Importance

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Abstract

A multi-layer papermaker's forming fabric utilizes stitching yarns in the papermaking surface and is formed of repeating units, each of which comprises: a set of top machine direction yarns; a set of bottom machine direction yarns; a set of bottom cross-machine direction yarns interwoven with the set of bottom machine direction yarns; and pairs of first and second stitching yarns extending in the cross machine direction. The first and second stitching yarns of each pair are interwoven with the top and bottom machine direction yarns such that, as a fiber support portion of the first stitching yarn is interweaving with the top machine direction yarns, a binding portion of the second stitching yarn is positioned below the top machine direction yarns, and such that as a fiber support portion of the second stitching yarn is interweaving with the top machine direction yarns, a binding portion of the first binding yarn is positioned below the top machine direction yarns. The first and second stitching yarns cross each other as they pass below a transitional top machine direction yarn. Each of the binding portions of the first and second stitching yarns passes below at least one of the bottom machine direction yarns. The fiber support portions of the stitching yarns and the top machine direction yarns form the papermaking surface.

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First Claim