Patent ID: 7967033

Claim:
A papermaker's fabric comprising at least one system of warp yarns interwoven with at least first and second systems of weft yarns, the weft yarns of the first system of weft yarns having a vertical dimension that is greater than a vertical dimension of the weft yarns of the second system, the fabric having a papermaking surface and a machine side surface, wherein in the papermaking surface: a) the yarns of the first system of weft yarns are interwoven with the warp yarns to provide groups of four weft yarn floats which form four corners of a box shape on the papermaking surface; b) the yarns of the second system of weft yarns are interwoven with the warp yarns so as to pass through the bottom of the box shape, and further provide support areas in pockets located adjacent to the box shapes; c) at least one yarn from the second system of weft yarns interweaves with the warp yarns to occupy space in a center plane of the fabric so as to restrict or retard drainage and thereby increase a center plane resistance of the fabric.