Patent ID: 8752292
Filing Date: 2014-06-17
Classification: B01D,B01J,B21D,B30B,D06F,Y10T

Abstract:
1. A method for producing a structured material web from a web material, wherein the method comprises the following steps: providing a web material, forming holes in the web material, executing a primary structuring process where a three-dimensional structuring of the web material is formed comprising beads or folds as well as structures formed in a surface portion which is enclosed by the beads or the folds, namely troughs that are enclosed by the folds in the case of a vault structure and spherical caps that are enclosed by the beads in the case of a three-dimensional wave-shaped structure, and executing a secondary structuring process where a three-dimensional facet-shaped structuring of the web material with spatially arranged plane or only slightly curved facet surfaces is formed in the enclosed surfaces portions by acting with pressure upon the troughs or spherical caps on their convex side and pressing the troughs or spherical caps on their concave side against supporting elements which converge to a star point whereby the troughs or spherical caps are pressed in between the supporting elements, wherein one of the holes in each case is arranged at a distinguished location, namely the lowest location, in each of the structures formed as facet surfaces in the enclosed surface portions, and wherein the enclosed surface portion at every other location of the surface portion is formed with an inclination towards the distinguished location.