Patents by Inventor Ryutaro KEMBO
Ryutaro KEMBO 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: 11965043Abstract: A resin particle includes a fluorescent colorant and a color pigment. A hue angle of the resin particle and a hue angle of the fluorescent colorant are different from each other. When a fluorescence peak wavelength in a spectral reflectance of the fluorescent colorant is represented by A (nm), an integrated value of a spectral reflectance (%) of the color pigment in a wavelength range of from A?30 (nm) to A+30 (nm) is 2,500 or more.Type: GrantFiled: July 6, 2020Date of Patent: April 23, 2024Assignee: FUJIFILM Business Innovation Corp.Inventors: Ryutaro Kembo, Masaru Takahashi, Yukiaki Nakamura, Tomoaki Tanaka, Satomi Hara
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Patent number: 11884816Abstract: A resin particle includes a binder resin; a fluorescent colorant A; and a colorant B other than the fluorescent colorant A, in which the resin particle includes a region RA in which a content of the fluorescent colorant A is larger than a content of the colorant B and a region RB in which a content of the colorant B is larger than a content of the fluorescent colorant A.Type: GrantFiled: July 22, 2020Date of Patent: January 30, 2024Assignee: FUJIFILM BUSINESS INNOVATION CORP.Inventors: Yukiaki Nakamura, Masaru Takahashi, Ryutaro Kembo
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Patent number: 11693339Abstract: A unit includes: a developing device configured to develop an electrostatic charge image that is formed on a surface of an image carrier, as a toner image with a developer including a flat toner containing a flat pigment, the developer being accommodated in the developing device; and a transfer device including an intermediate transfer belt onto which the toner image formed on the surface of the image carrier is primarily transferred, a primary transfer device configured to primarily transfer the toner image formed on the surface of the image carrier to a surface of the intermediate transfer belt, and a secondary transfer device configured to secondarily transfer the toner image on the surface of the intermediate transfer belt to a surface of a recording medium, wherein the intermediate transfer belt contains a resin and conductive carbon particles, and after the flat toner adheres to an outer circumferential surface of the intermediate transfer belt in a loading amount of 3 g/cm2, in a case where air is blowType: GrantFiled: August 9, 2021Date of Patent: July 4, 2023Assignee: FUJIFILM Business Innovation Corp.Inventors: Masato Ono, Masayuki Seko, Tomoaki Tanaka, Yukiaki Nakamura, Ryutaro Kembo
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Publication number: 20230104971Abstract: An electrostatic charge image developing toner set includes a toner A that contains a binder resin A and a dye, and a white toner B that contains a binder resin B and a titanium oxide pigment, in which an absolute value of a difference (?SP value) in solubility parameter between the binder resin A contained in the toner A and the binder resin B contained in the white toner B is 0.5 or greater.Type: ApplicationFiled: January 27, 2022Publication date: April 6, 2023Applicant: FUJIFILM Business Innovation Corp.Inventors: Ryutaro KEMBO, Yukiaki NAKAMURA, Tomoaki TANAKA
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Publication number: 20230105118Abstract: An electrostatic charge image developing toner includes a toner particle that contains a silicon phthalocyanine dye and a zirconium oxide particle.Type: ApplicationFiled: January 27, 2022Publication date: April 6, 2023Applicant: FUJIFILM Business Innovation Corp.Inventors: Tomoaki TANAKA, Yukiaki NAKAMURA, Ryutaro KEMBO
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Publication number: 20230103095Abstract: An electrostatic charge image developing toner includes a toner particle that contains a pyrazolotriazole-based dye and a zirconium oxide particle.Type: ApplicationFiled: January 26, 2022Publication date: March 30, 2023Applicant: FUJIFILM Business Innovation Corp.Inventors: Yukiaki NAKAMURA, Tomoaki TANAKA, Ryutaro KEMBO
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Publication number: 20220308484Abstract: A method for producing a toner for developing an electrostatic charge image includes: performing first aggregation that involves, in a dispersion containing first amorphous resin particles, aggregating at least the first amorphous resin particles; performing second aggregation that involves, in a dispersion that contains second amorphous resin particles and first aggregated particles obtained by aggregating the first amorphous resin particles, aggregating the second amorphous resin particles around the first aggregated particles; and heating a dispersion that contains second aggregated particles obtained by aggregating the second amorphous resin particles around the first aggregated particles so as to fuse and coalesce the second aggregated particles and form toner particles, in which a volume-average particle diameter DB of the second amorphous resin particles is smaller than a volume-average particle diameter DA of the first amorphous resin particles, and the first amorphous resin particles have a glass traType: ApplicationFiled: August 31, 2021Publication date: September 29, 2022Applicant: FUJIFILM Business Innovation Corp.Inventors: Ryutaro KEMBO, Yukiaki NAKAMURA, Masaru TAKAHASHI
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Publication number: 20220244663Abstract: A unit includes: a developing device configured to develop an electrostatic charge image that is formed on a surface of an image carrier, as a toner image with a developer including a flat toner containing a flat pigment, the developer being accommodated in the developing device; and a transfer device including an intermediate transfer belt onto which the toner image formed on the surface of the image carrier is primarily transferred, a primary transfer device configured to primarily transfer the toner image formed on the surface of the image carrier to a surface of the intermediate transfer belt, and a secondary transfer device configured to secondarily transfer the toner image on the surface of the intermediate transfer belt to a surface of a recording medium, wherein the intermediate transfer belt contains a resin and conductive carbon particles, and after the flat toner adheres to an outer circumferential surface of the intermediate transfer belt in a loading amount of 3 g/cm2, in a case where air is blowType: ApplicationFiled: August 9, 2021Publication date: August 4, 2022Applicant: FUJIFILM Business Innovation Corp.Inventors: Masato ONO, Masayuki SEKO, Tomoaki TANAKA, Yukiaki NAKAMURA, Ryutaro KEMBO
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Publication number: 20220244654Abstract: A toner for electrostatic image development includes toner particles containing a binder resin including an amorphous resin and a crystalline resin, a dye, and a release agent. The percentage of the crystalline resin on the surface of the toner particles as measured by X-ray photoelectron spectroscopy is 15% or less.Type: ApplicationFiled: September 30, 2021Publication date: August 4, 2022Applicant: FUJIFILM Business Innovation Corp.Inventors: Tomoaki TANAKA, Masaru TAKAHASHI, Yukiaki NAKAMURA, Ryutaro KEMBO, Kana NAGASHIMA
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Publication number: 20220244655Abstract: A toner for electrostatic image development includes toner particles containing a binder resin, a dye, and a release agent. When a cross section of the toner particles is observed, the percentage of the release agent present in regions whose distances from the surfaces of the toner particles are 400 nm or less is from 25% to 50% inclusive with respect to the total amount of the release agent.Type: ApplicationFiled: October 1, 2021Publication date: August 4, 2022Applicant: FUJIFILM Business Innovation Corp.Inventors: Kana NAGASHIMA, Masaru TAKAHASHI, Yukiaki NAKAMURA, Ryutaro KEMBO, Tomoaki TANAKA
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Patent number: 11131940Abstract: A toner for developing an electrostatic charge image includes a binder resin. In dynamic viscoelasticity measurement, a storage modulus G?50T of the toner at 50° C. is 2×106 Pa or more and 3×108 Pa or less, a storage modulus G?100T of the toner at 100° C. is 1×104 Pa or more and 1×106 Pa or less, and tan ?T of the toner in an entire temperature range of 50° C. or more and 100° C. or less is 0.05 or more and 1.5 or less.Type: GrantFiled: February 5, 2020Date of Patent: September 28, 2021Assignee: FUJIFILM Business Innovation Corp.Inventors: Shinya Sakamoto, Shinya Nakashima, Masaki Iwase, Tomohiro Shinya, Ryutaro Kembo, Tomohito Nakajima, Naomi Miyamoto
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Publication number: 20210253750Abstract: A resin particle includes a fluorescent colorant and a color pigment. A hue angle of the resin particle and a hue angle of the fluorescent colorant are different from each other. When a fluorescence peak wavelength in a spectral reflectance of the fluorescent colorant is represented by A (nm), an integrated value of a spectral reflectance (%) of the color pigment in a wavelength range of from A?30 (nm) to A+30 (nm) is 2,500 or more.Type: ApplicationFiled: July 6, 2020Publication date: August 19, 2021Applicant: FUJIFILM Business Innovation Corp.Inventors: Ryutaro KEMBO, Masaru TAKAHASHI, Yukiaki NAKAMURA, Tomoaki TANAKA, Satomi HARA
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Publication number: 20210253845Abstract: A resin particle includes a binder resin; a fluorescent colorant A; and a colorant B other than the fluorescent colorant A, in which the resin particle includes a region RA in which a content of the fluorescent colorant A is larger than a content of the colorant B and a region RB in which a content of the colorant B is larger than a content of the fluorescent colorant A.Type: ApplicationFiled: July 22, 2020Publication date: August 19, 2021Applicant: FUJI XEROX CO., LTD.Inventors: Yukiaki NAKAMURA, Masaru TAKAHASHI, Ryutaro KEMBO
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Publication number: 20210253846Abstract: A resin particle includes a fluorescent colorant and a binder resin. The fluorescent colorant is bound to the binder resin by a chemical bond.Type: ApplicationFiled: July 1, 2020Publication date: August 19, 2021Applicant: FUJI XEROX CO., LTD.Inventors: Yukiaki NAKAMURA, Masaru TAKAHASHI, Tomoaki TANAKA, Satomi HARA, Ryutaro KEMBO
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Patent number: 10866532Abstract: An electrostatic charge image developing toner includes a polar group-containing olefin resin that is a polymer of a composition containing at least one nonpolar monomer unit (X) selected from the group consisting of ethylene and ?-olefin having 3 to 10 carbon atoms, a polar monomer unit (Y) having at least one of a maleic acid group and a maleic anhydride group, and a monomer unit (Z) having a polymerizability to at least one of the nonpolar monomer unit (X) and the polar monomer unit (Y), in which an acid value of the toner is 10 mgKOH/g to 60 mgKOH/g.Type: GrantFiled: August 5, 2019Date of Patent: December 15, 2020Assignee: FUJI XEROX CO., LTD.Inventors: Tomohiro Shinya, Naomi Miyamoto, Tomohito Nakajima, Shinya Nakashima, Shinya Sakamoto, Masaki Iwase, Ryutaro Kembo
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Patent number: 10795274Abstract: An electrostatic charge image developing toner includes a continuous phase containing a binder resin (i); and a discontinuous phase that has a core containing a binder resin (ii) and a coating layer covering the core and containing a binder resin (iii), and is dispersed in the continuous phase.Type: GrantFiled: August 5, 2019Date of Patent: October 6, 2020Assignee: FUJI XEROX CO., LTD.Inventors: Shinya Nakashima, Shinya Sakamoto, Tomohiro Shinya, Naomi Miyamoto, Masaki Iwase, Ryutaro Kembo, Tomohito Nakajima
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Publication number: 20200310270Abstract: An electrostatic charge image developing toner includes a continuous phase containing a binder resin (i); and a discontinuous phase that has a core containing a binder resin (ii) and a coating layer covering the core and containing a binder resin (iii), and is dispersed in the continuous phase.Type: ApplicationFiled: August 5, 2019Publication date: October 1, 2020Applicant: Fuji Xerox Co., Ltd.Inventors: Shinya Nakashima, Shinya Sakamoto, Tomohiro Shinya, Naomi Miyamoto, Masaki Iwase, Ryutaro Kembo, Tomohito Nakajima
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Publication number: 20200310269Abstract: An electrostatic charge image developing toner includes a polar group-containing olefin resin that is a polymer of a composition containing at least one nonpolar monomer unit (X) selected from the group consisting of ethylene and ?-olefin having 3 to 10 carbon atoms, a polar monomer unit (Y) having at least one of a maleic acid group and a maleic anhydride group, and a monomer unit (Z) having a polymerizability to at least one of the nonpolar monomer unit (X) and the polar monomer unit (Y), in which an acid value of the toner is 10 mgKOH/g to 60 mgKOH/g.Type: ApplicationFiled: August 5, 2019Publication date: October 1, 2020Applicant: FUJI XEROX CO., LTD.Inventors: Tomohiro SHINYA, Naomi Miyamoto, Tomohito Nakajima, Shinya Nakashima, Shinya Sakamoto, Masaki Iwase, Ryutaro Kembo
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Publication number: 20200310271Abstract: A toner for developing an electrostatic charge image includes a binder resin. In dynamic viscoelasticity measurement, a storage modulus G?50T of the toner at 50° C. is 2×106 Pa or more and 3×108 Pa or less, a storage modulus G?100T of the toner at 100° C. is 1×104 Pa or more and 1×106 Pa or less, and tan ?T of the toner in an entire temperature range of 50° C. or more and 100° C. or less is 0.05 or more and 1.5 or less.Type: ApplicationFiled: February 5, 2020Publication date: October 1, 2020Applicant: FUJI XEROX CO., LTD.Inventors: Shinya SAKAMOTO, Shinya NAKASHIMA, Masaki IWASE, Tomohiro SHINYA, Ryutaro KEMBO, Tomohito NAKAJIMA, Naomi MIYAMOTO
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Patent number: 10670983Abstract: A toner set includes a white toner that includes white toner particles containing white colored particles, and at least one selected from a color toner that includes color toner particles containing colored particles and a transparent toner that includes transparent toner particles, wherein an average circularity of the white toner particles is smaller than an average circularity of either the color toner particles or the transparent toner particles and a small-diameter-side number particle diameter distribution index of the white toner particles is greater than a small-diameter-side number particle diameter distribution index of either the color toner particles or the transparent toner particles.Type: GrantFiled: May 5, 2017Date of Patent: June 2, 2020Assignee: FUJI XEROX CO., LTD.Inventors: Tetsuya Taguchi, Tomoaki Tanaka, Shinya Sakamoto, Ryutaro Kembo