Easy-openning lid

Abstract

Easy-open lids applicable to lids (1), provided with a cut line (3) parallel and close to its contour, on which line a punch-tear away ring tab (4) attached to the lid (1) by means of a rivet (9) and provided with a punch vertex (6) acting on the cut line (3) acts, entail arranging a cut line (3) in correspondence with the theoretical actuation point (10) on the line for the punch vertex (6) of the ring tab (4), an arcuate segment (8) with a curvature center (9) coinciding with the imaginary axis of the rivet (4), such that after an accidental rotation of the ring tab (4) during the manufacturing process thereof or during handling of the container in which it is integrated, its punch vertex (6) is kept in place facing the cut line (3), ensuring optimal tearing conditions for the lid in spite of the incorrect position of the ring tab (4).

Description

OBJECT OF THE INVENTION [0001] The present invention, an easy-open lid, applies to the field of metal containers, specifically of those containers used for food commercialization, such as tins, cans, etc., and specifically focuses on the opening means of the lid thereof, commonly called “easy-open”. [0002] The invention is specifically related to the classic groove or cut which are provided on lids of this type of containers, for facilitating the opening thereof by means of a punch-tear away ring tab. BACKGROUND OF THE INVENTION [0003] In the preferred scope of practical application of the invention, sealed food packaging, metal containers are conventionally used, the lid of which is provided with a perimetral groove or cut line, as well as a ring tab provided with a punch vertex overlapping said cut line, such that in normal conditions, the ring tab is parallel and adjacent to the lid, whereas during the opening maneuver, it swings thereon such that initially, and through its punch...

AI Technical Summary

Benefits of technology

"The present invention is a new type of lid for metal containers used for food commercialization. It is designed to be easy to open and has a special groove or cut on the lid that allows for easy opening with a punch-tear away ring tab. The technical effect of this invention is to provide a more convenient and efficient way to open metal containers for food commercialization."

Problems solved by technology

This solution, perfectly valid from the theoretical point of view, presents drawbacks in practice derived from an incorrect positioning of the ring tab.

This increase of force contributes to significantly increasing the number of lids in which the ring tab cannot overcome the cut and does not open the lid, even occasionally causing the ring tab to break since the hole which connects the ring tab to the lid by means of a rivet, becomes deformed, with the subsequent release of the ring tab and inability to use the container opening mechanism.

The devices used for preventing the rotation of the ring tab do not ensure that, daring the handling of the can in the different manufacturing processes thereof, it will not slightly rotate, although it does reduce said rotation.

Images