Printing pressure control apparatus for intaglio press

摘要

Apparatus for applying and relieving the printing pressure between the plate cylinder and the impression cylinder of an intaglio press, including fast acting hydraulic motor driven means for moving one cylinder to and relieving the printing pressure. Wedge means are provided for adjusting the spacing between the plate cylinder axis and the impression cylinder axis. Motors drive the wedge means, and the control means for the wedge driving motors is interlocked with the control for the pressure applying and relieving apparatus so that the wedges cannot move while the cylinders are under printing pressure.