Cross cutting device and method for operating such a cross cutting device

A cross cutting device for manufacturing cut-out portions from a flat material web that is moved in a direction of transportation, 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;
• 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,
• 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, and
• an interior of the second rotational element contains a plurality of chambers that are separated from one another and that are continuously connected to one zone each, and whose connection to the suction device can be interrupted for at least some of the chambers;
• and
• a control device with which the connection of the zones to the suction device can be cleared or interrupted as a function of a format of the cut-out portion, wherein:
• the control device contains a control element that is arranged between a connecting element for the suction device and entries to the zones, the control element being able to assume different positions relative to the entries and being shaped in such a way that, depending on a position of the control device, the control device clears or interrupts one or more entries,
• the entries are arranged on an end face of the second rotational element, in each case at a same distance from a rotational axis, and
• the control element comprises a control cam that can be rotated about a rotational axis and has a plurality of continuous cutouts that can be placed in congruence with some of the entries or all the entries.

A cross cutting device for manufacturing cut-out portions from a flat material web that is moved in a direction of transportation, 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;
• 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,
• 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, and
• an interior of the second rotational element contains a plurality of chambers that are separated from one another and that are continuously connected to one zone each, and whose connection to the suction device can be interrupted for at least some of the chambers;
• and
• a control device with which the connection of the zones to the suction device can be cleared or interrupted as a function of a format of the cut-out portion, wherein:
• the control device contains a control element that is arranged between a connecting element for the suction device and entries to the zones, the control element being able to assume different positions relative to the entries and being shaped in such a way that, depending on a position of the control device, the control device clears or interrupts one or more entries, and
• the control device has means for automatically changing the position of the control element.