Assembly for multi-color pattern printing of floor coverings, with printing stations for the separate colors, has a printing unit at the leading station to print edge marks to be registered by an optical monitor to correct deviations

摘要

The assembly (20) for coating flat materials with dyes in different colors to form patterns, and especially floor coverings (10), has a succession of printing stations (21,23,25,27) with printing rollers (22,24,26,28) to apply the colors separately. Markings are applied to the edges of the materials for an optical monitor (30) and control (31), moving across the material width, to register their positions and set machine speeds by a correction value to compensate for possible deviations from the nominal setting and ensure accurate printing in register at each station. The markings are applied by a printing unit (29) at the initial station, moving across the material width, to print marks at the edges of floor coverings of different widths.