Can body

Abstract

The invention relates to a can body ( 10 ) for a beverage can, which can body is formed from aluminum sheet metal as a single piece and has a circumferential wall ( 12 ) and a can bottom ( 14 ), which can bottom has a cup-like central section ( 16 ) curved inward and a standing section ( 18 ) that annularly surrounds the central section and is curved outward. The standing section curved outward is connected to the circumferential wall by means of an outer transition section extending aslant in the cross-section and defines a standing ring, along which the standing section at least approximately touches a flat surface when the can body is placed on such a flat surface. According to the invention, the can body has a diameter of less than 56 mm and the greatest sheet metal thickness of the formed aluminum sheet metal in the region of the cup-like central section curved inward is less than 0.25 mm.

1 .- 13 . (canceled) 
     
     
         14 . A can body for a beverage can, wherein the can body is shaped in one piece from aluminum sheet and has a peripheral wall as well as a can bottom, which latter has a central portion, which is curved inward in the shape of a dome, and a standing portion, which annularly surrounds the central portion and is curved outward and which is connected to the peripheral wall by an outer transition portion, extending obliquely in cross section, wherein the annularly outwardly curved standing portion defines a standing ring, along which the standing portion at least approximately touches a plane surface when the can body is placed on such a plane surface, wherein the central portion curved inward in the shape of a dome has a diameter of more than 36 mm, wherein the can body has a diameter (D) of less than 58 mm, and the greatest sheet thickness of the shaped aluminum sheet in the region of the central portion curved inward in the shape of a dome is smaller than 0.25 mm;
 characterized in that the inwardly curved central portion is defined by at least a central radius of curvature R 1 _a and a peripheral radius of curvature R 1 _b smoothly adjoining this same, of which the central radius of curvature R 1 _a measures between 39 mm and 45 mm and the peripheral radius of curvature R 1 _b measures between 25 mm and 35 mm.   
     
     
         15 . The can body as claimed in  claim 14 , wherein the standing portion, together with the curved central portion, defines a bottom depth as the greatest distance of the curved central portion from a plane defined by the standing ring, which bottom depth measures between 9.5 mm and 11 mm. 
     
     
         16 . The can body as claimed in  claim 14 , the bottom of which is firstly shaped and subsequently reformed in order to obtain a final geometry, characterized in that the curved central portion passes into an inwardly curved transition radius R 2  into the standing portion, wherein the transition radius R 2 , at least prior to the reforming, measures between 1.5 mm and 1.9 mm. 
     
     
         17 . The can body as claimed in  claim 14 , wherein the standing ring has a diameter between 43 mm and 46.5 mm. 
     
     
         18 . The can body as claimed in  claim 14 , the bottom of which is firstly shaped and subsequently reformed in order to obtain a final geometry, characterized in that the standing portion bordering the standing ring, at least prior to the reforming, has mutually identical radii of curvature R 3 _a and R 3 _b which pass into each other. 
     
     
         19 . The can body as claimed in  claim 14 , the bottom of which is firstly shaped and subsequently reformed in order to obtain a final geometry, characterized in that the standing portion in the outer transition portion passes with an inwardly curved radius R 4  and a thereto adjoining outwardly curved radius R 5  into the peripheral wall, wherein the inwardly curved radius R 4 , prior to the reforming, measures between 2.7 mm and 3.1 mm, and the outwardly curved radius R 5 , prior to the reforming, measures between 3.0 mm and 3.5 mm. 
     
     
         20 . The can body as claimed in  claim 14 , the bottom of which is firstly shaped and subsequently reformed in order to obtain a final geometry, characterized in that the bottom is reformed in a manner which is known per se with a reforming tool in the region of the transition from the standing portion to the inwardly curved central portion, so that ultimately an inwardly curved inner transition portion having a diameter between 43 mm and 45 mm and a radius of curvature measuring between 0.8 mm and 1.2 mm exists. 
     
     
         21 . The can body as claimed in  claim 14 , wherein this greatest sheet thickness of the shaped aluminum sheet is smaller than 0.1 mm, and preferably smaller than 0.09 mm. 
     
     
         22 . The can body as claimed in  claim 14 , wherein the aluminum sheet has in the planar state, prior to being shaped into the can body, a sheet thickness of less than 0.25 mm. 
     
     
         23 . The can body as claimed in  claim 14 , wherein the peripheral wall is at least almost cylinder-jacket-shaped and encloses a diameter of at least approximately 53 mm. 
     
     
         24 . The can body as claimed in  claim 14 , wherein the can body has a filling volume between 150 ml and 250 ml. 
     
     
         25 . The can body as claimed in  claim 14 , wherein the can body has a height between 85 mm and 145 mm.