Cylindrical woven fabric tank

Claim 1

A cylindrical static vessel for holding a fluent material comprising a. a flexible, generally planar vessel bottom; b. a flexible, perimetral wall upstanding from the vessel bottom and circular in plan, said perimetral wall being formed of waterproof-coated woven fabric of synthetic material, the warp of which runs lengthwise around said wall and the weft thereof being generally upright, said synthetic material having a sufficient strength-to-weight ratio and stretch characteristics sufficient that the wall requires no internal reinforcement or external support against outward pressure from filled vessel contents; and c. framework means for supporting the upper edge of an empty vessel without supplying substantial support to the vessel when the vessel is filled with said fluent material and resting on a stable, level surface, said support means including a framework surrounding said perimetral wall and including an upper, generally horizontally disposed member, and flexible support means connected between said upper horizontally disposed member and the upper edge of the perimetral wall to maintain said perimetral wall in an upstanding position when the vessel is empty.