Abstract: A method for controlling the stretching of rolling stock, particularly of pipes, by way of a pilot control system for the rolling stock taking into consideration measured physical values of the rolling stock. In order to be able to adjust the pilot control system as accurately as possible, in addition to or instead of an optical temperature measurement, the temperature in the interior of the rolling stock is determined by an integral measurement of a physical quantity proportional to this temperature and is superimposed as a signal on the pilot control system.

Abstract: In a matrix pin print head, the armatures (15a) of the magnet drive (12), transferring the advance motions to the print pin, rest in each case against the print pin (4). The print pin (4) and the print pin head (22) form a rigid connection. In order to reduce friction and wear, the print pin head (22) is made of a technical ceramic material at the print pin end (21) and the print pin head (22) is formed as a molded piece (23). The print pin end (21) is adhesively attached in, pressed into, or sintered into the interior of the molded piece (23). The connection length (25) between the print pin and the print pin head corresponds at to at least twice the diameter (26) of the print pin (4).