Press for removing supernatant from a flexible vessel

摘要

A press for removing supernatant from a flexible vessel includes cooperating press members having an open position to insert the vessel between them, and a closed position to compress the vessel between them. At least one of the press members has a compliant pad on its press surface. The compliant pad compensates for variable thickness of the vessel when it is compressed. The press is constructed to compress a first or lower portion of the vessel less than a second or upper portion of the vessel. Preferably, the press additionally includes a barrier structure that creates a barrier between the lower portion of the vessel and the upper portion of the vessel when the vessel is compressed. The press can also include a vessel holder having a structure for adjusting the position of the vessel within the press.