Apparatuses and processes for laminating a finish layer of paper, plastics, film, foil, and other thin sheet material to corrugated material along a corrugator line. The finish layers may be single layer or composite material and are preferably, but not necessarily preprinted, reverse printed, etched...http://www.google.de/patents/US5437752?utm_source=gb-gplus-sharePatent US5437752 - Method of applying a finishing layer in a corrugating line
