Patent ID: 6511572
Filing Date: 2003-01-28
Classification: B31B,Y10T

Abstract:
A method of forming cutouts (4) and transverse welding seams (10) in a web of film (5) that is advanced continuously at high velocity, wherein the cutouts (4) constitute areas that are delimited by cutting lines (6,7) with first cutting lines (6) that extend longitudinally of the web of film (5), and second cutting lines (7) that extend transversally of the web of film (5), said cutting lines (7) featuring a number of interruptions (8) that constitute support points whereby the cutouts (4) continue to be coherent with the web of film (5) at the support points (8), and subsequent formation of the transverse welding seams (10) in a web section with low web tension characterized in that the formation of the cutouts (4) is carried out in a web section with high web tension by means of first blade parts for forming the first cutting lines (6) and second blade parts having interruptions for forming the second cutting lines (7) with interruptions.