Patent ID: 6566039
Filing Date: 2003-05-20
Classification: B41C,B41M,B41N,B41P,G03F

Abstract:
A variable data lithographic printing device comprising:(a) a printing cylinder; (b) a coating means for depositing a photosensitive layer on the cylinder surface, wherein said photosensitive layer is capable of hardening upon exposure to an actinic radiation and exhibits an affinity or aversion substantially opposite to the affinity or aversion of said cylinder surface to at least one printing liquid selected from the group consisting of ink and an abhesive fluid for ink; (c) an exposure means for exposing the photosensitive layer on the cylinder surface with the actinic radiation according to digital imaging information to form hardened areas in the exposed areas and non-hardened areas in the non-exposed areas; and (d) an inking means for applying ink or both fountain solution and ink to the cylinder surface; (e) wherein the means (b) to (d) are mounted proximate the cylinder surface and sequentially arranged along the cylinder surface in the rotating direction of the cylinder; and each means of (b) to (d) completes its designed function to the cylinder surface areas in the designed printing width which pass by said means in each single pass during printing operation.