Paired warp triple layer forming fabrics with optimum sheet building characteristics

Abstract From the Canadian patent

A papermaker's fabric, usable in the forming section of a paper machine having two layers of cross-machine-direction (CD) yams. Interwoven with the CD yams is a system of MD yams. At least some of the MD yams are grouped into alternating pairs comprising a crossing pair having a first MD yam and a second MD yarn and a second pair having a third MD yarn and a fourth MD yam. The first MD yam and the second MD yam combine to weave each CD yam in the first layer and cross between the first layer and the second layer. The left and right warp yarns in the pairs are aligned in such a way that like adjacent yams from adjacent pairs have MD cell lengths greater than or less than the MD cell …