To enable the initial operation of production or the changeover to another products in a short period of time and to enable a line operator to easily carry out the operation or changeover in the absence of a skilled person by prescribed operatively setting the operating parameters of auxiliary members relating to the properties of the sheet metal to be processed.

Adjustable stack supports 6 and 18, a separating and detaining part 28, a separating air supplying member 22 and a spacer member 5 constituted as an adjusting screw are arranged in a frame 4 which is easily removable from a separating device. Then, a module which can be stored with the resulted setting is formed. The resulted magazine setting is held in the case of a temporary change of dimensions. Such module may be obtained relating to the respective formats predetermined for production. In such a case, the changeover of the module may be easily and rapidly carried out by the not so much qualified operator and the induction of a long downtime does not occur.