Device for driving a print roller for transporting material for exposure or printing, includes ceramic ring mounted on drive and on to which the print roller drive engages

摘要

The print roller (1) drive device provides a very accurate speed of transportation of the material, in particular photographic paper or ink-jet paper, to be exposed or printed and incorporates a system for maintaining the transportation speed at an extremely constant level, with the drive direct engaging with the periphery of the roller (1), and specifically including a piezo-motor or several piezo-motors.