LETTERPRESS, MANUFACTURING PROCESS OF LETTERPRESS, AND PRINTING APPARATUS OF CAN

摘要

PROBLEM TO BE SOLVED: To provide a letterpress, a manufacturing process of the letterpress and the printing apparatus of the can using this letterpress that can control the dot gain of the points printed by the projection of the letterpress to be smaller and can attain the high resolution printing. SOLUTION: The invention refers to the letterpress 30 mounted on the periphery of the plate cylinder to be used in the printing apparatus of the can having a round columnar plate cylinder and the blanket to which an ink applied on this plate cylinder is to be transferred, and is characterized in that, with this letterpress 30 being mounted on the periphery of the plate cylinder, a solid section 31 located at the most radially outward part, the bottom foundation section 33 recessed radially inward from this solid section 31 and the dot section 32 containing the projection 34 having an approximate figure of the frustum of cone projecting radially outward from this bottom foundation section 33 are formed, and in that the radial distance H1 between the solid section 31 and the top section 34A of the projection 34 is set within the range of 0μm