Container lid formed as a laminate having a built-in opening feature, container incorporating same, and method of making same

摘要

A lid for a container having a built-in opening feature comprises a flexible laminate comprising an upper layer and a lower layer, a pair of radially spaced concentric lines of weakness being formed in the laminate, an outer one of the lines of weakness being formed in the upper layer and an inner one of the lines of weakness being formed in the lower layer, wherein the upper and lower layers in an annular region between the lines of weakness are readily peeled apart, and wherein the upper and lower layers outside the annular region are laminated together with an adhesive providing a bond with a greater peel strength than that required to separate the layers in the annular region.