Aluminium alloy can lid

摘要

The invention relates to an aluminium alloy can lid. According to the invention, the aluminium alloy sheet forming the lid 2 has an elastic limit of between 235 and 235 10 Pa and its extension is equal to or greater than 6%, the opening ratio defined by the ratio of an area 4 defined by a notch 3 with respect to the total area of the can lid is chosen to be at least equal to or greater than 60%, the can lid's resistance to pressure is kept substantially at 5 bars at least, and this notch is spaced from the corner formed around the bottom of the truncated cone section of the can lid by a distance equal to or greater than 1 mm towards the inside of the can lid area, the inside radius of curvature of this corner being chosen to be equal to or less than 0.5 mm. The invention applies in particular to cans for containing beer or other fizzy drinks. <IMAGE>