the lids of containers: development of a peelable seal

摘要

THE INVENTION RELATES TO A CONTAINER LID COMPRISING A RING (2) DEFINING AN OPENING (6),The opening (6) is closed by a detachable membrane (7),The detachable film (7) is connected to the outer surface (L) of the ring (2,1)The connection surface (L) is divided by an internal edge (LI) and an external edge (LO)The middle layer of a material layer (16) is called '' According to the invention, on at least a part of the bonding surfaceThe thickness (16) of the extender layer is variable in the radial direction, that is, in its width, which is a variable thickness, and the thickness increases ("L") on at least a part of the width of the connecting surface.From outer edge to inner edge