Papermakers fabric having stacked machine direction yarns
AssigneeAsten Group, Inc.
InventorsErnst Schroder, Henry J. Lee
Life of this patent
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Abstract
A papermakers fabric having a system of monofilament machine direction yarns (hereinafter MD yarns) which control the permeability of the fabric. The present weave provides for usage of high aspect ratio yarns as structural weave components. The system of MD yarns comprises multiple layers of yarns which are vertically stacked. Preferably, upper MD yarns define floats on the upper surface of the fabric and each upper MD yarn is grouped in a vertically stacked orientation with an intermediate and a lower MD yarn.
Claims20
A woven papermakers fabric of the type having a paper side which is in contact with a paper sheet and a machine side which is in contact with machine rollers, the woven fabric being comprised of:
- a first system of longitudinal, monofilament machine direction yarns that dominate the paper side of the fabric;
- an intermediate system of longitudinal, monofilament machine direction yarns that do not appear on either the paper side or the machine side of the fabric;
- a second system of longitudinal, monofilament machine direction yarns that dominate the machine side of the fabric;
- and
- a multilayer system of cross machine direction yarns, the yarns of the first, intermediate and second systems are arranged in vertically stacked groups of first, intermediate and second machine direction yarns positioned one above the other in a superimposed relationship and are interwoven with the yarns of the cross machine direction system in a repeated pattern that maintains the stacked relationship of the yarns such that the yarns of the first system do not pass to the machine side of the fabric, the yarns of the second system do not pass to the paper side of the fabric and the yarns of the intermediate system do not pass to either the paper or the machine side of the fabric and the intermediate yarns are interlaced with the cross machine direction yarns of at least two layers of said multilayer system.
A papermakers fabric comprising:
- a system of CMD yarns including at least upper and lower layers of CMD yarns;
- a system of flat monofilament MD yarns interwoven with said CMD yarns in a selected repeat pattern;
- said MD yarns system having paired upper and lower yarns that are stacked in the same relative vertical alignment to each other throughout the body of the fabric;
- and
- said MD yarn system including at least one subsystem of intermediate MD yarns disposed between said upper and lower MD yarns such that at least one intermediate MD yarn is in vertical stacked alignment with each stacked pair of upper and lower MD yarns.
A papermakers fabric having a multilayer system of CMD yarns and a system of flat monofilament MD yarns interwoven with said CMD yarns in a selected repeat pattern, wherein the MD yarn system is comprised of a paired upper and lower yarns stacked in the same relative vertical wherein said MD yarn system includes at least one intermediate subsystem of MD yarns disposed between said upper and lower MD yarns which interweaves with at least two layers of CMD yarns, and wherein the upper MD yarns and the lower MD yarns impart different surface characteristics to the opposing sides of the fabric by dominating both of the opposing sides.
An industrial fabric comprising:
- a system of CMD yarns;
- a system of flat monofilament MD yarns interwoven with said CMD yarns in a selected repeat pattern;
- said MD yarns system having paired upper and lower yarns that are stacked in the same relative vertical alignment to each other throughout the body of the fabric;
- and
- said MD yarn system including at least one intermediate MD yarn disposed between said upper and lower MD yarns of each said MD yarn pairs which interweaves with at least two layers of CMD yarns.
A woven papermakers fabric of the type having a paper side which is in contact with a paper sheet and a machine side which is in contact with machine rollers, the woven fabric being comprised of:
- a first system of longitudinal, monofilament flat machine direction yarns that dominate the paper side of the fabric;
- a second system of longitudinal, monofilament flat machine direction yarns that dominate the machine side of the fabric;
- an intermediate system of longitudinal, monofilament flat machine direction yarns;
- a system of round cross machine direction yarns;
- said system of round cross machine direction yarns including multiple layers;
- and
- yarns of the first, intermediate and second systems arranged in vertically stacked groups of first, intermediate and second machine direction yarns positioned one above the other in a superimposed relationship and being interwoven with the yarns of the cross machine direction system in a repeated pattern such that the intermediate yarns are interlaced with cross machine direction yarns of at least of two of said multilayers of cross machine direction yarns and do not appear on either the paper side or the machine side of the fabric.
Dependencies are inferred from the claim text.