Abstract: A collapsible container defined by a continuous rigid structure and an integrated internal truss system. The continuous rigid structure is preferably four-sided such that it defines four continuous surfaces of a cube. The continuous rigid structure is collapsible due to at least one scoring line defined on at least one surface thereof. The internal truss system includes at least one inelastic member that is threaded through the surfaces of the continuous rigid structure to form a symmetrical and unitary support. A liner may be integrally affixed to each of the four sides and additionally provides a fifth side that forms the bottom of the container. A protective cover may be secured to the exterior of the continuous rigid structure for protecting the contained materials against the elements. The cover can be selectively sealed for rendering the container of the present invention substantially impervious to the elements.

Abstract: A collapsible container defined by a continuous rigid structure and an integrated internal truss system. The continuous rigid structure is preferably four-sided such that it defines four continuous surfaces of a cube. The continuous rigid structure is collapsible due to at least one scoring line defined on at least one surface thereof. The internal truss system includes at least one inelastic member that is threaded through the surfaces of the continuous rigid structure to form a symmetrical and unitary support. A liner may be integrally affixed to each of the four sides and additionally provides a fifth side that forms the bottom of the container. A protective cover may be secured to the exterior of the continuous rigid structure for protecting the contained materials against the elements. The cover can be selectively sealed for rendering the container of the present invention substantially impervious to the elements.

Abstract: The present invention includes a collapsible container defined by a continuous rigid structure and an interior liner that is uniformly affixed thereto. The continuous rigid structure is preferably four-sided such that it defines four continuous surfaces of a cube. The continuous rigid structure is collapsible due to at least one scoring line defined on at least one surface thereof. The liner is integrally affixed to each of the four sides and additionally provides a fifth side that forms the bottom of the container. A protective cover is secured to the exterior of the continuous rigid structure for protecting the contained materials against the elements. The cover can be selectively sealed for rendering the container of the present invention substantially impervious to the elements.

Abstract: A collapsible container that incorporates the features of a rigid free-standing container with the flexibility and collapsibility of a bulk bag. Stiffening members are placed into pockets created by sewing together two pieces of woven polypropylene. The members may be removed and placed inside the bag for shipping and then installed in the sewn pockets to create a collapsible container suitable for containment and shipment of bulk materials of up to 70% liquid composition.

Abstract: Filter apparatus for filtering liquids in pressure vessels. The invention solves the sealing problem associated with filter bags by providing a filterable seal fabricated from the filter material itself fastening to a flexible collar. The filter provides simple insertion or removal, low cost of fabrication yet ensures that substantially all liquid passing through the pressure vessel will be filtered.