Spout for ensuring evacuation of a flexible container

1. A spout connected in fluid communication to a flexible container, the spout comprising:

a base being connected to one of a plurality of walls of the flexible container, wherein the spout is generally centrally disposed on a base, and the spout extends in a perpendicular direction from the base;

a passageway having a diameter within the spout in fluid communication with an inside of the flexible container, the passageway having a top end and a bottom end, the passageway being substantially perpendicular to the base; and,

an evacuation structure having fluid channels therethrough pivotally connected to the bottom end of the passageway and moveable from a fill position to an evacuate position, the structure being substantially parallel to the base and spanning the entire diameter of the passageway in the evacuate position, the entire evacuation structure pivoting in a same direction away from the spout to the fill position when the flexible container is filled through the spout with fluid and does not span the entire diameter of the passageway, wherein the pivotal connection has a memory such that after filing, the memory causes the structure to pivot back towards the spout ensuring that the walls of the flexible container do not prohibit the fluid from evacuating.

2. The spout of claim 1 , wherein the evacuation structure prohibits the walls of the flexible container from entering the passageway when the flexible container is evacuated.

3. The spout of claim 1 , wherein the evacuation structure comprises at least one crosshair structure, the crosshair having two overlapping structural members and at least one end of one member is pivotally connected to the bottom end of the passageway.

4. The spout of claim 3 wherein the overlapping structural members are attached at a point at which they overlap with one another.

5. The spout of claim 1 , wherein the evacuation structure is a substantially flat permeable plate, the permeable plate having a periphery, at least one point on the periphery being pivotally connected to the bottom end of the passageway.

6. A spout connected in fluid communication to a flexible container, the spout comprising:

a base being connected to the flexible container, wherein the spout is generally centrally disposed on the base, and the spout extends in a perpendicular direction from the base;

a passageway having a diameter allowing for fluid communication with the flexible container, the passageway having a top end and a bottom end, the passageway being substantially perpendicular to the base;

an evacuation assistance structure pivotally connected to the bottom end of the passageway generally parallel to the base and spanning the entire diameter when in an dispensing position, the evacuation structure pivoting away from the spout to a fill position where the structure does not span the entire diameter when the flexible container is filled through the spout with fluid, the pivotal connection having a memory such that after filling, the memory causes the evacuation structure to pivot back towards the spout after filling; and,

wherein the evacuation assistance structure has a liquid flow through hole region formed therein such that, even when the evacuation assistance structure is pivoted all the way back towards the spout to a closed position, liquid is allowed to flow through the evacuation assistance structure and into the passageway.

7. The spout of claim 6 , wherein the evacuation structure prohibits the walls of the flexible container from entering the passageway when the flexible container is evacuated.