Rapid changeover printer

In a station of a compound printer for processing a continuous web, the station having a frame and at least one cylinder mounted within said frame;

• means for rapid changeover of said cylinder, said rapid changeover means comprising:
• bearing means mounting said cylinder within said frame for sliding transverse movement of said bearing means and cylinder in a direction parallel to the cylinder axis along a first track means,
• a cart having a main frame,
• bearing means supporting a replacement cylinder within said cart main frame for sliding transverse movement of said replacement cylinder in a direction parallel to the replacement cylinder axis along a second track means,
• said cart having a third track means for slidingly receiving said station cylinder,
• means for positioning said cart adjacent said station with said second track means parallel to said first track means and with said first and third track means in transverse alignment for the transverse sliding movement of said cylinder and its bearings from said first track means of said station and onto said third track means of said cart, and
• means for positioning said second track means in transverse alignment with said first track means for transverse sliding movement of said replacement cylinder and its bearings from said second track means of said cart onto said first track means of said station.