Patent ID: 7798039

Claim:
A method for operating a cross cutting device for manufacturing cut-out portions from a flat material web that is moved in a direction of transportation, the cross cutting device comprising: a first cross cutting unit for the flat material web, said first cross cutting unit having a first fixed blade and a first rotating blade arranged on a first rotational element; and a second cross cutting unit for the flat material web, said second cross cutting unit being spaced apart from said first cross cutting unit in the direction of transportation and having a second fixed blade and a second rotating blade arranged on a second rotational element, wherein: the second rotational element can be connected to a suction device such that a cut-out portion is at least temporarily secured on the second rotational element, and the second rotational element contains, along a circumferential face, a plurality of zones to which suction air can be applied individually and/or in combination in order to secure cut-out portions of different formats, the method comprising: selecting the zones of the second rotational element in accordance with a format of the cut-out portion; and correspondingly clearing or interrupting entries to the zones, wherein: blown air is applied to a region of the second fixed blade in such a way that the section is pressed against the second rotational element, and a direction of the blown air is changed in the region of the second fixed blade after a separation of the section, in such a way that the subsequent flat material web is drawn away from the second rotational element.