Patent ID: 7654289
Filing Date: 2010-02-02
Classification: D21F

Abstract:
1. A double layer forming fabric for a papermaking machine woven to an overall repeating weave pattern and comprising a paper side layer and a machine side layer, wherein the fabric has (i) at least one set of paper side layer weft yarns; (ii) at least one set of machine side layer weft yarns; and (iii) a set of warp yarns comprising only pairs of binder warp yarns interwoven with the sets of weft yarns, each pair comprising a first and second member, wherein (a) in the paper side surface, each pair of binder warp yarns occupies a single combined path comprising at least a first and second segment, wherein the first and second members of the pair exchange positions at an exchange point between each successive segment and are laterally displaced in relation to each other at and between each exchange point; and (b) for each successive pair, an order of insertion of the first and second members in relation to each other into the overall repeating weave pattern is inverted in relation to an order of insertion of the first and second members of an immediately preceding pair, such that in the woven fabric for each exchange point, (i) each first member is adjacent to a first member of a first adjacent pair at the closest exchange point for the first adjacent pair, and (ii) each second member is adjacent to a second member of a second adjacent pair at the closest exchange point for the second adjacent pair.