| 主权项 |
1. Method for the production of a can, said can comprising two circular end elements (4, 5), forming the base and the lid, the first one (4) of said circular end elements having substantially a same size as the second one (5), and a polygonally prefolded can sleeve closed all around which has fold lines (14) oriented parallel to its longitudinal axis, said fold lines forming edges (1) over their entire length, the can sleeve (2) having a circular cross-sectional area at both ends and a polygonal cross-sectional area in its central region, wherein the polygonal cross-sectional area in the central region is at least hexagonal and at most decagonal, wherein individual segments between the fold lines arch inwards and the edges formed by the fold lines arch outwards,
wherein a can sleeve (2) having edges (1) parallel to the can axis, which is closed all round and present in a polygonally prefolded form, is folded out and initially brought into a circular shape at an opening and is provided with a circular first end element (4), whereupon, after filling of the can, the can sleeve (2) is also brought into a circular shape at its other opening and is provided with a circular second end element (5), wherein a can sleeve (2) having at most a decagonal cross-sectional area is used and the circular shape is achieved by at least one of drawing the can sleeve (2) onto a cylindrical intermediate shaping mandrel (3), which is pulled off again after mounting of the first end element (4), or by applying at least two intermediate shaping jaws (6) from the outside. |
