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    MAGNETIC CARRIER
    2.
    发明申请
    MAGNETIC CARRIER 审中-公开
    磁性载体

    公开(公告)号：US20110111337A1

    公开(公告)日：2011-05-12

    申请号：US12939086

    申请日：2010-11-03

    申请人： Juun Horie ,  Kenta Kubo ,  Tomoaki Miyazawa ,  Takeshi Yamamoto ,  Manami Haraguchi ,  Hirokazu Usami ,  Yoshinobu Baba ,  Koh Ishigami ,  Hitoshi Oda

    发明人： Juun Horie ,  Kenta Kubo ,  Tomoaki Miyazawa ,  Takeshi Yamamoto ,  Manami Haraguchi ,  Hirokazu Usami ,  Yoshinobu Baba ,  Koh Ishigami ,  Hitoshi Oda

    IPC分类号： G03G9/083

    CPC分类号： G03G9/107 ,  G03G9/1075 ,  G03G9/113 ,  G03G9/1131

    摘要： In the formation of images by a two-component development system, provided is a magnetic carrier that can be used to output an image which has sufficient density, in which few white spots are present in a low-density portion located near the boundary between a high-density region and a low-density region, and in which the low-density portion has good graininess. The magnetic carrier contains magnetic carrier particles each of which has resin and a magnetic particle. The magnetic particle contains ferrite phases and phases comprising a perovskite-structured compound. The ferrite phases and phases comprising a perovskite-structured compound are combined.

    摘要翻译： 在通过双组分显影系统形成图像时，提供了一种磁性载体，其可以用于输出具有足够密度的图像，其中位于靠近边界附近的低密度部分中存在少量白点 高密度区域和低密度区域，其中低密度部分具有良好的颗粒度。 磁性载体包含各自具有树脂和磁性颗粒的磁性载体颗粒。 磁性颗粒含有铁素体相和包含钙钛矿结构化合物的相。 组合包含钙钛矿结构化合物的铁素体相和相。

    Image forming apparatus
    3.
    发明授权
    Image forming apparatus 有权
    图像形成装置

    公开(公告)号：US07912389B2

    公开(公告)日：2011-03-22

    申请号：US12022575

    申请日：2008-01-30

    申请人： Takeshi Yamamoto ,  Manami Haraguchi ,  Kenta Kubo ,  Yoshinobu Baba ,  Koh Ishigami

    发明人： Takeshi Yamamoto ,  Manami Haraguchi ,  Kenta Kubo ,  Yoshinobu Baba ,  Koh Ishigami

    IPC分类号： G03G15/08

    CPC分类号： G03G15/065 ,  G03G5/04 ,  G03G15/0806 ,  G03G15/5037 ,  G03G15/5062 ,  G03G2215/00037 ,  G03G2215/0607

    摘要： An image forming apparatus, wherein the following formulae are satisfied: 0.22 ≤ ( M / S ) L ≤ 0.4 , ⁢ ( Q M ) L = Vc ( Lt 2 ⁢ ɛ 0 ⁢ ɛ t + Ld ɛ 0 ⁢ ɛ d ) × ( M S ) L ( Dt ⁢ ⁢ max - Dt 0.1 ) { λ × ( M S ) L - 0.1 } ⁢ ( Lt 2 ⁢ ɛ 0 ⁢ ɛ t + Ld ɛ 0 ⁢ ɛ d ) × ( M S ) L 500 ≤ αβ ≤ ( Dt ⁢ ⁢ max - Dt 0.1 ) { λ × ( M S ) L - 0.1 } ⁢ ( Lt 2 ⁢ ɛ 0 ⁢ ɛ t + Ld ɛ 0 ⁢ ɛ d ) × ( M S ) L 150 αβ ≥ ( Dt ⁢ ⁢ max - Dt 0.1 ) { λ × ( M S ) L - 0.1 } 150 where (M/S)L: a toner bearing amount in a maximum density image portion of a photosensitive drum, (Q/M)L: an average charge amount of the toner in the maximum density portion, Vc: an absolute value of a potential difference between a DC-component of a developing bias and the maximum density portion, Lt: a toner layer thickness of the maximum density portion, Ld: a drum thickness, εt: a relative permittivity of the toner layer, εd: a relative permittivity of the drum, ε0: a vacuum permittivity, Dtmax: a transmission density in a maximum density image portion on the paper after fixation, Dt0.1: a transmission density in an image on the paper when the toner bearing amount on the paper after fixation is 0.1 mg/cm2, and λ: a transfer efficiency of the toner, α = ( Dt ⁢ ⁢ max - Dt 0.1 ) { λ × ( M S ) L - 0.1 } , ⁢ and ⁢ ⁢ β = 1 / ( Q / M ) L .

    摘要翻译： 图像形成装置，其中满足以下公式：0.22≤（M / S）L≤0.4，（QM）L = Vc（Lt2ε0εt + Ldεεεε）×（MS ）L（Dt·最大 - Dt 0.1）{λ×（MS）L-0.1}（Lt2ε0εt + Ldε0εd）×（MS）L 500≤α＆bgr; ≤（Dt·最大 - Dt 0.1）{λ×（M S）L -0.1}（Lt2ε0εt + Ld∈0εd）×（M S）L 150α＆bgr; ≥（Dt·最大 - Dt 0.1）{λ×（MS）L-0.1} 150其中（M / S）L：感光鼓的最大浓度图像部分中的调色剂承载量（Q / M）L ：最大密度部分中的调色剂的平均电荷量，Vc：显影偏压的DC分量与最大浓度部分之间的电位差的绝对值，Lt：最大密度部分的调色剂层厚度， Ld：鼓厚度，t：调色剂层的相对介电常数，e：鼓的相对介电常数; e：真空介电常数Dtmax：最大密度图像部分的透射密度 固定后的纸张，Dt0.1：固定后纸张上的调色剂承载量为0.1mg / cm 2时在纸张上的图像中的透射密度，λ：调色剂的转印效率，α=（Dt + max - Dt 0.1）{λ×（MS）L-0.1}，和ü＆bgr; = 1 /（Q / M）L。

    IMAGE FORMING APPARATUS
    10.
    发明申请
    IMAGE FORMING APPARATUS 有权

    公开(公告)号：US20080187338A1

    公开(公告)日：2008-08-07

    申请号：US12022575

    申请日：2008-01-30

    申请人： Takeshi Yamamoto ,  Manami Haraguchi ,  Kenta Kubo ,  Yoshinobu Baba ,  Koh Ishigami

    发明人： Takeshi Yamamoto ,  Manami Haraguchi ,  Kenta Kubo ,  Yoshinobu Baba ,  Koh Ishigami

    IPC分类号： G03G15/06

    CPC分类号： G03G15/065 ,  G03G5/04 ,  G03G15/0806 ,  G03G15/5037 ,  G03G15/5062 ,  G03G2215/00037 ,  G03G2215/0607

    摘要： An image forming apparatus, wherein the following formulae are satisfied: 0.22 ≤ ( M / S ) L ≤ 0.4 ,  ( Q M ) L = Vc ( Lt 2  ɛ 0  ɛ t + Ld ɛ 0  ɛ d ) × ( M S ) L ( Dt   max - Dt 0.1 ) { λ × ( M S ) L - 0.1 }  ( Lt 2  ɛ 0  ɛ t + Ld ɛ 0  ɛ d ) × ( M S ) L 500 ≤ αβ ≤ ( Dt   max - Dt 0.1 ) { λ × ( M S ) L - 0.1 }  ( Lt 2  ɛ 0  ɛ t + Ld ɛ 0  ɛ d ) × ( M S ) L 150 αβ ≥ ( Dt   max - Dt 0.1 ) { λ × ( M S ) L - 0.1 } 150 where (M/S)L: a toner bearing amount in a maximum density image portion of a photosensitive drum, (Q/M)L: an average charge amount of the toner in the maximum density portion, Vc: an absolute value of a potential difference between a DC-component of a developing bias and the maximum density portion, Lt: a toner layer thickness of the maximum density portion, Ld: a drum thickness, εt: a relative permittivity of the toner layer, εd: a relative permittivity of the drum, ε0: a vacuum permittivity, Dtmax: a transmission density in a maximum density image portion on the paper after fixation, Dt0.1: a transmission density in an image on the paper when the toner bearing amount on the paper after fixation is 0.1 mg/cm2, and λ: a transfer efficiency of the toner, α = ( Dt   max - Dt 0.1 ) { λ × ( M S ) L - 0.1 } ,  and   β = 1 / ( Q / M ) L .