Form dampening roller driving apparatus

摘要

A form dampening roller driving apparatus in which to obviate a hickey a slip is caused to occur between a form dampening roller and a plate cylinder in their mutual area of contact by rotationally driving the form dampening roller and the plate cylinder so they rotate having a difference in peripheral speed between them, and wherein the peripheral speed of the form dampening roller is made variable as desired to make the slip ratio between it and the plate cylinder in their mutual area of contact variable as desired. To this end, the form dampening roller is geared to a vibrator roller, and independent of the main motor for rotationally driving the plate cylinder there is provided a further motor for rotationally driving the form dampening roller independently of the plate cylinder at a rate of rotation that is made arbitrarily variable.