초록 ▼

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 inn

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.

대표청구항 ▼

A screw-cap made of plastic material for closing the mouth of a container having a predetermined outer diameter, consisting of an approximately cylindrical cap side-wall with inner threading and a cap top, which is provided with a ring-shaped sealing lip to seal against the outer side of the mouth o

A screw-cap made of plastic material for closing the mouth of a container having a predetermined outer diameter, consisting of an approximately cylindrical cap side-wall with inner threading and a cap top, which is provided with a ring-shaped sealing lip to seal against the outer side of the mouth of the container in the area of the opening, characterized in that the inner diameter (A) of the sealing lip (5), before the screw-cap (1) is screwed on, is greater than the outer diameter (B) of the container mouth (2) against which it is to seal, in that the cap top (4) has a clamping device inserted into the container mouth for effecting radial contraction of the cap top when putting on the screw-cap, and in that at least the cap top is elastically constructed in such a way that the sealing lip is contracted inwardly and pressed against the outer side of the container mouth, as the clamping device is inserted into the container mouth, by means of the compression of the cap top and the radial contraction and reduction of its outer diameter.