Patent ID: 8371495

Claim:
A pre-rounding element or a rounding element in a rounding apparatus comprising: a substantially rigid upper element part which is formed to be attached at the rounding apparatus by means of attachment members, or which is formed by an apparatus-fixed part of the rounding apparatus, a lower element part designed for acting upon the metal sheets to be rounded, which are located in the rounding apparatus, a joint arrangement by means of which the lower element part is connected to the upper element part in an articulated way, as well as at least an actuating element by means of which the lower element part is deflectable in such a way that metal sheets to be rounded can be actuated differently by the lower element part, wherein the joint arrangement includes a solid body joint between the upper element part and the lower element part and a separating gap extending from the solid body joint such that an end of the separating gap is located opposite of the solid body joint and above the joint with respect to the horizontal direction.