| 摘要 |
A device is disclosed which selectively generates an electrostatic charge pattern directly on a portion of a surface for use in facsimile process machines or high-speed printers. A matrix is formed by two sets of electrodes, one perpendicular to the other, separated by a perforated metallic spacer having an electret film on each side between it and the electrodes. One set of electrodes is perforated corresponding to the perforations in the spacer. Separate control devices control the application of an electrical voltage to the sets of electrodes enabling an electrostatic charge to be generated directly on a surface covering the perforated electrode. Charged toner particles may be applied to the surface by known techniques to effectuate the printing or reproduction of an image.
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