Title of Invention

MESH FABRIC

Abstract The invention relates to a wide-meshed fabric (1) treated with bonding agents. The inventive mesh is made up of bundles (4) consisting of several warop threads (3) and bundloes (6) consisting of several weft threads (5) surrounding the inner meshes (7). The warp threads (3) are interwoven with the weft threads (5) at intersection points (5) of the bundles (4) of warp threads and bundles (6) of weft threads (5) running at right-angles to each other. In order to firmly secure the warp threads and the weft threads, the bundles (4) of warp threads are divided into a first group (4') of warp threads and a second group (4") of warp threads and the first group of warp threads crosses over the second group of warp threads belonging to the same bundle (4) of warp threads for each mesh (7) thereby forming a half-twist. Similarly, the warp threads (3) of both groups (4',4") of warp threads are interwoven with the weft threads (5), running substantially parallel to each other. Mesh fabrics of the above-mentioned kind can be used to reinforce ground surfaces, road surfaces, layers of mortar and the like, in addition to use in poultry farming and use as fishing nets.
Full Text The invention relates to a wide-mesh grid fabric treated with bonding agents according to the features of the invention.
Grid fabrics of that kind, which are used in particular for reinforcing bitumen-bound road surfaces or for reinforcing cement- or gypsum-bound layers of mortar, plasters or the like or as geogrids for reinforcing ground surfaces, are known from German laid-open applications (DE-OS) Nos. 20 00 937; 31 20 661; 31 36 026 and 41 23 055. As DE-OS 195 30 541 shows, these grids are also used as ground grids for raising chickens. Also these grids may be used as fishing nets.
The warp threads and the weft threads preferably comprise multifilament synthetic yarns of high tensile strength, in particular aramid, polyester or the like. It is also possible to use glass filament yarns.
Depending on the respective purpose of use involved, the bonding agent which encloses the warp thread bundles, the weft thread bundles and the intersections thereof and thereby fixes the grid fabric and protects it from chemical and mechanical loadings can be a PVC plastisol, a latex dispersion or dispersions of bitumen, acrylates or suitable soft plastic materials or mixtures thereof.
Wide-mesh grid fabrics are very loose prior to impregnation or enclosure with a bonding agent so that the warp threads and the weft threads can be easily displaced unless particular steps are taken in that respect. Interweaving of the warp threads with the weft threads is not sufficient to achieve sufficient stability for the wide-mesh grid fabric. In order for the warp threads of a warp thread
bundle and also the weft threads of a weft thread bundle to be held together, the known grid fabrics provide that associated with each warp thread bundle is at least one thin doup thread which is passed in a zig-zag configuration over the parallel warp threads of a warp thread bundle and extends at the sides of the warp thread bundle under a respective weft thread bundle. These doup threads, which can be in the form of a half-doup thread or a full-doup thread, are only intended to perform the function of holding the warp threads of the warp thread bundle and the weft threads of the weft thread bundle together until the grid fabric is impregnated and/or encased with a bonding agent.
US patent 5,965,467 discloses grid fabrics in which the mutually juxtaposed warp threads of a warp thread bundle are divided into two groups. In a first embodiment according to Figures 1 and 2 of US patent 5,965,467, one group is formed by the odd-numbered threads and the other group by the even-numbered threads. Each thread of a group crosses an adjacent thread from the other group at the point of intersection between warp and weft thread bundles twice, namely once at the beginning of the intersection in the region of the first weft thread and once at the end of the intersection in the region of the last weft thread. In the embodiment according to Fig. 3 of this document, only the two outwardly arranged pairs of adjacent weft threads cross each other at the beginning and at the end of each intersection. In these two embodiments, the warp threads extend parallel to each other and do not cross each other in the region between two weft thread bundles.
In the embodiments according to Figs. 3a and 3b of this document, only the two outwardsly arranged pairs of adjacent warp threads cross each other between two weft thread bundles. The other warp threads extend parallel to each other and do not cross each other. In the embodiment according to Fig. 3b, the adjacent individual warp threads of the two outwardly arranged warp thread pairs, also cross each other between the individual weft threads in the region of the intersection of warp and weft thread bundles. Figures 4 and 5 of this document, finally, show one or two simple doup threads which cross the entirety of the warp threads extending parallel of a warp thread bundle between two intersections of the warp and weft thread bundles.
The object of the invention is to provide a grid fabric in which the fixing which is achieved by a weave procedure is stronger than in the known grid fabrics and in which stronger intermeshing with the ground surface to be reinforced or the layer to be reinforced is achieved by the warp threads of the warp thread bundle being more closely held together.
In accordance with the invention, that object is attained by the features of the invention in conjunction with the features of its preamble.
The fact that a group of warp threads of a warp thread bundle crosses the other group of said bundle for each mesh and the load-bearing warp threads are interwoven with the weft threads in closely mutually juxtaposed relationship produces a very stable grid fabric in which neither the warp threads nor the weft threads can be displaced. In that case there is no need for an additional doup thread. This configuration further provides that the thickness of the warp thread bundles is twice that of the warp threads and - viewed in plan-the warp thread
bundles are on average about 50% narrower than in the case of warp threads which extend parallel. That property and the fact that the warp thread bundles and weft thread bundles are held together more firmly at the intersections provides in the case of geogrids better intermeshing with the ground layers to be stabilized or reinforced. As also the internal cross-section of the meshes is also increased the separation effect which is unwanted particularly in the case of geomeshes is reduced.
In a preferred embodiment of the invention weaving at the intersections of the warp thread bundles to the weft thread bundles is effected in such a way that a first group of the weft threads of a weft thread bundle extends over the warp threads of the first warp thread group and under the warp threads of the second warp thread group and a second group of the weft threads of a weft thread bundle extends under the warp threads of the first warp thread group and over the warp threads of the second warp thread group. In that respect it is desirable that, of the mutually juxtaposed weft threads of a weft thread bundle, a weft thread extends alternately over a warp thread group and the respectively adjacent weft thread extends under said warp thread group.
An embodiment of the invention is described in greater detail in the description hereinafter with reference to the drawings in which:
Figure 1 shows a plan view of the mesh fabric according to the invention, and Figure 2 is a view on an enlarged scale of the mutually crossing groups of a warp thread bundle and the intersection of the warp threads with the weft threads.
As Figure 1 shows the mesh fabric is formed from warp thread bundles 4 which comprise for example eight warp threads 3 and weft thread bundles 6 which comprise eight weft threads 5. The weft thread bundles 6 and the warp thread bundles 4 each surround a respective internal mesh 7. The warp thread bundles 4 are divided into a first warp thread group 4' and a second warp thread group 4". Those two warp thread groups 4' and 4" are interwoven to the weft threads 5 of the weft thread bundles 6 at the intersections 8, extending in substantially mutually parallel relationship. Between two weft thread bundles 6, that is to say for each mesh 7, a warp thread group 4' respectively crosses over the other warp thread group 4" of a warp thread bundle 4.
In this embodiment the interweaving at the intersections 8 is effected in such a way that a first group 6' of the weft threads 5 of a weft thread bundle 6 extends over the warp threads 3 of the first warp thread group 4' and under the warp threads 3 of the second warp thread group 4" and a second group 6" of the weft threads 5 of a weft thread bundle 6 extends under the warp threads 3 of the first warp thread group 4' and over the warp threads 3 of the second warp thread group 4".
This kind of interweaving is particularly apparent from the enlarged view in Figure 2. It can be seen therefrom that-counting from the bottom-each odd-numbered weft thread 5 extends over the first warp thread group 4' and then under the warp thread group 4" of the warp thread bundle 4 while each even-numbered weft thread 5 extends under the first warp thread group 4' and then over the second warp thread group 4" of the warp thread bundle.
WE CLAIM:
1. A wide-mesh grid fabric (1) treated with bonding agents, having
warp thread bundles (4) comprising a plurality of warp threads (3), and
weft thread bundles (6) comprising a plurality of weft threads (5), wherein
the warp thread bundles (4) and the weft thread bundles (6) surround internal meshes (7) of the grid fabric (1),
the warp thread bundles (4) are divided into a first warp thread group (4') and a second warp thread group (4") and
the warp threads (3) of both warp thread groups (4',4") extending essentially parallel to each other are interwoven with the weft threads (5) at the intersections (8) of the warp thread bundles (4) and weft thread bundles (6) extending at a right angle to each other,
characterized in that
said two warp thread groups (4',4") cross over the respective other warp thread group (4",40 of a warp thread bundle (4) between two weft thread bundles (6), i.e. for each mesh (7), in the manner of a half-doup thread.
2. Grid fabric as claimed in claim 1, wherein a first group (60 of the weft threads (5) of a weft thread bundle (6) extends over the warp threads (3) of the first warp thread group (4) and under the warp threads (3) of the second warp thread group (4") and a second group (6") of the weft threads (5) of a weft thread bundle (6) extends under the warp threads (3) of the first warp thread group (40 and over the warp threads (3) of the second warp thread group (4").
3. Grid fabric as claimed in claim 2, wherein each odd-numbered weft thread (5) of a weft thread bundle (6) belongs to the first group (60 and each even-numbered weft thread (5) belongs to the second group (6") of the weft threads (5) of a weft thread bundle (6).
Dated This 30th day of May 2002


The invention relates to a wide-meshed fabric (1) treated with bonding agents. The inventive mesh is made up of bundles (4) consisting of several warop threads (3) and bundloes (6) consisting of several weft threads (5) surrounding the inner meshes (7). The warp threads (3) are interwoven with the weft threads (5) at intersection points (5) of the bundles (4) of warp threads and bundles (6) of weft threads (5) running at right-angles to each other. In order to firmly secure the warp threads and the weft threads, the bundles (4) of warp threads are divided into a first group (4') of warp threads and a second group (4") of warp threads and the first group of warp threads crosses over the second group of warp threads belonging to the same bundle (4) of warp threads for each mesh (7) thereby forming a half-twist. Similarly, the warp threads (3) of both groups (4',4") of warp threads are interwoven with the weft threads (5), running substantially parallel to each other. Mesh fabrics of the above-mentioned kind can be used to reinforce ground surfaces, road surfaces, layers of mortar and the like, in addition to use in poultry farming and use as fishing nets.

Documents:

in-pct-2002-735-kol-correspondence.pdf

in-pct-2002-735-kol-examination report.pdf

in-pct-2002-735-kol-form 13.pdf

in-pct-2002-735-kol-form 18.pdf

in-pct-2002-735-kol-form 26.pdf

in-pct-2002-735-kol-form 3.pdf

in-pct-2002-735-kol-form 5.pdf

in-pct-2002-735-kol-form 6.pdf

IN-PCT-2002-735-KOL-FORM-27.pdf

in-pct-2002-735-kol-granted-abstract.pdf

in-pct-2002-735-kol-granted-claims.pdf

in-pct-2002-735-kol-granted-description (complete).pdf

in-pct-2002-735-kol-granted-drawings.pdf

in-pct-2002-735-kol-granted-form 1.pdf

in-pct-2002-735-kol-granted-form 2.pdf

in-pct-2002-735-kol-granted-specification.pdf

in-pct-2002-735-kol-others.pdf

in-pct-2002-735-kol-reply to examination report.pdf

in-pct-2002-735-kol-translated copy of priority document.pdf


Patent Number 244348
Indian Patent Application Number IN/PCT/2002/735/KOL
PG Journal Number 49/2010
Publication Date 03-Dec-2010
Grant Date 02-Dec-2010
Date of Filing 30-May-2002
Name of Patentee HUESKER SYNTHETIC GMBH
Applicant Address FABRIKSTRASSE 13-15, 48712, GESCHER
Inventors:
# Inventor's Name Inventor's Address
1 PINTZ, HEIKO SIEGERLANDSTRASSE 20, 48527 NORDHORN
2 BULT, HERMANN HUMMERSKAMP 1, 48712, GESCHER
PCT International Classification Number D03D 9/00
PCT International Application Number PCT/EP2001/10451
PCT International Filing date 2000-10-24
PCT Conventions:
# PCT Application Number Date of Convention Priority Country
1 199 62 441.0 1999-12-22 Germany