B - Operations – Transporting – 29 – C
Patent
B - Operations, Transporting
29
C
B29C 53/26 (2006.01) B29C 53/24 (2006.01) B31F 1/26 (2006.01)
Patent
CA 2299088
The method for the shaping of strip-like films (2), comprises the following steps: a) A film strip (2) is continuously forwarded from a film supply to shaping units, b) The film strip (2) is pleated in a first shaping unit (11). In this, edges (21, 22) are produced which form an angle of inclination to the edges (36) of the film strip having a constant value. c) After a forwarding of the pleated strip (2') to at least one further shaping unit (12) the former is reshaped in one or more steps. In this the edges (21, 22) are eliminated through plastic deformation by means of a roller pair (120) in edge zones (30b) outside of a middle zone (30a) of the strip and are at the same time replaced by curved edges (31, 32). The angles of inclination of the curved edges continuously increase from the middle zone to the strip edges.
Fetherstonhaugh & Co.
Sulzer Chemtech Ag
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