Folding device for roller rotating printing presses

摘要

Folding device for roller rotating printing presses for folding a prefolded pack of sheets which is fed by a pair of endless conveyor belts underneath a folding knife in parallel direction of its feeding movement wherein at the arriving end and on both sides of the folding knife, a finger is moved into the feeding path of the pack of sheets so as to engage an advancing front edge of the pack of sheets. The finger is forcibly moved into rotation by a shaft which runs laterally beneath the endless conveyor belts whereby the rotation moves the finger in a working cycle above the lower plane of the endless conveyor belts and the finger runs slowly in direction of the feeding motion, but more slowly than the same.