| 摘要 |
<p>A transfer roll for use in transferring ink or other medium to a print roll or directly to material that is being printed. The roll has an outer ceramic coating which is ground to provide a relatively smooth surface. A multiplicity of holes or depressions are formed in a ceramic layer by a pulsed laser beam. The depression distribution and volume determines the delivering capacity of the roll. Prior to forming the depressions, the porous ceramic layer can be impregnated with a sealing material to provide an impervious surface. The transfer roll has an extremely hard, durable, abrasion resistant surface and provides a uniform distribution of ink or other medium on the material being printed.</p> |
