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公开(公告)号：US12181834B2
公开(公告)日：2024-12-31
申请号：US17497137
申请日：2021-10-08
Applicant: FUJIFILM Business Innovation Corp.
Inventor： Yukiaki Nakamura , Kana Nagashima
Abstract: An electrostatic image developing toner set includes a brilliant toner having brilliant toner particles that include a binder resin and a brilliant pigment, and a color toner having color toner particles that include a binder resin and a colorant other than the brilliant pigment. The binder resin included in the brilliant toner particles and the binder resin included in the color toner particles are incompatible with each other.
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公开(公告)号：US12157813B2
公开(公告)日：2024-12-03
申请号：US16919066
申请日：2020-07-01
Applicant: FUJIFILM Business Innovation Corp.
Inventor： Yukiaki Nakamura , Masaru Takahashi , Tomoaki Tanaka , Satomi Hara , Ryutaro Kembo
Abstract: A resin particle includes a fluorescent colorant and a binder resin. The fluorescent colorant is bound to the binder resin by a chemical bond.
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公开(公告)号：US11965043B2
公开(公告)日：2024-04-23
申请号：US16921885
申请日：2020-07-06
Applicant: FUJIFILM Business Innovation Corp.
Inventor： Ryutaro Kembo , Masaru Takahashi , Yukiaki Nakamura , Tomoaki Tanaka , Satomi Hara
IPC: C08G65/34 , C08F12/08 , C08G63/672 , C08K5/32 , C08K5/3437
CPC classification number: C08F12/08 , C08G63/672 , C08G65/34 , C08K5/32 , C08K5/3437
Abstract: A resin particle includes a fluorescent colorant and a color pigment. A hue angle of the resin particle and a hue angle of the fluorescent colorant are different from each other. When a fluorescence peak wavelength in a spectral reflectance of the fluorescent colorant is represented by A (nm), an integrated value of a spectral reflectance (%) of the color pigment in a wavelength range of from A−30 (nm) to A+30 (nm) is 2,500 or more.
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4.发明授权公开(公告)号：US12025950B2
公开(公告)日：2024-07-02
申请号：US16985688
申请日：2020-08-05
Applicant: FUJIFILM BUSINESS INNOVATION CORP.
Inventor： Daisuke Tomita , Takahiro Yamashita , Yukiaki Nakamura , Takahisa Tatekawa , Masaru Takahashi
CPC classification number: G03G9/08755 , G03G9/0804 , G03G9/0819 , G03G9/0904
Abstract: A resin fine particle includes a polyester resin; and a basic dye, in which a volume average particle diameter of the resin fine particle is 0.05 μm or more and 1 μm or less, and a ratio of a concentration of the basic dye in a center of gravity portion of the resin fine particle to a concentration of the basic dye in a surface layer portion having a depth of 10 nm or less from a surface of the resin fine particle is 0.8 or more.
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Patent Agency Ranking
公开(公告)号：US11693339B2
公开(公告)日：2023-07-04
申请号：US17397232
申请日：2021-08-09
Applicant: FUJIFILM Business Innovation Corp.
Inventor： Masato Ono , Masayuki Seko , Tomoaki Tanaka , Yukiaki Nakamura , Ryutaro Kembo
CPC classification number: G03G15/1605 , G03G15/162 , G03G15/6585
Abstract: A unit includes: a developing device configured to develop an electrostatic charge image that is formed on a surface of an image carrier, as a toner image with a developer including a flat toner containing a flat pigment, the developer being accommodated in the developing device; and a transfer device including an intermediate transfer belt onto which the toner image formed on the surface of the image carrier is primarily transferred, a primary transfer device configured to primarily transfer the toner image formed on the surface of the image carrier to a surface of the intermediate transfer belt, and a secondary transfer device configured to secondarily transfer the toner image on the surface of the intermediate transfer belt to a surface of a recording medium, wherein the intermediate transfer belt contains a resin and conductive carbon particles, and after the flat toner adheres to an outer circumferential surface of the intermediate transfer belt in a loading amount of 3 g/cm2, in a case where air is blown to the outer circumferential surface from an upper side of the outer circumferential surface while increasing a blowing pressure, all the flat toner adhering to the outer circumferential surface is separated from the outer circumferential surface at a blowing pressure of 25 kPa or less.
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公开(公告)号：US12197169B2
公开(公告)日：2025-01-14
申请号：US17404729
申请日：2021-08-17
Applicant: FUJIFILM Business Innovation Corp.
Inventor： Yukiaki Nakamura , Daisuke Noguchi , Masaru Takahashi , Kazuhiko Nakamura
Abstract: An electrostatic charge image developing toner includes a toner particle, and the toner particle includes: a core particle containing a large-diameter particle having a number average particle diameter of 1 μm or more; and a shell layer that includes at least two resin layers each containing an amorphous resin and covers a surface of the core particles, and an outermost layer of the at least two resin layers is a resin layer being made of the amorphous resin.
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7.发明授权公开(公告)号：US12130586B2
公开(公告)日：2024-10-29
申请号：US17874745
申请日：2022-07-27
Applicant: FUJIFILM Business Innovation Corp.
Inventor： Daisuke Tomita , Takahiro Yamashita , Yukiaki Nakamura , Takahisa Tatekawa , Masaru Takahashi
CPC classification number: G03G9/08755 , G03G9/0804 , G03G9/0819 , G03G9/0904
Abstract: A method for producing a resin fine particle includes dissolving or melting an oily mixture containing at least a polyester resin, a base, and a basic dye while applying a shearing force to the oily mixture, and emulsifying the dissolved or molten oily mixture by adding a surfactant and an aqueous medium while applying a shearing force to the dissolved or molten oily mixture to prepare a dispersion liquid of the resin fine particle. The resin fine particle includes the polyester resin and the basic dye, has a volume average particle diameter of 0.05 μm or more and 1 μm or less, and has a ratio of a concentration of the basic dye in a center of gravity portion of the resin fine particle to a concentration of the basic dye in a surface layer portion having a depth of 10 nm or less from a surface of the resin fine particle of 0.8 or more.
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公开(公告)号：US20230324820A1
公开(公告)日：2023-10-12
申请号：US17943761
申请日：2022-09-13
Applicant: FUJIFILM Business Innovation Corp.
Inventor： Yoshimasa FUJIHARA , Yukiaki Nakamura , Takahiro Yamashita
IPC: G03G9/08
CPC classification number: G03G9/0804
Abstract: A method for producing a toner for developing electrostatic charge images includes: preparing a first dispersion containing, dispersed therein, first aggregated particles containing a binder resin; preparing a second dispersion containing second aggregated particles dispersed therein, the second aggregated particles being prepared by attaching resin particles to surfaces of the first aggregated particles in the first dispersion; heating the second dispersion to a fusion temperature at which the second aggregated particles in the second dispersion are fused to each other; and holding the second dispersion at the fusion temperature. 20 mass% or more of a weak acid relative to the mass of the second aggregated particles is added to the second dispersion during the heating of the second dispersion or the holding of the second dispersion, or during the heating of the second dispersion and the holding of the second dispersion.
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公开(公告)号：US11884816B2
公开(公告)日：2024-01-30
申请号：US16935435
申请日：2020-07-22
Applicant: FUJIFILM BUSINESS INNOVATION CORP.
Inventor： Yukiaki Nakamura , Masaru Takahashi , Ryutaro Kembo
CPC classification number: C08L67/00 , C08L75/04 , C08K5/0041
Abstract: A resin particle includes a binder resin; a fluorescent colorant A; and a colorant B other than the fluorescent colorant A, in which the resin particle includes a region RA in which a content of the fluorescent colorant A is larger than a content of the colorant B and a region RB in which a content of the colorant B is larger than a content of the fluorescent colorant A.
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