Patents by Inventor Ryotaro KOMADA
Ryotaro KOMADA 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: 20160274479Abstract: An electrostatic latent image developing toner includes a plurality of toner particles each including a core and a shell layer. The shell layer is disposed over a surface of the core. The shell layer is substantially formed by a resin. The shell layer has a surface including a plurality of spot regions and a sheet region that is more hydrophobic than the spot regions. The spot regions each are more chargeable than the sheet region.Type: ApplicationFiled: March 16, 2016Publication date: September 22, 2016Applicant: KYOCERA Document Solutions Inc.Inventors: Masami TSUJIHIRO, Jun HIOKI, Ryotaro KOMADA, Yusuke WASHINO, Haruhiro NISHITERA
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Publication number: 20160252835Abstract: A toner includes a plurality of toner particles each including a toner core and a shell layer disposed over the surface of the toner core. The shell layer includes a thermosetting portion substantially composed of a water-insoluble thermosetting resin and a thermoplastic portion substantially composed of a water-insoluble thermoplastic resin. At least a part of the thermoplastic portion has a shape of a film with projections and recesses and is located on the surface of the toner core. At least a part of the thermosetting portion is located on the thermoplastic portion. The part of the thermosetting portion located on the thermoplastic portion has a shape of a film along the shape of the thermoplastic portion.Type: ApplicationFiled: February 19, 2016Publication date: September 1, 2016Applicant: KYOCERA Document Solutions Inc.Inventors: Ryotaro KOMADA, Masami TSUJIHIRO, Jun HIOKI, Hideharu HORI
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Patent number: 9383670Abstract: A toner includes a plurality of toner particles each having a core and a shell layer on a surface of the core. In a cross section of the toner particle analyzed by EELS, for at least 50% of a circumferential length of the core, the shell layer has one or more portions each satisfying conditions that: a ratio of INc to INs is no less than 0.0 and no greater than 0.2; and a thickness of the shell layer is at least 5 nm. Here, INs indicates an intensity of an N-K shell absorption-edge originating from nitrogen atoms in the shell layer, and INc indicates an intensity of an N-K shell absorption-edge originating from nitrogen atoms in the core. In addition, the longest length among the one or more portions of the shell layer each satisfying the conditions is at least 100 nm.Type: GrantFiled: October 23, 2014Date of Patent: July 5, 2016Assignee: KYOCERA Document Solutions Inc.Inventors: Masami Tsujihiro, Ryotaro Komada
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Patent number: 9329509Abstract: An electrostatic latent image developing toner contains toner particles each including a toner core containing a binder resin, and a shell layer coating the surface of the tore core. The shell layer contains a unit derived from a monomer of a thermosetting resin, and a unit derived from a thermoplastic resin. The resin contained in the shell layer has a unit derived from one or more monomers of thermosetting resins selected from the group of amino resins consisting of a melamine resin, a urea resin, and a glyoxal resin.Type: GrantFiled: June 26, 2014Date of Patent: May 3, 2016Assignee: KYOCERA Document Solutions Inc.Inventors: Yoshio Ozawa, Naruo Yabe, Masami Tsujihiro, Ryotaro Komada
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Patent number: 9304426Abstract: The present disclosure relates to an electrostatic latent image developing toner containing a toner particle including a toner core containing a binder resin and a shell layer coating a surface of the toner core. The shell layer contains a unit derived from a monomer of a thermosetting resin, and a unit derived from a thermoplastic resin. The thermosetting resin is one or more resins selected from the group of amino resins consisting of a melamine resin, a urea resin, and a glyoxal resin. The toner particle contains fine particles in an interfacial portion between the toner core and the shell layer, and the fine particles have a charge property opposite to that of the toner, or have a volume resistivity lower than both a volume resistivity of the binder resin and a volume resistivity of the shell layer.Type: GrantFiled: June 26, 2014Date of Patent: April 5, 2016Assignee: KYOCERA Document Solutions Inc.Inventors: Yoshio Ozawa, Masami Tsujihiro, Toru Takatsuna, Ryotaro Komada
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Patent number: 9250551Abstract: An electrostatic latent image developing toner is manufactured by mixing an aqueous medium dispersion liquid (X) containing negatively chargeable toner cores and an aqueous medium dispersion liquid (Y) containing positively chargeable resin particulates, followed by stirring the mixture liquid to form shell layers each on a surface of the toner cores with the resin particulates. The shell layers are formed with the resin particulates subjected to a stirring treatment together with an anionic surfactant.Type: GrantFiled: March 28, 2014Date of Patent: February 2, 2016Assignee: KYOCERA Document Solutions Inc.Inventors: Seishi Ojima, Ryotaro Komada
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Patent number: 9176404Abstract: Regarding a method for manufacturing an electrostatic latent image developing toner, which includes a process for aggregating particulates of components such as a binder resin, a colorant, and a releasing agent, a dispersion solution of binder resin particulates obtained by a specific method is used. The dispersion solution of the binder resin particulates are prepared as an oil-in-water emulsion containing particulates including the binder resin by mixing the binder resin, which is polyester resin, in a molten state with an organic base in a liquid state so as to neutralize the binder resin and subsequently mixing a resin molten solution with water. The amount of use of the organic base is 6 parts by mass or more with respect to 100 parts by mass of the binder resin. The degree of neutralization of the binder resin neutralized by the organic base is 100% or more.Type: GrantFiled: December 10, 2013Date of Patent: November 3, 2015Assignee: KYOCERA Document Solutions Inc.Inventor: Ryotaro Komada
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Publication number: 20150118615Abstract: A toner includes a plurality of toner particles each having a core and a shell layer on a surface of the core. In a cross section of the toner particle analyzed by EELS, for at least 50% of a circumferential length of the core, the shell layer has one or more portions each satisfying conditions that: a ratio of INc to INs is no less than 0.0 and no greater than 0.2; and a thickness of the shell layer is at least 5 nm. Here, INs indicates an intensity of an N-K shell absorption-edge originating from nitrogen atoms in the shell layer, and INc indicates an intensity of an N-K shell absorption-edge originating from nitrogen atoms in the core. In addition, the longest length among the one or more portions of the shell layer each satisfying the conditions is at least 100 nm.Type: ApplicationFiled: October 23, 2014Publication date: April 30, 2015Applicant: KYOCERA Document Solutions Inc.Inventors: Masami TSUJIHIRO, Ryotaro KOMADA
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Publication number: 20150099221Abstract: For at least 80% of toner particles in a toner, along at least 80% of circumferential length of a toner particle cross-section, a shell layer has a thickness of at least 5 nm and satisfies a condition that a ratio of an intensity INc relative to an intensity INs is no greater than 0.2. For at least 80% of the toner particles in the toner, along at least 80% of the circumferential length of the toner particle cross-section, the shell layer has a thickness of at least 5 nm and satisfies a condition that a ratio of an intensity ISc relative to an intensity ISs is no greater than 0.2.Type: ApplicationFiled: October 3, 2014Publication date: April 9, 2015Applicant: KYOCERA DOCUMENT SOLUTIONS INC.Inventors: Masami TSUJIHIRO, Ryotaro KOMADA
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Publication number: 20150004537Abstract: The present disclosure relates to an electrostatic latent image developing toner containing a toner particle including a toner core containing a binder resin and a shell layer coating a surface of the toner core. The shell layer contains a unit derived from a monomer of a thermosetting resin, and a unit derived from a thermoplastic resin. The thermosetting resin is one or more resins selected from the group of amino resins consisting of a melamine resin, a urea resin, and a glyoxal resin. The toner particle contains fine particles in an interfacial portion between the toner core and the shell layer, and the fine particles have a charge property opposite to that of the toner, or have a volume resistivity lower than both a volume resistivity of the binder resin and a volume resistivity of the shell layer.Type: ApplicationFiled: June 26, 2014Publication date: January 1, 2015Applicant: KYOCERA Document Solutions Inc.Inventors: Yoshio OZAWA, Masami TSUJIHIRO, Toru TAKATSUNA, Ryotaro KOMADA
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Publication number: 20150004540Abstract: An electrostatic latent image developing toner contains toner particles each including a toner core containing a binder resin, and a shell layer coating the surface of the tore core. The shell layer contains a unit derived from a monomer of a thermosetting resin, and a unit derived from a thermoplastic resin. The resin contained in the shell layer has a unit derived from one or more monomers of thermosetting resins selected from the group of amino resins consisting of a melamine resin, a urea resin, and a glyoxal resin.Type: ApplicationFiled: June 26, 2014Publication date: January 1, 2015Applicant: KYOCERA DOCUMENT SOLUTIONS INC.Inventors: Yoshio OZAWA, Naruo YABE, Masami TSUJIHIRO, Ryotaro KOMADA
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Publication number: 20140295345Abstract: An electrostatic latent image developing toner is manufactured by mixing an aqueous medium dispersion liquid (X) containing negatively chargeable toner cores and an aqueous medium dispersion liquid (Y) containing positively chargeable resin particulates, followed by stirring the mixture liquid to form shell layers each on a surface of the toner cores with the resin particulates. The shell layers are formed with the resin particulates subjected to a stirring treatment together with an anionic surfactant.Type: ApplicationFiled: March 28, 2014Publication date: October 2, 2014Applicant: KYOCERA Document Solutions Inc.Inventors: Seishi OJIMA, Ryotaro KOMADA
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Publication number: 20140170559Abstract: Regarding a method for manufacturing an electrostatic latent image developing toner, which includes a process for aggregating particulates of components such as a binder resin, a colorant, and a releasing agent, a dispersion solution of binder resin particulates obtained by a specific method is used. The dispersion solution of the binder resin particulates are prepared as an oil-in-water emulsion containing particulates including the binder resin by mixing the binder resin, which is polyester resin, in a molten state with an organic base in a liquid state so as to neutralize the binder resin and subsequently mixing a resin molten solution with water. The amount of use of the organic base is 6 parts by mass or more with respect to 100 parts by mass of the binder resin. The degree of neutralization of the binder resin neutralized by the organic base is 100% or more.Type: ApplicationFiled: December 10, 2013Publication date: June 19, 2014Applicant: KYOCERA DOCUMENT SOLUTIONS INC.Inventor: Ryotaro KOMADA