Device for mounting a sheet-like roller cover on a roller

A device for mounting a sheet-like, flexible roller cover, such as a printing plate, around the surface area (103) of a roller (10), such as a printing cylinder, wherein the roller (10) is rotatable about a rotational axis (100), said device comprising

• a first rail (11) that extends parallel to the rotational axis (100) of the roller (10) and is arranged in an area defined by the surface of the roller (10),
• a second rail (12) that extends parallel to the rotational axis (100) of the roller (10), is arranged in the area defined by the surface of the roller (10) and composed of a plurality of partial rails (44), wherein
• the first rail (11) and the second rail (12) respectively have an undercut (45) for accommodating the roller cover in a form-fitting manner, and wherein
• the first rail (11) and the second rail (12) are spaced apart from one another by a variable distance (70) in the circumferential direction of the roller (10), as well as
• at least two tensioning units (4) that are spaced apart from one another in the direction of the rotational axis (100) of the roller (10) and respectively comprise a slide (40) that is movable in the circumferential direction of the roller (10), a drive (42) operatively connected to the slide (40) and one of the plurality of partial rails (44) that is arranged on the slide (40) and forms part of the second rail (12),
• wherein a lock (58) is arranged opposite of at least one of the plurality of partial rails (44), wherein the lock (58) alternately has an open arrangement (300) and a closed arrangement (301) with respect to the at least one associated partial rail (44) and forms a closable receptacle together with the at least one partial rail (44).