Abstract: A bag having an end closure through which the bag is filled after sealing of the closure. A valve sleeve is provided in the end closure through which a filling tube may be inserted for filling the bag. After completion of the filling operation, the valve sleeve is tightly flattened within the closure, so that the material filling the bag does not leak through the sleeve. The valve sleeve includes a flexible tubing secured to a reinforcing strip. The reinforcing strip is secured to the end closure along substantially its entire length when the closure is sealed and prevents the flexible tubing from crimping, so that it may be tightly flattened. A slit is provided in the valve sleeve from its inner end to about its middle along an axis parallel to the axis of insertion of the filling tube into the sleeve. The means for securing the reinforcing strip to the end closure covers substantially the closure contacting face of the strip, except in the area of the slit.

Abstract: An improved weatherproof dunnage bag for use in an open freight transport vehicle is provided. The bag includes an air bladder for expanding the bag and a plurality of air bladder reinforcing sheets enclosing the bladder. The outermost sheet is coated with a moisture resistant material and a moisture resistant overslip is provided surrounding each of two opposite ends of the bag. The overslips are heat sealed to the outermost sheet, so that the overslips and coating on the outermost sheet prevent moisture from pervading the sheets. A valve extending through the sheets from the bladder of the bag protrudes through an opening in one of the overslips, the opening having a diameter substantially equal to the inside diameter of the valve, so that the overslip fits tightly around the valve to prevent moisture from leaking into the bag around the valve. A moisture resistant tape is provided covering each seam in the outermost sheet.