| 摘要 |
<p>A corona generating device for depositing negative charge on an imaging surface carried on conductive substrate comprises at least one elongated conductive corona discharge electrode, means to connect the electrode to a corona generating potential source, at least one element adjacent the corona discharge electrode capable of adsorbing nitrogen oxide species generated once the corona generating electrode is energized and capable of desorbing nitrogen oxide species once that electrode is not energized, the element being coated with a substantially continuous thin dehydrated alkaline film of an alkali silicate to neutralize the nitrogen oxide species when generated. In a preferred embodiment the corona discharge electrode comprises a thin wire coated at least in a discharge area with a dielectric material and at least one element comprises a conductive shield and an insulating housing having two sides adjacent the shield to define the longitudinal opening to permit ions emitted from the electrode to be directed toward a surface to be charged, both the shield and the two sides of the housing being coated with a substantially continuous thin dehydrated alkaline film of an alkali silicate.</p> |
