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    • 3. 发明授权
    • Image forming apparatus having a cover for protecting a transfer region
of an intermediate transfer member when a door is opened
    • 图像形成装置具有用于在打开门时保护中间转印部件的转印区域的盖
    • US5787326A
    • 1998-07-28
    • US626345
    • 1996-04-02
    • Katsutoshi OgawaAkira KumonJunichi Nawama
    • Katsutoshi OgawaAkira KumonJunichi Nawama
    • G03G15/01G03G15/00G03G15/16G03G21/16
    • G03G15/1605G03G21/1633G03G2215/0103G03G2221/1642G03G2221/169
    • In a color electrophotographic printer, an intermediate transfer belt is provided to layer toner images of a plurality of colors, and the toner images on the belt are transferred onto a paper sheet. In order to remove a paper sheet when a paper jam happens, a door is provided in a case of the printer, while a cover is provided to protect a transfer region where the intermediate transfer belt contacts with a paper sheet for transferring the toner images. When the door is opened, the cover moves to cover a portion of the surface of the intermediate transfer belt exposed to the door. When the jammed paper sheet is removed, the image forming process is resumed immediately on the toner images on the intermediate transfer belt. Further, an intermediate transfer unit including the intermediate transfer belt and the cover detachable from the printer may be provided. In a modified example, a transfer member which is connected to a transfer member is provided instead of the cover, and when the door is opened, the transfer member covers the surface of the intermediate transfer belt.
    • 在彩色电子照相打印机中,提供中间转印带以分层多色调色剂图像,并将带上的调色剂图像转印到纸张上。 为了在发生卡纸时去除纸张,在打印机的壳体中设置门,同时提供盖以保护中间转印带与用于转印调色剂图像的纸张接触的转印区域。 当门打开时,盖移动以覆盖暴露于门的中间转印带的表面的一部分。 当卡住的纸张被移除时,图像形成处理在中间转印带上的调色剂图像上立即恢复。 此外,可以提供包括中间转印带和可从打印机拆卸的盖的中间转印单元。 在变形例中,代替盖而设置与转印部件连接的转印部件,当打开门时,转印部件覆盖中间转印带的表面。
    • 6. 发明授权
    • Image forming apparatus and image forming method
    • 图像形成装置及图像形成方法
    • US06286936B1
    • 2001-09-11
    • US09274794
    • 1999-03-23
    • Akira KumonMasahiro AizawaYoshitaka KitaokaKatsutoshi OgawaHiroyuki MatsuoAkira FukanoAkira Ryouji
    • Akira KumonMasahiro AizawaYoshitaka KitaokaKatsutoshi OgawaHiroyuki MatsuoAkira FukanoAkira Ryouji
    • B41J206
    • B41J2/4155
    • An image forming apparatus and an image forming method are characterized in that charged particle jumping can be controlled by applying signals having a small potential difference, and that low-voltage type switching devices can be used as switching devices for the power source. Control electrodes 16 are provided to move charged particles detached from a development roller 2 and to control the movement amount of the charged particles by generating a transfer electric field directly or indirectly between the development roller 2 and a rear electrode 8. A bias electrostatic field is generated between the development roller 2 and the control electrodes 16 by applying a voltage under a jumping start voltage, which is a voltage having the polarity opposite to the polarity of the charged particles and is lower than the jumping start voltage for detaching the charged particles from the development roller 2.
    • 图像形成装置和图像形成方法的特征在于,可以通过施加具有较小电位差的信号来控制带电粒子跳跃,并且可以使用低电压型开关装置作为电源的开关装置。 设置控制电极16以移动从显影辊2分离的带电粒子,并通过在显影辊2和后电极8之间直接或间接产生转印电场来控制带电粒子的移动量。偏置静电场 通过施加具有与带电粒子的极性相反极性的电压的跳跃起始电压下的电压,并且低于用于将带电粒子分离的跳跃开始电压,在显影辊2和控制电极16之间产生电压 显影辊2。