Patent ID: 6416452
Filing Date: 2002-07-09
Classification: B31B,Y10S

Abstract:
A method of making multiwall plastic bags comprising the steps of:(a) unwinding a plurality of double-layer substantially half-width foil webs from respective rolls and guiding the unwound double-layer substantially half-width foil webs along initial segments of a path; (b) splitting a wall of each of said half-width foil webs and unfolding the double-layer substantially half-width foil webs along said initial segments into substantially full-width single-layer webs so that outer edges of said single-layer webs correspond to edges formed on splitting the half-width foil webs; (c) superimposing one of said substantially full-width single-layer webs on at least one other of said substantially full-width single-layer webs coextensively to form a multilayer full-width web along a subsequent segment of said path; (d) folding said multilayer full-width web generally in a U shape along a further segment of said path to form a folded multilayer web; and (e) forming bags in said folded multilayer web.