Arrangements for securing cylinder jackets

A jacket-securing arrangement for mounting in a cylinder having an outer surface and at least one recess in the outer surface for receiving an inwardly turned edge of a replaceable jacket overlying at least part of the cylinder outer surface, the arrangement comprising:

• a shaft dimensioned to be mountable within the recess;
• a clamping lever pivotable about the shaft between a clamping position in which the edge of the replaceable jacket is clamped between at least a portion of the lever and a side wall of the recess and a release position in which the lever is spaced from the side wall of the recess, the clamping lever being formed of two or more members, at least two of the members being assembled to one another around the shaft and defining between them a bearing surface engaging an outer surface of the shaft, the bearing surface permitting the members of the clamping lever to pivot jointly about the shaft;
• a magnet disposed for retaining the lever in the clamping position;
• and the jacket-securing arrangement being dimensioned to be mountable within the recess so as not to project beyond the cylinder outer surface when the jacket is secured thereto.

A jacket-securing assembly for mounting in a cylinder, which cylinder has an outer surface and at least one recess in the outer surface for receiving an inwardly turned edge of a replaceable jacket overlying at least part of the outer surface of the cylinder, the assembly comprising:

• a shaft dimensioned to be mountable within the recess;
• a plurality of clamping levers mounted for rotation about the axis of the shaft, the levers being spaced from one another along the axis of the shaft and each pivotable about the shaft between a clamping position in which the edge of the replaceable jacket is clamped between at least a portion of the lever and a side wall of the recess and a release position in which the lever is spaced from the side wall of the recess, each of the clamping levers being formed of two or more members, at least two of the members being assembled to one another around the shaft and defining between them a bearing surface engaging an outer surface of the shaft, the bearing surface permitting the members of each clamping lever to pivot jointly about the shaft;
• a plurality of magnets, at least one of the magnets being adapted to retain a respective clamping lever of the levers in the clamping position;
• the assembly being dimensioned to be mountable within the recess so as not to project beyond the cylinder outer surface when the jacket is secured thereto.