| 摘要 |
PCT No. PCT/SE90/00611 Sec. 371 Date Mar. 25, 1992 Sec. 102(e) Date Mar. 25, 1992 PCT Filed Sep. 25, 1990 PCT Pub. No. WO91/04863 PCT Pub. Date Apr. 18, 1991.An image-forming device for an electrographic printer, in which a latent electrical charge pattern of electrical signals is produced in an electrode unit having an electrode matrix situated between a particle carrier and a backing electrode. The matrix comprises a screen or grid of electrodes and a plurality of apertures. The apertures are partly opened and closed electrostatically for the controlled transmission of pigment particles of toner to an information carrier (e.g., paper). The electrodes and other surfaces of the device which are contacted by the pigment particles are provided with a layer of antistatic coating of an electrically conductive or semiconductive material. Tribo friction charges which are produced between the pigment particles and the electrodes and other surfaces are transported by the antistatic coating to a control unit which is connected to ground and which conducts the tribo charges from the device. |
