DISPOSABLE VESSEL HAVING EASILY REMOVABLE COVER TO REMOVE COVER FROM VESSEL WITH SMALL POWER

摘要

PURPOSE: A disposable vessel having an easily removable cover is provided to easily remove a cover from the vessel with a small power by letting a removing power concentrate on one point among many points formed on the protruding portion of the flange of the vessel. CONSTITUTION: The disposable vessel includes a vessel body(1), a flange(2) formed at the upper edge of the vessel body and a cover(3), which stick to the flange(2). The protruding portion for reinforcing sealing is installed at the upper surface of the flange(2). The protruding member(10) is formed in the shape of a polygon having many apexes having same distance between neighboring apexes. The angle of the inner surface(12) of the protruding member is different from the angle of the outer surface of the protruding member(10).