Papermaker's forming fabric with cross-direction yarn stitching and ratio of top machined direction yarns to bottom machine direction yarns of less than 1
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United States of America Patent
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Feb 10, 2009
Grant Date -
Jul 31, 2008
app pub date -
Jan 31, 2007
filing date -
Jan 31, 2007
priority date (Note) -
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Abstract
A triple layer papermaker's fabric includes: a set of top MD yarns; a set of top CMD yarns interwoven with the top MD yarns to form a top fabric layer; a set of bottom MD yarns; a set of bottom CMD yarns interwoven with the bottom MD yarns to form a bottom fabric layer; and a set of stitching yarn pairs that interweave with the top MD yarns, wherein at least one of the yarns of each stitching yarn pair interweaves with the bottom MD yarns. The top MD yarns and the top CMD yarns are interwoven in a series of repeat units and the bottom MD yarns and the bottom CMD yarns are interwoven in a series of corresponding repeat units. The set of top MD yarns comprises a first number of top MD yarns in each repeat unit, and the set of bottom MD yarns comprises a second number of bottom MD yarns in each repeat unit, wherein the second number being greater than the first number. Each bottom MD yarn follows a different interweaving pattern than that followed by each of its two immediate neighboring bottom MD yarns.
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