Textiles: knitting – United needle machines – Straight
Patent
1995-09-05
1997-08-26
Calvert, John J.
Textiles: knitting
United needle machines
Straight
66214, D04B 2110, D04B 2114, D04B 2310, D04B 3500
Patent
active
056600623
DESCRIPTION:
BRIEF SUMMARY
The invention is directed to a process and a device for the production of textile net-like fabrics by various bonding processes, e.g., the warp knitting process or stitch bonding process.
In the textile industry, nets are commonly manufactured with known net-tying machines or net-knotting machines by means of knotting hooks or with known warp knitting machines or stitch bonding machines by means of latch needles or slide needles. In so doing, it is disadvantageous that the product width is determined by the working width and by the mesh structure and that the variability of structure is sharply restricted by the processes or can only be realized at a high cost as is the case in warp-knitted net with a varied net mesh size in the edge region requiring the use of a plurality of guide bars and varied lapping or threading (JP 51-57041). The usability of the products is limited due to the bunching of yarns in the knot region and because of the resulting sensitivity to abrasion and their limited variability with respect to structure.
A modified warp knitting machine is known (DE 2706930) for working plastic yarns with parallel weft insertion in which the yarns are bonded by means of fusing swords. The product width which can be produced in this way only corresponds to the working width of the machine. The net mesh geometry is determined by the fixed working width and the arrangement of the bonding elements, i.e., the fusing swords. Further, only thermoplastic materials can be processed by the selected bonding method so that the range of possible applications of the product is limited.
Stitch bonding machines on which square-mesh nets can be manufactured are also known (DD 269298). For this purpose, parallel weft yarns are entered transversely to the working direction and are passed through in the work location at determined intervals transversely to the working direction by working members forming wale portions and are tied on or tied in by means of stitching yarns looping around the warp yarns.
It is disadvantageous that only square-mesh nets with continuous weft yarns and warp yarns can be realized and that the size of the mesh apertures which is determined by the distance between the inserted weft yarns and the relative distance between the working members forming the wales can only be changed to a limited extent and in an uneconomical manner. Further, the maximum product width is equal to the working width and the products have low strength due to the fact that the weft yarns pattern is also tacked by bearded needles not participating in mesh formation.
The object of the present invention is to provide a process and a device for carrying out the process by various bonding processes, e.g., the warp knitting process or stitch bonding process, for producing textile net-like fabrics with large mesh widths, a high variability of structure, and product widths extending beyond the working width.
This object is met, according to the invention, by the characterizing part of the patent claims. Advantageous constructions, are disclosed in the dependent claims.
The solution according to the invention is explained more fully in the following with reference to an embodiment example.
FIG. 1 shows a schematic view of the following process steps: production of groups of mesh side yarns, joining of a function yarn with a group of mesh side yarns, and guiding out of the function thread;
FIG. 2 shows a schematic view of the following process steps: formation of a function yarn reserve and joining with a group of mesh side yarns;
FIG. 3 shows a schematic view of the process step for achieving the initial position;
FIG. 4 shows a stitch-bonded net-like textile fabric in the production position;
FIG. 5 shows a stitch-bonded net-like textile fabric in the use position;
FIG. 6 shows a warp-knitted net-like textile fabric in the production position;
FIG. 7 shows a warp-knitted net-like fabric in the use position;
FIG. 8 shows a stitch bonding work location;
FIG. 9 shows a system for forming a yarn reserve;
FIG. 10 shows a warp knitti
REFERENCES:
patent: 3013419 (1961-12-01), MacCaffray, Jr.
patent: 3140592 (1964-07-01), Clark
patent: 3428007 (1969-02-01), Wignall et al.
patent: 4417456 (1983-11-01), Bergmann et al.
patent: 4433493 (1984-02-01), Poisson
Hans Lehner, Looking at the Position for Warp Knitting in Relation to the Technical Textiles Market, pp. 38 and 39.
Diestel Olaf
Franzke Gerd
Offermann Peter
Schinkoreit Wolfram
Calvert John J.
Textilma AG
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