Patent ID: 7343855
Filing Date: 2008-03-18
Classification: B41F,B41P

Abstract:
1. A newspaper printing press comprising: at least one offset printing group adapted to print a material by waterless printing; a temperature controlled forme cylinder, and a cooperating transfer cylinder in said at least one offset printing group; at least one waterless planographic printing forme on said forme cylinder in said at least one offset printing group, said at least one waterless planographic printing forme having raster lines of a printing forme raster frequency of between 50 and 120 lines per centimeter; an inking unit assigned to said at least one offset printing group and including an ink supply; a paste printing ink said ink supply and having a viscosity between 10 Pa*s and 150 Pa*s at a temperature range of 22° C. to 40° C.; a screen roller directly contacting said paste printing ink in said ink supply and conveying said paste printing ink to said at least one waterless planographic printing forme of said at least one printing group, said screen roller having an ink receiving screen roller surface and an axis of rotation; a ceramic coating on said screen roller surface; a plane extending orthogonally to said screen roller axis of rotation; and a plurality of surface markings on said ceramic coating on said screen roller surface, said surface markings being formed in said ceramic coating, and extending at an angle of inclination in a clockwise direction with respect to said plane, said plurality of surface markings being adapted to pick up said paste printing ink from said paste printing ink supply, said angle of inclination being between 50° and 80°, said plurality of surface markings having a screen raster frequency of no greater than 80 lines per centimeter, said screen roller raster frequency and said at least one waterless planographic printing forme raster frequency being matched to each other.