| 摘要 |
PURPOSE: To provide a tamper-proof vessel of making possible to use a flexible sealant material suited for containing a volatile material by composing of that applying downward a pressure, a compression and the like to the sealant portion of the tamper-proof vessel is prevented by an independent type ribs. CONSTITUTION: A single rib 6 or a plurality of ribs 6a are independent from the inside wall of a vessel or the inside portion 3 of the vessel, thus these ribs are integrally made with the outside wall of the vessel. An independent type rib 6 is vertically protruded to the same level with the height of an outer circumferential flange 2 from the bottom surface of the vessel 7 to the upper of the same. The upper surface of the rib 6 is positioned at slightly a lower portion from the bottom surface of a transparent sealant layer 4 so as to don't disturb mounting of the transparent sealant layer to the vessel 1. The height of rib 6 is almost the same with the height of the side wall of the vessel, and preferably made to be not equal with the length of the inside of the vessel. That is, when the length of the rib 6 is shortened, it prevents to form a fold, thus can enhance the strength of the vessel.
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