公开(公告)号：US5983060A

公开(公告)日：1999-11-09

申请号：US50907

申请日：1998-03-31

申请人： Shin-Ichi Namekata ,  Hideo Yuu ,  Satoru Uchida ,  Mitsuru Takahashi ,  Katsuya Kawagoe ,  Hiroshi Ono ,  Toshiaki Motohashi

发明人： Shin-Ichi Namekata ,  Hideo Yuu ,  Satoru Uchida ,  Mitsuru Takahashi ,  Katsuya Kawagoe ,  Hiroshi Ono ,  Toshiaki Motohashi

IPC分类号： G03G15/16

CPC分类号： G03G15/161 ,  G03G15/162 ,  G03G2215/0177 ,  G03G2215/1623 ,  G03G2215/1661

摘要： An image forming apparatus which utilizes an intermediate transfer member. Plural toner images, for example of different colors, can be superimposed on the intermediate transfer member, and then can be transferred to a paper sheet. A discharging device is provided for discharging a charge applied to the intermediate transfer member. Further, a value of a voltage provided by this discharging device and/or a voltage provided for a transfer bias is proportional to an actual surface potential on the intermediate transfer member, which is proportional to the number of times toner images have been formed on the intermediate transfer member prior to transfer to the paper sheet. For example, if a full color toner image is formed on the intermediate transfer member, which may result from four operations of transferring individual toner images onto the intermediate transfer member, a voltage provided by the discharger and/or by a transfer bias device will be higher than that if only a monocolor image has been formed on the intermediate transfer member. Further, the image forming apparatus can be operable to form images on thicker paper, and in this instance a drive speed of devices in the image forming apparatus can be reduced, and a voltage applied to a pre-charger can also accordingly be reduced. The image forming apparatus can also include a cleaning device from the intermediate transfer belt, and the functions of both the intermediate transfer member discharging device and a cleaning device can be combined in one brush roller.

摘要翻译： 一种利用中间转印部件的图像形成装置。 可以将例如不同颜色的多种调色剂图像叠加在中间转印部件上，然后可以转印到纸张上。 设置有用于对施加到中间转印部件的电荷进行放电的放电装置。 此外，由该放电装置提供的电压值和/或为转印偏压提供的电压的值与中间转印部件上的实际表面电位成比例，该实际表面电位与在上述形成的调色剂图像的次数成正比 在转印到纸张之前的中间转印部件。 例如，如果在中间转印部件上形成全色调色剂图像，这可能由将各个调色剂图像转印到中间转印部件上的四个操作产生，则由放电器和/或转印偏压装置提供的电压将为 高于在中间转印部件上仅形成单色图像的情况。 此外，图像形成装置可以操作以在较厚的纸上形成图像，并且在这种情况下，可以减少图像形成装置中的装置的驱动速度，并且还可以相应地减小施加到预充电器的电压。 图像形成装置还可以包括来自中间转印带的清洁装置，并且中间转印部件排出装置和清洁装置的功能可以组合在一个刷辊中。

公开(公告)号：US5887218A

公开(公告)日：1999-03-23

申请号：US872051

申请日：1997-06-10

申请人： Hideo Yuu ,  Mitsuru Seto ,  Takashi Bisaiji ,  Naoko Iwata

发明人： Hideo Yuu ,  Mitsuru Seto ,  Takashi Bisaiji ,  Naoko Iwata

IPC分类号： G03G15/16 ,  G03G15/01

CPC分类号： G03G15/1605 ,  G03G2215/00084

摘要： An image forming apparatus in which a toner image formed on an image bearing member is first transferred onto an intermediate transfer element and then onto a transfer member. A potential of the image bearing member is detected and a transfer bias voltage applied to the intermediate transfer element is controlled according to the potential of the image bearing member. Undesired images such as transfer blurring due to discharge at the first transfer area, and a solid image scattering and so-called crow's claw mark due to increase of resistance of the transfer member under low absolute humidities are improved.

摘要翻译： 图像形成装置，其中形成在图像承载部件上的调色剂图像首先转印到中间转印元件上，然后转印到转印部件上。 检测图像承载部件的电位，并且根据图像承载部件的电位来控制施加到中间转印元件的转印偏压。 提高了由于在低绝对湿度下由于传送部件的电阻增加而导致的不期望的图像，例如由于在第一传送区域处的放电而导致的传输模糊，以及固体图像散射和所谓的乌鸦爪标记。