Abstract: Apparatus for packaging articles in a controlled atmosphere, such as one created by a vacuum followed by the addition of gas, such as carbon dioxide, provided within a flexible container having an open end. The packaging apparatus includes a frame and a support one the frame for the flexible container, which is preferably supported within a rigid outer container, to maintain a substantially fixed position for the articles in the flexible container. A fixed elongated member or manifold is mounted on the frame and includes an upwardly and forwardly angled sealing surface. The fixed elongated member cooperates with a movable elongated member or manifold which is operatively mounted on the frame and includes a sealing face which is movable into cooperative relationship with the sealing surface of the fixed manifold. The movable manifold is movable between a position which is spaced from the fixed manifold and a second position which is adjacent or against the sealing surface of the fixed manifold.