Variable printing machine

摘要

A variable printing machine for printing images different in top-bottom length with a plate and a blanket cylinder changed in diameter, is provided in which the plate and blanket cylinders and an impression cylinder can be brought into a proper state of contact with one another. Each of a plate cylinder shaft 20 and a blanket cylinder shaft 30 has its one axial end portion supported in a cantilever structure from a main frame 1 of the machine. When the plate cylinder sleeve 21 and the blanket cylinder sleeve 31 are each exchanged with one of different diameter, the blanket cylinder shaft 30 and the impression cylinder 4 are moved relative to each other so that the plate cylinder 2 and the blanket cylinder 3 may be brought into a proper state of contact with each other and so are the blanket cylinder 3 and the impression cylinder 4.

主权项

1. 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 anda 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 anda 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.