Patents by Inventor Nobuhiro Kubota
Nobuhiro Kubota 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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Publication number: 20230136359Abstract: Provided is a thermoplastic resin composite material or a thermoplastic resin composite material particle that includes cellulose fibers, can be used to obtain a molded article excellent in mechanical properties such as strength, and is so excellent in fluidity during melting as to be excellent in molding processability. A thermoplastic resin composite material including cellulose fibers, a compatibilizer, and a thermoplastic resin, wherein the cellulose fibers substantially include only fibers having a fiber diameter of 1 to 50 ?m and a fiber length of 10 to 400 ?m, a composition ratio by mass of the cellulose fibers to the thermoplastic resin is 10:90 to 80:20, and arbitrary 10 sections of the thermoplastic resin composite material have a standard deviation of a proportion of an area occupied by the cellulose fibers per predetermined area, the standard deviation being 15% or less.Type: ApplicationFiled: June 15, 2021Publication date: May 4, 2023Inventors: Nobuhiro KUBOTA, Kiyoshi IWAMOTO, Masayoshi SANO, Hiroaki KAWAGUCHI, Yudai KIMURA, Hideo AKAZAWA
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Publication number: 20080124536Abstract: The present invention provides an image-receiving sheet for electrophotography wherein the water-resistant image-receiving sheet for electrophotography, comprises a base paper, one or two plastic films adhered to the one or both surfaces of the base paper, and a toner-receiving layer formed on at least a surface of the plastic film, wherein a main component of the toner-receiving layer is a resin with a transition temperature of 0l to 80° C., and the surface resistance is 1×107 to 1×1011 ?/?.Type: ApplicationFiled: November 28, 2005Publication date: May 29, 2008Applicant: TOMOEGAWA CO., LTD.Inventors: Kiyoshi Iwamoto, Nobuhiro Kubota, Senichi Yoshizawa
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Patent number: 6815021Abstract: The present invention provides a recording medium for ink jet printers in which superior image recording quality and color stability are exhibited. In a recording medium for ink jet printers in which an ink receiving layer contained at least pigment and binder resin is provided on a supporting material, partially saponified PVA having a degree of saponification of 85.0 to 73.0 mol % and a degree of polymerization of 300 to 1500, is contained in the ink receiving layer as a color stability improving component.Type: GrantFiled: March 30, 2000Date of Patent: November 9, 2004Assignees: Seiko Epson Corporation, Tomoegawa Paper Co., Ltd.Inventors: Takayuki Ishikawa, Nobuhiro Kubota, Minoru Tsuchida, Shigeki Asai, Takeshi Yoshimoto, Kiyoshi Iwamoto, Jun Sugiyama, Hiroyuki Onishi, Yukari Ishikawa
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Patent number: 6777040Abstract: A recording sheet for an ink jet printer can improve both recording properties such as vividness of images, printing density, etc., and shelf life such as light resistance of images, ozone resistance, etc. The recording sheet for an ink jet printer comprises a base material and an ink receiving layer provided on at least one surface of the base material, in which the recording sheet contains oligosaccharide and divalent metallic salt.Type: GrantFiled: August 29, 2002Date of Patent: August 17, 2004Assignee: Tomoegawa Paper Co., LTDInventors: Fumikazu Tatsuhashi, Nobuhiro Kubota, Shigeki Asai, Senichi Yoshizawa, Kazushige Katagiri, Minoru Tsuchida
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Patent number: 6656544Abstract: A recording medium for ink jet printers having superior effects in preventing recorded image deterioration such as lowering of image clarity, decrease in density, change in color tone, etc., under high temperature and high humidity, is provided. An ink receiving layer is formed on a base material by coating acrylic copolymer containing at least (meth)acrylate having a solubility parameter (&dgr;) of 15.0 to 23.0 MPa½ as a copolymerizing component, and thereby a recording medium for ink jet printers is produced.Type: GrantFiled: June 26, 2001Date of Patent: December 2, 2003Assignee: Tomoegawa Paper Co., LTDInventors: Takayuki Ishikawa, Nobuhiro Kubota, Shigeki Asai, Minoru Tsuchida, Kiyoshi Iwamoto, Jun Sugiyama, Hiroyuki Onishi, Yukari Ishikawa
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Patent number: 6652092Abstract: A superior recording sheet for an ink jet printer which sufficiently satisfies various property requirements such as light resistance of images, ozone resistance, etc., is provided. The recording sheet for an ink jet printer comprises at least an ink receiving layer and a glossiness adjusting layer on a base material, the ink receiving layer includes an organic acid metallic salt and a cationic dye fixing agent, and the glossiness adjusting layer comprises a fine particle pigment and binder resin.Type: GrantFiled: June 20, 2002Date of Patent: November 25, 2003Assignees: Seiko Epson Corporation, Tomoegawa Paper Co., LtdInventors: Jun Sugiyama, Fumikazu Tatsuhashi, Nobuhiro Kubota, Minoru Tsuchida
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Patent number: 6565952Abstract: The invention provides an ink-jet recording sheet having an excellent preventive effect on overall. degradation by light such as degradation of image clarity, and decrease in density or change of tone of images, and a resin composition for ink-jet recording media used in the formation thereof. The recording sheet of the invention comprises a substrate and as an ink-receiving layer provided on the substrate, a layer containing an acrylic resin comprising, as copolymerizable monomers, (a) a dialkylaminoalkyl methacrylate, (b) acrylamide and (c) at least one monomer selected from among an. alkoxypolyethylene glycol methacrylate, a 2-hydroxyalkyl methacrylate and a 2-hydroxyalkyl acrylate.Type: GrantFiled: January 3, 2001Date of Patent: May 20, 2003Assignees: Tomoegawa Paper Co., Ltd., Seiko Epson CorporationInventors: Takayuki Ishikawa, Shinichiro Kobayashi, Takeshi Yoshimoto, Nobuhiro Kubota, Kiyoshi Iwamoto, Jun Sugiyama, Hiroyuki Onishi, Yukari Sano
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Patent number: 6548150Abstract: A recording medium for ink jet printers having superior recording properties for ink jet printers and having superior surface strength in which recorded images are not easily peeled. Acrylic type copolymer in which at least three components of an A component: (metha)acrylate; a B component: hydroxyalkyl (metha)acrylate; and a C component: antioxidation monomer and/or ultraviolet ray absorptivity monomer are copolymerizing components is contained in a coating solution, an ink receiving layer is provided by coating this solution on a base material, whereby a recording medium for ink jet printers is formed.Type: GrantFiled: September 25, 2000Date of Patent: April 15, 2003Assignees: Seiko Epson Corporation, Tomoegawa Paper Co., Ltd.Inventors: Takayuki Ishikawa, Takeshi Yoshimoto, Nobuhiro Kubota, Shinichiro Kobayashi, Kiyoshi Iwamoto, Jun Sugiyama, Hiroyuki Onishi, Yukari Ishikawa
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Publication number: 20030049481Abstract: A recording sheet for an ink jet printer can improve both recording properties such as vividness of images, printing density, etc., and shelf life such as light resistance of images, ozone resistance, etc. The recording sheet for an ink jet printer comprises a base material and an ink receiving layer provided on at least one surface of the base material, in which the recording sheet contains oligosaccharide and divalent metallic salt.Type: ApplicationFiled: August 29, 2002Publication date: March 13, 2003Applicant: TOMOEGAWA PAPER CO., LTD.Inventors: Fumikazu Tatsuhashi, Nobuhiro Kubota, Shigeki Asai, Senichi Yoshizawa, Kazushige Katagiri, Minoru Tsuchida
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Publication number: 20030008115Abstract: A superior recording sheet for an ink jet printer which sufficiently satisfies various property requirements such as light resistance of images, ozone resistance, etc., is provided. The recording sheet for an ink jet printer comprises at least an ink receiving layer and a glossiness adjusting layer on a base material, the ink receiving layer includes an organic acid metallic salt and a cationic dye fixing agent, and the glossiness adjusting layer comprises a fine particle pigment and binder resin.Type: ApplicationFiled: June 20, 2002Publication date: January 9, 2003Inventors: Jun Sugiyama, Fumikazu Tatsuhashi, Nobuhiro Kubota, Minoru Tsuchida
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Patent number: 6350507Abstract: The present invention provides a superior recording sheet for ink jet printers which can completely satisfy property requirements such as light resistance of the printing images. The recording sheet for an ink jet printer includes a water-soluble divalent or greater metallic salt, so that properties such as light resistance are improved very effectively.Type: GrantFiled: March 16, 1999Date of Patent: February 26, 2002Assignees: Tomoegawa Paper Co., Ltd., Seiko Epson CorporationInventors: Kiyoshi Iwamoto, Shinitiro Kobayashi, Takeshi Yoshimoto, Takayuki Ishikawa, Nobuhiro Kubota, Jun Sugiyama, Hiroyuki Onishi, Yukari Sano