Image forming method
    1.
    发明授权
    Image forming method 失效
    图像形成方法

    公开(公告)号:US08722303B2

    公开(公告)日:2014-05-13

    申请号:US13594118

    申请日:2012-08-24

    IPC分类号: G03G9/08

    摘要: An image forming method using a two component developing system is provided in which a print speed is not less than 300 mm/s, a peak-to-peak voltage of an AC component in a developing bias is not more than 1.3 kV, a sufficient image density can be ensured, and a recorded image having a small amount of magnetic carrier remaining on the image and having high image quality can be obtained. A magnetic carrier that forms a two component developer contains a magnetic core and a resin. The magnetic core is a ferrite containing Sr and Ca inside thereof at the same time, having a small crystal grain diameter, a high density crystal-grain boundary structure, and an extremely large capacitance of the grain boundary. Use of the ferrite can provide the above method.

    摘要翻译: 提供一种使用双组分显影系统的图像形成方法,其中打印速度不小于300mm / s,显影偏压中的AC分量的峰 - 峰电压不大于1.3kV,足够 可以确保图像浓度,并且可以获得具有保留在图像上并具有高图像质量的少量磁性载体的记录图像。 形成双组分显影剂的磁性载体含有磁芯和树脂。 磁芯是同时具有其中的Sr和Ca的铁素体,具有小的晶粒直径,高密度晶粒边界结构和极大的晶界电容。 使用铁氧体可以提供上述方法。

    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

    IPC分类号: G03G9/083

    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 METHOD
    4.
    发明申请
    IMAGE FORMING METHOD 失效
    图像形成方法

    公开(公告)号:US20130052580A1

    公开(公告)日:2013-02-28

    申请号:US13594118

    申请日:2012-08-24

    IPC分类号: G03G13/08

    摘要: An image forming method using a two component developing system is provided in which a print speed is not less than 300 mm/s, a peak-to-peak voltage of an AC component in a developing bias is not more than 1.3 kV, a sufficient image density can be ensured, and a recorded image having a small amount of magnetic carrier remains on the image and having high image quality can be obtained. A magnetic carrier that forms a two component developer contains a magnetic core and a resin. The magnetic core is a ferrite containing Sr and Ca inside thereof at the same time, having a small crystal grain diameter, a high density crystal-grain boundary structure, and an extremely large capacitance of the grain boundary. Use of the ferrite can provide the above method.

    摘要翻译: 提供一种使用双组分显影系统的图像形成方法,其中打印速度不小于300mm / s,显影偏压中的AC分量的峰 - 峰电压不大于1.3kV,足够 可以确保图像浓度,并且可以获得具有少量磁性载体的记录图像保留在图像上并且具有高图像质量。 形成双组分显影剂的磁性载体含有磁芯和树脂。 磁芯是同时具有其中的Sr和Ca的铁素体,具有小的晶粒直径,高密度晶粒边界结构和极大的晶界电容。 使用铁氧体可以提供上述方法。

    Image forming apparatus
    5.
    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

    IPC分类号: G03G15/08

    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。