Abstract: Axially adjacent first, second and third carriages are independently rotatable about a common vertical axis. The first carriage supports a plurality of platens which are spaced from the axis of rotation. The second and third carriages have a plurality of mechanisms which support a circumferentially disposed group of silk screen frames, respectively, for selectively pivoting between an inactive position wherein each screen is at an acute angle with respect to horizontal and an active horizontal position wherein the screen selected for printing is brought into contact with a platen on which there is material to be printed. The lowermost group of screen frames are arranged on the second carriage with at least one angular gap between them when they are in their angulated inactive positions.