| 摘要 |
PROBLEM TO BE SOLVED: To facilitate the handling of a photoreceptor cartridge and a developing cartridge in the case of exchange. SOLUTION: As for the photoreceptor cartridge 3, a photoreceptor drum 13 is rotatably arranged on an inside space surrounded by the bottom wall 30a, the upper wall 30b, and the side walls 30c and 30c of a case 30 as a housing, on the other hand, the developing cartridge 4 having a developing roller 14 for supplying the developer to the drum 13 can be attachably/detechably housed in a housing part 32 which is formed on the other side of the case 30 and whose upper part is opened.
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