Patent ID: 8281500

Claim:
An insert for a container for holding a liquid, the insert comprising: a frame sized to fit snugly but smoothly into an opening into and along at least part of the length of the container, the frame having first and second ends; a top vane at the first end of the frame, the top vane having a width wider than the container opening, so that the insert, when inserted into the container, comes to rest with the top vane adjacent to the container opening; a stopping vane at the second end of the frame; additional vanes spaced apart and attached to the frame, the additional vanes extending from one side to the opposite side of an internal width of the container, said additional vanes being distributed along the length of the frame at a selected tilt angle and a selected pitch angle, wherein a gas may enter the container opening and, due to the additional vanes and their distribution, flow along one side of the frame and pass over the surface of a liquid in the container and, carrying some of the liquid molecules, exit the container along the other side of the frame, said stopping vane blocking the flowing gas from reaching beyond the stopping vane.