| 摘要 |
An elongated, flat-sealed flexible, collapsible container comprises a pair of facing plastic walls and a peripheral, annular heat seal joining the walls together. Access ports are positioned at one end of the container. In accordance with this invention, the peripheral heat seal defines at the end opposite to the one end a first, straight end seal section extending generally perpendicularly to the longitudinal axis of the container, and a pair of second, straight end seal sections extending from adjacent each end of the first end seal section and defining an obtuse angle to it. The container, when filled and placed in a centrifuge cup, tends to form inwardly-extending creases in the second end seal sections which do not trap portions of the contents of the container.
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