Apparatus for smearing fluid on forme

Abstract

An apparatus for applying a conditioning solution, a rubber-covering solution, or a medium for producing an image-differentiating layer, to a surface to be coated, in particular to a rewritable and erasable printing forme positioned on a forme cylinder of a press, includes a coating roller which applies the fluid to the surface to be coated. The coating roller rolls on the surface to be coated and simultaneously executes a translational movement along an axis of rotation of the coating roller relative to the surface to be coated. A smoothing roller which evens out a layer thickness of the fluid on the coating roller rolls on the coating roller. The coating roller has a dry or fluid-free section at the front, in the direction of the translational movement, and a rear section, wherein a device applying the fluid to the coating roller applies to fluid only to the rear section.

Description

technical field [0001] The invention relates to a method for applying a fluid, in particular a conditioning fluid or a gumming fluid or a medium producing an image differential layer, to a surface to be coated, especially a printing plate located in a printing press A device on a rewritable and erasable printing plate on a cylinder. Background technique [0002] When printing with printing formes, a distinction is basically made between the use of write-once printing forme operations on the one hand and rewritable printing forme operations on the other hand. Printing methods using rewritable printing plates are grouped under the keywords "computer and printing press / direct imaging". Under the trade name "DICOweb", the applicant sells a digital printing machine operating with rewritable and erasable printing plates. For the principle of the "DICOweb" technology, see "Printing Equipment Handbook, Helmut Kipphan, pages 674-680, 2000, Springer-Verlag". [0003] During the p...

AI Technical Summary

Problems solved by technology

The known prior art method of applying glue via a dampening solution application roller therefore has the disadvantage that the service life and performance of the fountain solution application roller are adversely affected and that there is a risk of soiling due to intrusion of dust particles. Fountain Solution Risks

In addition, residual ink, usually found on fountain solution applicator rollers, is detrimental to gumming operations

Overall, therefore, the known prior art way of applying glue via the dampening unit of a printing press is disadvantageous

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