Printing assembly

摘要

The present invention provides a printing assembly which includes a printing drum such as an impression drum, a pair of eccentric bearings between and on which the drum is mounted for rotation, a pair of self aligning bearings on which the eccentric bearings are supported, and a pair of frameless motors directly connected to the eccentric bearings in order to effect the rotation thereof through closed loop feedback control, in order to facilitate the automatic and accurate control of pressure level and uniformity along the nip of a printing press.

主权项

1. A printing assembly comprising:
a drum; a pair of eccentric bearings between and on which the drum is mounted for rotation; and a pair of drives to effect independent rotation of the pair of eccentric bearings to adjust a pressure applied by the drum, wherein the printing assembly is configured to effect actuation of the pair of drives in response to torque based feedback derived from an electric current drawn by each of the pair of drives.