Patent ID: 6082257
Filing Date: 2000-07-04
Classification: B41F,B41P

Abstract:
A printing unit of the type having at least one offset lithographic printing station, comprising:an offset plate cylinder mounted for rotation about a first axis of rotation, the plate cylinder have a plate supporting surface and a bearer on each side of the plate supporting surface, said bearers being located at a radial distance with respect to the first axis of rotation and having a continuous bearer surface; which rotates with the offset plate cylinderan anilox roller for applying ink or coating to a plate on the plate cylinder, the anilox roller having a central surface portion adapted for applying ink or coating to a plate, the anilox roller having laterally spaced end portions outside the central portion with concentrically located bearers on each end portion, the bearers having a continuous bearer surface adapted to engage one of the bearers on the plate cylinder; andan anilox mounting structure mounting the anilox roller for rotation about a second axis, and for movement of the anilox roller relative to the plate cylinder between a retracted position and an engaged position, wherein the bearer surfaces of the anilox roller are brought into contact with the bearer surfaces of the plate cylinder to repeatably set the anilox roller at a desired position relative to the plate cylinder, to prevent the anilox roller from bouncing and thereby creating printing defects when it reaches a gap area in the printing cylinder.