Patents by Inventor Yosuke Tsurumi

Yosuke Tsurumi 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).

  • Publication number: 20230314977
    Abstract: A carrier for electrostatic image development includes: a core material; and a resin coating layer that contains nitrogen-containing silica particles and nitrogen-containing resin fine particles and covers the core material. The content of the nitrogen-containing silica particles is from 10% by mass to 55% by mass inclusive based on the total mass of the resin coating layer. The nitrogen-containing resin fine particles have a volume average particle diameter of from 100 nm to 250 nm inclusive. The mass ratio P/S of the mass P of the nitrogen-containing resin fine particles to the mass S of the nitrogen-containing silica particles is from 0.15 to 0.55 inclusive.
    Type: Application
    Filed: November 11, 2022
    Publication date: October 5, 2023
    Applicant: FUJIFILM Business Innovation Corp.
    Inventors: Karin SAKAI, Kazutsuna SASAKI, Yosuke TSURUMI, Yasuo KADOKURA, Takuro WATANABE
  • Publication number: 20230314975
    Abstract: An electrostatic charge image developer contains toner particles, silica particles that are added to an exterior of the toner particles and contain a nitrogen element-containing compound, and a carrier that has a core material and a nitrogen element-containing coating resin layer, in which a content of the nitrogen element-containing compound with respect to the silica particles is 0.005% by mass or more and 0.5% by mass or less in terms of a nitrogen element, and in a case where A represents a pore volume of pores that the silica particles include and have a diameter of 1 nm or more and 50 nm or less, which is determined from a pore size distribution curve obtained by a nitrogen adsorption method before baking of the silica particles at 350° C.
    Type: Application
    Filed: January 16, 2023
    Publication date: October 5, 2023
    Applicant: FUJIFILM Business Innovation Corp.
    Inventors: Takuro WATANABE, Yosuke TSURUMI, Yasuo KADOKURA, Karin SAKAI
  • Publication number: 20230305417
    Abstract: An electrostatic charge image developing toner contains toner particles, silica particles (A) that are added to an exterior of the toner particles and contain a nitrogen element-containing compound containing a molybdenum element, and inorganic particles (B) that are added to the exterior of the toner particles and other than the silica particles (A), in which in the silica particles (A), a ratio NMo/NSi of Net intensity NMo of the molybdenum element measured by X-ray fluorescence analysis to Net intensity NSi of a silicon element measured by X-ray fluorescence analysis is 0.035 or more and 0.45 or less, and an average primary particle size of the inorganic particles (B) is 10 nm or more and 80 nm or less.
    Type: Application
    Filed: January 17, 2023
    Publication date: September 28, 2023
    Applicant: FUJIFILM Business Innovation Corp.
    Inventors: Yasuko TORII, Yosuke TSURUMI, Soichiro ARAI
  • Publication number: 20230305418
    Abstract: An electrostatic charge image developing toner contains negatively charged toner particles and silica particles added to an exterior of the toner particles, in which in a case where the silica particles are sorted into silica particles (S1) having a circularity of 0.91 or more and silica particles (S2) having a circularity less than 0.91, a mass ratio N/Si of a nitrogen element to a silicon element in a group of the silica particles (S1) is 0.005 or more and 0.50 or less, a mass ratio N/Si of a nitrogen element to a silicon element in a group of the silica particles (S2) is less than 0.005, and an average circularity of the silica particles (S2) is 0.84 or more and less than 0.91.
    Type: Application
    Filed: January 17, 2023
    Publication date: September 28, 2023
    Applicant: FUJIFILM Business Innovation Corp
    Inventors: Ryo NAGAI, Yosuke TSURUMI, Yasuko TORII
  • Publication number: 20230168598
    Abstract: An electrostatic charge image developing toner contains toner particles, titanic acid compound particles that are added to an exterior of the toner particles, have a peak existing in a range of 20 nm or more and less than 80 nm in a number-based primary particle size distribution curve, and have an average circularity of 0.88 or more and 0.
    Type: Application
    Filed: September 20, 2022
    Publication date: June 1, 2023
    Applicant: FUJIFILM Business Innovation Corp.
    Inventors: Moegi IGUCHI, Sakon TAKAHASHI, Yosuke TSURUMI, Yasuaki HASHIMOTO, Ryo OTAKE, Ryo NAGAI
  • Publication number: 20230099642
    Abstract: A toner for developing an electrostatic charge image contains toner particles having an average circularity Cc of 0.98 or more; and external additives including monodisperse silica particles having an average diameter of primary particles of 20 nm or more and 70 nm or less and titanate particles having an average diameter of primary particles of 20 nm or more and 70 nm or less, wherein the absolute difference between the average diameter of primary particles of the monodisperse silica particles and the average diameter of primary particles of the titanate particles is 25 nm or less.
    Type: Application
    Filed: January 26, 2022
    Publication date: March 30, 2023
    Applicant: FUJIFILM Business Innovation Corp.
    Inventors: Moegi Iguchi, Sakon Takahashi, Yosuke Tsurumi, Yasuaki Hashimoto, Ryo Otake
  • Publication number: 20230101891
    Abstract: An electrostatic charge image developing toner includes toner particles, and an external additive that contains particles A containing a perovskite-type compound and having an equivalent circle diameter of 15 nm or greater and 90 nm or less and particles B containing a perovskite-type compound and having an equivalent circle diameter of 1.0 ?m or greater and 3.0 ?m or less, in which the particles B occupy 0.3% by number or greater and 3.5% by number or less of an entirety of the toner particles.
    Type: Application
    Filed: February 7, 2022
    Publication date: March 30, 2023
    Applicant: FUJIFILM Business Innovation Corp.
    Inventors: Yosuke TSURUMI, Yasuaki HASHIMOTO
  • Publication number: 20230097500
    Abstract: An electrostatic charge image developing toner contains toner particles, silica particles that are added to an exterior of the toner particles, and titanic acid compound particles that are added to the exterior of the toner particles and have an average circularity of 0.890 or more and 0.950 or less, in which the silica particles include particles having a primary particle size of 80 nm or less, the particles having a primary particle size of 80 nm or less have at least one peak in a range of 20 nm or more and less than 80 nm in a number-based primary particle size distribution curve (hereinafter, silica particles having such a peak will be called “specific silica particles”), the titanic acid compound particles have at least one peak in a range of 20 nm or more and less than 80 nm in a number-based primary particle size distribution curve, a difference between an average circularity of the specific silica particles and the average circularity of the titanic acid compound particles is 0.
    Type: Application
    Filed: September 22, 2022
    Publication date: March 30, 2023
    Applicant: FUJIFILM Business Innovation Corp.
    Inventors: Ryo NAGAI, Sakon TAKAHASHI, Yasuaki HASHIMOTO, Moegi IGUCHI, Yosuke TSURUMI, Ryo OTAKE
  • Publication number: 20230102175
    Abstract: A toner for developing an electrostatic charge image includes toner particles having an average circularity Cc of 0.80 or more and less than 0.98, and an external additive containing monodisperse silica particles and titanate compound particles, in which a ratio Rt/Rs of an average primary particle diameter Rt of the titanate compound particles to an average primary particle diameter Rs of the monodisperse silica particles is 0.50 or more and 3.50 or less, and a ratio A/B of an external additive coverage A (%) of the monodisperse silica particles on surfaces of the toner particles to an external additive coverage B (%) of the titanate compound particles on the surfaces of the toner particles satisfies formula (1): 0<A/B?2.00.
    Type: Application
    Filed: February 3, 2022
    Publication date: March 30, 2023
    Applicant: FUJIFILM Business Innovation Corp.
    Inventors: Ryo OTAKE, Sakon TAKAHASHI, Yosuke TSURUMI, Moegi IGUCHI, Yasuaki HASHIMOTO
  • Patent number: 11556071
    Abstract: An electrostatic charge image developing carrier includes a magnetic particle and a coating resin layer that covers the magnetic particle, and an amount of the coating resin layer that is peeled off from the magnetic particle when the carrier dispersed in water is irradiated with ultrasonic waves, relative to a coating amount of the coating resin layer before ultrasonic irradiation, is 800 mass ppm or more and 2,000 mass ppm or less, and a difference between an initial coating amount of the coating resin layer of a carrier having no travel history and a coating amount of the coating resin layer of a carrier having a travel history and being taken out from an electrostatic charge image developer, relative to the initial coating amount of the coating resin layer, is 0 mass ppm or more and 3,000 mass ppm or less.
    Type: Grant
    Filed: August 9, 2021
    Date of Patent: January 17, 2023
    Assignee: FUJIFILM Business Innovation Corp.
    Inventors: Takuro Watanabe, Kazutsuna Sasaki, Yosuke Tsurumi, Yasuo Kadokura, Karin Sakai
  • Patent number: 11550235
    Abstract: An electrostatic image developing toner includes toner particles, an external additive A, and an external additive B. At least the external additive A is deposited on the surfaces of the toner particles. At least the external additive B is deposited on the external additive A. The external additive B includes an aggregate of two or more particles. The coverage of the toner particles with the external additive B is 3% by area or more with respect to the total surface area of the toner particles.
    Type: Grant
    Filed: July 30, 2020
    Date of Patent: January 10, 2023
    Assignee: FUJIFILM Business Innovation Corp.
    Inventors: Atsushi Sugawara, Yosuke Tsurumi, Yasuko Torii, Yoshimasa Fujihara, Moegi Iguchi
  • Patent number: 11531284
    Abstract: An electrostatic image developing toner includes toner particles including a binder resin and a release agent, an external additive A, and an external additive B. At least the external additive A is present on the surface of the toner particles. At least the external additive B is present on the external additive A. The external additive B is an aggregate of two or more particles. The toner particles have an average circularity of 0.8 or more and 0.94 or less. The amount of the release agent present at the surface of the toner particles is 5 area % or more and 30 area % or less based on the total surface area of the toner particles.
    Type: Grant
    Filed: July 28, 2020
    Date of Patent: December 20, 2022
    Assignee: FUJIFILM Business Innovation Corp.
    Inventors: Moegi Iguchi, Yosuke Tsurumi, Atsushi Sugawara, Yoshimasa Fujihara, Yasuko Torii
  • Publication number: 20220390875
    Abstract: A carrier for developing an electrostatic image includes a magnetic particle and a resin layer with which the magnetic particle is coated and which contains silica particles having an average particle diameter of 50 nm or more and 200 nm or less. In the carrier, a silicon element ratio Si1 in a region in which a distance from a surface of the resin layer in a direction toward an inside is 0.1 ?m or more and 0.2 ?m or less and a silicon element ratio Si2 in a region in which a distance from a surface of the magnetic particle in a direction toward the surface of the resin layer is 0.0 ?m or more and 0.1 ?m or less satisfy formula 1-1 and formula 2-1 below. 0.
    Type: Application
    Filed: October 8, 2021
    Publication date: December 8, 2022
    Applicant: FUJIFILM Business Innovation Corp.
    Inventors: Shintaro ANNO, Yosuke Tsurumi, Takeshi Tanabe
  • Publication number: 20220373920
    Abstract: An electrostatic image developing carrier includes core particles provided by dispersing a magnetic powder in a resin and resin cover layers covering the core particles, wherein the resin cover layers have a surface coverage of 96 area % or more, the resin cover layers include 10 mass % or more and 50 mass % or less of inorganic particles relative to a total mass of the resin cover layers, and the inorganic particles in surfaces of the carrier have a surface exposure ratio of 6 atomic % or more and 15 atomic % or less determined by X-ray photoelectron spectroscopy.
    Type: Application
    Filed: August 23, 2021
    Publication date: November 24, 2022
    Applicant: FUJIFILM Business Innovation Corp.
    Inventors: Takuro WATANABE, Kazutsuna SASAKI, Yosuke TSURUMI, Yasuo KADOKURA, Karin SAKAI
  • Publication number: 20220373924
    Abstract: An electrostatic image developer includes a toner including toner particles and an external additive, wherein an amount of the external additive that is loose relative to a total mass of the external additive is 5 mass % or less, and a carrier including magnetic particles and resin cover layers covering the magnetic particles and including inorganic particles, wherein a fine-irregularity-structure surface roughness of surfaces three-dimensionally analyzed has, in an analysis region, a ratio B/A of an irregularity-surface area B to a plan-view area A of 1.020 or more and 1.100 or less.
    Type: Application
    Filed: September 3, 2021
    Publication date: November 24, 2022
    Applicant: FUJIFILM Business Innovation Corp.
    Inventors: Sakiko TAKEUCHI, Yasuo KADOKURA, Yosuke TSURUMI, Kazutsuna SASAKI, Takuro WATANABE, Karin SAKAI
  • Publication number: 20220373922
    Abstract: An electrostatic charge image developer contains: a toner containing a toner particle and an external additive; and a carrier containing a magnetic particle and a resin layer covering the magnetic particle; and the toner particle has a surface property index value of 1.0 or more and less than 2.0; and the carrier has a surface having a ratio B/A of a surface area B to a plane view area A of 1.020 or more and 1.100 or less, the plane view area A and the surface area B being obtained by three-dimensional analysis of the surface of the carrier.
    Type: Application
    Filed: August 11, 2021
    Publication date: November 24, 2022
    Applicant: FUJIFILM Business Innovation Corp.
    Inventors: Karin SAKAI, Kazutsuna SASAKI, Yosuke TSURUMI, Yasuo KADOKURA, Takuro WATANABE
  • Publication number: 20220373923
    Abstract: An electrostatic charge image developer containing: a toner containing a toner particle and an external additive; and a carrier containing a magnetic particle and a resin layer covering the magnetic particle, in which the toner particle has a surface property index value of 2.0 or more and 2.8 or less; and the carrier has a surface having a ratio BIA of a surface area B to a planar view area A of 1.020 or more and 1.100 or less, the planar view area A and the surface area B being obtained by three-dimensional analysis of the surface of the carrier.
    Type: Application
    Filed: August 17, 2021
    Publication date: November 24, 2022
    Applicant: FUJIFILM Business Innovation Corp.
    Inventors: Yasuo KADOKURA, Takuro WATANABE, Karin SAKAI, Kazutsuna SASAKI, Yosuke TSURUMI
  • Publication number: 20220308493
    Abstract: An electrostatic charge image developing carrier includes a magnetic particle and a coating resin layer that covers the magnetic particle, and an amount of the coating resin layer that is peeled off from the magnetic particle when the carrier dispersed in water is irradiated with ultrasonic waves, relative to a coating amount of the coating resin layer before ultrasonic irradiation, is 800 mass ppm or more and 2,000 mass ppm or less, and a difference between an initial coating amount of the coating resin layer of a carrier having no travel history and a coating amount of the coating resin layer of a carrier having a travel history and being taken out from an electrostatic charge image developer, relative to the initial coating amount of the coating resin layer, is 0 mass ppm or more and 3,000 mass ppm or less.
    Type: Application
    Filed: August 9, 2021
    Publication date: September 29, 2022
    Applicant: FUJIFILM Business Innovation Corp.
    Inventors: Takuro Watanabe, Kazutsuna Sasaki, Yosuke Tsurumi, Yasuo Kadokura, Karin Sakai
  • Publication number: 20220308492
    Abstract: An electrostatic charge image developing carrier, contains: a magnetic particle; and a coating resin layer coating the magnetic particle and containing inorganic particles, in which an area ratio of the inorganic particles that is a ratio of a total area of the inorganic particles to an area of the coating resin layer in a cut surface of the coating resin layer along a thickness direction of the coating resin layer is 10% or more and 50% or less.
    Type: Application
    Filed: July 27, 2021
    Publication date: September 29, 2022
    Applicant: FUJIFILM Business Innovation Corp.
    Inventors: Yasuo KADOKURA, Yosuke TSURUMI, Takuro WATANABE, Kazutsuna SASAKI, Karin SAKAI
  • Publication number: 20220308490
    Abstract: A method for producing a recycled carrier includes: performing classification, the classification including separating a carrier having a coating layer from a collected developer by a centrifugal air classifier, the collected developer containing the carrier and being obtained by collecting an electrostatic charge image developer remaining after image formation; and performing recoating, the recoating including dissolving or thermally melting a coating resin of the separated and classified carrier and then coating the resulting carrier again to produce a recycled carrier.
    Type: Application
    Filed: August 27, 2021
    Publication date: September 29, 2022
    Applicant: FUJIFILM Business Innovation Corp.
    Inventors: Takeshi TANABE, Yosuke TSURUMI, Shintaro ANNO