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9 条记录 (耗时 0.018 秒)

    Toner
    1.
    发明授权
    Toner 有权

    公开(公告)号：US11829104B2

    公开(公告)日：2023-11-28

    申请号：US17241330

    申请日：2021-04-27

    申请人： CANON KABUSHIKI KAISHA

    发明人： Takuya Mizuguchi ,  Yoshitaka Suzumura ,  Hiroyuki Tomono ,  Osamu Matsushita ,  Shotaro Nomura

    IPC分类号： G03G9/087

    CPC分类号： G03G9/08755 ,  G03G9/08746 ,  G03G9/08759

    摘要： A toner comprising a toner particle comprising a binder resin and a crystalline resin, wherein the binder resin comprises an amorphous resin, when the toner is measured with a temperature-modulated differential scanning calorimeter, at least one endothermic peak derived from the crystalline resin is present in a temperature range from 55.0° C. to 95.0° C. in a total heat flow; and a ratio of an endothermic quantity of the endothermic peak in a reversing heat flow to an endothermic quantity of the endothermic peak in the total heat flow is 50.0% or more, a glass transition temperature Tg1st obtained in the reversing heat flow in a first temperature rise and a glass transition temperature Tg2nd obtained in a reversing heat flow in a second temperature rise satisfy Tg1st−Tg2nd≥7.0° C.

    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：US20210116829A1

    公开(公告)日：2021-04-22

    申请号：US17071535

    申请日：2020-10-15

    申请人： CANON KABUSHIKI KAISHA

    发明人： Hiroyuki Tomono ,  Yoshitaka Suzumura ,  Takuya Mizuguchi ,  Osamu Matsushita ,  Masahiro Kurachi ,  Kazuhiro Yamauchi ,  Issei Imamura

    IPC分类号： G03G9/08 ,  G03G9/097 ,  G03G9/087 ,  C08L19/00 ,  G03G15/02

    摘要： An electrophotographic apparatus comprising an electrophotographic photosensitive member, a charging device and a developing device, wherein the charging device comprises a conductive member arranged to be capable of contacting the electrophotographic photosensitive member, the conductive layer at the outer surface of the conductive member comprises a matrix and a plurality of domains dispersed in the matrix, at least some of the domains are exposed at the outer surface of the conductive member, the matrix has a volume resistivity R1 of larger than 1.00×1012 Ω·cm, the volume resistivity R1 of the matrix is 1.0×105 times or more a volume resistivity R2 of the domains, the developing device comprises the toner comprising a toner particle and a silica fine particle, and a coverage ratio of the toner surface with the silica fine particles is from 62.0% by area to 100.0% by area as determined by X-ray photoelectron spectroscopy.

    ELECTROPHOTOGRAPHIC APPARATUS, PROCESS CARTRIDGE, AND CARTRIDGE SET
    3.
    发明申请
    ELECTROPHOTOGRAPHIC APPARATUS, PROCESS CARTRIDGE, AND CARTRIDGE SET 有权

    公开(公告)号：US20210116860A1

    公开(公告)日：2021-04-22

    申请号：US17071283

    申请日：2020-10-15

    申请人： CANON KABUSHIKI KAISHA

    发明人： Yoshitaka Suzumura ,  Hiroyuki Tomono ,  Takuya Mizuguchi ,  Osamu Matsushita ,  Shunsuke Matsushita ,  Masahiro Kurachi ,  Kazuhiro Yamauchi

    IPC分类号： G03G21/18 ,  G03G9/087 ,  G03G9/08 ,  C08K3/04 ,  C08K3/26 ,  C08L19/00

    摘要： An electrophotographic apparatus comprising an electrophotographic photosensitive member, a charging device and a developing device, wherein the charging device comprises a conductive member arranged to be capable of contacting the electrophotographic photosensitive member, a conductive layer of the conductive member comprises a matrix domain structure, at least a part of the domains Dt is exposed at the conductive member outer surface, the matrix has a volume resistivity R1 of larger than 1.00×1012 Ω·cm, the domains Dt has a volume resistivity of smaller than R1, the developing device comprises the toner, domains Dc formed of the crystalline material exist in a cross section of the toner, distances between adjacent wall surfaces of the domains Dc is from 30 to 1,100 nm, and a weight-average particle diameter D4 of the toner and distances Dms between adjacent wall surfaces between the domains Dt satisfies D4≥Dms.

    Electrophotographic apparatus, process cartridge, and cartridge set
    5.
    发明授权
    Electrophotographic apparatus, process cartridge, and cartridge set 有权

    公开(公告)号：US11360426B2

    公开(公告)日：2022-06-14

    申请号：US17071283

    申请日：2020-10-15

    申请人： CANON KABUSHIKI KAISHA

    发明人： Yoshitaka Suzumura ,  Hiroyuki Tomono ,  Takuya Mizuguchi ,  Osamu Matsushita ,  Shunsuke Matsushita ,  Masahiro Kurachi ,  Kazuhiro Yamauchi

    IPC分类号： G03G21/18 ,  G03G15/02 ,  G03G9/087 ,  G03G9/08

    摘要： An electrophotographic apparatus comprising an electrophotographic photosensitive member, a charging device and a developing device, wherein the charging device comprises a conductive member arranged to be capable of contacting the electrophotographic photosensitive member, a conductive layer of the conductive member comprises a matrix domain structure, at least a part of the domains Dt is exposed at the conductive member outer surface, the matrix has a volume resistivity R1 of larger than 1.00×1012 Ω·cm, the domains Dt has a volume resistivity of smaller than R1, the developing device comprises the toner, domains Dc formed of the crystalline material exist in a cross section of the toner, distances between adjacent wall surfaces of the domains Dc is from 30 to 1,100 nm, and a weight-average particle diameter D4 of the toner and distances Dms between adjacent wall surfaces between the domains Dt satisfies D4≥Dms.

    TONER
    6.
    发明申请
    TONER 有权

    公开(公告)号：US20210356878A1

    公开(公告)日：2021-11-18

    申请号：US17241330

    申请日：2021-04-27

    申请人： CANON KABUSHIKI KAISHA

    发明人： Takuya Mizuguchi ,  Yoshitaka Suzumura ,  Hiroyuki Tomono ,  Osamu Matsushita ,  Shotaro Nomura

    IPC分类号： G03G9/087

    摘要： A toner comprising a toner particle comprising a binder resin and a crystalline resin, wherein the binder resin comprises an amorphous resin, when the toner is measured with a temperature-modulated differential scanning calorimeter, at least one endothermic peak derived from the crystalline resin is present in a temperature range from 55.0° C. to 95.0° C. in a total heat flow; and a ratio of an endothermic quantity of the endothermic peak in a reversing heat flow to an endothermic quantity of the endothermic peak in the total heat flow is 50.0% or more, a glass transition temperature Tg1st obtained in the reversing heat flow in a first temperature rise and a glass transition temperature Tg2nd obtained in a reversing heat flow in a second temperature rise satisfy Tg1st−Tg2nd≥7.0° C.

    TONER
    7.
    发明申请
    TONER 有权

    公开(公告)号：US20210080846A1

    公开(公告)日：2021-03-18

    申请号：US17012889

    申请日：2020-09-04

    申请人： CANON KABUSHIKI KAISHA

    发明人： Takuya Mizuguchi ,  Yoshitaka Suzumura ,  Hiroyuki Tomono ,  Osamu Matsushita ,  Shuntaro Watanabe ,  Hiroki Akiyama ,  Hiroki Kagawa

    IPC分类号： G03G9/087

    摘要： A toner comprising a toner particle including a binder resin, wherein in a temperature T (° C.)-storage elastic modulus G′ (Pa) curve obtained by measuring the toner with a rheometer, a storage elastic modulus G′ (80° C.) at 80° C. is from 2.0×103 Pa to 2.0×105 Pa; and a local minimum value of a change amount (dG′/dT) of a storage elastic modulus G′ in a range of 60° C. to 80° C. with respect to a temperature T is −1.0×106 or less, and when the temperature of the toner is raised, where a projected area of the toner at 80° C. is S1 (μm2), a radius of the projected area of the toner at 80° C. is R1 (μm), and a projected area of the toner at 120° C. is S2 (μm2), the S1, R1 and S2 satisfy a following formula (1): S2/S1×1/R1≤0.22.  (1)

    Electrophotographic apparatus, process cartridge and cartridge set
    9.
    发明授权
    Electrophotographic apparatus, process cartridge and cartridge set 有权

    公开(公告)号：US11360405B2

    公开(公告)日：2022-06-14

    申请号：US17071535

    申请日：2020-10-15

    申请人： CANON KABUSHIKI KAISHA

    发明人： Hiroyuki Tomono ,  Yoshitaka Suzumura ,  Takuya Mizuguchi ,  Osamu Matsushita ,  Masahiro Kurachi ,  Kazuhiro Yamauchi ,  Issei Imamura

    IPC分类号： G03G15/02 ,  G03G9/08

    摘要： An electrophotographic apparatus comprising an electrophotographic photosensitive member, a charging device and a developing device, wherein the charging device comprises a conductive member arranged to be capable of contacting the electrophotographic photosensitive member, the conductive layer at the outer surface of the conductive member comprises a matrix and a plurality of domains dispersed in the matrix, at least some of the domains are exposed at the outer surface of the conductive member, the matrix has a volume resistivity R1 of larger than 1.00×1012 Ω·cm, the volume resistivity R1 of the matrix is 1.0×105 times or more a volume resistivity R2 of the domains, the developing device comprises the toner comprising a toner particle and a silica fine particle, and a coverage ratio of the toner surface with the silica fine particles is from 62.0% by area to 100.0% by area as determined by X-ray photoelectron spectroscopy.