公开(公告)号：US20240152065A1

公开(公告)日：2024-05-09

申请号：US18549958

申请日：2022-02-28

Applicant: Junichi Watanabe ,  Yuka Mizoguchi ,  Kohsuke Satoh ,  Toshihiko Sugiyama

Inventor： Junichi Watanabe ,  Yuka Mizoguchi ,  Kohsuke Satoh ,  Toshihiko Sugiyama

IPC: G03G9/087 ,  G03G9/08

CPC classification number: G03G9/08755 ,  G03G9/0804 ,  G03G9/08782 ,  G03G2215/0604

Abstract: Resin particles each include a crystalline polyester resin, an amorphous polyester resin, a release agent, and a colorant. The crystalline polyester resin includes an acid component and an alcohol component as constitutional units, and the acid component of the crystalline polyester resin includes plant-derived dicarboxylic acid having 12 or less carbon atoms. The crystalline polyester resin is present as domains in a matrix of the amorphous polyester resin within each resin particle, an average major axis of the domains of the crystalline polyester resin is 2.0 micrometers or less, and an average aspect ratio (major axis/minor axis) of the domains is 4.0 or greater. The resin particles have a carbon radioisotope 14C concentration of 5.4 pMC or greater.

公开(公告)号：US20200301308A1

公开(公告)日：2020-09-24

申请号：US16811483

申请日：2020-03-06

Applicant: Keiji MAKABE ,  Tsuneyasu NAGATOMO ,  Kohsuke SATOH ,  Daichi HISAKUNI ,  Kousuke SUZUKI ,  Shintaro AKIYAMA

Inventor： Keiji MAKABE ,  Tsuneyasu NAGATOMO ,  Kohsuke SATOH ,  Daichi HISAKUNI ,  Kousuke SUZUKI ,  Shintaro AKIYAMA

IPC: G03G15/08 ,  G03G9/08 ,  G03G9/097 ,  G03G9/087

Abstract: An image forming apparatus is provided that includes: an image bearer; a charger; an irradiator; a developing device containing a toner; and a transfer device. The image bearer has a Martens hardness of from 185 to 250 N/m2. The toner satisfies a relation 0.13≤X/Dn≤0.16, where X [μm] represents an average value of an amount of deformation of the toner by micro-indentation at when a load reaches 3.00×10−4 N at a loading rate of 3.0×10−5 N/sec under an environment of 32 degrees C. and 40% RH, and Dn [μm] represents a number average particle diameter of the toner. The toner contains an external additive comprising silica particles and particles composed mainly of strontium titanate. The particles composed mainly of strontium titanate further contain a third element M selected from the group consisting of La, Mg, Ca, Sn, and Si.

公开(公告)号：US09804516B2

公开(公告)日：2017-10-31

申请号：US15134575

申请日：2016-04-21

Applicant: Keiji Makabe ,  Tsuneyasu Nagatomo ,  Kohsuke Satoh ,  Junichi Watanabe ,  Kenji Yoneda ,  Daichi Hisakuni

Inventor： Keiji Makabe ,  Tsuneyasu Nagatomo ,  Kohsuke Satoh ,  Junichi Watanabe ,  Kenji Yoneda ,  Daichi Hisakuni

IPC: G03G9/08 ,  G03G9/087 ,  G03G21/18 ,  G03G15/08

CPC classification number: G03G9/0821 ,  G03G9/0819 ,  G03G9/0827 ,  G03G9/08755 ,  G03G9/08764 ,  G03G15/08 ,  G03G21/18

Abstract: A toner includes a base particle; and an external additive covering the base particle. The toner includes a tetrahydrofuran (THF)-insoluble component having a glass transition temperature determined from a DSC curve when heated for the second time of from −50° C. to 10° C. and an average circularity not greater than 0.98, and satisfies the following relation: Bt−0.025×Ct≦1.80 wherein Bt represents a BET specific surface area [m2/g]; and Ct represents a coverage [%] of the external additive covering the base particle.

公开(公告)号：US20120070774A1

公开(公告)日：2012-03-22

申请号：US13234718

申请日：2011-09-16

Applicant: Kohsuke SATOH ,  Tetsuya Tanaka ,  Masahiro Kawamoto ,  Natsuko Matsushita

Inventor： Kohsuke SATOH ,  Tetsuya Tanaka ,  Masahiro Kawamoto ,  Natsuko Matsushita

IPC: G03G9/08

CPC classification number: G03G9/0808 ,  G03G9/081 ,  G03G9/0819 ,  G03G9/08782 ,  G03G9/08795 ,  G03G9/08797

Abstract: A method of manufacturing toner including mixing mother toner particles containing a binder resin and a coloring agent and first particles having an average primary particle diameter of from 100 nm to 1 μm to using a mixer including a rotary shaft member, multiple stirring members provided to the surface of the shaft member, and a casing to cover the multiple stirring members, wherein the cross section of the inner periphery of the casing relative to a direction perpendicular to the rotation axis of the shaft member is circular around the rotation axis with a substantially constant distance between the inner periphery and the rotation axis. The casing covers the multiple stirring members and a cooling jacket is provided to at least part of the outer periphery of the casing. The weight ratio of the particles to the mother toner particles is from 1.5% to 10%.

Abstract translation: 一种制造调色剂的方法，包括将包含粘合剂树脂和着色剂的母体调色剂颗粒和平均初级粒径为100nm至1μm的第一颗粒混合到使用包括旋转轴构件的混合器中， 轴构件的表面和覆盖多个搅拌构件的壳体，其中壳体的内周的横截面相对于垂直于轴构件的旋转轴线的方向的横截面围绕旋转轴线是大致恒定的 内周和旋转轴之间的距离。 壳体覆盖多个搅拌构件，并且在壳体的外周的至少一部分上设置有冷却套。 颗粒与母体调色剂颗粒的重量比为1.5％至10％。

公开(公告)号：US20240319624A1

公开(公告)日：2024-09-26

申请号：US18613267

申请日：2024-03-22

Applicant: Tsuneyasu NAGATOMO ,  Junichi WATANABE ,  Kohsuke SATOH ,  Yuka MIZOGUCHI

Inventor： Tsuneyasu NAGATOMO ,  Junichi WATANABE ,  Kohsuke SATOH ,  Yuka MIZOGUCHI

IPC: G03G9/087

CPC classification number: G03G9/08755 ,  G03G9/0804 ,  G03G9/0825 ,  G03G9/08782

Abstract: A resin particle may comprise a binder resin, a crystalline polyester resin; and a release agent being in a plurality of domains, which have a domain diameter of 1 μm or less; wherein more than 80% of a surface of each of the plurality of domains of the release agent is covered with the crystalline polyester resin, and a melting point of the crystalline polyester resin is higher than a melting point of the release agent.

公开(公告)号：US20240288789A1

公开(公告)日：2024-08-29

申请号：US18581614

申请日：2024-02-20

Applicant: Kohsuke Satoh ,  Akira Tanaka ,  Taro Araki ,  Hiroki Araya

Inventor： Kohsuke Satoh ,  Akira Tanaka ,  Taro Araki ,  Hiroki Araya

IPC: G03G9/093 ,  C08G63/16

CPC classification number: G03G9/09328 ,  C08G63/16

Abstract: A resin particle contains a binder resin containing a biomass-derived resin and a recycle-based resin, the resin particle including a core-shell structure including a core layer and a shell layer that contains a resin having a sulfonic acid salt group, wherein, in the binder resin, a proportion (percent by mass) of the biomass-derived resin and a proportion (percent by mass) of the recycle-based resin satisfy the following relationship 1:


proportion of recycle-based resin>proportion of biomass-derived resin  Relationship 1.

公开(公告)号：US20230279222A1

公开(公告)日：2023-09-07

申请号：US18177412

申请日：2023-03-02

Applicant: Tsuneyasu NAGATOMO ,  Junichi WATANABE ,  Yuka MIZOGUCHI ,  Kohsuke SATOH

Inventor： Tsuneyasu NAGATOMO ,  Junichi WATANABE ,  Yuka MIZOGUCHI ,  Kohsuke SATOH

IPC: C08L67/03 ,  C08G63/183 ,  G03G9/093 ,  G03G9/087 ,  C08J3/12

CPC classification number: C08L67/03 ,  C08G63/183 ,  G03G9/09392 ,  G03G9/08755 ,  C08J3/126 ,  C08L2207/53 ,  C08J2367/03

Abstract: Resin particles include a binder resin in each of the resin particles. The binder resin includes a biomass-derived resin, and polyethylene terephthalate or polybutylene terephthalate. An amount A of a biomass-derived component of the biomass-derived resin and an amount B of the polyethylene terephthalate or the polybutylene terephthalate satisfy A>B. Each of the resin particles has a core-shell structure including a shell layer and a core layer. An average thickness of the shell layer is from 100 nm to 500 nm.

公开(公告)号：US20230185209A1

公开(公告)日：2023-06-15

申请号：US18070507

申请日：2022-11-29

Applicant: Kazuoki FUWA ,  Kohsuke SATOH ,  Toshihiko SUGIYAMA ,  Natsuko MATSUSHITA

Inventor： Kazuoki FUWA ,  Kohsuke SATOH ,  Toshihiko SUGIYAMA ,  Natsuko MATSUSHITA

IPC: G03G9/087

CPC classification number: G03G9/08755

Abstract: A resin particle contains resin containing a tetrahydrofuran insoluble portion containing a non-linear polymer in which a non-linear prepolymer is cross-linked with a metal ion,

wherein the resin particle has a carbon-14 concentration of 5.4 pMC or greater,
wherein the tetrahydrofuran insoluble portion has a glass transition temperature of from −60 to lower than 0 degrees C. as measured by differential scanning calorimetry.

公开(公告)号：US20230185210A1

公开(公告)日：2023-06-15

申请号：US18079050

申请日：2022-12-12

Applicant: Tsukiko TAKAHASHI ,  Kohsuke SATOH ,  Kazumi SUZUKI ,  Daichi HISAKUNI ,  Kazuoki FUWA

Inventor： Tsukiko TAKAHASHI ,  Kohsuke SATOH ,  Kazumi SUZUKI ,  Daichi HISAKUNI ,  Kazuoki FUWA

IPC: G03G9/093 ,  G03G9/08

CPC classification number: G03G9/09385 ,  G03G9/0821 ,  G03G9/09328

Abstract: A glittering toner includes: a flat metallic pigment having a surface coated with a resin; a polyester-styrene acrylic composite resin; and a polyester resin. When a solubility parameter of the polyester-styrene acrylic composite resin is represented by SP1 (cal/cm3)1/2 and a solubility parameter of the polyester resin is represented by SP2 (cal/cm3)1/2, the SP1 and the SP2 satisfy a relational expression (1): [SP2−SP1>0.3] and the SP1 satisfies a relational expression (2): [10

公开(公告)号：US20230139673A1

公开(公告)日：2023-05-04

申请号：US18046436

申请日：2022-10-13

Applicant: Kohsuke SATOH ,  Tsuneyasu Nagatomo ,  Junichi Watanabe

Inventor： Kohsuke SATOH ,  Tsuneyasu Nagatomo ,  Junichi Watanabe

IPC: C08L67/02 ,  C08G63/183 ,  G03G9/087 ,  G03G9/08

Abstract: The present disclosure provides a resin particle including a binder resin, in which the binder resin contains a biomass-derived resin and a recycled resin, and a content (% by mass) of the biomass-derived resin and a content (% by mass) of the recycled resin in the binder resin satisfy the following relational equation (1): Content of recycled resin >Content of biomass-derived resin.