Variable printing machine

A variable printing machine comprising:

• a printing cylinder exchangeably mounted on a main frame of the machine, the printing cylinder being exchangeable from one printing cylinder to another, and
• an impression cylinder mounted on said main frame so as to be movable towards and away from the printing cylinder, whereby
• said impression and printing cylinders can be brought into and held in contact with each other to effect printing, in which
• said printing cylinder comprises a shaft and a sleeve adapted to be fitted on the shaft so that the sleeve can be fitted on and can be extracted from the shaft, the machine including:
• a first end bearing member with which said shaft is rotatably supported at a first axial end portion of the shaft in a cantilever structure from said main frame to render said sleeve exchangeable from one sleeve to another, characterized in that the machine includes:
• a turning frame member having a second end bearing member for supporting a second axial end portion of said shaft rotatably, the turning frame member being mounted on said main frame so as to be turnable between
• a first position where it is positioned opposite to a second axial end portion of said printing cylinder and
• a second position where it is separated from the second axial end portion of the printing cylinder so as to render said sleeve extractable from the shaft,
• said second end bearing member, relative to the turning frame member in the first position, being movable axially of the printing cylinder, while maintaining its position parallel to the turning frame member, between
• a support position where the second end bearing member is fitted on, and thereby rotatably supports, the second axial end portion of the shaft and
• a parted position where it is extracted from, and thereby releases support of, the second axial end portion of the shaft,
• wherein the turning frame member configured so as to be immovable between the support position and the parted position and, in the parted position, the turning frame member being parallel to the second axial end portion of the printing cylinder.