Papermaker's forming fabric with cross-direction yarn stitching and ratio of top machine direction yarns to bottom machine direction yarns of 2:3
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United States of America Patent
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Sep 1, 2009
Grant Date -
Nov 1, 2007
app pub date -
Apr 28, 2006
filing date -
Apr 28, 2006
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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, and the ratio between the first number and the second number is 2:3. In this configuration, a fabric may have enhanced properties, including higher top surface open area, higher permeability, and improved fabric stability.
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