PRINTING PRESS WITH TEAR-LINE TRACING MEANS

摘要

A printing press including a printing section delivering printed sheets onto a conveying section at a receiving station, the conveying section incorporating a horizontally movable conveyor provided with grippers for grasping printed sheets discharged from the receiving station and moving them away. A rotary shaft is disposed transversely of and above the conveyor, onto which is provided a tear-line tracer assembly which projects radially and lengthwise of the shaft. This assembly includes a tracer blade having an elongated serrated straight cutting edge extending parallel to the axis of rotation of the shaft and being adapted to produce tear-lines when applied over and across the printed sheets when the latter are moved by the conveyor. A rotary support roll is provided beneath the conveyor and over the top of which printed sheets bear as they are moved by the conveyor. The axes of rotation of the shaft and of the support roll lie in a common vertical plane and the cutting edge of the blade as the tearline assembly is adjustable, when lying in the aforesaid vertical plane, with respect to the top of the support roll to ensure production of the tear-lines and the printed sheet material when the latter moves therebetween.