Double-layered fabric for paper making machines having a coarse-structured bottom side and a fine-structured forming side

Abstract From the Canadian patent

Double-layered fabric for paper making machines having a coarse-structure bottom side and a finestructure forming side. Forming fabrics of this kind have a set of warp strands and at least two sets of weft strands which are interwoven at least in a six-shaft repeat, so that a weft strand set on the bottom side constitutes a primary wearing plane and the remaining weft strands or sets of weft strands are arranged on the forming side and may differ from each other in respect of diameter and/or float lengths. Modern, fast and highperformance but more sensitive printing processes require highest-quality paper grades. However, so far the abovementioned quality features could not be optimized for …