Patent ID: 9636679
Date: 2017-05-02
CPC Classifications: B01L,B65D

Claim:
1. A cap comprising: a body, an opening passing through the cap and adapted in turn to be passed through by at least one product transfer member, and a membrane which, at rest, covers the opening, wherein the membrane has a main portion that extends through the opening and defines two inclined faces, each inclined face having a distal edge, and wherein the two inclined faces form a dihedron when the membrane is at rest, the distal edges of the two inclined faces coming together at the apex of the dihedron, wherein said cap comprises at least two flaps extending through the opening, above the membrane, the two inclined faces of the membrane being respectively covered by the two flaps, each flap having a free edge that extends along the distal edge of the corresponding inclined face, so that, when the transfer member passes through the opening and the membrane, the free edges of the two flaps respectively press along the distal edges of the two inclined faces, wherein each flap has a lower surface facing the membrane and an upper surface opposite the lower surface, wherein the lower surface of each flap includes at least a first geometric feature having a first configuration, wherein corresponding inclined faces of the membrane include at least a second geometric feature having a second configuration complementary to the first configuration, and wherein an entirety of the first or second geometric features is enclosed by the other of the first and second geometric features.