Screw-cap for container
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United States of America Patent
Stats
-
Dec 25, 1984
Grant Date -
N/A
app pub date -
May 3, 1983
filing date -
May 4, 1982
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A screw-cap (1) for closing a container mouth has a sealing lip (5), which is affixed to the cap top (4). The inner side-wall (7) of the sealing lip (5) has a diameter (A) which is greater than the outer diameter (B) of the container outer wall (8). A clamping device, which can be designed as an inner seal (13), creates a contraction of the cap top when the screw-cap is screwed on to the container, by which means the sealing lip (5) is pressed against the container mouth (8). In this manner the sealing lip (5) is only pressed radially against the container mouth during the course of the screwing-on process. In this way over-stretching and damage to the material of the sealing lip can be prevented.
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