Vessel cap elastically deformable plastic material.

摘要

A container lid is provided with a lid flange 2 downwardly merging into a releasing flange 13 which from a position in which an inwardly extending snap rib 9 on said flange 2 engages a sealing edge on a container flange 9 or a container mouth bead is upwardly bendable to a position in which said snap rib 8 goes clear of said container flange or abuts it at slight pressure. Releasing flange 13 acts as a bistable snap catch and is retained in its extreme positions by means of its inherent annular tension. Releasing flange 13 causes even a large container lid seated firmly prestressed on a container to be readily removed, no tools being necessary. IMAGE