Patents by Inventor Motoko Hiraki
Motoko Hiraki 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: 20080044601Abstract: Ink jet printing paper capable of providing, by using a low permeability or a nonpermeable supporting sheet, a high surface glossiness and a high dot reproducibility of a silver halide photograph level, an excellent absorptivity of ink, and a high recording density, and preventing cockling by ink solvent, comprising the low permeability or the nonpermeable supporting sheet, at least one ink receiving layer coated on the supporting sheet, and a luster layer coated on the ink receiving layer, the ink receiving layer in contact with the luster layer comprising pigment, as a main component, having a specific surface area-based mode diameter of pore distribution of 100 nm or less and an average secondary particle size of 1.3 ?m or less, and the luster layer comprising pigment, as a main component, having an average primary particle size of 5 to 100 nm.Type: ApplicationFiled: October 23, 2007Publication date: February 21, 2008Applicant: Oji Paper Co., Ltd.Inventors: Shinichi Asano, Motoko Hiraki, Tomomi Takahashi, Hiromasa Kondo, Takeshi Iida, Ryu Kitamura
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Publication number: 20080038491Abstract: The present invention relates to a method for producing an ink jet recording sheet characterized by including: applying a coating liquid containing at least both a temperature-sensitive polymeric compound and a pigment the temperature-sensitive polymeric compound having a temperature region where hydrophobicity is exhibited and a temperature region where hydrophilicity is exhibited, the coating liquid becoming more viscous or gelating in the temperature region where hydrophilicity is exhibited, onto either an air-permeable support or at least one undercoating layer provided on an air-permeable support in the temperature region where hydrophobicity is exhibited, to form a coating layer of the coating liquid, bringing the temperature thereof to the temperature region where the temperature-sensitive polymeric compound exhibits hydrophilicity to increase the viscosity of the coating layer or gelate the coating layer, then applying a wetting liquid containing an ink fixing agent (and colloidal particles) onto theType: ApplicationFiled: September 8, 2005Publication date: February 14, 2008Applicant: OJI PAPER CO., LTD.Inventors: Kazuo Ikeda, Motoko Hiraki, Shinichi Asano, Tomoyuki Hisaoka, Nobuhisa Dano, Hiroyuki Nemoto
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Patent number: 7303651Abstract: Ink jet printing paper capable of providing, by using a low permeablity or a nonpermeable supporting sheet, a high surface glossiness and a high dot reproducibility of a silver halide photograph level, an excellent absorptivity of ink, and a high recording density, and preventing cockling by ink solvent, comprising the low permeablity or the nonpermeable supporting sheet, at least one ink receiving layer coated on the supporting sheet, and a luster layer coated on the ink receiving layer, the ink receiving layer in contact with the luster layer comprising pigment, as a main component, having a specific surface area-based mode diameter of pore distribution of 100 nm or less and an average secondary particle size of 1.3 ?m or less, and the luster layer comprising pigment, as a main component, having an average primary particle size of 5 to 100 nm.Type: GrantFiled: November 8, 2002Date of Patent: December 4, 2007Assignee: Oji Paper Co., Ltd.Inventors: Shinichi Asano, Motoko Hiraki, Tomomi Takahashi, Hiromasa Kondo, Takeshi Iida, Ryu Kitamura
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Publication number: 20070202263Abstract: A process for producing a coated sheet, in which there can be formed a coating layer simultaneously attaining an ink absorption rate and coating film cracking control suitable for use as an inkjet recording layer, in particular, there can be realized high gloss, high ink absorption, high printing density and high image quality required for use as a glossy inkjet recording sheet. There is provided a process for producing a coated sheet, comprising coating a support, or undercoat layer superimposed on the support, with a coating liquid containing a thermosensitive polymeric compound reversibly exhibiting hydrophilicity and hydrophobicity depending on temperature change, characterized in that the coating liquid containing a thermosensitive polymeric compound is applied concurrently with application of a treatment liquid whose temperature is in the range in which the thermosensitive polymeric compound exhibits hydrophilicity, or after the application of the treatment liquid without drying after the application.Type: ApplicationFiled: February 24, 2005Publication date: August 30, 2007Inventors: Ryu Kitamura, Kazuyoshi Wakata, Yasuto Tai, Motoko Hiraki, Shinichi Asano
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Publication number: 20050233098Abstract: An ink-jet recording paper which has at least as a surface layer a layer comprising: a copolymer obtained from two monomer compositions (A) and (B) which each comprises a monomer (a) and/or monomer (b) and at least one of which further contains a monomer (c) by polymerizing the monomer composition (A) and then copolymerizing the monomer composition (B), the difference in glass transition temperature between the polymer of the monomer composition (A) and the polymer of the monomer composition (B) being 5° C. or larger, and colloidal silica (2). The paper is improved in gloss in both unprinted areas and printed areas and in suitability for ink-jet recording, e.g., suitability for conveyance. (?-Methyl)styrene. Alkyl(meth)acrylate represented by the formula (1): wherein R1 represents hydrogen etc.; and R2 represents a C1-22 aliphatic hydrocarbon group. (c) ?,?-Unsaturated carboxylic acid and/or salt thereof.Type: ApplicationFiled: May 20, 2003Publication date: October 20, 2005Inventors: Shinichi Asano, Motoko Hiraki
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Publication number: 20040261964Abstract: Ink jet printing paper capable of providing, by using a low permeablity or a nonpermeable supporting sheet, a high surface glossiness and a high dot reproducibility of a silver halide photograph level, an excellent absorptivity of ink, and a high recording density, and preventing cockling by ink solvent, comprising the low permeablity or the nonpermeable supporting sheet, at least one ink receiving layer coated on the supporting sheet, and a luster layer coated on the ink receiving layer, the ink receiving layer in contact with the luster layer comprising pigment, as a main component, having a specific surface area-based mode diameter of pore distribution of 100 nm or less and an average secondary particle size of 1.3 &mgr;m or less, and the luster layer comprising pigment, as a main component, having an average primary particle size of 5 to 100 nm.Type: ApplicationFiled: May 5, 2004Publication date: December 30, 2004Inventors: Shinichi Asano, Motoko Hiraki, Tomomi Takahashi, Hiromasa Kondo, Takeshi Iida, Ryu Kitamura
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Patent number: 6248432Abstract: An ink jet recording sheet having an excellent jet ink-fixing property and heat-sealing property and capable of recording thereon ink images having excellent water resistance and light fastness has an ink receiving layer formed on a surface of a support sheet and including a binder and fine particles of a water-insoluble, amino group-containing resin having a total amine value of 5 to 500 and preferably a glass transition temperature of 15 to 250° C.Type: GrantFiled: October 9, 1997Date of Patent: June 19, 2001Assignees: Oji Paper Co., Ltd., Tohto Kasei Co., LTDInventors: Katsumi Moronuki, Motoko Hiraki, Yoshiaki Nakamura, Hideyasu Asakage
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Patent number: 6153074Abstract: A recording material having a compression modulus of elasticity of 650 kgf/cm.sup.2 or less in the direction of the thickness thereof and exhibiting a maximum strain of 0.08 or more generated under pressure of 40 kgf/cm.sup.2 in the thickness direction of the recording material, can record thereon electro-coagulated ink images with high clarity and color density by electro-coagulation printing.Type: GrantFiled: March 11, 1999Date of Patent: November 28, 2000Assignee: OJI Paper Co., Ltd.Inventors: Motoko Hiraki, Shinichi Nagasaki, Masayuki Kamei