Method for assembling or removing a hollow cylinder on or from a further cylinder

A method for removing a hollow cylinder from a further cylinder, wherein the hollow cylinder comprises a cylindrical body in which openings for creating an air cushion are arranged within a first portion of a shell and a second portion of the shell is designed to be gas-impervious or has openings, for creating an air cushion, of a reduced quantity and/or size compared to the first portion, wherein the openings in the first portion of the shell is connected to at least one gas feed, which is connected to at least one gas inlet on the inside of the cylindrical body, and wherein the further cylinder has openings on a shell and gas can be fed through the openings in the further cylinder via an internal gas supply,

• wherein the method for removing comprises the following steps:
• a) the provision of an arrangement in which the hollow cylinder is placed on the further cylinder,
• b) the application of a seal to the first portion of the shell of the hollow cylinder so as to prevent or reduce an escape of gas from the first portion of the shell,
• c) the application of gas to the further cylinder so that gas escapes from the openings in the further cylinder, and
• d) the removal of the hollow cylinder from the further cylinder.