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    Image forming apparatus
    4.
    发明公开
    Image forming apparatus 有权
    在einer Bildaufzeichnungvorrichtung转移een Tonerbildes

    公开(公告)号：EP1400871A1

    公开(公告)日：2004-03-24

    申请号：EP03019540.8

    申请日：2003-09-01

    申请人： Ricoh Company, Ltd.

    发明人： Koichi, Yasushi ,  Aoki, Mitsuo ,  Shu, Bing ,  Suzuki, Koji ,  Watanabe, Shigeru ,  Kasai, Tadashi ,  Takahashi, Yutaka

    IPC分类号： G03G15/16

    CPC分类号： G03G15/1675 ,  G03G2215/1614

    摘要： In an image forming apparatus configured to electrostatically transfer a toner image formed on an image carrier (1) to a recording medium with image transferring means of the present invention, pressure (72) is applied between the image carrier and the image transferring means. Toner is provided with relatively high hardness in accordance with the pressure beforehand. Image transfer is effected by reducing a potential difference between the image carrier and the recording medium while maintaining an electric field around the toner the same.

    摘要翻译： 在构成为通过本发明的图像转印装置将形成在图像载体（1）上的调色剂图像静电转印到记录介质上的图像形成装置中，在图像载体和图像转印装置之间施加压力（72）。 调色剂根据压力预先具有较高的硬度。 通过在保持调色剂周围的电场相同的同时减小图像载体和记录介质之间的电位差来实现图像转印。

    Image forming method estimating a halftone granularity
    6.
    发明公开
    Image forming method estimating a halftone granularity 审中-公开
    维尔法伦·祖尔·巴德尔古贡，沃贝恩·哈尔布通

    公开(公告)号：EP1462863A1

    公开(公告)日：2004-09-29

    申请号：EP04007061.7

    申请日：2004-03-24

    申请人： Ricoh Company Ltd.

    发明人： Suzuki, Koji ,  Aoki, Mitsuo ,  Shu, Bing ,  Koichi, Yasushi ,  Soga, Setsuo ,  Kasai, Tadashi ,  Takahashi, Yutaka

    IPC分类号： G03G15/00

    CPC分类号： G03G15/5041 ,  G03G15/00 ,  G03G2215/00033 ,  G03G2215/00071 ,  G03G2215/0602

    摘要： An electrophotographic image forming apparatus capable of reliably forming an image with density gradation, one which does not have a low-quality appearance. The estimated average halftone granularity of the toner image after developing but before electrostatic transfer was set at 0.25 or less. The average halftone granularity was found by measuring the granularity of a toner image at locations of different average brightness by means of newly proposed formula, and averaging the measured values for which the average brightness is 40 to 80. The estimated average halftone granularity was obtained by estimating the average halftone granularity of the toner image on a photoreceptor by means of a newly proposed method.

    摘要翻译： 一种能够可靠地形成具有浓度梯度的图像的电子照相图像形成装置，其不具有低质量的外观。 显影后但静电转印前的调色剂图像的估计平均半色调粒度设定为0.25以下。 通过新提出的公式测量不同平均亮度位置处的调色剂图像的粒度，平均亮度为40至80的测量值，平均半色调颗粒度是通过测量平均半色调粒度得到的。估计的平均半色调粒度通过 通过新提出的方法估计感光体上调色剂图像的平均半色调粒度。

    Image forming method and toner therefor
    7.
    发明公开
    Image forming method and toner therefor 有权
    Verfahren zur Bilderzeugung und Tonerdafür

    公开(公告)号：EP1296201A1

    公开(公告)日：2003-03-26

    申请号：EP02021033.2

    申请日：2002-09-20

    申请人： Ricoh Company Ltd.

    发明人： Aoki, Mituo ,  Hasegawa, Kumi ,  Higaya, Toshiaki ,  Koichi, Yasushi ,  Takahashi, Yutaka ,  Kasai, Tadashi

    IPC分类号： G03G15/20 ,  G03G9/08

    CPC分类号： G03G9/08797 ,  G03G9/0819 ,  G03G9/0821 ,  G03G9/08755 ,  G03G9/08793 ,  G03G9/08795 ,  G03G13/20

    摘要： An image forming method, comprising passing a toner image-bearing sheet (S) through a nip defined between two rollers (11,12) including a heater roller (11) to fix the toner image on the sheet (S), wherein the toner image is formed from a toner comprising a binder resin, and a colorant, wherein the toner image before the passage through the nip has a toner volume V1 and a toner image area S1, wherein the toner image after the passage through the nip has a toner volume V2 and a toner image area S2, and wherein a volume change Vt and an area change St defined by the formulas shown below are 30 % or less and 20 % or less, respectively: Vt (%) = (V1 - V2)/V1 × 100 St (%) = (S2 - S1)/S1 × 100. Alternatively, the toner image before the passage through the nip has a surface roughness of 2.5 µm or less.

    摘要翻译： 一种图像形成方法，包括使调色剂承载片（S）通过限定在包括加热辊（11）的两个辊（11,12）之间的辊隙以将调色剂图像定影在片材（S）上，其中调色剂 图像由包含粘合剂树脂和着色剂的调色剂形成，其中在通过辊隙的通过之前的调色剂图像具有调色剂体积V1和调色剂图像区域S1，其中通过辊隙的调色剂图像具有调色剂 体积V2和调色剂图像区域S2，并且其中由下面所示的公式定义的体积变化量Vt和面积变化量St分别为30％以下且20％以下： Vt（％）=（V1- 另外，通过辊隙的通过前的调色剂图像的表面粗糙度为2.5μm（例如，V2）/ V1×100 St（％）=（S2-S1）/ S1×100 m以下。