Patent ID: 7108020

Claim:
A composite forming fabric having a paper side layer and a machine side layer, which comprises: (i) a first set of paper side layer weft yarns, (ii) a second set of machine side layer weft yarns which are larger than the paper side layer weft yarns, and (iii) a set of triplet warp yarns which contribute to the structure of both the paper side layer and the machine side layer, which three sets of yarns are woven together according to a repeating pattern wherein: (a) each member of each triplet set of warp yarns interweaves with the paper side layer weft yarns to occupy in sequence segments of a single unbroken warp path in the paper side layer; (b) the sequence of segments repeats as part of the repeating pattern; (c) each segment in the unbroken warp path is separated next segment by at least one paper side layer weft yarn; (d) each member of each triplet interlaces separately with a single machine side layer weft yarn at least once within the pattern repeat; (e) within the fabric repeating pattern the number of machine side layer weft yarns between each interlacing point of successive yarns from each triplet of warp yarns is constant; and (f) within the fabric repeating pattern the path lengths of each member of each triplet set is the same.