| 摘要 |
A developing unit and method for maintaining constant density in an electrophotographic imaging process. The developing unit comprises a developer roll (11), wherein the developer roll (11) comprises a surface and a first voltage is applied to the developer roll (11); a skive device (13,19), wherein the skive device (13,19) is positioned in contact with the developer roll (11) and a second voltage is applied to the skive device (13,19); a cleaning device (14) for the developer roll (11), wherein the cleaning device (14) is in contact with the developer roll (11) ; and an ink container (10), wherein the developer roll (11) and the cleaning device (14) are inside the ink container (10). It is preferred that a current measuring device is present to measure current flow between said skive device (13,19) and said developer, or a voltage meter is present to measure a voltage across a known resistor that is in series with the power supply to the skive device (13,19).
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