| 摘要 |
A machine for obtaining a packaging tubular web (8) from a film (3) comprises: unwinding means (5) for unwinding said film (3) from a first reel (4); operating means (10, 12, 14, 16, 17) for processing said film (3) such as to obtain said packaging tubular web (8); winding means (3i) for winding said packaging tubular web (8) on a second reel (30); sensor means (35, 37, 39) for detecting the tension of said film (3) and/or of said packaging tubular web (8); and control means (36) cooperating with said sensor means (35, 37, 39) to control the tension of said film (3) and/or of said packaging tubular web (8) in function of unwinding parameters of said film (3) and/or winding parameters of said packaging tubular web (8). |
