Abstract: Compact rotary multi-color printing press for roll-fed webs, especially for use with machines for forming bags of polyethylene and the like. The press has a web feed arrangement which isolates a section of the web around a main drum and which varies the web speed with demand. Dryers are located adjacent to the main drum and in the base of the press, which is supported upon rollers so that the press may be readily moved to an operating site.