Patent ID: 7820302

Claim:
An areal metal element having a surface ( 13 ) which extends from a first outside edge ( 8 ) to a second outside edge ( 9 ) lying opposite the first outside edge ( 8 ), with the region of the metal element adjoining the first outside edge ( 8 ) forming a first side region ( 26 ) and the region of the metal element adjoining the second outer edge ( 9 ) forming a second side region ( 27 ), both said side regions being connected to one another by a central region ( 28 ) lying between them, and with at least one completely bordered aperture ( 22 , 23 ) being formed in at least one of the side regions ( 26 , 27 ), with its border being formed in one part by said side region ( 26 , 27 ) and in the other part by the central region ( 28 ), with the central region ( 28 ) including at least two sections ( 29 , 30 ) which each consist of two outwardly disposed part sections ( 31 , 33 , 34 , 36 ) and a central part section ( 32 , 35 ) lying between them, with the outwardly disposed part sections ( 31 , 33 , 34 , 36 ) being folded over with respect to the central part section ( 32 , 35 ) for the production of the aperture ( 22 , 23 ); with the sections ( 29 , 30 ) forming part of the border of the aperture ( 22 , 23 ); and with the central region ( 28 ), including the sections ( 29 , 30 ), being made in one piece with the two side regions ( 26 , 27 ) of the metal element, characterized in that, in the central region ( 28 ), at least one further section ( 29 , 30 ) is formed for each section ( 29 ; 30 ) and is associated with and of the same type as this section ( 29 ; 30 ), with the sections ( 29 , 29 ; 30 , 30 ) associated with one another being arranged sequentially in a direction from the first side region ( 26 ) to the second side region ( 27 ) and with each of the two outwardly disposed part sections ( 31 , 33 , 34 , 36 ) of one of these sections ( 29 , 30 ) being directly connected to the respective corresponding outwardly disposed part section ( 31 , 33 ; 34 , 36 ) of the other section ( 29 , 30 ) by an areal region ( 24 , 25 ) of the metal element.