Patent ID: 8671730

Claim:
A method for making a can comprising the steps of: i. providing a cylindrical body; ii. arranging piston means in a first opening of the cylindrical body for defining the diameter of the opening; and iii. curling a free end of the first opening radially outwardly and axially along the cylindrical body thereby forming a curl, wherein the free end of the first opening is provided with a precurl prior to the formation of the curl in step iii), the curling step iii) comprises the forming of the free end of the first opening with the precurl with an elongated curl, a step is formed in the elongated curl, thereby forming an elongated and stepped curl, and the cylindrical body is partly radially stretched up to the free end of the first opening, such that the elongated and stepped curl is formed in a necked portion of the radially stretched cylindrical body, and the elongated and stepped curl lies within an outer imaginary envelope of the radially stretched cylindrical body part.