| 摘要 |
PURPOSE:To prevent the invasion of toner, by providing a filter in an exposure window of a cartridge stored in a drum. CONSTITUTION:A process kit where a photosensitive drum, a charger, a developer, and a cleaner are stored is pulled out from the copying machine main body and is replaced. A color filter 16 having a wavelength selecting characteristic matched to the color of a toner and the characteristic of the photoreceptor is provided in the exposure window of the process kit which becomes the light path for projection of an original image. The process kit is closed by the color filter 16 to prevent the invasion of the toner, and troubles due to the dirt of the filter are eliminated because the color filter 16 is replaced simultaneously with replacement of the process kit when the process kit ends the life. |
