Patent ID: 9517869
Filing Date: 2016-12-13
CPC Classification: B65D

Claim Text:
1. A method for making a cap to engage a neck of a container having a rim with a circular sealing surface, the neck having a male thread and a center axis, and a sealing film or foil that is sealingly attached to the rim, and the cap having a female thread complementary to said male thread for screwing down onto the neck for unscrewing at any later point in time, as desired, the method comprising the steps of configuring the cap including forming a detachment knife on the cap aligned from the periphery of the rim and progressing inwardly toward the center axis; and biasing said detachment knife radially to at least partially unseal the film or foil from said rim, and lifting said seal off from said rim, when said cap is unscrewed from said neck.