Dampening system for offset printing press and method

摘要

A dampening train of rollers in an offset printing press system for delivering dampening solution to a plate cylinder in which the dampening train of rollers is independent of and separate from an inking train of rollers which provide ink to the plate cylinder. The dampening train of rollers has at least four rollers including a dampening solution transfer roller, a dampening form roller, a single mechanically driven drive roller, and at least one rider roller. The plate cylinder engages with the single dampening form roller which transfers an even application of dampening solution to the plate cylinder. The mechanically driven drive roller is surrounded by the dampening form roller and the rider rollers which are positioned at the supply side of the drive roller between the transfer roller and the form roller. The rider rollers and the single dampening form roller engage the single mechanically driven drive roller at different locations about the circumferential surface of the drive roller such that the drive roller provides rotational movement of the rider rollers and the single dampening form roller independently of the inking train of rollers.