| 摘要 |
TThe present invention concerns a container lid comprising a ring (2) defining an opening (6), said opening (6) being closed by a membrane (7) of ''peelable'' type, which peelable membrane (7) is joined to a peripheral surface (L) of said ring (2), said joining surface (L) being delimited by an inner border (Li) and an outer border (Lo), by means of a layer of matter (16) known as sealant layer constituting a surface coating layer of said ring (2) and / or said peelable membrane (7). According to the invention, on at least a part of the circumference of said joining surface (L), the thickness of the sealant layer (16) is variable in the radial direction, that is to say on its width, forming a width of variable thickness, this thickness increasing on at least a part of the width of said joining surface (L), in the direction from its outer border (Lo) towards its inner border (Li). |
