Drive adjusting unit for rotary sheet printing machine - reduces adjusting time for selective first and back-up printing

摘要

A ring (12) with a friction layer (15) on the outer dia. of the plane side and teeth (16) on its inner dia. provides the coupling between two toothed wheels (9, 11). The toothed section (16) engages with teeth (17) on one wheel (9). The compression springs (13) which act on the ring (12) are located on bolts (14) in the wheel (9) into which are screwed at least three bolts (18) that act against the spring force. Each bolt has a toothed wheel (19) on its end which engages in a toothed rim (20) on the wheel (9). The toothed rim is rotatable using an adjusting shaft.