The invention provides an apparatus for the mounting and/or demounting of
at least two printing sleeves outside a printing unit of a printing
machine. The printing sleeves include an outer printing sleeve forming a
printing surface and an inner printing sleeve providing diameter
compensation between the outer printing sleeve and an impression cylinder
of the printing machine. The apparatus having a reception device onto
which an inner printing sleeve can be pushed for mounting the two
printing sleeves. The apparatus having at least one compressed-air device
for facilitating the fixing of the inner printing sleeve on the reception
device and for conducting compressed air through orifices assigned to the
inner printing sleeve in order thereby to make it possible for an outer
printing sleeve to be pushed more easily onto the inner printing sleeve.