Double wall multitube bags for enclosing the active material of positive plates in electric lead batteries
AssigneeMecondor S.p.A.
InventorGiovanni Terzaghi
Life of this patent
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Abstract
Multitube sheath or bag for enclosing the active material of positive plates in electric lead batteries. The bag comprises four discrete fabrics simultaneously made on a shuttleless loom. The fabrics are interconnected along parallel lines by means of one or more weft threads. Thereby, every side of each tube comprises a double wall formed by two different fabrics, of which the inner fabric has weft threads of glass yarn and warp threads of synthetic yarn, the number of weft threads being much larger than that of warp threads at a same length of the fabric involved. The two outer fabrics are essentially made of synthetic yarn.
Claims15
A multitube bag for enclosing active materials of positive plates in a lead-acid battery, said multitube bag comprising:
- four layers of woven fabric tied to one another at regular intervals to provide discrete and successive double wall tubes, weft threads of said four fabric layers being parallel to the axes of said tubes, thermosetting resin covering at least partly the yarns of said four fabric layers for stiffening said multitube bag, two of said layers having inner fabric with a weft of substantially high chemical resistance glass yarn and a warp thread of synthetic yarn, two layers having outer fabric with a warp of synthetic yarn and a weft, the weft threads being larger in number than the warp threads in at least the two layers of inner fabric, said synthetic yarn comprising yarn exhibiting substantially high resistance to diluted sulphuric acid and oxidation, the four layers of woven fabric being tied to one another by weft threads inserted between the warps of the four interwoven fabrics.
Dependencies are inferred from the claim text.