| 摘要 |
PURPOSE:To apply always uniform electric charge by performing electric charging of a printing master in printing cycle with a roll. CONSTITUTION:A printing master 10' secured with a toner image 16 on a photoconductive plate is formed, and electric charging is carried out on said printing master with a conductive bias roller 17 or a dielectric roller having beforehand been applied uniformly with electric charge on the surface by Corotron charging. |
