Abstract: The module is adapted to be attached to and suspended from a flexographic printing press in order to provide an additional web printing station and other options such as an ultraviolet curing device and a die cutting station. Guide rollers for the web being printed are so positioned that the web may be entrained around them in a manner to present the web to the print station of the module for backside printing thereof after the front side of the web has been printed by the primary press. The module derives its driving power for the various rollers and other components thereof from the primary press, and a quick change feature within the drive coupling between the press and the module enables the rollers of the module print station to be driven in a reverse mode for such backside printing, notwithstanding the fact that the print stations of the main press remain driven in the forward mode, as well as the web.