US2679368A - Wire netting - Google Patents

Description

y 1954 H. AIGNER 2,679,368

WIRE NETTING Filed Dec. 13, 1951 IN V EN TOR. eaee r /4/ ewe/e Patented May 25, 1954 WIRE NETTING Herbert Aigner, Vienna, Austria,

assignor to Hutter & Schrantz Aktiengesellschaft Siebwarenund Filztuch-Fabriken, Vienna, Austria, a firm Application December 13, 1951, Serial No. 261,539 Claims priority, application Austria May 25, 1951 1 Claim. 1

The invention relates to repeatedly twisted wire netting, that is to say, to wire netting with polygonal, for example, hexagonal meshes, in which the netting wires are plaited together by multiple twisting at the points of connection. In the manufacture of such netting, it has hitherto been customary to employ round wire, which produces the disadvantage that the twisted netting wires or meshes are able to turn in the manner of a hinge at the points of connection. Since the wire netting is to be as rigid as possible, this hinging is undesirable and has to be eliminated by special measures. One of these measures consists in that the plaited points are subsequently soldered, which effect is produced automatically by the customary hot galvanizing (dip galvanizing) of the finished netting.

However, the hot galvanizing of the finished netting has the important disadvantage of involving a very high consumption of the very expensive coating material (zinc) since it is not possible sufficiently to strip off the deposit in excess of the necessary layer thickness on the finished netting, especially at the twists.

Where it is desired to dispense with hot galvanizing in order to save material and, for example, to use previously coated (galvanized) wires for manufacturing the netting, or to subject the netting subsequently to a galvanic treatment for applying the coating, without any soldered connection of the plaiting points, the disadvantageous hinge action must be precluded by other measures in order to obtain the desired fixation of the plaited points for the purpose of stiifening the piece of netting.

For this purpose the invention provides a particularly advantageous and economic solution, residing in that the wire netting comprises wires connected to adjacent wires by multiple twisting and being of flattened, e. g., rectangular cross section.

By reason of the flattened or angular cross section of the wires, said wires interconnected by multiple twisting form helical surfaces, which interlock to resist a relative turning of said wires without deformation thereof.

The fixation of the plaited points is thus obtained by purely mechanical means without any ,need of modifying the twisting methods or twisting machines hitherto employed. It is of particular importance in this connection that this method of fixing operates completely independently of the manner in which the surface treatment of the wires of the netting or of the netting itself is carried out, since the necessary locking efiect is produced in all cases by the particular shaping of the wires. Therefore, it is possible to use either base iron wires or iron wires which have been provided with a coating of the desired thickness before the twisting already, or the netting may be treated when finished, after the twisting (galvanic zinc plating). However, it is also possible to use wires of a material resisting corrosion, in which case any further aftertreatment can be dispensed with. With such wires, consisting, e. g., of aluminum and its alloys, flat rolling produces a desirable cold-hardening of the material.

In any case there will always be obtained a netting which as regards rigidity is at least equivalent to the hot-galvanized netting.

The invention will now be described with reference to an embodiment illustrated in the accompanying drawings, in which Fig. 1 shows a portion of a wire netting with the usual hexagonal meshes, and

Fig. 2 shows one of the twisted joints to a larger scale.

In the netting shown in Fig. 1, the wires 1, 2 of the netting are of flattened cross section throughout their length and are twisted together along stretches evenly distributed over their length, e. g., at 3 and twisted together with the adjacent wires 5 and 6, respectively, at i. Fig. 2 shows one of the twisted joints 3. It will be seen clearly from this figure how, with the wires I, 2 intertwisted several times and due to the flattening thereof, the aforementioned helical surfaces are produced which prevent a turning of the wires out of the plane of the drawing.

It is apparent that the invention is not restricted in any way to the form of netting represented in the drawings but may be used with equal success wherever the connection (plaiting) of the wires by a repeated twisting thereof is produced.

I claim:

A wire netting comprising adjacent wires which are of flattened cross-section throughout their length and tightly twisted together along longitudinally spaced apart stretches evenly distributed along their length to provide non-hinging, rigid joints at said twisted together stretches.

References Cited in the file of this patent UNITED STATES PATENTS Number Name Date 390,220 Frederick Oct. 2, 1388 514,671 Curtis Feb. 13, 1894 727,004 Shuman May 5, 1903 978,028 Kaspar Dec. 6, 1910 2,624,375 Schulze Jan. 6, 1953 FOREIGN PATENTS Number Country Date 1,205 Great Britain Nov. 18, 1893 58,952 Denmark July 18, 1938

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