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    • 8. 发明授权
    • Image forming apparatus having mixed toner consumption mode
    • 具有混合调色剂消耗模式的图像形成装置
    • US06519428B1
    • 2003-02-11
    • US09712178
    • 2000-11-15
    • Megumi OhtoshiMasumi SatoHitoshi IshibashiYoshinori Ozawa
    • Megumi OhtoshiMasumi SatoHitoshi IshibashiYoshinori Ozawa
    • G03G1500
    • G03G15/0105G03G15/0121G03G15/0194G03G2215/0119
    • An image forming apparatus of the present invention includes a plurality of image carriers sequentially arranged in a direction of paper conveyance. Developing devices each form a toner image of particular color on one image carrier associated therewith. Cleaning devices each remove residual toner left on the surface of the associated image carriers after the transfer of the toner image to the recording medium. A toner recycling device is provided between the cleaning device located at the most upstream position in the direction of paper conveyance and the developing device associated therewith, but not provided between the cleaning device located at the most downstream position the developing device assigned therewith. With this configuration, the apparatus obviates troubles ascribable to the mixture of toner of different colors occurring in the most downstream developing device. In addition, at a time other than the time of transferring toner images from the image carriers to the recording medium, a controller activates a mixed toner consumption mode such that any one of the developing devices, other than a developing device located at most upstream position in the direction of conveyance of the recording medium, is caused to deposit toner on the image carrier which is than transferred to a recording medium carrier and then cleaned to remove the toner.
    • 本发明的图像形成装置包括顺序地沿着纸张传送方向布置的多个图像载体。 显影装置各自在与其相关联的一个图像载体上形成特定颜色的调色剂图像。 在将调色剂图像转印到记录介质之后,清洁装置每次去除留在相关联的图像载体表面上的剩余调色剂。 调色剂回收装置设置在位于纸张传送方向上的最上游位置处的清洁装置与与其相关联的显影装置之间,但不设置在位于最下游位置处的清洁装置之间。 利用这种结构,该装置避免了由于最下游显影装置中出现的不同颜色的调色剂的混合引起的麻烦。 此外,除了将调色剂图像从图像载体转印到记录介质的时间之外的时间,控制器启动混合调色剂消耗模式,使得除显影装置之外的任何一个显影装置位于最上游位置 在记录介质的传送方向上,将调色剂沉积在转印到记录介质载体上的图像载体上,然后清洁以除去调色剂。