Patent ID: 8893619
Filing Date: 2014-11-25
Classification: B41F,B41M

Abstract:
1. A method for printing on a curved surface, comprising the steps of: applying printing ink to a protrusion portion of a relief printing master plate which is a flat plate with the protrusion portion 0.1-15 μm high in height h; pressing a rubber or rubbery roll-like elastic blanket onto the relief printing master plate disposed in a fixed position and supplied with the printing ink while applying constant pressure to the roll-like elastic blanket and smoothly rotating the roll-like elastic blanket, so as to transfer the printing ink to an outer circumferential surface of the roll-like elastic blanket; and moving the roll-like elastic blanket having the printing ink transferred thereto, and bringing the roll-like elastic blanket into rotational pressure contact with a surface of a to-be-printed curved surface body so as to perform printing thereon, wherein a radial thickness T of the roll-like elastic blanket has at least a relation of 2H≦T≦8H to a level difference H among irregularities in the curved surface of the to-be-printed curved surface body, a material of the roll-like elastic blanket is silicone rubber, and hardness (JIS A-scale) thereof is 3-20, surface roughness of the roll-like elastic blanket is 0.5-2 μmin Hmax, and the printing ink is a UV ink having a viscosity of 5-250 PaS (at 25° C.).