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AssigneeCovess N.V.
InventorsTony Vanswijgenhoven, Dieter Vanswijgenhoven, Axel Seifert
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The present invention describes a method for producing a leak-tight vessel for holding a gas and/or liquid, comprising the steps of winding a heat-sealable thermoplastic barrier strip around a removable mandrel in such a way that each strip fragment overlaps with a substantially parallel strip fragment over at least a lateral overlapping distance, consolidating the overlapping strip fragments so as to form a gas and/or liquid tight layer, winding a fibrous material around the gas and/or liquid tight layer, thereby leaving an opening large enough for removing the mandrel. The invention also describes a leak-tight vessel produced in this way.
A leak-tight vessel for holding a gas and/or a liquid, comprising:
The leak-tight vessel according to any of the preceding claims wherein an outer peripheral of the end fitting is dimensioned such that by covering the outer concave side of the end fitting outside the opening up to said outer peripheral by the inner barrier layer and the outer shell layer, the resulting rigid unitary structure formed by the inner barrier layer, the outer shell layer and the end fitting can withstand an overpressure of at least two bars.
Dependencies are inferred from the claim text.