| 摘要 |
The capsule (1) is sealed without an internal filter. It comprises a cup- shaped body (2) with an outwardly projecting flange (2a), and a flexible lid (3) welded to the flange (2a) of the cup-shaped body (2) so as to define wi th the latter a sealed chamber (4) which is impermeable to oxygen and moistu re and contains a quantity of granular material (5). The granular material ( 5) is first compressed inside the chamber (4) in a direction perpendicular t o the plane containing the flange (2a), with a compressive load preferably o f between 2 and 50 Kg per cm2 of the average cross-sectional area of the cha mber (4), so as to form a compact tablet (5) of said material. A vacuum is f ormed inside the chamber (4) to a degree such that the lid (3) adheres to th e upper surface of the tablet (5).
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