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    UNIT AND IMAGE FORMING APPARATUS
    7.
    发明申请
    UNIT AND IMAGE FORMING APPARATUS 有权

    公开(公告)号：US20220244663A1

    公开(公告)日：2022-08-04

    申请号：US17397232

    申请日：2021-08-09

    申请人： FUJIFILM Business Innovation Corp.

    发明人： Masato ONO ,  Masayuki SEKO ,  Tomoaki TANAKA ,  Yukiaki NAKAMURA ,  Ryutaro KEMBO

    IPC分类号： G03G15/16

    摘要： 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.

    TRANSFER DEVICE AND IMAGE FORMING APPARATUS
    8.
    发明公开
    TRANSFER DEVICE AND IMAGE FORMING APPARATUS 审中-公开

    公开(公告)号：US20240329569A1

    公开(公告)日：2024-10-03

    申请号：US18615200

    申请日：2024-03-25

    申请人： FUJIFILM Business Innovation Corp.

    发明人： Satoya SUGIURA ,  Hiroaki TANAKA ,  Masato ONO ,  Yosuke KUBO ,  Iori NISHIMURA ,  Shigeru FUKUDA ,  Daisuke TANEMURA ,  Masayuki SEKO ,  Koichi MATSUMOTO ,  Masato FURUKAWA

    IPC分类号： G03G15/16

    CPC分类号： G03G15/162 ,  G03G2215/1614

    摘要： A transfer device includes an intermediate transfer member consisting of an endless belt which consists of a layer containing a resin including at least one resin selected from the group consisting of a polyimide resin, a polyamide-imide resin, an aromatic polyether ether ketone resin, a polyphenylene sulfide resin, and a polyetherimide resin, conductive carbon particles, a silicone oil containing at least one polymer selected from the group consisting of dimethylpolysiloxane and organic group-substituted dimethylpolysiloxane or has the layer as an outermost layer, and in which an integral value of a statistical quantity L(r) represented by the following Equation (1) is 0 or more and 0.1 or less at an interparticle distance r of 0.05 μm or more and 0.30 μm or less in a spatial distribution of the conductive carbon particles existing in a 6.3 μm×4.2 μm evaluation region within an outer peripheral surface of the endless belt, a primary transfer device having a primary transfer roll made of a metal that applies an electric field to the intermediate transfer member by coming into contact with an inner peripheral surface of the intermediate transfer member, and performing primary transfer of a toner image formed on a surface of an image holder to the outer peripheral surface of the intermediate transfer member, and a secondary transfer device performing secondary transfer of the toner image transferred to the outer peripheral surface of the intermediate transfer member to a surface of a recording medium.








    L
    ⁡
    (
    r
    )

    :=




    K
    ⁡
    (
    r
    )

    /
    π


    -
    r





    (
    1
    )









    [In Equation (1), r represents the interparticle distance, and K(r) represents the Ripley's K function K(r) represented by the following Equation (2).]












    K
    ⁡
    (
    r
    )

    :=



    ∑

    i
    ≠
    j

    N



    1
    ⁢

    (



    ❘
    "\[LeftBracketingBar]"



    X
    i

    -

    X
    j



    ❘
    "\[RightBracketingBar]"


    ≤
    r

    )

    /

    s
    ⁡
    (


    ❘
    "\[LeftBracketingBar]"



    X
    i

    -

    X
    j



    ❘
    "\[RightBracketingBar]"


    )




    λ
    2






    (
    2
    )









    [In Equation (2), 1(|Xi−Xj|≤r) represents an indicator function, Xi and Xj represent coordinates of points i and j respectively, |Xi−Xj| represents a Euclidean distance between the coordinates Xi and Xj, r represents the interparticle distance, s(|Xi−Xj|) represents an edge correction factor s(x) of an evaluation region represented by the following Equation (3), x equals |Xi−Xj|, N represents the total number of particles in the evaluation region, and λ represents a number density of particles in the evaluation region.]






    s(x):=LxLy−x/π(2Lx+2Ly−x)  (3)



    [In Equation (3), Lx and Ly represent lengths (μm) of the sides of the evaluation region in an x-axis direction and a y-axis direction respectively, x equals |Xi−Xj|, Xi and Xj represent coordinates of points i and j respectively, and |Xi−Xj| represents a Euclidean distance between the coordinates Xi and Xj.]

    TRANSFER DEVICE AND IMAGE FORMING APPARATUS
    9.
    发明公开
    TRANSFER DEVICE AND IMAGE FORMING APPARATUS 审中-公开

    公开(公告)号：US20240329556A1

    公开(公告)日：2024-10-03

    申请号：US18451495

    申请日：2023-08-17

    申请人： FUJIFILM Business Innovation Corp.

    发明人： Satoya SUGIURA ,  Hiroaki TANAKA ,  Masato ONO ,  Yosuke KUBO ,  lori NISHIMURA ,  Shigeru FUKUDA ,  Daisuke TANEMURA ,  Masayuki SEKO ,  Koichi MATSUMOTO

    IPC分类号： G03G15/01 ,  G03G9/08 ,  G03G15/02 ,  G03G15/16

    CPC分类号： G03G15/0131 ,  G03G9/08 ,  G03G15/0189 ,  G03G15/0216 ,  G03G15/162

    摘要： A transfer device includes an intermediate transfer member consisting of an endless belt which consists of a layer containing a resin including at least one resin selected from the group consisting of a polyimide resin, a polyamide-imide resin, an aromatic polyether ether ketone resin, a polyphenylene sulfide resin, and a polyetherimide resin, conductive carbon particles, a silicone oil containing at least one polymer selected from the group consisting of dimethylpolysiloxane and organic group-substituted dimethylpolysiloxane or has the layer as an outermost layer, and in which an integral value of a statistical quantity L(r) represented by the following Equation (1) is 0 or more and 0.1 or less at an interparticle distance r of 0.05 μm or more and 0.30 μm or less in a spatial distribution of the conductive carbon particles existing in a 6.3 μm×4.2 μm evaluation region within an outer peripheral surface of the endless belt, a primary transfer device having a primary transfer roll made of a metal that applies an electric field to the intermediate transfer member by coming into contact with an inner peripheral surface of the intermediate transfer member, and performing primary transfer of a toner image formed on a surface of an image holder to the outer peripheral surface of the intermediate transfer member, and a secondary transfer device performing secondary transfer of the toner image transferred to the outer peripheral surface of the intermediate transfer member to a surface of a recording medium.








    L
    ⁡
    (
    r
    )

    :=




    K
    ⁡
    (
    r
    )

    /
    π


    -
    r





    (
    1
    )







    [In Equation (1), r represents the interparticle distance, and K(r) represents the Ripley's K function K(r) represented by the following Equation (2).]








    K
    ⁡
    (
    r
    )

    :=



    ∑

    i
    ≠
    j

    N


    1
    ⁢


    (



    ❘
    "\[LeftBracketingBar]"



    X
    i

    -

    X
    j



    ❘
    "\[RightBracketingBar]"


    ≤
    r

    )

    /

    s
    ⁡
    (


    ❘
    "\[LeftBracketingBar]"



    X
    i

    -

    X
    j



    ❘
    "\[RightBracketingBar]"


    )





    λ
    2






    (
    2
    )







    [In Equation (2), 1(|Xi−Xj|≤r) represents an indicator function, Xi and Xj represent coordinates of points i and j respectively, |Xi−Xj| represents a Euclidean distance between the coordinates Xi and Xj, r represents the interparticle distance, s(|Xi−Xj|) represents an edge correction factor s(x) of an evaluation region represented by the following Equation (3), x equals |Xi−Xj|, N represents the total number of particles in the evaluation region, and λ represents a number density of particles in the evaluation region.]








    s
    ⁡
    (
    x
    )

    :=



    L
    x

    ⁢

    L
    y


    -


    x
    π

    ⁢

    (


    2
    ⁢

    L
    x


    +

    2
    ⁢

    L
    y


    -
    x

    )







    (
    3
    )







    [In Equation (3), Lx and Ly represent lengths (μm) of the sides of the evaluation region in an x-axis direction and a y-axis direction respectively, x equals |Xi−Xj|, Xi and Xj represent coordinates of points i and j respectively, and |Xi−Xj| represents a Euclidean distance between the coordinates Xi and Xj.]