Apparatus for stretching extruded films

摘要

The apparatus (10) for stretching an extruded film (14) comprises opposing pairs of guide rollers (20-42), the outsides of which are designed in such a way that the friction in the conveying direction is less than the friction transversely to the conveying direction, so that the edges (16, 18) of the clamped-in film (14) are conveyed until maximum stretching in the clamped-in state by the pairs of guide rollers. The pairs of guide rollers (20-42) are designed with annular grooves and annular ribs on the outside, preferably alternately, the outside of one guide roller being designed such that it is complementary to the outside of the opposing guide roller. <IMAGE>