Patents by Inventor Motoi Orihara
Motoi Orihara 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: 8193116Abstract: To provide a heat-sensitive recording material including a substrate; a heat-sensitive color-developing layer over the substrate, the heat-sensitive color-developing layer containing a leuco dye and a developer; a first protective layer over the heat-sensitive color-developing layer, the first protective layer containing a water-soluble resin and a crosslinking agent; and a second protective layer over the first protective layer, the second protective layer containing a water-soluble resin, a crosslinking agent and a pigment, wherein the heat-sensitive color-developing layer, the first protective layer and the second protective layer are formed simultaneously by curtain coating method, and the second protective layer contains diacetone-modified polyvinyl alcohol and acrylic resin or maleic acid copolymer resin.Type: GrantFiled: September 29, 2011Date of Patent: June 5, 2012Assignee: Ricoh Company, Ltd.Inventors: Motoi Orihara, Norihiko Inaba
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Publication number: 20120021900Abstract: To provide a heat-sensitive recording material including a substrate; a heat-sensitive color-developing layer over the substrate, the heat-sensitive color-developing layer containing a leuco dye and a developer; a first protective layer over the heat-sensitive color-developing layer, the first protective layer containing a water-soluble resin and a crosslinking agent; and a second protective layer over the first protective layer, the second protective layer containing a water-soluble resin, a crosslinking agent and a pigment, wherein the heat-sensitive color-developing layer, the first protective layer and the second protective layer are formed simultaneously by curtain coating method, and the second protective layer contains diacetone-modified polyvinyl alcohol and acrylic resin or maleic acid copolymer resin.Type: ApplicationFiled: September 29, 2011Publication date: January 26, 2012Applicant: RICOH COMPANY, LTD.Inventors: Motoi Orihara, Norihiko Inaba
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Patent number: 8058209Abstract: To provide a heat-sensitive recording material including a substrate; a heat-sensitive color-developing layer over the substrate, the heat-sensitive color-developing layer containing a leuco dye and a developer; a first protective layer over the heat-sensitive color-developing layer, the first protective layer containing a water-soluble resin and a crosslinking agent; and a second protective layer over the first protective layer, the second protective layer containing a water-soluble resin, a crosslinking agent and a pigment, wherein the heat-sensitive color-developing layer, the first protective layer and the second protective layer are formed simultaneously by curtain coating method, and the second protective layer contains diacetone-modified polyvinyl alcohol and acrylic resin or maleic acid copolymer resin.Type: GrantFiled: March 18, 2008Date of Patent: November 15, 2011Assignee: Ricoh Company, Ltd.Inventors: Motoi Orihara, Norihiko Inaba
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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: 20080234128Abstract: To provide a heat-sensitive recording material including a substrate; a heat-sensitive color-developing layer over the substrate, the heat-sensitive color-developing layer containing a leuco dye and a developer; a first protective layer over the heat-sensitive color-developing layer, the first protective layer containing a water-soluble resin and a crosslinking agent; and a second protective layer over the first protective layer, the second protective layer containing a water-soluble resin, a crosslinking agent and a pigment, wherein the heat-sensitive color-developing layer, the first protective layer and the second protective layer are formed simultaneously by curtain coating method, and the second protective layer contains diacetone-modified polyvinyl alcohol and acrylic resin or maleic acid copolymer resin.Type: ApplicationFiled: March 18, 2008Publication date: September 25, 2008Applicant: Ricoh Company, Ltd.Inventors: Motoi ORIHARA, Norihiko Inaba
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Patent number: 5703006Abstract: A thermosensitive recording medium is disclosed which includes a support, and a thermosensitive color-developing layer formed on the support and containing a leuco dye having a melting point of at least 200.degree. C. and a color developer having a melting point of at least 180.degree..Type: GrantFiled: January 11, 1996Date of Patent: December 30, 1997Assignee: Ricoh Company, Ltd.Inventors: Yasutomo Mori, Motoi Orihara, Kunihiko Hada, Shuji Miyamoto
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Patent number: 5646088Abstract: A thermosensitive recording material having a high degree of background whiteness, superior light resistance without coloring of the background when exposed to the light, and a method of producing a stable coating liquid or forming a thermosensitive coloring layer and a protective layer are provided.Type: GrantFiled: February 15, 1996Date of Patent: July 8, 1997Assignee: Ricoh Co., Ltd.Inventors: Kunihiko Hada, Yasutomo Mori, Motoi Orihara, Shuji Miyamoto
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Patent number: 5474869Abstract: A toner comprising a binder resin and a coloring agent, with an aggregation degree of 5 to 60%, and an absolute value of Q/M measured by the suction method of 2 to 30 .mu.Type: GrantFiled: September 30, 1994Date of Patent: December 12, 1995Assignee: Ricoh Company, Ltd.Inventors: Masami Tomita, Kohichi Katoh, Tomoe Hagiwara, Koji Suzuki, Shigekazu Enoki, Naoki Iwata, Motoi Orihara, Shinichi Kuramoto
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Patent number: 5370959Abstract: An image formation method of developing a latent electrostatic image formed on a latent-electrostatic-image bearing member to a visible toner image by a one-component type developer consisting essentially of a toner is carried out by the steps of forming numerous micro closed electric fields near the surface of a developer-bearing member by causing the developer-bearing member to selectively hold electric charges on the surface thereof; supplying the developer to the surface of the developer-bearing member to hold the toner on the surface of the developer-bearing member by the micro closed electric fields; and developing a latent electrostatic image to a visible toner image by the toner. The toner is composed of a binder resin, a coloring agent and a quaternary ammonium salt serving as a charge controlling agent.Type: GrantFiled: March 23, 1992Date of Patent: December 6, 1994Assignee: Ricoh Company, Ltd.Inventors: Tomoe Hagiwara, Shinichi Kuramoto, Motoi Orihara
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Patent number: 5164774Abstract: In a developing device and a dry color toner for color electrophotography. The developing device is provided with a toner conveying member and a toner layer thickness controlling member which is in contact with the toner conveying member. The color toner for developing electrostatic images used in this developing device has the following relation between the number average particle diameter and the volume average particle diameter: ##EQU1## Even after a continuous copying, the developing device and the color toner provide substantially the same image quality as that in the earlier stages of the continuous copying.Type: GrantFiled: December 13, 1988Date of Patent: November 17, 1992Assignee: Ricoh Company, Ltd.Inventors: Masami Tomita, Hachiro Tosaka, Motoi Orihara, Hiroshi Tanaka, Tomoe Hagiwara
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Patent number: 4833058Abstract: This invention relates to a developing apparatus for one component type toner, which has a thin film-forming element applying a thin film of one component type toner on the surface of a toner holder, characterized in that said thin film-forming element is composed of a silicone rubber comprising 100 parts by weight of a siloxane polymer having a cross linking density of 4-8.times.10.sup.-4 mol/cc and 30-70 parts by weight of silica.Type: GrantFiled: September 17, 1987Date of Patent: May 23, 1989Assignee: Ricoh Co., Ltd.Inventors: Yasuo Hirano, Kazuo Nojima, Motoi Orihara
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Patent number: 4762763Abstract: This invention relates to a toner for developing an electrostatic latent image, which contains a coloring agent, a binder resin and a charge controlling agent as the main components, said charge controlling agent being a metal salt of salicylic acid or derivatives.Type: GrantFiled: December 8, 1986Date of Patent: August 9, 1988Assignee: Ricoh Co., Ltd.Inventors: Yoshihiro Nomura, Noriaki Ide, Kazumi Ohtaki, Masami Tomita, Hachiro Tosaka, Toshiki Nanya, Motoi Orihara, Shunichi Chiba, Satoru Inoue, Yasuo Asahina, Hiroyuki Fushimi
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Patent number: 4670368Abstract: A developer comprises a mixture of (a) magnetic toner particles comprising a polymeric material and finely-divided magnetic particles, having an electric resistivity of 10.sup.12 .OMEGA.cm or more, and (b) electroconductive magnetic particles having an electric resistivity of 10.sup.9 .OMEGA.cm or less, a smaller volume mean diameter than that of the magnetic toner particles, with the saturation magnetic moment of the electroconductive magnetic particles being in the range of from 25 emu/g to 75 emu/g, which is larger than the saturation magnetic moment of the magnetic toner particles.Type: GrantFiled: January 30, 1986Date of Patent: June 2, 1987Assignee: Ricoh Company, Ltd.Inventors: Hachiro Tosaka, Kimitoshi Yamaguchi, Motoi Orihara