Method and apparatus for the thermal embossing of a substrate

摘要

The hot imprinting process involves passing the substrate and imprinting foil with colour layer opposite each other through an imprinting unit with heater, printing head (16) and counter-pressure drum (12). For preheating, the substrate and foil are pushed onto the surface (20) of the counter-pressure drum. The printing head alternately prints one line in the circumferential direction over the drum surface concentric with it. Then the printing head is pushed forward to print another line across the circumferential direction and parallel to the drum surface.