| 摘要 |
<p>A steel or tinplate lid (10) and lid interconnection to a full open head steel or tinplate pail (32) providing improved resistance to leakage when subjected to severe internal pressure and in which the lid (10) has a generally planar central portion (18), lugs (11) around the periphery, a peripheral gasket groove (14) containing a cellular, compressible gasket (37); in which the central portion (18) is provided with from two to four upwardly and outwardly deformed beads (19) each having a cross sectional profile asymmetrically offset from a radial centre line of that bead and each bead having an uppermost crest (23) upwardly offset from the central portion (18) of the lid by 23 to 27 % of the distance from the central portion (18) to the gasket groove (14).</p> |
