Note: Descriptions are shown in the official language in which they were submitted.
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BACKGROUN~ OF THE INVENTION
Fleld of the Inventton
Thls lnvent10n relates to the field of woven fabrtc, and more
partlcularly to the field of fabrics woven at least partTally from metai
; 5 wire and includlng areas of double layer fabric.
Descriptlon of the Prlor Art
Tubular metal fabrlc Is well-known in the art, but slnce the
conventlonal fabr7c consists of a slngle tube formed of the entire
double layer width of the fabrlc, the slze of the tube Is llmlted to the
wldth of the fabrlc and cannot be reduced wlthout destroylng the tube.
It Is often necessary to produce Irregular shaped double layer fabrlc
for use In fllters and the ITke. Thts cannot be done easily with the
slngle tubular fabric of the prlor art.
SUMMARY OF THE INVENTION
Therefore, It Is an obJect of the present invention to provlde
a double layer metalllc fabrlc whTch can be cut to a varlety of shapes
wlthout destroylng the tubular structure of the fabric.
It Is a further obJect of the present invention to provide a
fabrlc which consists of a plurallty of double layered areas separated
by areas of a slngle comblned weave layer.
It Is a stlll further obJect of the present Inventlon to
provtde a fabrlc composed of a plurallty of tubular areas alternatlng
wlth areas of a slngle comblned weave layer, In whlch the areas alternate
` in elther the warp or the weft dlrectlon.
, 25 The present Inventlon fulfllls the above obJects and overcomes
the llmitatlons of the prlor art by provldlng a metallic fabrlc whlch Is
alternately double and slngle woven to provlde areas of double and
slngle comblned layer. These areas may be alternated In elther the
warp or the weft dlrectlon, or both. The fabrlc thus formed may Include
, 30 a plurallty of tubular areas separated by single layer strlps, or a
pattern of sealed pocket shaped areas surrounded on all sldes by slngle
layered areas, or connected crosslng tubular areas surroundlng slngle
layered squares.
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The sizes of the double and single layered arsas may be selected
independently of the width of the cloth. When desired, the fabric can
be cut along the single layered areas in order to produce mater7al of
complex shapes or even a single tube of fabrlc.
Addlttonally, the upper and lower walls of the tubes can be
~ven of different materials, for example, wires of different metals.
The single layered areas are formed of a combination of the two materlals.
If the fabric is formed of materials of dlfferent elastlcity, one or
both of the cell walls wlll be convexly curved in the final product.
The fabrlc accordlng to the present Inventlon has numerous
posslble uses. In fllter technology, flexible fllter hoses formed of the
woven tubular fabric are more reslstant to mechanlcal stresses such as
the vlbratlons Imposed In cleanlng the fllters than fllter hoses of the
prlor art havlng welded seams. The above-descrlbed fabrlc havlng convexly
curved tube walls can be used as a fllterlng materlal or as a porous
contalner for other materlals. In accumulators, the active mass, for
example, cadmlum powder In nlckel- admlum batterles, can be enclosed In
the tubular areas of the fabrlc. Thls wlll result In a great reductlon
of prlce, slnce the fabrlc of the present Inventlon can be produced much
more cheaply than the perforated sheet metal presently used.
` E~IEF DESCRIPTION OF THE DRAWINGS
.
The Inventlon wlll now be descrlbed In detall wlth reference to
the accompanylng drawlngs, In whlch:
Ftgure I Is a schematlc cross-sectlonal vlew of the fabrlc
accordlng to the present Inventlon;
Flgure 2 Is a weavlng dlagram for the productlon of tubular
- fabrlc with the tubes extendlng In the warp dlrectlon;
Flgure 3 Is a weavlng dlagram for the productlon of the
comblned slngle layered area extendlng in the weft dtrectlon; and
Flgure 4 Is a weavlng dlagram for the productlon of the double
Iayer areas extendlng In the weft dlrectlon.
DESCRIPTION OF THE PREFERRED EMBODIMENTS
Referrlng to Flgure 1, the fabrlc of the present Inventlon Includes
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alternating areas of slngle weavlng formlng a combined slngle layer
I and areas of double weavlng formTng a double layer area 2. The change
in weaving can be effected In etther the warp or the weft directlon,
causlng the production of tubular cells extending In the warp or weft
dlrection. FabrTc formed of tubes extending In the weft dlrectlon can
be more easily rolled up than fabrlc formed of tubes extending In the
warp dlrectlon. If the weavlng alternates In both the warp and the weft
dlrecttons, elther pocket shaped cells closed on all sides by combined
slngle layer strlps, or squares of slngle layered materlal surrounded
by connected crosslng tubes, are formed.
For produclng the above-described fabric, at least five
weaving shafts are necessary. For the followlng examples, ~Ight shafts
are used. The wlthdrawal of the warp wires Is always made In numerlcal
sequence 1-8.
In order to form a fabrlc Includlng tubes runnlng In the warp
dlrectlon, the weavlng process can be executed wlth the shafts In the
; sequence of posltlons shown in Flgure 2. The upper layer of the tubular
sectlon Is formed by a four shaft twlll, and the bottom layer Is formed
by a three shaft twlll.
` 20 Instead of such a modlfled double four shaft process, a double
three shaft process can be used.
The weavlng dlagram of Flgure 3 shows the sequence of shaft
posltlons for the productlon of a slngle layer area extending In the
weft dlrectlon. Thls weave results In the productlon of an elght shaft
fabrlc.
; For the productlon of the double layered tubular sectlons, the
'J, shafts are posltloned accordlng to the weavlng dl3gram of Flgure 4. Thls
` results In the productlon of two four shaft twllls.
In order to produce fabrlc havlng double and slngle layered areas
alternatlng In both the warp and weft dlrectlons, the above-descrlbed
we~ves are comblned.
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Obvlously, the fabrlc of the present Inventlon can be made up
of ~ny of a great number of materlals. In partlcular, the present
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2S70
Inventlon could be formed of a comblnatlon of metal and plastic
thresds, such that one layer of the two layer areas would always be
metal and the other layer would always be plastlc. Alternatively, the
two layers could be formed of two dlfferent types of metal wlre.
from the foregolng, It can be readlly reallzed that thls
Inventlon can assume various embodlments. Thus, It Is to be under-
stood that the inventlon Is not IImlted to the speclflc embodlments
descrlbed hereln, but Is to be llmlted only by the appended clalms.
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