Crank mechanism for distribution cylinder in a rotary press

摘要

A crank mechanism for use in a rotary printing press is capable of varying the crank stroke length while the rotary printing press is operating. A rotatable eccentric journal and an eccentric bushing are shiftable with respect to each other. A helical groove and a cooperating pin are used to shift the eccentricities of the journal and the bushing to vary the effective stroke length of the crank mechanism.