Abstract: A two-color offset printing press having two plate cylinders simultaneously engageable with a single blanket cylinder is disclosed. The plate cylinders and the blanket cylinder are rotatably mounted on a printer head fixed to the mainframe of the press. A first set of dampening and inking rollers is mounted on the printer head and engageable with one of the plate cylinders. A second set of dampening and inking rollers, engageable with the other plate cylinder, is mounted on a ball bushing supported carriage linearly movable to and from the printer head along a pair of parallel rails fixed to the mainframe. Image registry between the two plate cylinders is established by an operator-accessible adjustment mechanism for shifting one of the plate cylinders back and forth along its axis of rotation. An electrical safety interlock system precludes operator access to the carriage-associated plate cylinder during predetermined operating modes of the press.

Abstract: A printing press, comprises a plate cylinder, over which material to be printed is passed. An inking mechanism support member is located adjacent the plate member and a plurality of separate inking mechanisms are mounted on the support member and each includes an ink fountain, a fountain roller cooperatively associated with the ink fountain for picking up ink therefrom, a spreader roller cooperatively engageable with the fountain roller to pick up the ink therefrom, and an application roller positioned between the spreader roller and the plate cylinder for applying ink from the spreader roller to the material passed over the said plate cylinder. The individual ink mechanisms may be selectively positioned in an operative position with its application roller in cooperative engagement with the plate cylinder.

Abstract: A perfector printing press having a full size impression cylinder with a blanket thereon between the perfector roll and the plate roll so that printing is not done on the smaller radius perfector roller. The perfector is easier to reach for cleaning and changing and the quality of the printing is improved. The perfector may be spring loaded to prevent jam ups and pivoted about the impression cylinder for easier access.

Abstract: A sheet-fed, high-production, multi-purpose printing press assembled from a group of especially constructed components, including frames, cylinders, sub-assemblies, printing modules and removable and interchangeable segments, each being adapted to be assembled in a wide variety of combinations with the others to produce various simple configurations, to perform single printing functions with high efficiency, as well as various more complex configurations to perform a variety of printing functions and/or combinations of functions (in some cases including concurrent printing and collating).