Patents by Inventor Chigusa SATO

Chigusa SATO 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).

  • Patent number: 11034165
    Abstract: An ink jet method includes: a discharging step of discharging a radiation-curable ink jet composition onto a recording medium at an ink weight per dot of 22 ng/dot or less by using an ink jet head having a nozzle density of 600 npi or more and configured to discharge the radiation-curable ink jet composition; and an irradiating step of irradiating, with radiation, the radiation-curable ink jet composition attached to the recording medium. The radiation-curable ink jet composition contains polymerizable compounds containing a monofunctional monomer and a multifunctional monomer. The monofunctional monomer includes a nitrogen-containing monofunctional monomer. The amount of the monofunctional monomer is 90 mass % or more relative to the total amount of the polymerizable compound. The amount of the nitrogen-containing monofunctional monomer is from 1 to 15 mass % relative to the total amount of the polymerizable compounds.
    Type: Grant
    Filed: February 7, 2020
    Date of Patent: June 15, 2021
    Inventors: Chigusa Sato, Midori Sekine, Kyohei Tanaka, Keitaro Nakano
  • Patent number: 11027544
    Abstract: An ink jet method includes: a discharging step of discharging a radiation-curable ink jet composition onto a recording medium at an ink weight per dot of 22 ng/dot or less by using an ink jet head configured to discharge the radiation-curable ink jet composition and having a nozzle density of 600 npi or more; and an irradiating step of irradiating, with radiation, the radiation-curable ink jet composition attached to the recording medium. The radiation-curable ink jet composition contains polymerizable compounds including a monofunctional monomer and a multifunctional monomer. The monofunctional monomer includes a nitrogen-containing monofunctional monomer. The amount of the monofunctional monomer is 90 mass % or more relative to the total amount of the polymerizable compounds. The amount of the nitrogen-containing monofunctional monomer is from 1 to 15 mass % relative to the total amount of the polymerizable compounds.
    Type: Grant
    Filed: February 7, 2020
    Date of Patent: June 8, 2021
    Inventors: Keitaro Nakano, Kyohei Tanaka, Midori Sekine, Chigusa Sato
  • Publication number: 20210047592
    Abstract: There is provided a maintenance liquid, which is used in maintenance of a device equipped with a discharge head for discharging an ultraviolet ray curable-type composition containing the acyl phosphine oxide-based photopolymerization initiator toward an attachment object, including a polymerizable compound in which a saturation solubility of an acyl phosphine oxide-based photopolymerization initiator at 20° C. is equal to or greater than 5.0% by mass.
    Type: Application
    Filed: November 3, 2020
    Publication date: February 18, 2021
    Inventors: Keitaro Nakano, Chigusa Sato, Mitsuaki Yoshizawa
  • Publication number: 20210002499
    Abstract: A radiation curing ink jet printing method for forming a cured coating having a thickness of 0.5 ?m to 5 ?m includes an ejection step of ejecting a radiation-curable ink composition onto a printing medium, and an irradiation step of irradiating the radiation-curable ink composition on the printing medium with an active radiation having an emission peak wavelength in the range of 350 nm to 420 nm from an active radiation source. The radiation-curable ink composition contains one or more monofunctional monomers and one or more multifunctional monomers in such a proportion that the ratio of the total mass of the monofunctional monomers to the total mass of the multifunctional monomers is 0.45 or more. In the irradiation step, the radiation-curable ink composition is irradiated with the active radiation in an atmosphere having an oxygen concentration lower than the atmospheric oxygen concentration.
    Type: Application
    Filed: July 2, 2020
    Publication date: January 7, 2021
    Inventors: Chigusa SATO, Toru SAITO, Keitaro NAKANO
  • Patent number: 10858614
    Abstract: There is provided a maintenance liquid, which is used in maintenance of a device equipped with a discharge head for discharging an ultraviolet ray curable-type composition containing the acyl phosphine oxide-based photopolymerization initiator toward an attachment object, including a polymerizable compound in which a saturation solubility of an acyl phosphine oxide-based photopolymerization initiator at 20° C. is equal to or greater than 5.0% by mass.
    Type: Grant
    Filed: June 11, 2019
    Date of Patent: December 8, 2020
    Assignee: Seiko Epson Corporation
    Inventors: Keitaro Nakano, Chigusa Sato, Mitsuaki Yoshizawa
  • Patent number: 10780500
    Abstract: Provided is a three-dimensional shaped article with relatively high strength and relatively high accuracy. A sintering and shaping method includes: a shaping layer forming process of forming a shaping layer by using a sintering and shaping material in which inorganic particles are included; a process of applying a liquid binding agent, in which a thermoplastic resin and inorganic particles are included, to a desired region of the shaping layer; a process of curing the liquid binding agent, which is applied, to form a shaping cross-sectional layer (shaping portion); a process of removing a region (non-shaping portion) of the shaping layer to which the liquid binding agent is not applied; and a process of heating the shaping cross-sectional layer that is laminated for a sintering treatment.
    Type: Grant
    Filed: December 12, 2018
    Date of Patent: September 22, 2020
    Assignee: Seiko Epson Corporation
    Inventors: Koki Hirata, Shinichi Kato, Hiroshi Fukumoto, Chigusa Sato
  • Publication number: 20200255682
    Abstract: An ink jet method uses a liquid jet head that includes a nozzle for discharging a radiation-curable ink jet composition, a pressure chamber to which the radiation-curable ink jet composition is supplied, and a circulation flow passage allowing the radiation-curable ink jet composition in the pressure chamber to circulate. The method includes discharging the heated radiation-curable ink jet composition by the liquid jet head. The radiation-curable ink jet composition includes a polymerizable compound component including a monofunctional monomer component and a multifunctional monomer component; the content of the monofunctional monomer component is 87 mass % or more based on the total amount of the polymerizable compound component; the weighted average of the glass transition temperatures of homopolymers of the respective polymerizable compounds is 42° C. or more when the mass ratios of the contents of the respective polymerizable compounds are weighted; and the viscosity at 40° C. is 10 mPa·s or more.
    Type: Application
    Filed: February 7, 2020
    Publication date: August 13, 2020
    Inventors: Kyohei TANAKA, Midori SEKINE, Keitaro NAKANO, Chigusa SATO
  • Publication number: 20200254756
    Abstract: An ink jet method includes an ejecting step of ejecting a radiation-curable ink jet composition from an ink jet head and an irradiating step of irradiating the ejected radiation-curable ink jet composition with an ultraviolet ray at an irradiation intensity of 3 to 10 W/cm2 by using a light emitting diode. The radiation-curable ink jet composition contains monofunctional monomers including a nitrogen-containing monofunctional monomer. The amount of the nitrogen-containing monofunctional monomer relative to the total amount of the radiation-curable ink jet composition is 5 to 40 mass %.
    Type: Application
    Filed: February 7, 2020
    Publication date: August 13, 2020
    Inventors: Keitaro NAKANO, Kyohei TANAKA, Midori SEKINE, Chigusa SATO
  • Publication number: 20200254784
    Abstract: An ink jet method includes: a discharging step of discharging a radiation-curable ink jet composition onto a recording medium at an ink weight per dot of 22 ng/dot or less by using an ink jet head having a nozzle density of 600 npi or more and configured to discharge the radiation-curable ink jet composition; and an irradiating step of irradiating, with radiation, the radiation-curable ink jet composition attached to the recording medium. The radiation-curable ink jet composition contains polymerizable compounds containing a monofunctional monomer and a multifunctional monomer. The monofunctional monomer includes a nitrogen-containing monofunctional monomer. The amount of the monofunctional monomer is 90 mass % or more relative to the total amount of the polymerizable compound. The amount of the nitrogen-containing monofunctional monomer is from 1 to 15 mass % relative to the total amount of the polymerizable compounds.
    Type: Application
    Filed: February 7, 2020
    Publication date: August 13, 2020
    Inventors: Chigusa SATO, Midori SEKINE, Kyohei TANAKA, Keitaro NAKANO
  • Publication number: 20200254755
    Abstract: An ink jet method includes: a discharging step of discharging a radiation-curable ink jet composition onto a recording medium at an ink weight per dot of 22 ng/dot or less by using an ink jet head configured to discharge the radiation-curable ink jet composition and having a nozzle density of 600 npi or more; and an irradiating step of irradiating, with radiation, the radiation-curable ink jet composition attached to the recording medium. The radiation-curable ink jet composition contains polymerizable compounds including a monofunctional monomer and a multifunctional monomer. The monofunctional monomer includes a nitrogen-containing monofunctional monomer. The amount of the monofunctional monomer is 90 mass % or more relative to the total amount of the polymerizable compounds. The amount of the nitrogen-containing monofunctional monomer is from 1 to 15 mass % relative to the total amount of the polymerizable compounds.
    Type: Application
    Filed: February 7, 2020
    Publication date: August 13, 2020
    Inventors: Keitaro NAKANO, Kyohei TANAKA, Midori SEKINE, Chigusa SATO
  • Publication number: 20200131291
    Abstract: A three-dimensional modeling composition set includes a model material and a support material. The model material contains a heterocyclic acrylate having oxygen as a heteroatom in the molecule and a first photopolymerization initiator. The support material contains a water-soluble polymerizable compound and a second photopolymerization initiator. The heterocyclic acrylate may be an acrylate having one of a dioxane ring structure and a dioxolane ring structure.
    Type: Application
    Filed: October 30, 2019
    Publication date: April 30, 2020
    Inventors: Chigusa SATO, Koki HIRATA, Shohei NAMIKOSHI, Masaya ISHIDA
  • Publication number: 20190308418
    Abstract: There is provided a maintenance liquid, which is used in maintenance of a device equipped with a discharge head for discharging an ultraviolet ray curable-type composition containing the acyl phosphine oxide-based photopolymerization initiator toward an attachment object, including a polymerizable compound in which a saturation solubility of an acyl phosphine oxide-based photopolymerization initiator at 20° C. is equal to or greater than 5.0% by mass.
    Type: Application
    Filed: June 11, 2019
    Publication date: October 10, 2019
    Applicant: Seiko Epson Corporation
    Inventors: Keitaro Nakano, Chigusa Sato, Mitsuaki Yoshizawa
  • Publication number: 20190291358
    Abstract: A method is provided for producing a three-dimensional object by stacking cured layers of a photocurable color ink composition containing a coloring material. The method includes applying the photocurable color ink composition onto an underlying member; and curing the photocurable color ink composition with light. The content of the coloring material in the photocurable color ink composition is in the range of 0.25% by mass to 2.1% by mass.
    Type: Application
    Filed: March 22, 2019
    Publication date: September 26, 2019
    Inventors: Chigusa SATO, Masashi KUWABARA
  • Patent number: 10322589
    Abstract: A photocurable ink composition includes polymerizable compounds and a photopolymerization initiator. The polymerizable compounds include vinyl ether group-containing (meth)acrylic esters represented by the following Formula (I): CH2?CR1—COOR2—O—CH?CH—R3??(I) (wherein, R1 represents a hydrogen atom or a methyl group; R2 represents a divalent organic residue having 2 to 20 carbon atoms; and R3 represents a hydrogen atom or a monovalent organic residue having 1 to 11 carbon atoms), dipropylene glycol di(meth)acrylate, and monofunctional (meth)acrylate having an aromatic ring skeleton. The ink composition includes a coloring material.
    Type: Grant
    Filed: July 19, 2017
    Date of Patent: June 18, 2019
    Assignee: Seiko Epson Corporation
    Inventors: Keitaro Nakano, Hiroshi Fukumoto, Hiroki Nakane, Hiroaki Kida, Toru Saito, Chigusa Sato
  • Publication number: 20190111487
    Abstract: Provided is a three-dimensional shaped article with relatively high strength and relatively high accuracy. A sintering and shaping method includes: a shaping layer forming process of forming a shaping layer by using a sintering and shaping material in which inorganic particles are included; a process of applying a liquid binding agent, in which a thermoplastic resin and inorganic particles are included, to a desired region of the shaping layer; a process of curing the liquid binding agent, which is applied, to form a shaping cross-sectional layer (shaping portion); a process of removing a region (non-shaping portion) of the shaping layer to which the liquid binding agent is not applied; and a process of heating the shaping cross-sectional layer that is laminated for a sintering treatment.
    Type: Application
    Filed: December 12, 2018
    Publication date: April 18, 2019
    Inventors: Koki HIRATA, Shinichi KATO, Hiroshi FUKUMOTO, Chigusa SATO
  • Patent number: 10183332
    Abstract: Provided is a three-dimensional shaped article with relatively high strength and relatively high accuracy. A sintering and shaping method includes: a shaping layer forming process of forming a shaping layer (5) by using a sintering and shaping material in which inorganic particles (2a) are included; a process of applying a liquid binding agent (8), in which inorganic particles (8a) are included, to a desired region of the shaping layer (5); a process of curing the liquid binding agent (8), which is applied, to form a shaping cross-sectional layer (shaping portion (5a)); a process of removing a region (non-shaping portion (5b)) of the shaping layer (5) to which the liquid binding agent (8) is not applied; and a process of heating the shaping cross-sectional layer that is laminated for a sintering treatment.
    Type: Grant
    Filed: April 20, 2015
    Date of Patent: January 22, 2019
    Assignee: Seiko Epson Corporation
    Inventors: Koki Hirata, Shinichi Kato, Hiroshi Fukumoto, Chigusa Sato
  • Patent number: 9873808
    Abstract: Provided is an ultraviolet-curable ink jet ink composition with excellent curability and storage stability, the composition containing a monomer A represented by Formula (I): CH2?CR1—COOR2—O—CH?CH—R3 (wherein R1 represents a hydrogen atom or a methyl group, R2 represents a C2-C20 divalent organic residue, and R3 represents a hydrogen atom or a C1-C11 monovalent organic residue); a (meth)acrylated amine compound; a hindered amine compound other than the (meth)acrylated amine compound; and a photopolymerization initiator.
    Type: Grant
    Filed: April 17, 2015
    Date of Patent: January 23, 2018
    Assignee: Seiko Epson Corporation
    Inventors: Hiroaki Kida, Chigusa Sato, Hiroyuki Kajimoto, Toru Saito
  • Publication number: 20170321075
    Abstract: A photocurable ink composition includes polymerizable compounds and a photopolymerization initiator. The polymerizable compounds include vinyl ether group-containing (meth)acrylic esters represented by the following Formula (I): CH2?CR1—COOR2—O—CH?CH—R3??(I) (wherein, R1 represents a hydrogen atom or a methyl group; R2 represents a divalent organic residue having 2 to 20 carbon atoms; and R3 represents a hydrogen atom or a monovalent organic residue having 1 to 11 carbon atoms), dipropylene glycol di(meth)acrylate, and monofunctional (meth)acrylate having an aromatic ring skeleton. The ink composition includes a coloring material.
    Type: Application
    Filed: July 19, 2017
    Publication date: November 9, 2017
    Applicant: Seiko Epson Corporation
    Inventors: Keitaro Nakano, Hiroshi Fukumoto, Hiroki Nakane, Hiroaki Kida, Toru Saito, Chigusa Sato
  • Patent number: 9796139
    Abstract: A three-dimensional shaping composition of this invention is a three-dimensional shaping composition which is used for producing a three-dimensionally shaped article by laminating layers and contains particles having a hydrophilic surface and water-soluble monomers having a hydroxyl group. The water-soluble monomer is preferably at least one selected from the group consisting of 4-hydroxybutyl acrylate, 2-hydroxybutyl acrylate, 2-hydroxypropyl acrylate, 2-hydroxyethyl methacrylate, 2-hydroxypropyl methacrylate, and phenol epoxy acrylate.
    Type: Grant
    Filed: October 19, 2015
    Date of Patent: October 24, 2017
    Assignee: Seiko Epson Corporation
    Inventors: Koki Hirata, Shinichi Kato, Hiroshi Fukumoto, Chigusa Sato
  • Patent number: 9765193
    Abstract: There are provided a method of manufacturing a three-dimensional structure, and three-dimension formation composition, by each which a three-dimensional structure can be manufactured with high dimensional accuracy, and provided a three-dimensional structure manufactured with high dimensional accuracy. There is provided a method of manufacturing a three-dimensional structure, in which the three-dimensional structure is manufactured by laminating a layer, the method including: forming the layer using a three-dimension formation composition containing particles, a binding resin, and a water-based solvent; removing the water-based solvent from the layer by heating the layer; and applying a binding solution containing a binder to the layer, in which the binding resin has an ammonium salt of a carboxyl group as a functional group.
    Type: Grant
    Filed: June 30, 2015
    Date of Patent: September 19, 2017
    Assignee: Seiko Epson Corporation
    Inventors: Koki Hirata, Hiroshi Fukumoto, Shinichi Kato, Chigusa Sato