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    IMAGE FORMING APPARATUS
    3.
    发明申请
    IMAGE FORMING APPARATUS 有权

    公开(公告)号：US20250093809A1

    公开(公告)日：2025-03-20

    申请号：US18581389

    申请日：2024-02-20

    Applicant: FUJIFILM Business Innovation Corp.

    Inventor： Yuki OYAMADA ,  Kenta IDE ,  Masahiro IWASAKI ,  Yoichi KIGOSHI ,  Keisuke KUSANO

    IPC: G03G15/01 ,  G03G5/06 ,  G03G15/02

    Abstract: An image forming apparatus includes an electrophotographic photoreceptor that includes a conductive substrate, an undercoat layer provided on the conductive substrate, containing a binder resin and an electron transport material, and satisfying Expression 1-1, and a photosensitive layer provided on the undercoat layer, a charging device that charges a surface of the electrophotographic photoreceptor, an electrostatic latent image forming device that forms an electrostatic latent image on the charged surface of the electrophotographic photoreceptor, a developing device that develops the electrostatic latent image formed on the surface of the electrophotographic photoreceptor with a developer containing a toner to form a toner image, and a transfer device that transfers the toner image to a surface of a recording medium, in which a moving time of an outer peripheral surface of the electrophotographic photoreceptor, required from charging performed by the charging device to development performed by the developing device, is 90 msec or longer, 0.20≤EF1−ELUMO1≤0.60  Expression 1-1: (in Expression 1-1, EF1 represents a Fermi level of the undercoat layer, and ELUMO1 represents an energy level of LUMO of the undercoat layer).

    IMAGE FORMING APPARATUS
    4.
    发明公开
    IMAGE FORMING APPARATUS 审中-公开

    公开(公告)号：US20240329557A1

    公开(公告)日：2024-10-03

    申请号：US18240792

    申请日：2023-08-31

    Applicant: FUJIFILM Business Innovation Corp.

    Inventor： Keisuke KUSANO ,  Masahiro IWASAKI ,  Yoichi KIGOSHI ,  Yuki OYAMADA ,  Kenta IDE

    IPC: G03G15/02 ,  G03G9/087 ,  G03G21/00

    CPC classification number: G03G15/0216 ,  G03G9/0872 ,  G03G21/0011

    Abstract: An image forming apparatus includes an electrophotographic photoreceptor that has an outermost surface layer containing fluorine-containing resin particles, a charge transport material, and a binder resin, in which the number of carboxy groups contained in the fluorine-containing resin particles is 0 or greater and 30 or less per 106 carbon atoms, and the outermost surface layer has a tan δ of 0.025 or greater and 0.030 or less, a charging device that comes into direct contact with the electrophotographic photoreceptor and applies only a DC voltage to charge the electrophotographic photoreceptor, an electrostatic latent image forming device that forms an electrostatic latent image on a surface of the charged electrophotographic photoreceptor, a developing device that develops the electrostatic latent image formed on the surface of the electrophotographic photoreceptor with a developer containing a toner to form a toner image, a transfer device that transfers the toner image by bringing the electrophotographic photoreceptor and a medium to be transferred into direct contact with each other, and a cleaning device that cleans the surface of the electrophotographic photoreceptor.

    ELECTROPHOTOGRAPHIC PHOTORECEPTOR, PROCESS CARTRIDGE, AND IMAGE FORMING APPARATUS
    7.
    发明申请
    ELECTROPHOTOGRAPHIC PHOTORECEPTOR, PROCESS CARTRIDGE, AND IMAGE FORMING APPARATUS 有权

    公开(公告)号：US20250102933A1

    公开(公告)日：2025-03-27

    申请号：US18586550

    申请日：2024-02-26

    Applicant: FUJIFILM Business Innovation Corp.

    Inventor： Yuki OYAMADA ,  Masahiro IWASAKI

    IPC: G03G5/14

    Abstract: An electrophotographic photoreceptor includes a conductive substrate, an undercoat layer that is provided on the conductive substrate, and a photosensitive layer provided on the undercoat layer, in which the undercoat layer contains a binder resin and an electron transport material having a crystal density of 1.62 g/cm3 or greater, and a full width at half maximum (FWHM) of a maximum intensity peak in an X-ray diffraction spectrum measured in a thickness direction is 5.0 or less.

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