MACHINE AND METHOD FOR FORMING TUBES BY HELICAL WINDING OF STRIPS OF WEB MATERIAL

摘要

The invention relates to a machine for producing tubular articles (T) by helical winding of strips of web material, comprising a spindle (4) and a winding member (7) to helically wind the strips (S1, S2) of web material around the spindle. To improve adhesion between strips pressure is applied to the overlapping turns of strips of web material by an ultrasonic generator (33).