| 摘要 |
Two concave container parts 5, 6 have a membrane 8 between, contacting both. A string 12 connected to the membrane passes out of the container through a passageway between a guide 17 on one part and a seal 19 which inhibits fluid communication into or out of the container on the other part. The membrane has at least two lines of weakness 40 measuring at least 40% of the length of the membrane; the lines are parallel to and at opposite sides of the line between the membranes centre and a point where the string connects to the membrane. At least one tab 36 is provided on the membrane, ideally folded on its edge outside the lines of weakness. There may be a string blocking means in habiting access to the strings free end or preventing it applying a force to the membrane. The string may form an acute angle with the membrane. Ideally the sealing structure is sloped and flexible to contact the guide on the opposing container at an acute angle. There may be an opening with a lid opposite the membrane on one of the container parts. |
