PLATE CYLINDER AND PLATE MOUNTING DEVICE

摘要

Provided is a stopper for reliably preventing shifting of a cylindrical printing plate mounted on a plate cylinder. A plate cylinder (1) has a plate-mounting surface (12) onto which a cylindrical printing plate (3) is fitted from the front end and mounted. A front stopper (4) is provided on the edge of the front end. The front stopper (4) is configured so as to be able to switch between a protruding orientation in which at least a portion of the stopper is positioned so as to protrude to the outside of the plate-mounting surface (12) in the radial direction and a retracted orientation in which the entire stopper is positioned to the inside of the plate-mounting surface (12) in the radial direction.