公开(公告)号：US20100260521A1

公开(公告)日：2010-10-14

申请号：US12822463

申请日：2010-06-24

申请人： Tatsuomi MURAYAMA ,  Masanori SHIDA

发明人： Tatsuomi MURAYAMA ,  Masanori SHIDA

IPC分类号： G03G15/20

CPC分类号： G03G15/0126 ,  G03G15/047 ,  G03G15/08 ,  G03G2215/0119

摘要： Provided is an image forming apparatus, including: a first image bearing member; a first transfer member that comes into contact with the intermediate transfer member; a colored toner image forming portion; a second image bearing member; a second transfer member; and a transparent toner image forming portion for forming the transparent toner image wherein the transparent toner image forming portion is provided on an upstream side with respect to the colored toner image forming portion in a movement direction of the intermediate transfer member, and a distance between a most upstream end of the second contact area and the second transfer member in a rotation direction is larger than a distance between a most upstream end of the first contact area and the first transfer member in a rotation direction.

摘要翻译： 提供一种图像形成装置，包括：第一图像承载部件; 与中间转印部件接触的第一转印部件; 彩色调色剂图像形成部分; 第二图像承载部件; 第二转移构件; 以及用于形成透明调色剂图像的透明调色剂图像形成部分，其中透明调色剂图像形成部分在中间转印部件的移动方向上相对于着色调色剂图像形成部分在上游侧设置， 第二接触区域和第二传递构件的旋转方向的最上游端大于第一接触区域的最上游端与第一传递构件之间的旋转方向的距离。

公开(公告)号：US20090317139A1

公开(公告)日：2009-12-24

申请号：US12537375

申请日：2009-08-07

申请人： Fumitake HIROBE ,  Yuichiro TOYOHARA ,  Tatsuomi MURAYAMA ,  Akihiro NOGUCHI

发明人： Fumitake HIROBE ,  Yuichiro TOYOHARA ,  Tatsuomi MURAYAMA ,  Akihiro NOGUCHI

IPC分类号： G03G15/01

CPC分类号： G03G15/0152 ,  G03G15/0121 ,  G03G15/0173 ,  G03G2215/0177

摘要： An image forming apparatus includes a developing apparatus for developing an electrostatic image with a developer comprising at least a toner and a first external additive, the developing apparatus including a plurality of developing devices, containing toners different in color or lightness from each other, in which at least two developing devices contain a dark color toner and a light color toner which have an identical hue and different lightnesses and the developing device containing the light color toner is subjected to a developing operation prior to another developing device; a first transfer apparatus for sequentially transferring toner images, which have been developed by the plurality of developing devices, onto an intermediary transfer member; and a second transfer apparatus for transferring the toner images from the intermediary transfer member all together onto a transfer medium The first external additive includes particles having an aspect ratio of not less than 1.0 and not more than 1.5 and a number-average particle size of not less than 0.06 μm and not more than 0.3 μm, and has a coverage thereof with respect to the light color toner larger than that with respect to the dark color toner in a transferred state on the intermediary transfer member.

摘要翻译： 图像形成装置包括：用至少具有调色剂和第一外部添加剂的显影剂显影静电图像的显影装置，所述显影装置包括多个显影装置，所述显影装置包含彼此颜色或亮度不同的调色剂，其中 至少两个显影装置包含具有相同色调和不同亮度的深色调色剂和浅色调色剂，并且包含浅色调色剂的显影装置在另一显影装置之前经受显影操作; 用于将已由多个显影装置开发的调色剂图像顺序转印到中间转印部件上的第一转印装置; 以及用于将调色剂图像从中间转印部件一起转印到转印介质上的第二转印装置。第一外部添加剂包括长宽比不小于1.0且不大于1.5的数均粒径不大于 小于0.06μm和不大于0.3μm，并且相对于在中间转印部件的转印状态下的深色调色剂，其光色调色剂的覆盖率更大。