| 摘要 |
A plurality of individual printing groups are arranged about the periphery of a counter-pressure cylinder in a multi-color printing unit. The plurality of printing groups can selectively be combined into dual printing groups. These printing groups can be spaced at an acute angle. Alternatively, the printing groups can extend in a vertical direction and are arranged closely or at a short distance from each other. Selected ones of these printing groups can be raised and lowered. |
