A multi-layer papermaker's forming fabric has stitching yarns integrated
into the papermaking surface. Each of a plurality of repeating units of
the fabric comprises: a set of top machine direction yarns; a set of top
cross-machine direction yarns interwoven with the top machine direction
yarns; a set of bottom machine direction yarns; a set of bottom
cross-machine direction yarns interwoven with the bottom machine
direction yarns; and pairs of first and second stitching yarns. The
stitching yarns pairs are positioned between pairs of top cross-machine
direction yarns. The 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 stitching
yarn is positioned below the top machine direction yarns. The first and
second stitching yarns cross each other as they pass below a traditional
top machine direction yarn. Also, each of the binding portions of the
first and second stitching yarns passes below at least one of the bottom
machine direction yarns. In this configuration, the stitching yarns are
completely integrated into the top, or papermaking, surface of the
fabric, and therefore do not adversely impact the papermaking qualities
of the fabric.