An apparatus for maintaining the precision of fit of the colors in the pressure on thin materials, can be applied to a rotary printing press for a plurality of colors

摘要

A multi-color printing machine having a plurality of printing units is provided with means for compensating for errors in color registration, for example a device for varying the length of web between one unit and the next, and at least one device for preventing the tension in the web from exceeding an upper limit or falling below a lower limit.