Importance

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Abstract

A machine side layer weave design for use in woven composite fabrics, particularly papermakers forming fabrics having differing weave designs on each planar surface is provided. The composite fabric is comprised of two sets of weft yarns interwoven with at least one system of warp yarns. A first set of weft yarns is interwoven with the at least one system of warp yarns to form the paper side layer, while the second set of weft yarns is interwoven with the at least one system of warp yarns to form the machine side layer. In each repeat of the machine side layer weave design, at least 50% of the warp yarns pass under two adjacent weft yarns on the machine side of the fabric to form a double warp knuckle, and each double warp knuckle is bounded on either side by a single warp knuckle formed on each of the first and second weft passed under by the double warp knuckle. Further, in each repeat of the weave, each weft yarn is passed under by two adjacent warp yarns to form two adjacent single warp knuckles. In one embodiment, all of the warp yarns form double warp knuckles; in an alternate embodiment, 50% of the warp yarns form double warp knuckles. The knuckles are evenly distributed across the machine side surface so as to minimize any propensity for guiding. The machine side layer weave design of the invention is suitable for use in any composite fabric and is effective in minimizing or eliminating fabric edge curl, a problem common in fabrics of this type.

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First Claim