Patents by Inventor Masanobu Ootsuka
Masanobu Ootsuka 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: 20220169060Abstract: A thermosensitive recording medium having a thermosensitive coloring layer containing an electron-donating dye precursor, a radical photopolymerization initiator, and an electron-accepting compound with a radical polymerizable group, wherein the electron-accepting compound with a radical polymerizable group includes a compound A represented by the formula (1):Type: ApplicationFiled: November 19, 2021Publication date: June 2, 2022Inventors: Ayano Mashida, Yasuhiro Aichi, Masanobu Ootsuka, Junji Ito
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Publication number: 20220024238Abstract: A thermosensitive recording medium 100 includes a support 50, and a first thermosensitive coloring layer 10, a first intermediate layer 15, and a second thermosensitive coloring layer 20 disposed on the support 50 in descending order of distance from the support 50. The first thermosensitive coloring layer 10 and the second thermosensitive coloring layer 20 each contain an electron-donating dye precursor, an electron-accepting compound, a radical-polymerizable compound, and a photoradical polymerization initiator, and the first intermediate layer 15 contains a UV absorber.Type: ApplicationFiled: August 23, 2021Publication date: January 27, 2022Inventors: Akihiro Taya, Junji Ito, Yasuhiro Aichi, Ayano Mashida, Masanobu Ootsuka, Yutaka Yoshimasa
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Publication number: 20210380824Abstract: Provided is a thermosensitive recording medium including a thermosensitive coloring layer containing an electron-donating dye precursor, an electron-accepting compound, a radical polymerizable compound and a photoradical polymerization initiator, in which the radical polymerizable compound is a compound that is solid at 25° C., and the radical polymerizable compound is contained in the thermosensitive coloring layer in a state of encapsulating at least one of the electron-donating dye precursor and the electron-accepting compound.Type: ApplicationFiled: August 23, 2021Publication date: December 9, 2021Inventors: Yutaka Yoshimasa, Junji Ito, Yasuhiro Aichi, Ayano Mashida, Akihiro Taya, Masanobu Ootsuka
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Publication number: 20210313098Abstract: A magnet includes hard magnetic particles containing a rare-earth metal, and a soft magnetic material interposed between the hard magnetic particles to bind together the hard magnetic particles.Type: ApplicationFiled: June 10, 2021Publication date: October 7, 2021Inventors: Daisuke Sasaguri, Masanobu Ootsuka, Naoki Nishimura
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Patent number: 10889116Abstract: An image printing method includes the step of applying at least two inks that contain a color pigment, resin particles, and water onto a printing medium by ejecting the inks using an inkjet printing apparatus. The inkjet printing apparatus includes at least two printing heads sequentially arranged in a printing medium conveying direction, the printing medium is normal paper or a high-absorbency printing medium, a rub fastness additive is contained in a first ink ejected from at least a first printing head that is located at an uppermost-stream position in the printing medium conveying direction of the at least two printing heads, and the content of the rub fastness additive in an ink ejected from a printing head that is located at a position downstream of the first printing head in the printing medium conveying direction is less than the content of the rub fastness additive in the first ink.Type: GrantFiled: July 18, 2018Date of Patent: January 12, 2021Assignee: CANON KABUSHIKI KAISHAInventors: Takaharu Aotani, Masahiro Terada, Hidetaka Kawamura, Akihiro Taya, Yohei Masada, Masanobu Ootsuka, Shoji Koike, Yutaka Yoshimasa
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Patent number: 10836921Abstract: An aqueous ink for ink jet includes a coloring material, a solvent, and a surfactant having an HLB value of 9.0 or less. The solvent includes a solvent A having a solubility in water at 20° C. of 5.00 g/100 g-H2O or less and a solvent B other than the solvent A. The solvent A includes an alcohol having a vapor pressure at 20° C. of 0.5 mmHg or less and a surface tension of 30.0 mN/m or more. The content of the alcohol in the aqueous ink is 0.7 or more times the solubility in water at 20° C. in an equal amount to the aqueous ink. The solvent B has a partition coefficient (PB) satisfying the following equation (1). 1.44 Log PA?0.1x?3.4?Log PB??0.Type: GrantFiled: December 12, 2017Date of Patent: November 17, 2020Assignee: Canon Kabushiki KaishaInventors: Akihiro Taya, Masahiro Terada, Hidetaka Kawamura, Yohei Masada, Masanobu Ootsuka, Takaharu Aotani, Yutaka Yoshimasa, Shoji Koike
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Publication number: 20200243231Abstract: A composite magnetic material includes a soft magnetic phase including a magnetic material containing a ferromagnetic material including Fe or Co as a main component and a plurality of hard magnetic particles present and dispersed in a form of islands in the soft magnetic phase. The hard magnetic particles have an average particle size of 2 nm or more and include a magnetic material containing a ferrimagnetic material or an antiferromagnetic material as a main component while they are present with an average inter-particle distance of 100 nm or less in the soft magnetic phase. The composite magnetic material has excellent magnetic properties and can be made into a lightweight magnet to be used e.g. in a motor of an aircraft.Type: ApplicationFiled: April 13, 2020Publication date: July 30, 2020Inventors: Daisuke Sasaguri, Naoki Nishimura, Masanobu Ootsuka
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Patent number: 10525725Abstract: There is provided an image recording method including applying a first ink and a second ink, each of which contains a surfactant and the like, to a recording medium. Critical micelle concentration c1 (mass %) of the surfactant and concentration c2 (mass %) of the surfactant in each ink satisfy a relationship of “c1×2?c2”; an HLB value of the surfactant is smaller than 13; content V1 (mass %) of the surfactant in the first ink is larger than content V2 (mass %) of the surfactant in the second ink.Type: GrantFiled: September 6, 2017Date of Patent: January 7, 2020Assignee: Canon Kabushiki KaishaInventors: Akihiro Taya, Masahiro Terada, Hidetaka Kawamura, Yohei Masada, Masanobu Ootsuka, Takaharu Aotani, Yutaka Yoshimasa, Shoji Koike
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Patent number: 10513623Abstract: An aqueous ink according to the present invention is an aqueous ink for ink jet, containing a solvent A and a resin particle. The solvent A is alcohol of which aqueous solubility at 20° C. is 5% by mass or less, a vapor pressure at 20° C. is 0.5 mmHg or less and a surface tension at 20° C. is 30 mN/m or more. A content (% by mass) of the solvent A is 0.7 times or more to 7.0 times or less in terms of a ratio based on aqueous solubility (% by mass) of the solvent A at 20° C. The amount of a surface anionic functional group of the resin particle is 0.55 mmol/g or more to 2.00 mmol/g or less.Type: GrantFiled: July 19, 2018Date of Patent: December 24, 2019Assignee: Canon Kabushiki KaishaInventors: Masanobu Ootsuka, Masahiro Terada, Hidetaka Kawamura, Akihiro Taya, Yohei Masada, Takaharu Aotani, Shoji Koike, Yutaka Yoshimasa
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Patent number: 10280322Abstract: An ink including a first pigment, a second pigment, and water. The first pigment satisfies condition 1, the second pigment satisfies condition 2, and the content (% by mass) of the first pigment relative to the content (% by mass) of the second pigment based on a total mass of the ink is 1.7 times or more to 8.0 times or less in terms of mass ratio. Condition 1: When, to a pigment dispersion liquid containing the first pigment, calcium chloride is added so as to give a predetermined concentration, the particle diameter increase rate of the solid content is 2.0 nm/second or more. Condition 2: When, to a pigment dispersion liquid containing the second pigment, hydrochloric acid is added so as to give a predetermined concentration, the particle diameter increase rate of the solid content is 0.5 nm/second or less.Type: GrantFiled: October 11, 2017Date of Patent: May 7, 2019Assignee: Canon Kabushiki KaishaInventors: Yohei Masada, Masahiro Terada, Hidetaka Kawamura, Akihiro Taya, Masanobu Ootsuka, Takaharu Aotani, Shoji Koike, Yutaka Yoshimasa
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Patent number: 10253194Abstract: There is provided an ink including a pigment, resin particles, a surfactant, water-soluble organic compound, and water, in which: the content of the water-soluble organic compounds is 35 mass % or less based on a total mass of the ink; the water-soluble organic compound contains a first water-soluble organic compound being liquid at 25° C. and having a surface tension at 25° C.Type: GrantFiled: September 30, 2016Date of Patent: April 9, 2019Assignee: Canon Kabushiki KaishaInventors: Yutaka Yoshimasa, Masahiro Terada, Hidetaka Kawamura, Akihiro Taya, Yohei Masada, Masanobu Ootsuka, Takaharu Aotani, Shoji Koike
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Patent number: 10196532Abstract: Provided is an ink containing a pigment, a water-soluble organic solvent, and a surfactant represented by the following general formula (1), and having a viscosity at 25° C. of 5 mPa·s or more. The ink has a static surface tension of 27.1 mN/m or more and 35.0 mN/m or less, which is measured at 25° C. by a Wilhelmy method. The ink also has a dynamic surface tension at a bubble life time of 150 msec of 30.5 mN/m or more and 37.0 mN/m or less, which is measured at 25° C. by a maximum bubble pressure method.Type: GrantFiled: September 30, 2016Date of Patent: February 5, 2019Assignee: Canon Kabushiki KaishaInventors: Hidetaka Kawamura, Masahiro Terada, Akihiro Taya, Yohei Masada, Masanobu Ootsuka, Takaharu Aotani, Yutaka Yoshimasa, Shoji Koike
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Publication number: 20190031900Abstract: An aqueous ink according to the present invention is an aqueous ink for ink jet, containing a solvent A and a resin particle. The solvent A is alcohol of which aqueous solubility at 20° C. is 5% by mass or less, a vapor pressure at 20° C. is 0.5 mmHg or less and a surface tension at 20° C. is 30 mN/m or more. A content (% by mass) of the solvent A is 0.7 times or more to 7.0 times or less in terms of a ratio based on aqueous solubility (% by mass) of the solvent A at 20° C. The amount of a surface anionic functional group of the resin particle is 0.55 mmol/g or more to 2.00 mmol/g or less.Type: ApplicationFiled: July 19, 2018Publication date: January 31, 2019Inventors: Masanobu Ootsuka, Masahiro Terada, Hidetaka Kawamura, Akihiro Taya, Yohei Masada, Takaharu Aotani, Shoji Koike, Yutaka Yoshimasa
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Patent number: 10190010Abstract: Provided is an ink containing a pigment, a water-soluble organic solvent, and a surfactant, and having a viscosity at 25° C. of 5 mPa·s or more. The ink has a static surface tension of 30.5 mN/m or more to 35.0 mN/m or less, which is measured at 25° C. by a Wilhelmy method. The ink also has a dynamic surface tension at a bubble life time of 150 msec of 30.5 mN/m or more to 37.0 mN/m or less, which is measured at 25° C. by a maximum bubble pressure method.Type: GrantFiled: September 30, 2016Date of Patent: January 29, 2019Assignee: Canon Kabushiki KaishaInventors: Hidetaka Kawamura, Masahiro Terada, Akihiro Taya, Yohei Masada, Masanobu Ootsuka, Takaharu Aotani, Yutaka Yoshimasa, Shoji Koike
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Patent number: 10167399Abstract: Provided is Ink including a pigment, a resin, a water-soluble organic solvent, and water, wherein a solid content of first liquid as prepared by diluting the ink 500-fold with water and by adding CaCl2 at a concentration of 1.5 mM has a rate of aggregation of 1.5 nm/second or less; and a solid content of second liquid as prepared, after the ink has been stored at 60° C. for 2 weeks, by diluting the ink 500-fold with water and by adding CaCl2 at a concentration of 5 mM has a rate of aggregation of 2.0 nm/second or more.Type: GrantFiled: September 30, 2016Date of Patent: January 1, 2019Assignee: Canon Kabushiki KaishaInventors: Yohei Masada, Masahiro Terada, Hidetaka Kawamura, Akihiro Taya, Masanobu Ootsuka, Takaharu Aotani, Shoji Koike, Yutaka Yoshimasa
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Publication number: 20180371272Abstract: An aqueous inkjet ink of the present invention contains: a solvent A; a resin particle; and a color material, wherein the solvent A is an alcohol having a water solubility at 20° C. of 5% by mass or less, the vapor pressure at 20° C. of 0.5 mmHg or less, and the surface tension at 20° C. of 30 mN/m or more; the ratio of the content (% by mass) of the solvent A to the water solubility (% by mass) of the solvent A at 20° C. is 0.7 or more and 7.0 or less; and the SP value of the resin particle is 8.1 (cal/cm3)0.5 or more and 9.7 (cal/cm3)0.5 or less.Type: ApplicationFiled: June 18, 2018Publication date: December 27, 2018Inventors: Hidetaka Kawamura, Masahiro Terada, Akihiro Taya, Yohei Masada, Masanobu Ootsuka, Takaharu Aotani, Yutaka Yoshimasa, Shoji Koike
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Publication number: 20180319164Abstract: An image printing method includes the step of applying at least two inks that contain a color pigment, resin particles, and water onto a printing medium by ejecting the inks using an inkjet printing apparatus. The inkjet printing apparatus includes at least two printing heads sequentially arranged in a printing medium conveying direction, the printing medium is normal paper or a high-absorbency printing medium, a rub fastness additive is contained in a first ink ejected from at least a first printing head that is located at an uppermost-stream position in the printing medium conveying direction of the at least two printing heads, and the content of the rub fastness additive in an ink ejected from a printing head that is located at a position downstream of the first printing head in the printing medium conveying direction is less than the content of the rub fastness additive in the first ink.Type: ApplicationFiled: July 18, 2018Publication date: November 8, 2018Inventors: Takaharu Aotani, Masahiro Terada, Hidetaka Kawamura, Akihiro Taya, Yohei Masada, Masanobu Ootsuka, Shoji Koike, Yutaka Yoshimasa
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Publication number: 20180179408Abstract: An aqueous ink for ink jet includes a coloring material, a solvent, and a surfactant having an HLB value of 9.0 or less. The solvent includes a solvent A having a solubility in water at 20° C. of 5.00 g/100 g-H2O or less and a solvent B other than the solvent A. The solvent A includes an alcohol having a vapor pressure at 20° C. of 0.5 mmHg or less and a surface tension of 30.0 mN/m or more. The content of the alcohol in the aqueous ink is 0.7 or more times the solubility in water at 20° C. in an equal amount to the aqueous ink. The solvent B has a partition coefficient (PB) satisfying the following equation (1). 1.44 Log PA?0.1x?3.4?Log PB??0.Type: ApplicationFiled: December 12, 2017Publication date: June 28, 2018Inventors: Akihiro Taya, Masahiro Terada, Hidetaka Kawamura, Yohei Masada, Masanobu Ootsuka, Takaharu Aotani, Yutaka Yoshimasa, Shoji Koike
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Publication number: 20180112091Abstract: An ink including a first pigment, a second pigment, and water. The first pigment satisfies condition 1, the second pigment satisfies condition 2, and the content (% by mass) of the first pigment relative to the content (% by mass) of the second pigment based on a total mass of the ink is 1.7 times or more to 8.0 times or less in terms of mass ratio. Condition 1: When, to a pigment dispersion liquid containing the first pigment, calcium chloride is added so as to give a predetermined concentration, the particle diameter increase rate of the solid content is 2.0 nm/second or more. Condition 2: When, to a pigment dispersion liquid containing the second pigment, hydrochloric acid is added so as to give a predetermined concentration, the particle diameter increase rate of the solid content is 0.5 nm/second or less.Type: ApplicationFiled: October 11, 2017Publication date: April 26, 2018Inventors: Yohei Masada, Masahiro Terada, Hidetaka Kawamura, Akihiro Taya, Masanobu Ootsuka, Takaharu Aotani, Shoji Koike, Yutaka Yoshimasa
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Publication number: 20180079221Abstract: There is provided an image recording method including applying a first ink and a second ink, each of which contains a surfactant and the like, to a recording medium. Critical micelle concentration c1 (mass %) of the surfactant and concentration c2 (mass %) of the surfactant in each ink satisfy a relationship of “c1×2?c2”; an HLB value of the surfactant is smaller than 13; content V1 (mass %) of the surfactant in the first ink is larger than content V2 (mass %) of the surfactant in the second ink.Type: ApplicationFiled: September 6, 2017Publication date: March 22, 2018Inventors: Akihiro Taya, Masahiro Terada, Hidetaka Kawamura, Yohei Masada, Masanobu Ootsuka, Takaharu Aotani, Yutaka Yoshimasa, Shoji Koike