Abstract: A foldable bag material is formed into a bag having at least one end with a corner and having an end closure formed by the bag material which closes off the one end of the bag. A filter valve tube extends within the end closure at the one corner, the tube having an inner end disposed within the interior of the bag such that the tube is adapted to receive a filler nozzle of a pneumatic filling device for filling the bag with a filling material. The tube has an inner end portion and an outer end portion, the inner end portion having a cross-sectional contraction which is contracted relative to the outer end portion such that the contracted inner end portion forms a seal with the filler nozzle, the tube being made at least partially of a filter material which is gas-permeable but which retains the filling material such that the gas-permeable material provides for venting of the bag during filling.

Abstract: A bag of foldable material has an end closure closing off one end of the bag and a filling valve tube device extends into the end closure at a corner of the bag, the filling valve tube device has an inner end disposed within the interior of the bag and has an inner layer which is convertable from a normally inactive adhesive state to a state capable of sealing off the filling valve tube device. A shut-off lip device of flexible material is disposed within the end closure and projects into the interior of the bag beyond the interior end of the filling valve tube device, the shut-off lip device being constructed to be responsive to the pressure of the filling material introduced into the interior of the bag to close off the interior opening of the filling valve tube device.