Device for stretching covering foil strip in a thermoforming system has roller with same transport speed as first of two transport devices with higher transport speed in normal operation

摘要

The device has a continuously driven heated roller (12) for applying the foil (3) to a base foil strip (2), a device (19) for detecting printed marks on the covering foil and a continuously driven foil transport arrangement. The transport arrangement has two separate transport devices (20,21) before the roller, between which the covering foil is held by force. One transport device (21) facing the roller has a higher transport speed than the other. In normal operation the roller has the same transport speed as the first transport device,