Device for fixing a cover on a cylinder of a printing unit

In a printing-unit cylinder of a printing machine, a device for fixing a covering to the printing-unit cylinder, the covering having a leading angled-over leg and a trailing angled-over leg, said device comprising:

• a leading channel edge of a tensioning channel defined in the printing-unit cylinder along an axial direction of the printing-unit cylinder for hooking the leading angled-over leg of the covering;
• and
• a spindle arranged in the printing-unit cylinder and running along the axial direction of the printing-unit cylinder, said spindle being pivotable to a tensioning position for tensioning the trailing angled-over leg of the covering, said spindle accommodating a trailing channel edge of the tensioning channel, wherein said spindle is pivotable away from the tensioning position for moving the trailing channel edge away from the leading channel edge.