| 摘要 |
<p>The invention relates to easy-opening lids which are suitable for lids (1) comprising an incision line (3) which is disposed parallel with, and close to, the edge thereof. A punching/tearing ring (4), which is fixed to the lid (1) by means of a rivet (9), acts on the aforementioned incision line (3). Said punching/tearing ring (4) is provided with a punching tip (6) which acts on the incision line (3). According to the invention, an arched section (8) having a centre of curvature (9) which coincides with the imaginary axis of the rivet is produced on the incision line (3) such that it is aligned with the theoretical point of intersection (10) between the incision line and the punching tip (6) of the ring (4). In this way, in the event of the ring (4) being partially rotated during the production process or during the handling of the container comprising same, the punching tip (6) is maintained face-to-face with the incision line (3), thereby ensuring optimal tearing conditions for the lid despite the fact that the ring (4) is not positioned correctly.</p> |
