BOTTLE CORKING CAP Russian patent published in 2011 - IPC B65D41/34 

FIELD: transport, package.

SUBSTANCE: proposed cap comprises outer metal shell with raised elements on inner and outer surfaces, and inner polymer insert with raised elements on outer surface. Inner polymer insert is made integral with outer shell all along polymer insert outer surface. Polymer insert outer surface has, at least, one raised element with shape and sizes identical to that on outer shell inner surface. Every raised element on polymer insert outer surface is rigidly jointed to each identical raised element on outer shell inner surface. Note here that corking element comprises tear-off belt that makes said raided element of outer shell. Invention covers also another version of corking cap.

EFFECT: perfected design ruling out failure of polymer insert and outer shell.

13 cl, 4 dwg