Patents by Inventor Masami Tsujihiro
Masami Tsujihiro 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: 9740127Abstract: 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: GrantFiled: February 19, 2016Date of Patent: August 22, 2017Assignee: KYOCERA Document Solutions Inc.Inventors: Ryotaro Komada, Masami Tsujihiro, Jun Hioki, Hideharu Hori
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Patent number: 9651885Abstract: An electrostatic latent image developing toner includes toner particles that each include a toner core and a shell layer disposed over a surface of the toner core. The shell layer contains a hydrophobic thermoplastic resin and a hydrophilic thermosetting resin. The hydrophobic thermoplastic resin is contained in an amount of no less than 0.2% by mass and no greater than 4.7% by mass relative to mass of the toner particles. The hydrophilic thermosetting resin is contained in an amount of no less than 0.01% by mass and no greater than 0.71% by mass relative to mass of the toner particles. The hydrophobic thermoplastic resin is exposed at a surface of each of the toner particles.Type: GrantFiled: February 17, 2016Date of Patent: May 16, 2017Assignee: KYOCERA Document Solutions Inc.Inventors: Ryota Kobayashi, Masami Tsujihiro, Jun Hioki, Yusuke Washino
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Publication number: 20170090315Abstract: An electrostatic latent image developing toner includes toner particles each including a toner core and a shell layer. The shell layer includes first and second domains. The first domain includes a first copolymer of a first main monomer having a mole fraction of at least 20 mol % and one or more first additional monomers each having a mole fraction of less than 20 mol %. The second domain includes a second copolymer of a second main monomer having a mole fraction of at least 20 mol % and one or more second additional monomers each having a mole fraction of less than 20 mol %. A difference in polymer SP value between the first and second main monomers is at least 0.5 and no greater than 5.0. The first and second additional monomers each include one or more common monomers having a homopolymerization glass transition point of no greater than ?20° C.Type: ApplicationFiled: September 28, 2016Publication date: March 30, 2017Applicant: KYOCERA Document Solutions Inc.Inventor: Masami TSUJIHIRO
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Patent number: 9523937Abstract: An electrostatic latent image developing toner includes toner particles that each include a toner core and a shell layer disposed over a surface of the toner core. The shell layer contains a first shell resin and a second shell resin. The first shell resin is a hydrophilic thermoplastic resin, a hydrophobic thermoplastic resin, or a hydrophobic thermosetting resin. The second shell resin is a hydrophilic thermosetting resin. The first shell resin includes a repeating unit having an alcoholic hydroxyl group.Type: GrantFiled: December 22, 2015Date of Patent: December 20, 2016Assignee: KYOCERA Document Solutions Inc.Inventors: Masami Tsujihiro, Ryota Kobayashi, Hideharu Hori, Yusuke Washino
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Patent number: 9500973Abstract: 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: GrantFiled: October 3, 2014Date of Patent: November 22, 2016Assignee: KYOCERA Document Solutions Inc.Inventors: Masami Tsujihiro, Ryotaro Komada
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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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Publication number: 20160246201Abstract: An electrostatic latent image developing toner includes toner particles that each include a toner core and a shell layer disposed over a surface of the toner core. The shell layer contains a hydrophobic thermoplastic resin and a hydrophilic thermosetting resin. The hydrophobic thermoplastic resin is contained in an amount of no less than 0.2% by mass and no greater than 4.7% by mass relative to mass of the toner particles. The hydrophilic thermosetting resin is contained in an amount of no less than 0.01% by mass and no greater than 0.71% by mass relative to mass of the toner particles. The hydrophobic thermoplastic resin is exposed at a surface of each of the toner particles.Type: ApplicationFiled: February 17, 2016Publication date: August 25, 2016Applicant: KYOCERA Document Solutions Inc.Inventors: Ryota KOBAYASHI, Masami TSUJIHIRO, Jun HIOKI, Yusuke WASHINO
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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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Publication number: 20160187796Abstract: An electrostatic latent image developing toner includes toner particles that each include a toner core and a shell layer disposed over a surface of the toner core. The shell layer contains a first shell resin and a second shell resin. The first shell resin is a hydrophilic thermoplastic resin, a hydrophobic thermoplastic resin, or a hydrophobic thermosetting resin. The second shell resin is a hydrophilic thermosetting resin. The first shell resin includes a repeating unit having an alcoholic hydroxyl group.Type: ApplicationFiled: December 22, 2015Publication date: June 30, 2016Applicant: KYOCERA Document Solutions Inc.Inventors: Masami TSUJIHIRO, Ryota KOBAYASHI, Hideharu HORI, Yusuke WASHINO
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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: 9329513Abstract: A positively chargeable toner includes a plurality of toner particles each having a toner mother particle and an external additive adhering to a surface of the toner mother particle. The external additive contains silica particles and coat layers on a surface of the respective silica particles. The coat layers contain a mixture of a nitrogen-containing resin and a chargeable treatment agent.Type: GrantFiled: November 21, 2014Date of Patent: May 3, 2016Assignee: KYOCERA Document Solutions Inc.Inventors: Ryota Kobayashi, Masami Tsujihiro
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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: 9158218Abstract: An electrostatic latent image developing toner includes toner base particles including a binder resin and an external additive attached to surfaces of the toner base particles. The external additive contains silica covered with a coating layer containing a nitrogen containing resin.Type: GrantFiled: October 24, 2013Date of Patent: October 13, 2015Assignee: KYOCERA Document Solutions Inc.Inventors: Masami Tsujihiro, Yoshio Ozawa
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Publication number: 20150177633Abstract: A toner includes toner particles. The toner particles each include a toner core, silica particles located on a surface of the toner core, and a shell layer disposed over the surface of the toner core on which the silica particles are located. For at least 80% by number of the toner particles, along at least 80% of a circumferential length of a cross-section of the toner particle when the cross-section is analyzed by EELS, the 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 at least 0.0 and no greater than 0.2. The intensity INs indicates intensity of an N—K shell absorption-edge originating from nitrogen atoms in the shell layer. The intensity INc indicates intensity of an N—K shell absorption-edge originating from nitrogen atoms in the toner core.Type: ApplicationFiled: December 16, 2014Publication date: June 25, 2015Applicant: KYOCERA Document Solutions Inc.Inventors: Ryota KOBAYASHI, Masami TSUJIHIRO
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Publication number: 20150153664Abstract: A positively chargeable toner includes a plurality of toner particles each having a toner mother particle and an external additive adhering to a surface of the toner mother particle. The external additive contains silica particles and coat layers on a surface of the respective silica particles. The coat layers contain a mixture of a nitrogen-containing resin and a chargeable treatment agent.Type: ApplicationFiled: November 21, 2014Publication date: June 4, 2015Applicant: KYOCERA Document Solutions Inc.Inventors: Ryota KOBAYASHI, Masami TSUJIHIRO
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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: 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: 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