| 摘要 |
The packaging has a lid (14) closing an opening (20) at the top of a container (12) and bearing a deformable membrane (48) to seal a product housing (24) when the lid is in a closed position. The membrane has a flexible central wall (50) surrounded by a rigid annular rim (52). The rim is urged in an axial closing direction by a spring (72) bearing on a lid base such that the rim sealingly bears on an annular bearing (28) surrounding the opening when the lid is in the closed position. The wall is deformed due to differences between pressures prevailing on either side of the membrane. The spring is a metal, synthetic or gas spring. |
