PURPOSE: To enhance printing quality and the printing durability of a printing plate by detecting the displacement of a plate cylinder and that of an anilox roller to hold not only the printing pressure between the plate cylinder and an impression cylinder but also that between the plate cylinder and the anilox roller.
CONSTITUTION: The aqueous ink supplied to an anilox roller 3 by an inking arrangement is transferred to the printing plate P on a plate cylinder 1 and further transferred to the printing paper 4 running between the plate cylinder 1 and an impression cylinder 2 to be printed thereon and, at this time, displacement detectors 7a, 7a detect the displacement of the plate cylinder 1 while displacement detectors 7b, 7b detect the displacement of the anilox roller 3 and the obtained detection signals are processed by a printing controller 9 to be sent to a printing pressure control motor 12. The printing pressure control motor 12 is driven in a forward or reverse direction corresponding to displacement and the rotation thereof is transmitted to an eccentric bearing 11 to control not only the shaft-to-shaft distance between the plate cylinder 1 and the impression cylinder 2 but also that between the plate cylinder 1 and the anilox roller 3, and the printing pressure between the plate cylinder 1 and the impression cylinder 2 as well as that between the plate cylinder 1 and the anilox roller 3 are held to proper values.
MORIMOTO KATSUHIKO
NAKANO TAKASHI
HARA HIROYUKI
