A jacket-securing arrangement 270 for mounting in a cylinder for transporting a substrate in a printing system, which cylinder has at least one recess 320 in its outer surface for receiving an inwardly turned edge 229 of a replaceable jacket overlying at least part of the outer surface of the cylinder. The jacket-securing arrangement is mountable within the recess so as not to project beyond the outer surface of the cylinder when the jacket is secured thereto, and includes a clamping lever 275 pivotable about a shaft 351 located within the recess between a clamping position in which the edge of the replaceable jacket is clamped between 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; a magnet 280 retaining the lever in the clamping position. The shaft can be a gripper shaft including a plurality of grippers for securing a printing substrate sheet to the outer surface of the cylinder, the jacker-securing arrangement being disposed between grippers. Methods of installing or replacing a jacket, as well as rotatable impression cylinders and printing systems including such jacket-securing arrangements, are also disclosed.
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