COPYING DEVICE

PURPOSE:To prevent the generation of fogging in a photosensitive material during conveyance and to obtain an image having high quality by conveying the photosensitive material from a cartridge to an exposing part and from the exposing part to a developing processing part in a dark box via a light shielding box which is opened only in the exposing stage to an optical system which obtains original information from original platen glass. CONSTITUTION:The original information on the original platen glass 2 of a copying device body 1 is obtd. by the optical system 5. The light shielding box 3 having a shutter 8 which can be opened only in the exposing stage is disposed to such optical system 5. The photosensitive material 6 is conveyed by a conveyance system 35 from the cartridge to an exposing window 7 and from the exposing window 7 to the developing processing system 41 in the upper and lower dark boxes 37, 39 which are optically insulated via the light shielding box 5. The photosensitive member 6 conveyed from the cartridge 18 is cut to a desired size by a cutter 36 and is housed into a temporarily housing chamber 38. The photosensitive material is then lowered while the material is exposed by the window 7 from the chamber 38 and after the material is returned from the descending point into the chamber 38, the material is conveyed into the developing processing system 41. The fogging of the photosensitive material 6 during the conveyance is thus prevented.