Metal can for a food product

Abstract

A metal can ( 40 ) for preserving a food product sterilised by heat treatment after closing the can, is made up of an integral body forming the bottom ( 41 ) and the side wall ( 43 ) of the can, and a lid ( 42 ) are mounted on the body in order to seal the latter, the minimum thickness of the side wall ( 43 ) being between 20% and 60% of the thickness of the centre of the bottom ( 41 ). The height of the can ( 40 ) is between 1.5 and 3.5 times the width thereof, and the bottom ( 41 ) and/or the lid ( 42 ) of the can has a central wall ( 411, 421 ) with an outwardly convex shape, connected to the side wall ( 43 ) by a peripheral groove ( 410 ) opening up towards the outside.

1 . A metal can ( 40 ), for preserving a food product sterilised by heat treatment after the closing of the can, made up of an integral body forming the bottom ( 41 ) and the side wall ( 43 ) of the can, and of a lid ( 42 ) assembled to this body so as to close the latter, the minimum thickness of the side wall ( 43 ) being between 20% and 60% of the thickness of the centre of the bottom ( 41 ), characterized in that the height of the can ( 40 ) is between 1.5 and 3.5 times the width thereof, and in that the bottom ( 41 ) and/or the lid ( 42 ) of the can ( 40 ) has a central wall ( 411 ,  421 ) with an outwardly convex shape, connected to the side wall ( 43 ) by a peripheral groove ( 410 ,  420 ) opening up outwards. 
     
     
         2 . A can ( 40 ) according to  claim 1 , characterized in that the internal pressure thereof is higher than the atmospheric pressure. 
     
     
         3 . A can ( 40 ) according to  claim 1 , characterized in that said peripheral groove ( 410 ,  420 ) has a first wall ( 413 ,  423 ) connected to the convex central wall ( 411 ,  421 ), a second wall ( 414 ,  424 ) connected to a peripheral area of connexion to the side wall of the can, and a bottom ( 415 ,  425 ) forming a rounded shape, and in that:
 the first wall ( 413 ,  423 ) forms an angle between 2° and 45° with the axis of the can,   the connexion between the first wall ( 413 ,  423 ) and the central wall ( 411 ,  421 ) forms a rounded shape with a radius greater than 0.5 mm,   the depth of the groove ( 410 ,  420 ) is between 1 mm and 7 mm, and   the rounded shape of the bottom ( 415 ,  425 ) of the groove has a radius smaller than 5 mm.   
     
     
         4 . A can ( 40 ) according to  claim 1 , characterized in that the lid ( 42 ) is made up of a disk of steel-based material, in that the capacity thereof is 212 ml, 425 ml or 850 ml, and in that to these capacities are associated lids of diameter 52 mm, 65 mm and 83 mm, respectively. 
     
     
         5 . A can according to  claim 1 , characterized in that the lid ( 42 ) is made up of an aluminium disk, in that the capacity of the can is 212 ml, 425 ml or 850 ml, and in that to these capacities are associated lids of diameter 52 mm, 63.7 mm and 81.5 mm, respectively. 
     
     
         6 . A can according to  claim 1 , characterized in that beads are formed on the side wall ( 43 ) thereof, so as to increase the resistance thereof to the external pressure. 
     
     
         7 . An integral body of a metal can ( 40 ), for preserving a food product sterilised by heat treatment after closing of the can, the body comprising a bottom ( 41 ) and a side wall ( 43 ), the minimum thickness of the side wall ( 43 ) being between 20% and 60% of the thickness of the centre of the bottom ( 41 ), characterized in that the height of the body is between 1.5 times and 3.5 times the width thereof, and in that the bottom ( 41 ) has a central wall ( 411 ) with an outwardly convex shape, connected to the side wall ( 43 ) by a peripheral groove ( 410 ) opening up outwards. 
     
     
         8 . An integral body of a can according to  claim 7 , characterized in that said peripheral groove ( 410 ) has a first wall ( 413 ) connected to the convex central wall ( 411 ), a second wall ( 414 ) connected to a peripheral area ( 412 ) of connexion to the side wall ( 43 ) of the can ( 40 ), and a bottom ( 415 ) forming a rounded shape, and in that:
 the first wall ( 413 ) forms an angle between 2° and 45° with the axis of the can,   the connexion between the first wall ( 413 ) and the central wall ( 411 ) forms a rounded shape with a radius greater than 0.5 mm,   the depth of the groove ( 410 ) is between 1 mm and 7 mm, and   the rounded shape of the bottom ( 415 ) of the groove has a radius smaller than 5 mm.   
     
     
         9 . An integral body of a can ( 40 ) according to  claim 7 , characterized in that beads are formed on the side wall ( 43 ) thereof, so as to increase the resistance thereof to the external pressure. 
     
     
         10 . A can ( 40 ) according to  claim 2 , characterized in that said peripheral groove ( 410 ,  420 ) has a first wall ( 413 ,  423 ) connected to the convex central wall ( 411 ,  421 ), a second wall ( 414 ,  424 ) connected to a peripheral area of connexion to the side wall of the can, and a bottom ( 415 ,  425 ) forming a rounded shape, and in that:
 the first wall ( 413 ,  423 ) forms an angle between 2° and 45° with the axis of the can,   the connexion between the first wall ( 413 ,  423 ) and the central wall ( 411 ,  421 ) forms a rounded shape with a radius greater than 0.5 mm,   the depth of the groove ( 410 ,  420 ) is between 1 mm and 7 mm, and   the rounded shape of the bottom ( 415 ,  425 ) of the groove has a radius smaller than 5 mm.   
     
     
         11 . A can ( 40 ) according to  claim 2 , characterized in that the lid ( 42 ) is made up of a disk of steel-based material, in that the capacity thereof is 212 ml, 425 ml or 850 ml, and in that to these capacities are associated lids of diameter 52 mm, 65 mm and 83 mm, respectively. 
     
     
         12 . A can according to  claim 2 , characterized in that the lid ( 42 ) is made up of an aluminium disk, in that the capacity of the can is 212 ml, 425 ml or 850 ml, and in that to these capacities are associated lids of diameter 52 mm, 63.7 mm and 81.5 mm, respectively. 
     
     
         13 . A can according to  claim 2 , characterized in that beads are formed on the side wall ( 43 ) thereof, so as to increase the resistance thereof to the external pressure. 
     
     
         14 . An integral body of a can ( 40 ) according to  claim 8 , characterized in that beads are formed on the side wall ( 43 ) thereof, so as to increase the resistance thereof to the external pressure.