Patents by Inventor Takeshi Omatsu
Takeshi Omatsu 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: 8123845Abstract: The invention provides a dual color ink composition which comprises: (a) at least one pigment selected from a pearlescent pigment and a metal powder pigment; (b) water; (c) at least one water-soluble organic solvent selected from alcohols, glycols and glycol ethers, any of which have a branched hydrophobic group; (d) a water-soluble dye; and (e) a modified starch as a water-soluble fixing agent.Type: GrantFiled: June 11, 2007Date of Patent: February 28, 2012Assignee: Sakura Color Products CorporationInventors: Takeshi Omatsu, Tomochika Yoshitsugi
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Patent number: 8080098Abstract: In a water-based ink composition of the present invention, 2.5 to 50 wt % of white-colored resin particles and 2.5 to 50 wt % of film-forming resin emulsions in a solid content are contained with respect to the total amount of the ink, the ratio of said white-colored resin particles to film-forming resin emulsions is 1:0.2 to 1:3, and not less than 20 wt % of said white-colored resin particles and film-forming resin emulsions in a solid content are contained in total.Type: GrantFiled: August 8, 2005Date of Patent: December 20, 2011Assignee: Sakura Color Products CorporationInventors: Norimasa Kurihara, Shoko Matsumoto, Kyoko Sano, Yasunori Nakatani, Hiroyoshi Yamamoto, Kozaburo Fujita, Hiroshi Inoue, Takeshi Omatsu, Shigeki Yoneda, Tomohiro Sawa
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Patent number: 7914222Abstract: A tip unit (1) incorporated in a liquid applicator such as a ball-point pen, the tip unit being capable of an increased rate of liquid discharge with no leaking or clogging problem. To achieve it, the tip unit (1) is accommodated in a tip body (11) having a ball housing (15), a ball (10), a capillary hole (16), and a proximal bore, the ball housing (15) being a passage for allowing liquid to flow therethrough, the ball (10) being rotatively held in the ball housing (15). The ball housing (15) is provided with at least one ink channel (47) adapted to communicate the ball housing (15) with the capillary hole (16) or the proximal bore. The ball housing (15) has a ball resting seat (45) and a side wall (41) that are connected by a connecting surface (71) having a shape of a truncated conical surface with its apex toward the distal end of the tip unit (1).Type: GrantFiled: May 26, 2004Date of Patent: March 29, 2011Assignee: Sakura Color Products CorporationInventors: Hiroshi Inoue, Norimasa Kurihara, Shoko Matsumoto, Kyoko Sano, Takeshi Omatsu, Shigeki Yoneda, Yasunori Nakatani, Hiroyoshi Yamamoto, Kozaburo Fujita
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Patent number: 7905671Abstract: The ink backflow preventive of the present invention contains at least refractory and/or involatile organic liquid substances and gelling agents, wherein the oil separation degree under the specific condition is prepared to be 1 to 15 %, in which as at least said gelling agents, styrene-based thermoplastic elastomer is contained and said styrene-based thermoplastic elastomer is composed of two or more of said styrene-based thermoplastic elastomer with the same molecular weight and with the different average molecular weight.Type: GrantFiled: June 30, 2005Date of Patent: March 15, 2011Assignee: Sakura Color Products CorporationInventors: Takeshi Omatsu, Hirokazu Matsuda, Hiroshi Inoue
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Patent number: 7776941Abstract: An oil-based ink composition for writing instruments is provided that is capable of improving storage stability of an ink, while maintaining a leveling property even when a soluble gelling agent is used. The oil-based ink composition for writing instruments comprises a colorant, a resin, an organic solvent and a gelling agent, wherein said organic solvent(s) is (are) hydrocarbons solvent(s), and in particular, at least one species of the solvent selected from the group of aliphatic hydrocarbons solvent(s), alicyclic hydrocarbons solvent(s), aromatic hydrocarbons solvent(s), and halogenetad hydrocarbons solvent(s), said gelling agent(s) comprises (comprise) soluble gelling agent(s) soluble to the above organic solvent(s) and insoluble gelling agent(s) insoluble to the above organic solvent(s), and the above insoluble gelling agent(s) is (are) urea-modified thixotropic agent(s).Type: GrantFiled: May 23, 2006Date of Patent: August 17, 2010Assignee: Sakura Color Products CorporationInventors: Shigeki Yoneda, Takeshi Omatsu
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Publication number: 20100162921Abstract: The invention provides a dual color ink composition which comprises: (a) at least one pigment selected from a pearlescent pigment and a metal powder pigment; (b) water; (c) at least one water-soluble organic solvent selected from alcohols, glycols and glycol ethers, any of which have a branched hydrophobic group; (d) a water-soluble dye; and (e) a modified starch as a water-soluble fixing agent.Type: ApplicationFiled: June 11, 2007Publication date: July 1, 2010Inventors: Takeshi Omatsu, Tomochika Yoshitsugi
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Patent number: 7721402Abstract: A method for producing a tip unit for a liquid applicator including: a first process of shaping the contour of a tip body in the form of a truncated conical surface; a second process of forming a ball housing having an open end at its distal end in the tip body; a third process of placing a ball into the ball housing; a fourth process of scraping the peripheral side of the distal end portion of the tip body to form a peripherally scraped portion after the first process; and a fifth process of deforming the peripherally scraped distal end portion of the tip body toward the ball.Type: GrantFiled: May 26, 2004Date of Patent: May 25, 2010Assignee: Sakura Color Products CorporationInventors: Hiroshi Inoue, Norimasa Kurihara, Shoko Matsumoto, Kyoko Sano, Takeshi Omatsu, Shigeki Yoneda, Yasunori Nakatani, Hiroyoshi Yamamoto, Kozaburo Fujita
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Patent number: 7637680Abstract: A coating tool that includes an ink containment tube, an oily ink and a backflow inhibiting material. The ink is in contact with the inhibiting material. The ink containment tube has a boundary which is in contact with the oily ink and the backflow inhibiting material. The boundary contains polyvinyl alcohol and fluorine-based surfactants, the oily ink contains a colorant, a resin, an organic solvent, and a gelling agent, and the backflow inhibiting material consists of base material components and a gelling agent which contains polyacrylic acid, the polyacrylic acid being present in an amount of 0.1 to 3 wt % with respect to the total amount of said backflow inhibiting material.Type: GrantFiled: November 4, 2004Date of Patent: December 29, 2009Assignee: Sakura Color Products CorporationInventors: Shigeki Yoneda, Takeshi Omatsu
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Publication number: 20090234069Abstract: An oil-based ink composition for writing instruments is provided that is capable of improving storage stability of an ink, while maintaining a leveling property even when a soluble gelling agent is used. The oil-based ink composition for writing instruments comprises a colorant, a resin, an organic solvent and a gelling agent, wherein said organic solvent(s) is (are) hydrocarbons solvent(s), and in particular, at least one species of the solvent selected from the group of aliphatic hydrocarbons solvent(s), alicyclic hydrocarbons solvent(s), aromatic hydrocarbons solvent(s), and halogenetad hydrocarbons solvent(s), said gelling agent(s) comprises (comprise) soluble gelling agent(s) soluble to the above organic solvent(s) and insoluble gelling agent(s) insoluble to the above organic solvent(s), and the above insoluble gelling agent(s) is (are) urea-modified thixotropic agent(s).Type: ApplicationFiled: May 23, 2006Publication date: September 17, 2009Applicant: SAKURA COLOR PRODUCTS CORPORATIONInventors: Shigeki P. Yoneda, Takeshi Omatsu
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Patent number: 7541394Abstract: A water base pigment ink composition for inner lead type writing instruments do not comprise white colored inorganic pigments or white colored resin particles as coloring materials and the content of pigment is 0.5 to 7 wt %, the content of water-soluble resin is 2 to 10 wt % with respect to the total amount of the ink, and the viscosity is 3.5 to 10 mPa·s.Type: GrantFiled: December 26, 2003Date of Patent: June 2, 2009Assignee: Sakura Color Products CorporationInventors: Kazuhiro Kawauchi, Takeshi Omatsu
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Patent number: 7538148Abstract: The ink of the present invention comprises at least a three-dimensional film-forming component and water, comprises an adhesive synthetic resin emulsion as said three-dimensional film-forming component, and comprises at least 30% by weight of said adhesive synthetic resin emulsion on the basis of the solid content with respect to the total amount of the ink, and minimum film-forming temperature (MFT) of said adhesive synthetic resin emulsion is not greater than 25° C. and further, said ink comprises 1 to 3% by weight of a film-forming assistant with respect to the total amount of the ink.Type: GrantFiled: May 26, 2004Date of Patent: May 26, 2009Assignee: Sakura Color Products CorporationInventors: Hiroshi Inoue, Norimasa Kurihara, Shoko Matsumoto, Kyoko Sano, Takeshi Omatsu, Shigeki Yoneda, Yasunori Nakatani, Hiroyoshi Yamamoto, Kozaburo Fujita
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Publication number: 20070237569Abstract: The ink backflow preventive of the present invention contains at least refractory and/or involatile organic liquid substances and gelling agents, wherein the oil separation degree under the specific condition is prepared to be 1 to 15 %, in which as at least said gelling agents, styrene-based thermoplastic elastomer is contained and said styrene-based thermoplastic elastomer is composed of two or more of said styrene-based thermoplastic elastomer with the same molecular weight and with the different average molecular weight.Type: ApplicationFiled: June 30, 2005Publication date: October 11, 2007Applicant: SAKURA COLOR PRODUCTS CORPORATIONInventors: Takeshi Omatsu, Hirokazu Matsuda, Hiroshi Inoue
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Publication number: 20070203259Abstract: In a water-based ink composition of the present invention, 2.5 to 50 wt % of white-colored resin particles and 2.5 to 50 wt % of film-forming resin emulsions in a solid content are contained with respect to the total amount of the ink, the ratio of said white-colored resin particles to film-forming resin emulsions is 1:0.2 to 1:3, and not less than 20 wt % of said white-colored resin particles and film-forming resin emulsions in a solid content are contained in total.Type: ApplicationFiled: August 8, 2005Publication date: August 30, 2007Applicant: SAKURA COLOR PRODUCTS CORPORATIONInventors: Norimasa Kurihara, Shoko Matsumoto, Kyoko Sano, Yasunori Nakatani, Hiroyoshi Yamamoto, Kozaburo Fujita, Hiroshi Inoue, Takeshi Omatsu, Shigeki Yoneda, Tomohiro Sawa
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Publication number: 20070110507Abstract: A tip unit (1) incorporated in a liquid applicator such as a ball-point pen, the tip unit being capable of an increased rate of liquid discharge with no leaking or clogging problem. To achieve it, the tip unit (1) is accommodated in a tip body (11) having a ball housing (15), a ball (10), a capillary hole (16), and a proximal bore, the ball housing (15) being a passage for allowing liquid to flow therethrough, the ball (10) being rotatively held in the ball housing (15). The ball housing (15) is provided with at least one ink channel (47) adapted to communicate the ball housing (15) with the capillary hole (16) or the proximal bore. The ball housing (15) has a ball resting seat (45) and a side wall (41) that are connected by a connecting surface (71) having a shape of a truncated conical surface with its apex toward the distal end of the tip unit (1).Type: ApplicationFiled: May 26, 2004Publication date: May 17, 2007Inventors: Hiroshi Inoue, Norimasa Kurihara, Shoko Matsumoto, Kyoko Sano, Takeshi Omatsu, Shigeki Yoneda, Yasunori Nakatani, Hiroyoshi Yamamoto, Kozaburo Fujita
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Publication number: 20070070165Abstract: The invention provides a coating tool in which an oily ink and a backflow inhibiting material contacting with said ink are contained, wherein the above mentioned ink containment tube has a boundary which contacts with said oily ink and said backflow inhibiting material, the above mentioned oily ink contains polyvinyl alcohol and fluorine-based surfactants said boundary contains polyvinyl alcohol and fluorine-based surfactants, said oily ink contains a colorant, a resin, an organic solvent, and a gelling agent, and at least an organic solvent among aliphatic hydrocarbon-based solvent or an alicyclic hydrocarbon-based solvent is contained as said organic solvent, and a metal soap is contained as said gelling agent, and said backflow inhibiting material consists of base material components and a gelling agent which contains polyacrylic acid, and the above mentioned plyacrylic acid is contained in 0.1 to 3 wt % with respect to the total amount of said backflow inhibiting material.Type: ApplicationFiled: November 4, 2004Publication date: March 29, 2007Inventors: Shigeki Yoneda, Takeshi Omatsu
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Publication number: 20060260112Abstract: A method for producing a tip unit (1) for a liquid applicator in a stable and easy process, the tip unit (1) being capable of increasing the rate of liquid discharge is provided. The method includes at least five processes; that is, a first process of shaping the contour of a tip body (11) in the form of a truncated conical surface; a second process of forming a ball housing (15) having an open end at its distal end in the tip body (11); a third process of placing a ball (10) into the ball housing (15); a fourth process of scraping the peripheral side of the distal end portion of the tip body (11) to form a peripherally scraped portion (55) after the first process; and a fifth process of deforming the peripherally scraped distal end portion of the tip body (11) toward the ball (10).Type: ApplicationFiled: May 26, 2004Publication date: November 23, 2006Inventors: Hiroshi Inoue, Norimasa Kurihara, Shoko Matsumoto, Kyoko Sano, Takeshi Omatsu, Shigeki Yoneda, Yasunori Nakatani, Hiroyoshi Yamamoto, Kozaburo Fujita
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Publication number: 20060233595Abstract: The ink of the present invention comprises at least a three-dimensional film-forming component and water, comprises an adhesive synthetic resin emulsion as said three-dimensional film-forming component, and comprises at least 30% by weight of said adhesive synthetic resin emulsion on the basis of the solid content with respect to the total amount of the ink, and minimum film-forming temperature (MFT) of said adhesive synthetic resin emulsion is not greater than 25° C. and further, said ink comprises 1 to 3% by weight of a film-forming assistant with respect to the total amount of the ink.Type: ApplicationFiled: May 26, 2004Publication date: October 19, 2006Applicant: SAKURA COLOR PRODUCTS CORPORATIONInventors: Hiroshi Inoue, Norimasa Kurihara, Shoko Matsumoto, Kyoko Sano, Takeshi Omatsu, Shigeki Yoneda, Yasunori Nakatani, Hiroyoshi Yamamoto, Kozaburo Fujita
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Publication number: 20060142418Abstract: A water base pigment ink composition for inner lead type writing instruments do not comprise white colored inorganic pigments or white colored resin particles as coloring materials and the content of pigment is 0.5 to 7 wt %, the content of water-soluble resin is 2 to 10 wt % with respect to the total amount of the ink, and the viscosity is 3.5 to 10 mPa·s.Type: ApplicationFiled: December 26, 2003Publication date: June 29, 2006Applicant: SAKURA COLOR PRODUCTS CORPORATIONInventors: Kazuhiro Kawauchi, Takeshi Omatsu
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Publication number: 20050234150Abstract: The invention provides a water based pigment ink composition comprising water, a pigment, a water-soluble resin, a phosphoric acid ester as a surfactant and an O/W type emulsion of at least one water-insoluble resin selected from the group consisting of acrylic resin, styrene resin and styrene/acrylic resin, wherein resin particles in the emulsion have an average particle diameter in the range of 50 to 200 nm, and the emulsion has a minimum film forming temperature of 50° C. or more. The water based pigment ink composition has excellent coloration in a common white paper and is excellent in the dispersion stability of a pigment and in storage stability, thus giving a handwriting at high density by use in a writing implement or an inkjet image at high density by use in an inkjet printer.Type: ApplicationFiled: December 2, 2004Publication date: October 20, 2005Inventors: Takeshi Omatsu, Kazuhiro Kawauchi
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Publication number: 20040229372Abstract: An ozone indicator comprising at least (1) a color-change layer comprised of an ozone sensitive ink and (2) an overcoat layer formed on part or the whole of the surface of said color-change layer, wherein the ozone sensitive ink comprises a color component which does not change color in an ozone atmosphere.Type: ApplicationFiled: June 15, 2004Publication date: November 18, 2004Inventors: Takeshi Omatsu, Satoshi Maruyama