| 摘要 |
1. Device for moistening printing elements in printing-machines, particularly for dosing the moistening agent on printing-plates in offset printing-machines, in which device there is disposed over the length and the diameter of a moisture pick-up roller (4) associated with the printing-plate cylinder (1), the moistening roller (2) and the moisture pressure roller (3), a pressure vessel (6) receiving the moistening agent (5), the portion of the casing (7) of which vessel facing the moisture pick-up roller has a capillary-porous structure, characterized in that, in this structure, there are embedded side by side electrical resistors (8) to which a voltage can be applied individually or in groups by means of an electronic control circuit (9) so that the size of the capillaries and thus their moistening-agent transmission is modified by the heat generated. |
