利索-全球专利检索

  1. Login
  2. Sign Up

Search Results

14 records (took 0.015 seconds)

    TONER
    1.
    发明申请
    TONER 有权

    公开(公告)号：US20230015518A1

    公开(公告)日：2023-01-19

    申请号：US17808835

    申请日：2022-06-24

    Applicant: CANON KABUSHIKI KAISHA

    Inventor： Dai Nozaki ,  Yoshitaka Suzumura ,  Tomohiro Unno

    IPC: G03G9/087 ,  G03G9/08 ,  G03G9/083 ,  G03G9/097

    Abstract: A toner comprising a toner particle comprising a binder resin, a nonmagnetic inorganic oxide particle A, and a magnetic iron oxide particle B, wherein a softening point of a chloroform-soluble component of the toner particle is not greater than 90° C.; the nonmagnetic inorganic oxide particle A and the magnetic iron oxide particle B are internally added to the toner particle; the nonmagnetic inorganic oxide particle A comprises as its main component at least one element selected from the group consisting of Si, Mg, Al, Ti, and Sr; a proportion of the inorganic oxide particles having a long diameter of specific length is in specific range; and a value of a ratio of a number-average particle diameter of the long diameter for the nonmagnetic inorganic oxide particle A, to a number-average particle diameter of the long diameter for the magnetic iron oxide particle B, is 5 to 30.

    ELECTROPHOTOGRAPHIC APPARATUS, PROCESS CARTRIDGE, AND CARTRIDGE SET
    2.
    发明申请
    ELECTROPHOTOGRAPHIC APPARATUS, PROCESS CARTRIDGE, AND CARTRIDGE SET 有权

    公开(公告)号：US20210116859A1

    公开(公告)日：2021-04-22

    申请号：US17071246

    申请日：2020-10-15

    Applicant: CANON KABUSHIKI KAISHA

    Inventor： Tomohiro Unno ,  Kosuke Fukudome ,  Dai Nozaki ,  Kozue Uratani ,  Yuta Komiya ,  Kazuhiro Yamauchi ,  Masahiro Kurachi

    IPC: G03G21/18 ,  G03G9/087

    Abstract: An electrophotographic apparatus having an electrophotographic photosensitive member, a charging unit, and a developing unit for forming a toner image, wherein the charging unit has a conductive member disposed to be contactable with the electrophotographic photosensitive member, a conductive layer at the surface of the conductive member has a matrix-domain structure, at least a portion of the domains is exposed at the outer surface of the conductive member, the outer surface of the conductive member is constituted at least of the matrix and these domains, a volume resistivity R1 of the matrix is greater than 1.00×1012 Ω·cm, a volume resistivity R2 of the domains is less than R1, Martens hardness G1 of the matrix and Martens hardness G2 of the domains satisfy a prescribed relationship, and an onset temperature T(A) for a storage elastic modulus E′ of the toner is not more than 80.0° C.

    TONER
    3.
    发明申请
    TONER 有权

    公开(公告)号：US20220171301A1

    公开(公告)日：2022-06-02

    申请号：US17526486

    申请日：2021-11-15

    Applicant: CANON KABUSHIKI KAISHA

    Inventor： Yoshitaka Suzumura ,  Dai Nozaki ,  Tomohiro Unno

    IPC: G03G9/083 ,  G03G9/087 ,  G03G9/093 ,  G03G9/097 ,  C08G63/672

    Abstract: The toner contains a toner particle having a core-shell structure including: a core containing a binder resin and a colorant; and a shell, wherein the toner contains a crystalline material, and the shell contains an amorphous thermoplastic resin; and when SP values of the crystalline material and the amorphous thermoplastic resin, which are calculated by the Fedors method, are defined as SPc (J/cm3)0.5 and SPa (J/cm3)0.5, respectively, the SPc and the SPa (J/cm3) satisfy a particular relationship, and when the toner is observed by SEM after the toner has been subjected to ruthenium staining that treats the toner in an atmosphere of RuO4 gas having 500 Pa for 15 minutes, a ratio S2 (%) of an area occupied by the crystalline material per area of the toner satisfies a particular relationship.

    Toner
    5.
    发明授权
    Toner 有权

    公开(公告)号：US09658549B2

    公开(公告)日：2017-05-23

    申请号：US15154802

    申请日：2016-05-13

    Applicant: CANON KABUSHIKI KAISHA

    Inventor： Masatake Tanaka ,  Yoshihiro Nakagawa ,  Naoya Isono ,  Harumi Takada ,  Yuichi Yajima ,  Dai Nozaki

    IPC: G03G9/087

    CPC classification number: G03G9/08728

    Abstract: A toner having a toner particle including a binder resin, wherein the binder resin includes a styrene acrylic resin and a vinyl-modified crystalline polyester resin, the vinyl-modified crystalline polyester resin has a crystalline polyester segment having structures of following i) or a structure of following ii), i) at least two structures selected from the group consisting of a structure derived from an aliphatic dicarboxylic acid, a structure derived from an aliphatic diol and a structure derived from an aliphatic hydroxycarboxylic acid; ii) a structure derived from an aliphatic hydroxycarboxylic acid; and the vinyl-modified crystalline polyester resin has a specific modification rate.

    Electrophotographic apparatus, process cartridge, and cartridge set
    6.
    发明授权
    Electrophotographic apparatus, process cartridge, and cartridge set 有权

    公开(公告)号：US11474442B2

    公开(公告)日：2022-10-18

    申请号：US17071227

    申请日：2020-10-15

    Applicant: CANON KABUSHIKI KAISHA

    Inventor： Kosuke Fukudome ,  Tomohiro Unno ,  Dai Nozaki ,  Kozue Uratani ,  Yuta Komiya ,  Masahiro Kurachi ,  Kazuhiro Yamauchi ,  Motonari Ito

    IPC: G03G15/02 ,  G03G9/08 ,  G03G9/087 ,  G03G15/054

    Abstract: An electrophotographic apparatus having an electrophotographic photosensitive member, a charging unit, and a developing unit for forming a toner image on a surface of the electrophotographic photosensitive member, wherein the charging unit has a conductive member disposed to be contactable with the electrophotographic photosensitive member; a conductive layer at the surface of the conductive member has a matrix and a plurality of domains dispersed in the matrix; at least a portion of the domains is exposed at the outer surface of the conductive member; the outer surface of the conductive member is constituted of at least the matrix and the domains; a volume resistivity R1 of the matrix is greater than 1.00×1012 Ω·cm; a volume resistivity R2 of the domains is smaller than R1; the developing unit contains the toner; and a dielectric loss tangent of the toner is at least 0.0027.

    Toner
    8.
    发明授权
    Toner 有权

    公开(公告)号：US12197170B2

    公开(公告)日：2025-01-14

    申请号：US17519938

    申请日：2021-11-05

    Applicant: CANON KABUSHIKI KAISHA

    Inventor： Yuta Komiya ,  Kosuke Fukudome ,  Dai Nozaki ,  Kozue Uratani ,  Takuya Mizuguchi ,  Tomoko Sugita

    IPC: G03G9/087

    Abstract: A toner comprising a toner particle comprising a binder resin, and an ester wax A having a specific structure, wherein in a diffraction spectrum obtained by an X-ray diffractometer after the toner has been allowed to stand at 120° C. for 5 minutes and then at 60° C. for 5 minutes, assuming that a spectrum having a maximum peak in a range where 2θ is from 5.45° to 5.95° is P1 and an integrated intensity of the P1 is S1, and a spectrum having a maximum peak in a range where 2θ is from 21.45° to 21.95° is P2 and an integrated intensity of the P2 is S2, relationships of formulas (2) and (3) below are satisfied. S1/S2≤0.25  (2) S2≥1000  (3)

    TONER AND METHOD FOR PRODUCING TONER
    9.
    发明申请
    TONER AND METHOD FOR PRODUCING TONER 有权

    公开(公告)号：US20220365457A1

    公开(公告)日：2022-11-17

    申请号：US17659273

    申请日：2022-04-14

    Applicant: CANON KABUSHIKI KAISHA

    Inventor： Tomohiro Unno ,  Dai Nozaki ,  Yoshitaka Suzumura

    IPC: G03G9/093 ,  G03G9/08

    Abstract: A toner and a method for producing the toner, wherein; the toner comprising a toner particle comprising a polyester resin, and has a softening point of 150° C. or less; the toner particle has the polyester resin within 100 nm from a surface of the toner particle, and where a value obtained by dividing an amount of counted ions for a structure represented by following formula (A) measured from the surface of the toner particle to a depth of 100 nm by TOF-SIMS by a total amount of counted ions is taken as a standard value, one or more peaks of the standard value are present within a range of 100 nm from the surface of the toner particle, and where A(dmax) denotes a standard value at a maximum peak and A(0) denotes a standard value on the toner particle surface, formula 1.15≤A(dmax)/A(0)≤5.00 is satisfied.

    Electrophotographic apparatus, process cartridge, and cartridge set
    10.
    发明授权
    Electrophotographic apparatus, process cartridge, and cartridge set 有权

    公开(公告)号：US11449000B2

    公开(公告)日：2022-09-20

    申请号：US17071246

    申请日：2020-10-15

    Applicant: CANON KABUSHIKI KAISHA

    Inventor： Tomohiro Unno ,  Kosuke Fukudome ,  Dai Nozaki ,  Kozue Uratani ,  Yuta Komiya ,  Kazuhiro Yamauchi ,  Masahiro Kurachi

    IPC: G03G21/18 ,  G03G9/087 ,  G03G15/02 ,  G03G5/05

    Abstract: An electrophotographic apparatus having an electrophotographic photosensitive member, a charging unit, and a developing unit for forming a toner image, wherein the charging unit has a conductive member disposed to be contactable with the electrophotographic photosensitive member, a conductive layer at the surface of the conductive member has a matrix-domain structure, at least a portion of the domains is exposed at the outer surface of the conductive member, the outer surface of the conductive member is constituted at least of the matrix and these domains, a volume resistivity R1 of the matrix is greater than 1.00×1012 Ω·cm, a volume resistivity R2 of the domains is less than R1, Martens hardness G1 of the matrix and Martens hardness G2 of the domains satisfy a prescribed relationship, and an onset temperature T(A) for a storage elastic modulus E′ of the toner is not more than 80.0° C.

Patent Agency Ranking