| 摘要 |
This invention related to a developing unit for maintaining constant density in an electrophotographic imaging process, said developing unit comprising: a) a developer comprising a developing surface and a first voltage is applied to the developer; b) a depositor, wherein said depositor is positioned to maintain a gap with the developer and a second voltage is applied to the depositor; c) a cleaning device for said developer, wherein the cleaning device is in contact with the developer; and d) an ink container, wherein the developer, the depositor and the cleaning device are inside the ink container.
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