Offset press: with different peripheral speed driving plate cylinder, ink roller and damper applicator roller.

摘要

An offset printing machine has a plate cylinder (1), with a roller (6) which applies moisture and rollers (12) which apply the ink. The moisture applying roller (6) is driven so that its peripheral speed is different from that of the plate cylinder (1). A roller (15) which bridges the gap between the inking roller (12) and moisture applying roller (6) is driven at a speed different from that of either of these two rollers (12,6). The difference in speed between the bridging roller (15) and the plate cylinder (1) is greater than the speed difference between the inking roller (12) and the plate cylinder (1) but less than the speed difference between the moisture applying roller (6) and the plate cylinder (1). USE - Offset printing machines.