| 摘要 |
PURPOSE:To execute a development free from a color mixture, a disorder, etc. by providing in parallel the first and the second developing units, and constituting them so that a magnetic force of a carrier of a developer of the first developing unit is stronger than a magnetic force of a carrier of a developer of the second developing unit. CONSTITUTION:An electrostatic charge use electrifier 8, an optical system 9, a two color developing device 10, a transfer use electrifier 11, a peeling use electrifier 12, a cleaning device 13, a destaticizing lamp 14, etc. are arranged successively on the periphery of a photosensitive drum 7. The developing device 10 consists of the first and the second developing units 321, 322, and a developer used by the first developing unit 321 contains a carrier (for instance, >=50emu/g) whose magnetic force is stronger than that of a developer used by the second developing unit 322. |
