| 摘要 |
PURPOSE:To permit the conversion of the density to be copied according to the color of the image of an original by installing freely insertably color filters into the optical path of the light reflected from the original to expose a photosensitive body. CONSTITUTION:A filter holder 12 is freely movably installed between a near parabolic optical transmission body 3 and a photosensitive belt 1. Three slits 12a, 12b, 12c are opened to the holder 12. The red absorptive filter 13 and the blue absorptive filter 14 are respectively packed into the slits 12a, 12b, 12c positioned on the right and left. The image formed on blue section paper is copied. The operator sets a lever 12d to the position R and copies the image if the operator desires to erase the blue section from the copied image. The exposing ray of the original is then transmitted through the filter 13 and is formed on the belt 1 and therefore the image has the blue ground color. The blue section does not appear on the copied image. A reverse operation may be executed to make reverse emphasis. |
