Patents by Inventor Kunihiro Tamahashi
Kunihiro Tamahashi 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: 10293309Abstract: A new method for generating micro-nano bubbles that uses water hammering, a bubble generating nozzle, and an apparatus for generating micro-nano bubbles are provided to construct a system. The system is for generating micro-nano bubbles in a large amount using only pure water, which does not include any nucleating agents, and for performing not only a clean washing and sterilization but also the generation of uncontaminated micro-nano bubbles. The method defined in the present invention uses water hammering power produced by a mutual collision of jets of dissolved-gas-including solution squirted from two or more spouts.Type: GrantFiled: June 13, 2013Date of Patent: May 21, 2019Assignee: SIGMA-TECHNOLOGY INC.Inventors: Yoshiaki Tachibana, Kousuke Tachibana, Kaoru Harada, Souzou Sasajima, Kunihiro Tamahashi, Kyoko Honma, Yuuki Matsumoto
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Publication number: 20150273408Abstract: A new method for generating micro-nano bubbles that uses water hammering, a bubble generating nozzle, and an apparatus for generating micro-nano bubbles are provided to construct a system. The system is for generating micro-nano bubbles in a large amount using only pure water, which does not include any nucleating agents, and for performing not only a clean washing and sterilization but also generation of uncontaminated micro-nano bubbles. The method defined in the present invention uses water hammering power produced by a mutual collision of jets of dissolved-gas-including solution squirted from two or more spouts.Type: ApplicationFiled: June 13, 2013Publication date: October 1, 2015Inventors: Yoshiaki Tachibana, Kousuke Tachibana, Kaoru Harada, Souzou Sasajima, Kunihiro Tamahashi, Kyoko Honma, Yuuki Matsumoto
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Patent number: 7325902Abstract: An ink-jet printer head is characterized by comprising an organic film coated on the surface of the nozzle plate for discharging ink, in which solid particles having abrasion resistance are dispersed, and a water-repellent film on the surface of the organic film, in which the chains of fluorocarbon polymer is grown. The head shows improved durability of the chains of the fluorocarbon polymer on the nozzle plate during cleaning of the nozzle surface.Type: GrantFiled: October 20, 2004Date of Patent: February 5, 2008Assignee: Ricoh Printing Systems, Ltd.Inventors: Kunihiro Tamahashi, Akemi Ouchi, Tsutomu Maekawa, Hidetoshi Fujii, Hiroshi Sasaki
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Patent number: 7290873Abstract: Ink jet recording is performed using an ink that is adjusted such that the thickness dependence rate determined by dividing the difference in optical density between images having an ink layer thickness of 30 ?m and 15 ?m by the ink layer thickness difference of 15 ?m is less than 0.043 per unit layer thickness of 1 ?m or ?Eab* between the same hues is 8 or less.Type: GrantFiled: March 17, 2005Date of Patent: November 6, 2007Assignee: Ricoh Printing Systems, Ltd.Inventors: Akemi Ouchi, Tsutomu Maekawa, Hidetoshi Fujii, Kunihiro Tamahashi, Yutaka Shoji
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Patent number: 7104773Abstract: A three-dimensional laminating molding device includes ejection heads that eject support material for a support, and an ejection head that ejects mold material for a mold. The support material is sold at room temperature. An inner temperature of the laminating molding device during the laminating molding is controlled to a range of (a melting point of the support material?30)° C. to (the melting point of the support material?5)° C.Type: GrantFiled: February 26, 2004Date of Patent: September 12, 2006Assignee: Ricoh Printing Systems, Ltd.Inventors: Tsutomu Maekawa, Akemi Ouchi, Hidetoshi Fujii, Kunihiro Tamahashi, Yutaka Shoji, Hiroshi Takahagi
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Publication number: 20050208233Abstract: Ink jet recording is performed using an ink that is adjusted such that the thickness dependence rate determined by dividing the difference in optical density between images having an ink layer thickness of 30 ?m and 15 ?m by the ink layer thickness difference of 15 ?m is less than 0.043 per unit layer thickness of 1 ?m or ?Eab* between the same hues is 8 or less.Type: ApplicationFiled: March 17, 2005Publication date: September 22, 2005Applicant: Ricoh Printing Systems, Ltd.Inventors: Akemi Ouchi, Tsutomu Maekawa, Hidetoshi Fujii, Kunihiro Tamahashi, Yutaka Shoji
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Patent number: 6918180Abstract: To adhere an actuator unit onto one surface of a diaphragm, a dipping plate is used to evenly cling an adhesive agent to tip ends of a plurality of actuators formed in the actuator unit. The dipping plate is formed with a plurality of grooves corresponding to the respective ones of the plurality of actuators. An adhesive agent is poured into the grooves to the same level and the actuators are dipped into the adhesive pond while maintaining a state in which an imaginary first line that connects the tip ends of said plurality of actuators is in parallel with an imaginary second line that connects borders between immersed and non-immersed portions of the plurality of actuators. The actuators are drawn from the adhesive ponds and adhered to one surface of the diaphragm. An ink channel unit is connected to the opposite surface of the diagram.Type: GrantFiled: December 17, 2001Date of Patent: July 19, 2005Assignee: Ricoh Printing Systems, Ltd.Inventors: Tomohiko Koda, Kunihiro Tamahashi, Jun Nagata
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Publication number: 20050088485Abstract: An ink-jet printer head is characterized by comprising an organic film coated on the surface of the nozzle plate for discharging ink, in which solid particles having abrasion resistance are dispersed, and a water-repellent film on the surface of the organic film, in which the chains of fluorocarbon polymer is grown. The head shows improved durability of the chains of the fluorocarbon polymer on the nozzle plate during cleaning of the nozzle surface.Type: ApplicationFiled: October 20, 2004Publication date: April 28, 2005Inventors: Kunihiro Tamahashi, Akemi Ouchi, Tsutomu Maekawa, Hidetoshi Fujii, Hiroshi Sasaki
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Publication number: 20050053798Abstract: A three-dimensional laminated mold is formed by ejecting a mold material into a groove formed in a support. The support is formed from a support material ejected from an inkjet head. The support material has a ratio of density difference of equal to or less than 13.5%. The ratio of density difference is calculated from an equation: ratio of density difference=((D1-D2)/D1)×100 wherein D1 indicates the density of the support material at 20° C., and D2 indicates the density of the support material at a temperature at which a viscosity of the support material measured using a rotational viscometer falls within the range of 10±1 mPa·s.Type: ApplicationFiled: September 2, 2004Publication date: March 10, 2005Inventors: Tsutomu Maekawa, Akemi Ouchi, Hidetoshi Fujii, Kunihiro Tamahashi
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Patent number: 6814432Abstract: An inkjet recording device includes an ink reservoir that stores ink, a recording head having a plurality of nozzle holes for forming recording dots on a recording medium by ejecting ink particles from the plurality of nozzle holes onto the recording medium positioned opposite the plurality of nozzle holes, an ink channel for supplying ink from the ink reservoir to the recording head, ink discharging means for discharging ink from the recording head and the ink channel, evacuating means for creating a vacuum state in the recording head and the ink channel, and ink filling means for filling the evacuated recording head and ink channel with deaerated ink. The ink discharging means divides the recording head and the ink channel into a plurality of sections and independently discharges ink from each section of the recording head and the ink channel.Type: GrantFiled: June 6, 2003Date of Patent: November 9, 2004Assignee: Hitachi Printing Solutions, Ltd.Inventors: Takahiro Yamada, Kunihiro Tamahashi, Akemi Ouchi, Kunio Satou, Kazuo Shimizu, Hitoshi Kida, Hidetoshi Fujii
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Publication number: 20040175451Abstract: A three-dimensional laminating molding device includes ejection heads that eject support material for a support, and an ejection head that ejects mold material for a mold. The support material is sold at room temperature. An inner temperature of the laminating molding device during the laminating molding is controlled to a range of (a melting point of the support material—30)° C. to (the melting point of the support material—5)° C.Type: ApplicationFiled: February 26, 2004Publication date: September 9, 2004Inventors: Tsutomu Maekawa, Akemi Ouchi, Hidetoshi Fujii, Kunihiro Tamahashi, Yutaka Shoji, Hiroshi Takahagi
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Patent number: 6786577Abstract: An inkjet print head with an ink channel unit (and a method therefore) includes a plurality of plates adhered together to form an inkjet head. An adhesive sheet for adhering together the plurality of plates, includes an adhesive element dispersed in a polymer matrix having an average molecular weight of 50,000 or more. The polymer matrix includes a resin.Type: GrantFiled: October 15, 2002Date of Patent: September 7, 2004Assignee: Hitachi Printing Solutions, Ltd.Inventors: Kunihiro Tamahashi, Yoshiaki Tachibana, Jun Nagata
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Publication number: 20030227524Abstract: An inkjet recording device includes an ink reservoir that stores ink, a recording head having a plurality of nozzle holes for forming recording dots on a recording medium by ejecting ink particles from the plurality of nozzle holes onto the recording medium positioned opposite the plurality of nozzle holes, an ink channel for supplying ink from the ink reservoir to the recording head, ink discharging means for discharging ink from the recording head and the ink channel, evacuating means for creating a vacuum state in the recording head and the ink channel, and ink filling means for filling the evacuated recording head and ink channel with deaerated ink. The ink discharging means divides the recording head and the ink channel into a plurality of sections and independently discharges ink from each section of the recording head and the ink channel.Type: ApplicationFiled: June 6, 2003Publication date: December 11, 2003Inventors: Takahiro Yamada, Kunihiro Tamahashi, Akemi Ouchi, Kunio Satou, Kazuo Shimizu, Hitoshi Kida, Hidetoshi Fujii
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Publication number: 20030076386Abstract: An inkjet print head with an ink channel unit (and a method therefore) includes a plurality of plates adhered together to form an inkjet head. An adhesive sheet for adhering together the plurality of plates, includes an adhesive element dispersed in a polymer matrix having an average molecular weight of 50,000 or more. The polymer matrix includes a resin.Type: ApplicationFiled: October 15, 2002Publication date: April 24, 2003Applicant: Hitachi Koki Co., Ltd.Inventors: Kunihiro Tamahashi, Yoshiaki Tachibana, Jun Nagata
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Publication number: 20020171725Abstract: An ink jet printer which performs recording by allowing an ink droplet to be attached to plain paper, characterized in that there is used an ink composition comprising at least water, a pigment and a water-soluble organic solvent which exhibits a weight loss of from 10% to 40% based on the total weight of ink, a 25° C. surface tension increase of not smaller than 1 mN/m from the initial value and a viscosity change of not greater than 150% of the initial value after 24 hours of aging at a temperature of 25° C.Type: ApplicationFiled: February 8, 2002Publication date: November 21, 2002Inventors: Akemi Ouchi, Tsutomu Maekawa, Kunihiro Tamahashi, Atsushi Kakuta
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Publication number: 20020073543Abstract: To adhere an actuator unit onto one surface of a diaphragm, a dipping plate is used to evenly cling an adhesive agent to tip ends of a plurality of actuators formed in the actuator unit. The dipping plate is formed with a plurality of grooves corresponding to the respective ones of the plurality of actuators. An adhesive agent is poured into the grooves to the same level and the actuators are dipped into the adhesive pond while maintaining a state in which an imaginary first line that connects the tip ends of said plurality of actuators is in parallel with an imaginary second line that connects borders between immersed and non-immersed portions of the plurality of actuators. The actuators are drawn from the adhesive ponds and adhered to one surface of the diaphragm. An ink channel unit is connected to the opposite surface of the diagram.Type: ApplicationFiled: December 17, 2001Publication date: June 20, 2002Inventors: Tomohiko Koda, Kunihiro Tamahashi, Jun Nagata
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Patent number: 6074510Abstract: The same material as the molded members is dissolved in solvent. The solvent is evaporated to form an adhesive layer. The molded members are adhered together via the adhesive layer. The molded members and the adhesive layer are heated and fused together to produce an ink jet head having a monocoque structure formed from a single material including the adhesive layer.Type: GrantFiled: August 21, 1998Date of Patent: June 13, 2000Assignee: Hitachi Koki Co., Ltd.Inventors: Yoshiaki Tachibana, Masanobu Deguchi, Kunihiro Tamahashi, Jun Nagata
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Patent number: 5252418Abstract: An electrophotographic photoreceptor comprising a photoconductive layer comprising a photoconductor, a support for the photoconductive layer and a surface layer formed on the photoconductive layer and comprising a curable resin film and an inorganic insulator pieces having a size larger than the film thickness of the curable resin film. In order to prevent the image blurring of an a-Si:H photoreceptor, on the outermost surface of the photoreceptor was formed a surface layer having a structure in which inorganic insulator pieces have protruded from the curable resin film. Since the curable resin is of high resistance and shows no quality change by corona irradiation, and besides the protruding inorganic insulator pieces prevent the abrasion of the resin, the surface layer having a long life and excellent humidity resistance, durability for corona irradiation and abrasion resistance can be realized.Type: GrantFiled: August 14, 1990Date of Patent: October 12, 1993Assignee: Hitachi, Ltd.Inventors: Fuminori Ishikawa, Akira Sato, Kunihiro Tamahashi, Masatoshi Wakagi, Katsumi Tamura, Masanobu Hanazono, Mitsuyoshi Shoji, Takayuki Nakakawaji, Yutaka Ito, Shigeki Komatsuzaki, Motoo Akagi, Masaaki Imamura
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Patent number: 5204202Abstract: An electrophotographic photosensitive element, e.g. for a photocopier or laser printer, comprises a substrate and a plurality of layers on the substrate including a photoconductive layer of a-Si:H and a protective and lubricating layer which is outermost from said substrate. To provide wear resistance and long life-time of the protective and lubricating layer, this layer comprises a microporous solid material having a pore structure which extends substantially over the whole thickness of the material and a hydrophobic lubricant carried by said solid material. The lubricant includes a liquid film and often times a non-particulate solid film, and provides at least part of the outer surface of the element and is present also in the pores of said microporous solid material.Type: GrantFiled: March 16, 1990Date of Patent: April 20, 1993Assignees: Hitachi, Ltd., Hitachi Chemical Co., Ltd.Inventors: Fuminori Ishikawa, Kunihiro Tamahashi, Shigeharu Onuma, Masatoshi Wakagi, Masanobu Hanazono, Mitsuyoshi Shoji, Takayuki Nakakawaji, Yutaka Ito, Shigeki Komatsuzaki, Chiaki Yamabishi
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Patent number: 5110792Abstract: An optical modulation method and apparatus uses superconductive oxide material for the optical modulation element. The current, magnetic field, temperature or pressure applied to the superconductive oxide material is varied so as to induce a superconduction-normalconduction transition, and the resulting variation in optical characteristics such as the reflectivity, transmissivity or refractive index of the superconductive oxide material modulate the input light. The method and apparatus are fast in operation and simple in structure. The method and apparatus also detect the variation in the current, magnetic field, temperature or pressure as a change in the reflectivity, transmissivity or refractive index of the superconductive oxide material on the basis of a superconduction-normalconduction transition.Type: GrantFiled: November 3, 1989Date of Patent: May 5, 1992Assignee: Hitachi, Ltd.Inventors: Takahiro Nakayama, Kunihiro Tamahashi, Moriaki Fuyama, Hiroyuki Minemura, Yoshio Sato, Nobuyoshi Tsuboi, Hiroaki Koyanagi