Abstract: The invention relates to metal rod with a substantially round cross section comprising at least six rows of ribs arranged in the surface spread over the periphery, the surface of which is preferably provided with six rows of ribs and the ribs of at least one row are optionally arranged obliquely in the surface relative to the rod direction, wherein the ribs of adjoining rows of ribs are optionally oriented in herringbone form.

Abstract: The invention relates to a press such as a folding press and a deep-draw press comprising a press frame with a lower yoke and an upper yoke which are mutually reciprocally movable, wherein the lower yoke and the upper yoke are each provided with co-acting tools and wherein between a yoke and its tool are arranged a curve forming device which comprises a series of curve-forming wedge pairs which lie distributed over the length of the yoke between the yoke and the tool, wherein each curve-forming wedge pair is provided with an apparatus for adjusting the mutual position of the curve-forming wedges of a curve-forming wedge pair.

Abstract: A press that includes a frame which bears a bending device that includes an upper tool and a lower tool which can be moved in a mutually reciprocal manner. The press also includes a curve-forming element for forming a curve on the bending device. The curve-forming element has curve-forming members slidable over each other in a lengthwise direction and a transverse direction and making contact with each other. The contact surface of the curve-forming members in the lengthwise direction and the transverse direction of the bending device possess the respective determined angles of slope .alpha. and .beta.. The press has an element for adjusting the curve-forming members in the lengthwise direction and the transverse direction, wherein the curve-forming members adjoining each other at the sides preferably form a curve-forming strip which extends substantially over the whole length ofthe bending device. This curve-forming strip is preferably provided with a number of discrete contact surfaces.