| 摘要 |
PURPOSE:To simplify the structure of a copying medium, make possible multi- color copying and obtain higher definition by a method wherein heat-sublimating dyes in the copying medium is sublimated according to image element information by means of the local generation of heat when electricity is being applied, before being attached to a copying body. CONSTITUTION:A copying medium 13 in such a state that solid dyes 11 are being attached to a belt 6 is transferred to the portion between recording paper 1 and a needle recording electrode 14. If a current flows in this state between the recording elecrrode 14 and an opposite electrode 15 according to image element information 17, the end portion of the recording electrode 14 of the copying medium 13 locally generates heat due to the Joule heat effect, sublimating the dyes 11 in that portion from a solid to liquid. Since a temperature inclination occurs in the direction of low temperatures starting from the recording electrode 14 up to a platen 3 via the copying medium 13 and the recording paper 1, the liquefied dye 11 is cooled on the surface of the recording paper 1, before being attached to the recording paper 1 as they are returned to a solid. As a result, a dyeing point is formed by the dyes 11 as the tip of the needle recording electrode 13 moves. |
