用于打开折叠纸张的方法，特别是用于其在缝合机器的输送板上的定位的过程涉及沿着分离各个片材的装置移动一叠校样片，直到它们到达其全部打开的点。 分离装置包括吹风空气吸入板，其使相邻片材的自由外角由空气射流的吸引效应引起，并且与堆叠的其余部分分离。 然后将被分离的片材的部分从下一个吹出的空气吸引板导出，以允许下一个校样片打开。

In a method for opening folded printed sheets, in particular for placing on the conveyor saddle a book sewing machine, the printed sheets of institutions are guided past the spreading of the individual parts of sheets in succession up to the opening point. Here, the printing sheet (1) is guided past Blasluftsaugeinrichtungen (3) and sucked the free area of ​​each outer arc parts by the suction effect of the blowing air and spread away from the rest of printed sheets. The spread-sheet part is directed to the suction of a following sheet portion of the active region of a downstream Blasluftsaugeinrichtung.