Patent ID: 8485080

Claim:
A cutting unit for cutting sheet material comprising: a sheet support; and at least one roll cutting device associated with the sheet support, the at least one roll cutting device comprising: a support rail, at which a cutting carriage is movably supported, the cutting carriage comprising a blade support rotatably supported about an axis parallel to the support rail and rotatable by hand, and at which at least two disk blades are supported freely rotatable about blade axes that extend perpendicular to the rotation axis of the blade support, wherein the at least two disk blades are configured to be brought from a respective inactive position into a cutting position protruding in a direction towards the sheet support by rotating the blade support, and wherein a locking device is provided that supports the blade support in a cutting position of a disk blade, wherein the locking device is configured as locking support elements at the support rail and at the blade support, wherein the locking device supports the blade support in a rotational angular position, locking its rotatability when one of the at least two disk blades is in a cutting position, and the support rail includes at least one release portion without any support elements locking the rotatability of the blade support.