| 摘要 |
An apparatus for charging a web. The apparatus includes a first charging station and a humidity controller. The first charging station includes a first pair of charging electrodes for applying an electric field across the web in a predetermined direction. The first pair of charging electrodes is located in a gaseous environment. The humidity controller maintains the relative humidity of the gaseous environment at between 20 and 50 percent. The first pair of charging electrodes includes a first electrode and a second electrode, the web passing between the first and second electrodes. The web is separated from the first electrode by a first gap filled with the gaseous environment. In the preferred embodiment of the present invention, the first electrode includes a plurality of protrusions, maintained at a DC potential relative to the second electrode. The DC potential is sufficient to ionize the gaseous environment.
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