Fastening of printing plate on cylinder for rotary printing machine involves clamping member in longitudinal groove in cylinder and areas of increased curvature near groove

摘要

A thin printing plate (02) is stretched over the outer surface of the form cylinder (01). Most of the surface is cylindrical, with a given radius (R) with the center on the axis of rotation. The radius of curvature becomes smaller (r) in the regions approaching the groove and the fastening clamps. As the radius decreases, the center of curvature traces out an evolvent or evolute curve.