| 摘要 |
PURPOSE:To permit stable recording of pictures by a good-quality contrographic method in which a spiral electrode is provided to the surface of a cylindrical part, a back electrode having a knife-edge tip is provided adjacently, and a time- series picture element signal is applied between both electrodes while turning the spiral electrode. CONSTITUTION:A nonmagnetic sleeve 1 is rotatably provided to the periphery of a magnetic roll 3, and a spiral small-width electrode 2 is provided to the periphery of the sleeve 1 in one-round manner. While turning the sleeve 1, insulating magnetic toner T supplied from a container 41 is laminarly adhered to the surface of the sleeve 1. On the other hand, a knife-edged back electrode 5 is allowed to come near the sleeve 1 and set along the sleeve bus, and a recording paper is run along the edge of the back electrode 5. By applying a time-series picture element signal between both electrodes 2 and 5 of such a recorder, stable recording of good-quality pictures by a contrographic method can be attained. |
