| 摘要 |
<p>A method and apparatus for selectively depositing positive and negative ions on a receptor. In the preferred embodiment, the ions are deposited in image configuration from a single source 25 of both positive and negative ions. The source 25 comprises a pair of electrodes 46, 48 separated by a dielectric 44. A hole 52 in one of the electrides 48 enables the extraction of either positive or negative ions by the application of a suitable voltage 58 or 62 through a switch 60. The positive and negative images are subsequently developed with different color toners in order to form a highlight color image.</p> |
