Patents by Inventor Kouichirou Ochi
Kouichirou Ochi 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: 20240118639Abstract: A thermal treatment apparatus includes a treatment tank including a treatment chamber to perform thermal treatment on toner particles; a toner particle supply unit configured to supply toner particles into the treatment chamber; and a hot air supply unit including a supply port to supply hot air into the treatment chamber. The supply port of the hot air supply unit is disposed on a ceiling of the treatment chamber. The treatment tank further includes: a columnar member that is vertically disposed at the center inside of the treatment chamber; and a protruded member that is disposed at an upper end of the columnar member and has an approximately conical shape protruding toward the ceiling. The columnar member has a cylindrical shape and a radius of curvature RCP (mm) of an upper end edge in a vertical cross-section thereof is 5<RCP<75.Type: ApplicationFiled: September 29, 2023Publication date: April 11, 2024Inventors: TAKESHI OHTSU, KOH ISHIGAMI, KOUICHIROU OCHI, YOSUKE IWASAKI, DAISUKE YAMASHITA, HISASUKE KAJIHARA
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Publication number: 20240004324Abstract: A yellow toner including a toner particle including a binder resin, a crystalline resin, and C.I. Pigment Yellow 180, a content of the C.I. Pigment Yellow 180 is 3% by mass or more and 15% by mass or less with respect to a mass of the toner, the C.I. Pigment Yellow 180 is in a form of plate-like particles each having a plate-like shape, and when the C.I. Pigment Yellow 180 is observed with a scanning electron microscope, the plate-like particles of the C.I. Pigment Yellow 180 satisfy the following relationships: S/Z?10.0; and 50?S?300, where the S (nm) represents a number average of circle-equivalent diameters calculated from areas of surfaces having largest areas of the plate-like particles, and the Z (nm) represents a number average of widths in directions perpendicular to the surfaces having the largest areas of the plate-like particles.Type: ApplicationFiled: June 14, 2023Publication date: January 4, 2024Inventors: KOUICHIROU OCHI, MASAYUKI HAMA, HAYATO IDA
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Publication number: 20230152725Abstract: A toner comprising a toner particle comprising an organic pigment and a binder resin, wherein, in a solid-state NMR measurement at 60° C. using a solid fraction obtained by specific procedure for dissolving the toner in chloroform as a sample, a transverse relaxation time T2 of a peak observed between 1.5 and 2.5 ppm is from 0.08 to 0.13 ms.Type: ApplicationFiled: November 8, 2022Publication date: May 18, 2023Inventors: Kouichirou Ochi, Masayuki Hama, Yuka Gunji, Hayato Ida, Kaoru Yoshida
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Patent number: 11624987Abstract: A liquid developer comprising: a toner particle containing binder resin; a carrier liquid; and a basic toner particle dispersing agent, wherein the basic toner particle dispersing agent is a primary amine, an acid value of the binder resin is at least 10 mg KOH/g, an acid value of a component having a molecular weight of not more than 2,000 contained in the binder resin is not more than 5 mg KOH/g, and a hydroxyl value of the component having a molecular weight of not more than 2,000 contained in the binder resin is not more than 10 mg KOH/g.Type: GrantFiled: September 14, 2020Date of Patent: April 11, 2023Assignee: CANON KABUSHIKI KAISHAInventors: Yuzo Tokunaga, Takashi Hirasa, Yasutaka Akashi, Masato Nakajima, Naohiko Tsuchida, Akifumi Matsubara, Kohji Takenaka, Yuya Chimoto, Kouichirou Ochi, Tomoyo Miyakai
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Publication number: 20220342335Abstract: A toner comprising a toner particle comprising a colorant, a binder resin, and calcium carbonate particles, wherein an amount of the colorant in the toner particle is from 1.0 to 20.0% by mass; the binder resin comprises a polyester resin; the polyester resin has an aromatic ring concentration of from 50 to 70 mol %; a surface of the calcium carbonate particles is coated with a fatty acid; an amount of the calcium carbonate particles in the toner particle is from 1.0 to 15.0% by mass; a number average particle diameter of the calcium carbonate particles is from 150 nm to 800 nm.Type: ApplicationFiled: April 13, 2022Publication date: October 27, 2022Inventors: Kouichirou Ochi, Masayuki Hama, Hayato Ida, Yuya Chimoto, Hisasuke Kajihara
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Patent number: 11385558Abstract: A toner has a toner particle containing a resin having an acid group, an aluminum pigment, and a fatty acid metal salt, wherein an acid value of the resin having an acid group is in a range of from 5 mg KOH/g to 25 mg KOH/g, and an amount of the resin having the acid group is 50% by mass or more; an amount of the aluminum pigment is in a range of from 10% by mass to 40% by mass; the fatty acid metal salt is represented by formula (R—COO)pM(OH)q; and an amount thereof is in a range of from 1 part by mass to 10 parts by mass based on 100 parts by mass of the aluminum pigment.Type: GrantFiled: June 16, 2020Date of Patent: July 12, 2022Assignee: CANON KABUSHIKI KAISHAInventors: Yuya Chimoto, Kouichirou Ochi, Tomoyo Miyakai, Takashi Hirasa
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Publication number: 20220197174Abstract: A toner having high rub resistance is provided. A toner including a toner particle containing a binder resin and a calcium carbonate particle, wherein in X-ray diffractometry of the toner particle by CuK? radiation, when the Bragg angle is defined as ?, (i) the calcium carbonate particle has peaks at 2? of 26.5°±0.5° and 29.5°±0.5°, (ii) a crystallite diameter of crystals thereof attributed to 2?=29.5°±0.5° is 10 nm or more and 45 nm or less, and (iii) the ratio (a/b) of a peak intensity “a” at 2?=26.5°±0.5° to a peak intensity “b” at 20?=29.5°±0.5° is 0.15 or more and 0.24 or less.Type: ApplicationFiled: November 29, 2021Publication date: June 23, 2022Inventors: Hisasuke Kajihara, Yuya Chimoto, Hayato Ida, Kouichirou Ochi, Kazuhisa Shirayama, Masayuki Hama
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Publication number: 20220197166Abstract: A toner including a toner particle which contains: a resin component containing a binder resin; and an inorganic fine particle, the inorganic fine particle is at least one inorganic fine particle selected from the group consisting of (i) a particle containing CaCO3, (ii) a particle containing BaSO4, (iii) a particle containing Mg3Si4O10(OH)2, and (iv) a particle containing Al2Si2O5(OH)4, a number average particle diameter Dc of a primary particle of the inorganic fine particle is 100 nm or more and 1000 nm or less, when a cross section of the toner particle is observed, an inorganic fine particle domain A having a dispersion diameter of 2.0 times or more of Dc is present in the cross section, and the inorganic fine particle and the inorganic fine particle domain A occupy a specific percentage of an area in the cross section of the toner particle.Type: ApplicationFiled: December 6, 2021Publication date: June 23, 2022Inventors: Yuya Chimoto, Masayuki Hama, Hayato Ida, Kouichirou Ochi, Kazuhisa Shirayama, Hisasuke Kajihara
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Patent number: 11194260Abstract: A white toner including toner particles each of which contains a binder resin and a white pigment whose content is 20 to 80 mass % or less, wherein the binder resin contains a polymer A having a first and a second monomer unit, wherein the content of the first monomer unit is 5.0 to 60.0 mol % with respect to the total number of moles of all monomer units in the polymer A, wherein the content of the second monomer unit is 20.0 to 95.0 mol % with respect to the total number of moles of all the monomer units in the polymer A, wherein the SP value of the first monomer unit and the SP value of the second monomer unit satisfy specific relations, and wherein the white pigment has a total amount of a surface acidic group amount and a surface basic group amount of 60 ?mol/g or more.Type: GrantFiled: May 11, 2020Date of Patent: December 7, 2021Assignee: Canon Kabushiki KaishaInventors: Kouichirou Ochi, Hayato Ida, Yuya Chimoto, Katsuyuki Hotta
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Patent number: 11181848Abstract: A liquid developer containing a liquid carrier and a toner particle that is insoluble in the liquid carrier, wherein a particular substructure is bonded through a covalent bond to a surface of the toner particle, and a method of producing a liquid developer containing a liquid carrier and a toner particle that is insoluble in the liquid carrier, the method comprising a step (I) of covalently bonding, to a surface of the toner particle, a compound having a particular substructure.Type: GrantFiled: February 19, 2020Date of Patent: November 23, 2021Assignee: CANON KABUSHIKI KAISHAInventors: Kouichirou Ochi, Yuzo Tokunaga, Tomoyo Miyakai, Akifumi Matsubara, Takashi Hirasa, Hayato Ida, Yasutaka Akashi
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Patent number: 11112711Abstract: A white toner comprising a toner particle wherein the toner particle includes a binder resin and a calcium titanate particle, the binder resin has an acid value, and a content of the calcium titanate particle in the toner is in the range of from 25 mass % to 80 mass %.Type: GrantFiled: July 8, 2020Date of Patent: September 7, 2021Assignee: CANON KABUSHIKI KAISHAInventors: Kouichirou Ochi, Yuya Chimoto, Tomoyo Miyakai, Takashi Hirasa
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Patent number: 11029617Abstract: A white toner comprising a toner particle including a binder resin, an inorganic white pigment, and a polyvalent metal salt compound, wherein the inorganic white pigment has an acidic group at a surface thereof; an amount of the inorganic white pigment in the toner particle is 10% to 50% by volume; the polyvalent metal salt compound is a specific compound; an absolute value of the difference between an SP value (J/cm3)1/2 of the binder resin and that of the polyvalent metal salt compound is 0.0 to 6.0; and an amount of the polyvalent metal salt compound, an amount of a polyvalent metal, the amount of the inorganic white pigment, and an amount of the acidic group at a surface of the inorganic white pigment satisfy a specific relationship.Type: GrantFiled: March 11, 2020Date of Patent: June 8, 2021Assignee: CANON KABUSHIKI KAISHAInventors: Yuya Chimoto, Kouichirou Ochi, Hayato Ida
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Publication number: 20210080848Abstract: A liquid developer containing: a toner containing a binder resin; a carrier liquid; and a basic toner dispersing agent, wherein the binder resin contains a polylactic acid, the polylactic acid has an acid value of at least 5 mg KOH/g, and a content of the polylactic acid in the binder resin is at least 50 mass %.Type: ApplicationFiled: September 4, 2020Publication date: March 18, 2021Inventors: Naohiko Tsuchida, Takashi Hirasa, Yasutaka Akashi, Masato Nakajima, Yuzo Tokunaga, Kohji Takenaka, Akifumi Matsubara, Yuya Chimoto, Kouichirou Ochi, Tomoyo Miyakai
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Publication number: 20200409285Abstract: A liquid developer comprising: a toner particle containing binder resin; a carrier liquid; and a basic toner particle dispersing agent, wherein the basic toner particle dispersing agent is a primary amine, an acid value of the binder resin is at least 10 mg KOH/g, an acid value of a component having a molecular weight of not more than 2,000 contained in the binder resin is not more than 5 mg KOH/g, and a hydroxyl value of the component having a molecular weight of not more than 2,000 contained in the binder resin is not more than 10 mg KOH/g.Type: ApplicationFiled: September 14, 2020Publication date: December 31, 2020Inventors: Yuzo Tokunaga, Takashi Hirasa, Yasutaka Akashi, Masato Nakajima, Naohiko Tsuchida, Akifumi Matsubara, Kohji Takenaka, Yuya Chimoto, Kouichirou Ochi, Tomoyo Miyakai
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Publication number: 20200409284Abstract: A liquid developer comprising a toner particle, a carrier liquid, and a basic toner particle dispersing agent, wherein the toner particle contains a polyester resin A, and the polyester resin A contains at least one monomer unit selected from the group consisting of monomer units derived from aliphatic monocarboxylic acids having from 1 to 6 carbons and monomer units derived from aromatic monocarboxylic acids having from 7 to 12 carbons.Type: ApplicationFiled: September 14, 2020Publication date: December 31, 2020Inventors: Akifumi Matsubara, Naohiko Tsuchida, Kohji Takenaka, Tomoyo Miyakai, Kouichirou Ochi, Yuya Chimoto, Masato Nakajima, Yasutaka Akashi, Takashi Hirasa, Yuzo Tokunaga
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Publication number: 20200363747Abstract: A white toner including toner particles each of which contains a binder resin and a white pigment whose content is 20 to 80 mass % or less, wherein the binder resin contains a polymer A having a first and a second monomer unit, wherein the content of the first monomer unit is 5.0 to 60.0 mol % with respect to the total number of moles of all monomer units in the polymer A, wherein the content of the second monomer unit is 20.0 to 95.0 mol % with respect to the total number of moles of all the monomer units in the polymer A, wherein the SP value of the first monomer unit and the SP value of the second monomer unit satisfy specific relations, and wherein the white pigment has a total amount of a surface acidic group amount and a surface basic group amount of 60 ?mol/g or more.Type: ApplicationFiled: May 11, 2020Publication date: November 19, 2020Inventors: Kouichirou Ochi, Hayato Ida, Yuya Chimoto, Katsuyuki Hotta
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Publication number: 20200341396Abstract: A white toner comprising a toner particle wherein the toner particle includes a binder resin and a calcium titanate particle, the binder resin has an acid value, and a content of the calcium titanate particle in the toner is in the range of from 25 mass % to 80 mass %.Type: ApplicationFiled: July 8, 2020Publication date: October 29, 2020Inventors: Kouichirou Ochi, Yuya Chimoto, Tomoyo Miyakai, Takashi Hirasa
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Publication number: 20200310273Abstract: A toner has a toner particle containing a resin having an acid group, an aluminum pigment, and a fatty acid metal salt, wherein an acid value of the resin having an acid group is in a range of from 5 mg KOH/g to 25 mg KOH/g, and an amount of the resin having the acid group is 50% by mass or more; an amount of the aluminum pigment is in a range of from 10% by mass to 40% by mass; the fatty acid metal salt is represented by formula (R—COO)pM(OH)q; and an amount thereof is in a range of from 1 part by mass to 10 parts by mass based on 100 parts by mass of the aluminum pigment.Type: ApplicationFiled: June 16, 2020Publication date: October 1, 2020Inventors: Yuya Chimoto, Kouichirou Ochi, Tomoyo Miyakai, Takashi Hirasa
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Publication number: 20200301301Abstract: A white toner comprising a toner particle including a binder resin, an inorganic white pigment, and a polyvalent metal salt compound, wherein the inorganic white pigment has an acidic group at a surface thereof; an amount of the inorganic white pigment in the toner particle is 10% to 50% by volume; the polyvalent metal salt compound is a specific compound; an absolute value of the difference between an SP value (J/cm3)1/2 of the binder resin and that of the polyvalent metal salt compound is 0.0 to 6.0; and an amount of the polyvalent metal salt compound, an amount of a polyvalent metal, the amount of the inorganic white pigment, and an amount of the acidic group at a surface of the inorganic white pigment satisfy a specific relationship.Type: ApplicationFiled: March 11, 2020Publication date: September 24, 2020Inventors: Yuya Chimoto, Kouichirou Ochi, Hayato Ida
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Publication number: 20200272068Abstract: A liquid developer containing a liquid carrier and a toner particle that is insoluble in the liquid carrier, wherein a particular substructure is bonded through a covalent bond to a surface of the toner particle, and a method of producing a liquid developer containing a liquid carrier and a toner particle that is insoluble in the liquid carrier, the method comprising a step (I) of covalently bonding, to a surface of the toner particle, a compound having a particular substructure.Type: ApplicationFiled: February 19, 2020Publication date: August 27, 2020Inventors: Kouichirou Ochi, Yuzo Tokunaga, Tomoyo Miyakai, Akifumi Matsubara, Takashi Hirasa, Hayato Ida, Yasutaka Akashi