Screw-cap for container

Details Screw-cap for container Screw-cap for container

1983-05-03

1984-12-25

Norton, Donald F.

Bottles and jars

Closures

Cap type

215341, 215344, 215DIG1, B65D 5300

Patent

active

044898452

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.

REFERENCES:
patent: 2965256 (1960-12-01), Yochem
patent: 3255907 (1966-06-01), Eddy
patent: 4143785 (1979-03-01), Ferrell

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