% or higher, or (3) the reaction is carried out in the presence of a catalyst selected from (i) a combination of a tertiary amine and a sulfonic acid and (ii) a salt between a tertiary amine and a sulfonic acid.
    Type: Grant
    Filed: May 17, 2004
    Date of Patent: June 5, 2007
    Assignee: Asahi Denka Co., Ltd.
    Inventors: Naohiro Fujita, Ryo Ogawa, Shoji Kusano
  • Publication number: 20060198921
    Abstract: Disclosed is a structure for preventing resin leak of an injection molding of a resin covering layer on a covering surface of an insert member using a molding die which includes a first mold and a second mold which forms a cavity in combination with the first mold. The cavity receives the covering surface of the insert member for forming the resin covering layer. The first mold and the second mold include clamping surfaces which face each other and receive a portion of the insert member therebetween. The structure includes i) a first sealing portion provided on the portion of the insert member facing a location of the clamping surface near the cavity. The first sealing portion includes a ridge formed at the portion of the insert member.
    Type: Application
    Filed: February 8, 2006
    Publication date: September 7, 2006
    Inventor: Naohiro Fujita
  • Publication number: 20040236061
    Abstract: An epoxy resin curing agent composition containing a ketimine compound prepared by the reaction between a polyoxypropylenediamine component and a ketone compound, wherein (1) the polyoxypropylenediamine component is a 9/1 to 6/4 (by weight) mixture of polyoxypropylenediamine having a molecular weight of 200 and 500 and polyoxypropylenediamine having a molecular weight of 1000 to 3000, (2) the ketimine compound has a degree of ketimination of 90% or higher, or (3) the reaction is carried out in the presence of a catalyst selected from (i) a combination of a tertiary amine and a sulfonic acid and (ii) a salt between a tertiary amine and a sulfonic acid.
    Type: Application
    Filed: May 17, 2004
    Publication date: November 25, 2004
    Applicant: ASAHI DENKA CO., LTD.
    Inventors: Naohiro Fujita, Ryo Ogawa, Shoji Kusano
  • Patent number: 6541541
    Abstract: An aqueous resin composition comprising a polyepoxy compound represented by formula (I): wherein n represents a number of from 0.1 to 20; Z represents a single bond, an alkylidene group having 1 to 4 carbon atoms or a sulfone group; and X represents a hydrogen atom or a glycidyl group, provided that at least 10% of nX's represent a glycidyl group, and water.
    Type: Grant
    Filed: September 18, 2001
    Date of Patent: April 1, 2003
    Assignee: Asahi Denka Kogyo Kabushiki Kaisha
    Inventors: Kiyoshi Masamune, Naohiro Fujita, Ryo Ogawa, Koji Akimoto