| 摘要 |
A web-fed offset rotary printing machine is disclosed. First and second satellite printing units are utilized to perform multiple color recto and verso printing. The cylinder diameters and bearer ring diameters of the first satellite unit are capable of being varied with respect to those of the second unit to accurately control paper web tension and hence to accomplish a color registry which is highly accurate. Calibrated underlay sheets are used to adjust the cylinder diameters and thin, hard, flexible bands are secured on the outer peripheries of inner rings to vary the bearer ring diameters. |
