Patents by Inventor Yoshiaki Matsunaga
Yoshiaki Matsunaga 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: 8268746Abstract: Provided is a thermosensitive recording material which can be produced through high-speed coating, which is excellent in head-matching property, and which can provide a printed image having good waterproofness, while maintaining high sensitivity and high storage stability, which material includes a support, an under layer laid over the support, the under layer containing a plastic hollow particle, a thermosensitive color-developing layer laid over the under layer, the thermosensitive color-developing layer containing a leuco dye and a developer, wherein two or more layers including the thermosensitive color-developing layer are formed through simultaneous coating by a curtain coating method.Type: GrantFiled: September 9, 2009Date of Patent: September 18, 2012Assignee: Ricoh Company, Ltd.Inventors: Motoi Orihara, Tomohisa Kakuda, Yoshiaki Matsunaga, Eiji Fukui
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Patent number: 8147905Abstract: To provide a heat-sensitive recording material, including: a substrate; a heat-sensitive color developing layer on the substrate, the heat-sensitive color developing layer containing at least a leuco dye and a developer; and a protective layer on the heat-sensitive color developing layer, the protective layer containing at least a binder resin, wherein the binder resin in the protective layer contains diacetone-modified polyvinyl alcohol resin, the degree of polymerization of the binder resin in the protective layer is 1,000 to 1,800 and the degree of saponification of the binder resin is 90% or greater and less than 98%.Type: GrantFiled: February 4, 2011Date of Patent: April 3, 2012Assignee: Ricoh Company, Ltd.Inventors: Yoshiaki Matsunaga, Shinji Takano, Kazuyuki Uetake
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Patent number: 8097560Abstract: The present invention provides a heat-sensitive recording material with enhanced color developing sensitivity maintaining heat resistance and image storage stability characteristics such as plasticizer resistance and water resistance. The present invention provides a heat-sensitive recording material including at least a substrate and a heat-sensitive color developing layer containing a leuco dye and developers on the front surface of the substrate, wherein as the developers 4-hydroxy-4?-allyloxydiphenyl sulfone is used in combination with a first diphenyl compound represented by formula (1) and/or a second diphenyl compound represented by formula (2).Type: GrantFiled: March 6, 2008Date of Patent: January 17, 2012Assignee: Ricoh Company, Ltd.Inventors: Yoshiaki Matsunaga, Yoshikazu Kaneko
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Patent number: 8008229Abstract: To provide a thermosensitive recording material, which contains: a base; a thermosensitive coloring layer containing a leuco dye and a color developer; at least one protective layer containing a resin, a crosslinking agent, and wax, wherein the thermosensitive coloring layer is disposed on the base, and the protective layer is disposed on the thermosensitive coloring layer, and wherein the resin is reactive carbonyl group-containing polyvinyl alcohol, the crosslinking agent is a hydrazide compound, and the wax is oxidized polyethylene wax.Type: GrantFiled: August 2, 2010Date of Patent: August 30, 2011Assignee: Ricoh Company, Ltd.Inventors: Toshiaki Ikeda, Hiroaki Matsui, Yoshitaka Sano, Yoshiaki Matsunaga, Yuhei Fujimoto
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Patent number: 8003568Abstract: Provided is a thermosensitive recording material that comprises a support, a thermosensitive coloring layer on the support, and a protective layer on the thermosensitive coloring layer, wherein the thermosensitive coloring layer comprises a leuco dye and a color developer, and the protective layer comprises a diacetone-modified polyvinyl alcohol resin and a (meth)acrylic resin.Type: GrantFiled: September 12, 2007Date of Patent: August 23, 2011Assignee: Ricoh Company, Ltd.Inventors: Yoshiaki Matsunaga, Shinji Takano, Takeshi Kajikawa, Toshiaki Ikeda, Masafumi Kumoda
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Patent number: 7968494Abstract: A heat-sensitive recording material including: a substrate; a heat-sensitive color developing layer over the substrate, the heat-sensitive color developing layer composed mainly of a leuco dye and a color developer that develops color of the leuco dye upon heating; and a protective layer over the heat-sensitive color developing layer, the protective layer composed mainly of a water-soluble resin and a crosslinking agent, wherein the protective layer contains diacetone-modified polyvinyl alcohol as the water-soluble resin, and N-aminopolyacrylamide as the crosslinking agent.Type: GrantFiled: September 12, 2007Date of Patent: June 28, 2011Assignee: Ricoh Company, Ltd.Inventors: Shinji Takano, Yoshiaki Matsunaga
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Publication number: 20110135830Abstract: To provide a heat-sensitive recording material, including: a substrate; a heat-sensitive color developing layer on the substrate, the heat-sensitive color developing layer containing at least a leuco dye and a developer; and a protective layer on the heat-sensitive color developing layer, the protective layer containing at least a binder resin, wherein the binder resin in the protective layer contains diacetone-modified polyvinyl alcohol resin, the degree of polymerization of the binder resin in the protective layer is 1,000 to 1,800 and the degree of saponification of the binder resin is 90% or greater and less than 98%.Type: ApplicationFiled: February 4, 2011Publication date: June 9, 2011Applicant: RICOH COMPANY, LTD.Inventors: Yoshiaki Matsunaga, Shinji Takano, Kazuyuki Uetake
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Patent number: 7906458Abstract: To provide a heat-sensitive recording material, including: a substrate; a heat-sensitive color developing layer on the substrate, the heat-sensitive color developing layer containing at least a leuco dye and a developer; and a protective layer on the heat-sensitive color developing layer, the protective layer containing at least a binder resin, wherein the binder resin in the protective layer contains diacetone-modified polyvinyl alcohol resin, the degree of polymerization of the binder resin in the protective layer is 1,000 to 1,800 and the degree of saponification of the binder resin is 90% or greater and less than 98%.Type: GrantFiled: September 13, 2007Date of Patent: March 15, 2011Assignee: Ricoh Company, Ltd.Inventors: Yoshiaki Matsunaga, Shinji Takano, Kazuyuki Uetake
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Publication number: 20110033642Abstract: To provide a thermosensitive recording material, which contains: a base; a thermosensitive coloring layer containing a leuco dye and a color developer; at least one protective layer containing a resin, a crosslinking agent, and wax, wherein the thermosensitive coloring layer is disposed on the base, and the protective layer is disposed on the thermosensitive coloring layer, and wherein the resin is reactive carbonyl group-containing polyvinyl alcohol, the crosslinking agent is a hydrazide compound, and the wax is oxidized polyethylene wax.Type: ApplicationFiled: August 2, 2010Publication date: February 10, 2011Applicant: RICOH COMPANY, LTD.Inventors: Toshiaki Ikeda, Hiroaki Matsui, Yoshitaka Sano, Yoshiaki Matsunaga, Yuhei Fujimoto
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Publication number: 20100062936Abstract: Provided is a thermosensitive recording material which can be produced through high-speed coating, which is excellent in head-matching property, and which can provide a printed image having good waterproofness, while maintaining high sensitivity and high storage stability, which material includes a support, an under layer laid over the support, the under layer containing a plastic hollow particle, a thermosensitive color-developing layer laid over the under layer, the thermosensitive color-developing layer containing a leuco dye and a developer, wherein two or more layers including the thermosensitive color-developing layer are formed through simultaneous coating by a curtain coating method.Type: ApplicationFiled: September 9, 2009Publication date: March 11, 2010Applicant: RICOH COMPANY, LTD.Inventors: Motoi Orihara, Tomohisa Kakuda, Yoshiaki Matsunaga, Eiji Fukui
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Publication number: 20080280757Abstract: Provided is a thermosensitive recording material that comprises a support, a thermosensitive coloring layer on the support, and a protective layer on the thermosensitive coloring layer, wherein the thermosensitive coloring layer comprises a leuco dye and a color developer, and the protective layer comprises a diacetone-modified polyvinyl alcohol resin and a (meth)acrylic resin.Type: ApplicationFiled: September 12, 2007Publication date: November 13, 2008Inventors: Yoshiaki Matsunaga, Shinji Takano, Takeshi Kajikawa, Toshiaki Ikeda, Masafumi Kumoda
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Publication number: 20080220969Abstract: The present invention provides a heat-sensitive recording material with enhanced color developing sensitivity maintaining heat resistance and image storage stability characteristics such as plasticizer resistance and water resistance. The present invention provides a heat-sensitive recording material including at least a substrate and a heat-sensitive color developing layer containing a leuco dye and developers on the front surface of the substrate, wherein as the developers 4-hydroxy-4?-allyloxydiphenyl sulfone is used in combination with a first diphenyl compound represented by formula (1) and/or a second diphenyl compound represented by formula (2).Type: ApplicationFiled: March 6, 2008Publication date: September 11, 2008Applicant: Ricoh Company, Ltd.Inventors: Yoshiaki Matsunaga, Yoshikazu Kaneko
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Publication number: 20080146443Abstract: To provide a heat-sensitive recording material, including: a substrate; a heat-sensitive color developing layer on the substrate, the heat-sensitive color developing layer containing at least a leuco dye and a developer; and a protective layer on the heat-sensitive color developing layer, the protective layer containing at least a binder resin, wherein the binder resin in the protective layer contains diacetone-modified polyvinyl alcohol resin, the degree of polymerization of the binder resin in the protective layer is 1,000 to 1,800 and the degree of saponification of the binder resin is 90% or greater and less than 98%.Type: ApplicationFiled: September 13, 2007Publication date: June 19, 2008Inventors: Yoshiaki Matsunaga, Shinji Takano, Kazuyuki Uetake
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Publication number: 20080096762Abstract: A heat-sensitive recording material including: a substrate; a heat-sensitive color developing layer over the substrate, the heat-sensitive color developing layer composed mainly of a leuco dye and a color developer that develops color of the leuco dye upon heating; and a protective layer over the heat-sensitive color developing layer, the protective layer composed mainly of a water-soluble resin and a crosslinking agent, wherein the protective layer contains diacetone-modified polyvinyl alcohol as the water-soluble resin, and N-aminopolyacrylamide as the crosslinking agent.Type: ApplicationFiled: September 12, 2007Publication date: April 24, 2008Inventors: Shinji Takano, Yoshiaki Matsunaga
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Patent number: 4664507Abstract: An electrographic printer/copier includes a paper path which is easily accessed from the top of the machine and permits copies to be collated automatically. The machine includes a paper tray which adjusts to organize successive pages into related reports.Type: GrantFiled: February 11, 1985Date of Patent: May 12, 1987Assignee: Kentek Information Systems, Inc.Inventors: Kensuke Fukae, Shozo Kaieda, Yoshiaki Matsunaga
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Patent number: 4066540Abstract: An apparatus for continuous froth flotation is disclosed which comprises a vertically elongate column having disposed therein a froth separator, a raw water inlet pipe, a treated water discharge pipe and a gas dispersing unit, and stepped shelves disposed inside said column and adapted to provide thorough contact between the bubbles and the water subjected to treatment.Type: GrantFiled: October 28, 1976Date of Patent: January 3, 1978Assignee: Agency of Industrial Science & TechnologyInventors: Shinji Wada, Yoshiaki Matsunaga, Michihiro Noda