The already welded sheets fall, after their trimming, onto an inclined display table. There the sheet sets which are now ready for laminating are collected. By means of a mirror, the operator has a good view of the processed products and can empty the table at the right time. Optionally, they can be collected in an automatic stacker which collects the ready sheets automatically on a trolley. As soon as this is full, the operator receives an announcement from the system and can empty it. The finished sets are clearly much less exposed to external influences and so remain almost completely free from damages. Furthermore the automatic stacker offers the advantage that the operator must not empty the collector constantly by hand and thus the system achieves a higher throughput.