Roll for printing press

Abstract

PURPOSE: To prevent the fixing of ink to the chromium roll used in the dampening apparatus of a continuous water supply type offset press and to form a thin and uniform water film to the surface of the chromium roll. CONSTITUTION: The fine cracks 13 formed on the surface of a chromium roll 11 are filled with a hydrophilic substance 15 such as water glass and, after the fixing of the substance 5, the surface of the chromium roll 11 is made hydrophilic and smooth. By this method, the fixing of ink to the surface is prevented and vertical stripes of water formed to the surface of the chromium roll 11 along the rotary direction of said roll 11 are eliminated and the chromium roll 11 rich in durability, forming a uniform and thin water film without adding alcohols for lowering the surface tension of water and suitable for a continuous water supply type dampening apparatus is obtained. COPYRIGHT: (C)1992,JPO&Japio

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    Publication numberPublication dateAssigneeTitle
    DE-10209296-A1September 18, 2003Koenig & Bauer AgFeuchtwalze für Feuchtwerke in Druckmaschinen