Polychromatic image forming device

Abstract

Abstract PURPOSE:To obtain sufficient image density and resolution even when a monochromatic image is reproduced by using a photosensitive body which has an insulating layer formed on the surface including a layer consisting of plural kinds of filters, and selecting a specific color image formation mode and a monochromatic image mode optionally. CONSTITUTION:The surface of the photosensitive body 4 is charged electrostatically to a uniform potential and exposed to an image. At the same time, the surface potential of the photosensitive body 4 is uniformed with an alternating current or by a corona discharger 6 which differs in polarity from an accumulator 5 and then the image exposed surface is irradiated uniformly with blue light by a lamp 7B and a blue filter FB to obtain the potential pattern of a complementary color image of blue on the image exposed surface. This is developed by an Y toner developing device 8. Then, the surface potential of the photosensitive body 4 is uniformed by a charger 9Y. Said operation is repeated by using M and C toner particles to obtain a three-color image. Further, developing devices 8Y-8C and chargers 9Y and 9M are turned off, and charging by the charger 5, discharging by the discharger 61, and uniform exposure by image exposing lamps 7B, 7G, and 7R are performed/ and the potential pattern appearing on the entire surface of the photosensitive body 4 is developed by a developing device 8K to obtain a black monochromatic image.

Inventors

• 👤 Hisafumi Shoji
• 👤 尚史 庄司
• 👤 Satoru Haneda
• 👤 羽根田　哲
• 👤 Seiichiro Hiratsuka
• 👤 平塚　誠一郎

Bibliographic Details