Cylinder apparatus of sheet-fed rotary press

摘要

A cylinder apparatus of a sheet-fed rotary printing press having grippers which are pivotally supported inside a notch in a blanket cylinder brought into rolling contact with a plate cylinder and which is located in a vicinity of the leading edge of a printing plate on the plate cylinder, wherein phases of rotation of the plate and blanket cylinders are arranged such that the leading edge of the printing plate opposes a front end of the notch formed in the blanket cylinder which is located at a slightly advanced position with respect to a leading edge of the blanket, and a cam surface of a cam for opening/closing the grippers is shaped in such a manner that the grippers are kept opened when the leading edge of the printing plate opposes the front end of the notch formed in the blanket cylinder.