Device for the circumferential adjustment of a form cylinder

摘要

An arrangement for adjusting the rotational phase angle of the form cylinder of a printing machine to obtain proper image registration, for example for multicolor printing operations. Adjustment is accomplished by a toothed ring which can be rotationally adjusted and which is slidably engaged with a connecting gear affixed to a drive gear. A control shaft may be rotated to axially move the drive gear with respect to the toothed ring, and an expandable radial bearing is coupled between the control shaft and the drive gear.