| 摘要 |
PURPOSE: To repeatedly make illustration possible and to repeatedly erase a film (a layer, an ink and a toner) for guiding the ink by facing an erasing apparatus for guiding a jetted stream of a medium under pressure to the illustrated surface of a plate at a specified angle and making the plate and the erasing apparatus relatively movable. CONSTITUTION: A method for eliminating repeatedly a film for guiding an ink from the illustrated surface of a plate being suitable for offset printing is provided. Erasing apparatus 2 and 11 or guiding jetted streams 3 and 13 of a medium under pressure are faced to the surface of the plates 1 and 8. In addition, the erasing apparatus 2 and 11 are respectively provided with at least one of nozzles 6 and 12 in such a way that the jetted streams 3 and 13 are made to collide with the surfaces at an angle α being smaller than 90 deg. obliquely to the surfaces of the plates 1 and 8. In addition, the plates 1 and 8 and the erasing apparatus 2 and 11 are made to be relatively movable each other. |
