Abstract: A fabric tube with two passages comprises a fabric tube sheet. A first fabric weld strip with right and left flanges extending laterally from a bottom edge of a weld fin is welded to a first surface extending the length of the fabric tube sheet at a distance D1 from the first edge thereof A second fabric weld strip is welded to an opposite second surface and extends the length of the fabric tube sheet between the first fabric weld strip and the second edge of the fabric tube sheet at a distance D2 from the second edge of the fabric tube sheet. The first edge of the fabric tube sheet is welded to the weld fin of the second fabric weld strip and the second edge of the fabric tube sheet is welded to the weld fin of the first fabric weld strip to form two passages.

Abstract: A portable containment system has a flexible liner sheet and a plurality of leg assemblies attached to the edge portions of the liner sheet. Each leg assembly consists of two legs connected by a fabric hinge and movable from a collapsed transport position to an upright operating position where the legs slope upward toward each other to form a triangle. The edge portions of the liner sheet are attached to the top of the triangle. The bottom ends of the leg assemblies are connected to a flexible leg sheet such that the leg assemblies are evenly spaced. Moving all the leg assemblies to the operating position supports the edge portions of the liner sheet in a raised position sloping upward from the surface at an angle less than about 75 degrees, such that a containment area is formed inside the sloping edge portions of the liner sheet.

Abstract: A fabric tube with two passages comprises a fabric tube sheet. A first fabric weld strip with right and left flanges extending laterally from a bottom edge of a weld fin is welded to a first surface extending the length of the fabric tube sheet at a distance D1 from the first edge thereof A second fabric weld strip is welded to an opposite second surface and extends the length of the fabric tube sheet between the first fabric weld strip and the second edge of the fabric tube sheet at a distance D2 from the second edge of the fabric tube sheet. The first edge of the fabric tube sheet is welded to the weld fin of the second fabric weld strip and the second edge of the fabric tube sheet is welded to the weld fin of the first fabric weld strip to form two passages.

Abstract: A fabric tube with two passages comprises a fabric tube sheet. A first fabric weld strip with right and left flanges extending laterally from a bottom edge of a weld fin is welded to a first surface extending the length of the fabric tube sheet at a distance D1 from the first edge thereof. A second fabric weld strip is welded to an opposite second surface and extends the length of the fabric tube sheet between the first fabric weld strip and the second edge of the fabric tube sheet at a distance D2 from the second edge of the fabric tube sheet. The first edge of the fabric tube sheet is welded to the weld fin of the second fabric weld strip and the second edge of the fabric tube sheet is welded to the weld fin of the first fabric weld strip to form two passages.

Abstract: A fabric tube with two passages comprises a fabric tube sheet. A first fabric weld strip with right and left flanges extending laterally from a bottom edge of a weld fin is welded to a first surface extending the length of the fabric tube sheet at a distance D1 from the first edge thereof. A second fabric weld strip is welded to an opposite second surface and extends the length of the fabric tube sheet between the first fabric weld strip and the second edge of the fabric tube sheet at a distance D2 from the second edge of the fabric tube sheet. The first edge of the fabric tube sheet is welded to the weld fin of the second fabric weld strip and the second edge of the fabric tube sheet is welded to the weld fin of the first fabric weld strip to form two passages.

Abstract: A flexible air hose comprises a plurality of hose sections, each having at one end a female portion and at an opposite end a male portion coupled inside the female portion of an adjacent hose section. A loop coupling fastener is attached to an inside surface of the female portion, and a corresponding area of an outside surface of the male portion. A single slit extends from an end edge of the female portion of the hose section longitudinally along the hose section such that the female portion can be opened along the slit to facilitate positioning the male portion inside the female portion. A flap can be provided to cover the slit, and extend past the slit end to reduce air leakage. A wear strip can be wrapped around the hose.