| 摘要 |
PURPOSE:To selectively execute both the positive copying and the negative copying, by switching the latent image forming process by means of a switch. CONSTITUTION:The swit has provided a photo conductive material layer 1b and an electric insulating layer 1c on the drum cylinder 1a made of aluminum is used as a photo sensitive body 1. Around the photosensitive body 1, apparatuses of the first- the sixth process are placed in accordance with its copying process. That is to say, the apparatuses to be placed are a primary corona charger (positive polarity) 2 as the first process apparatus, a corona charger 3 as the second process apparatus which executes charging of the opposite polarity to the first process, a short focus lens array 4 as the third process apparatus for exposing optical image on the photo sensitive body, a corona charger 5 as the fourth process apparatus which executes charging of the same polarity as the second process, the fifth process apparatus 6 for equally exposing the whole surface, and a developing equipment (positive charging insulating toner is used) 7 as the sixth process. A negative or positive visible image is used by selecting the processes 1-6, and the processes 1, 2, 3, 6 by switching the switch 12. |
