| 摘要 |
An image forming apparatus includes at least one image bearing member on which a visible image is formed, an intermediary transfer member onto which visible images of different colors formed on the at least one image bearing member are transferred to be superimposed one upon another, thereby forming a first image thereupon, and an installing part provided in a main body housing of the apparatus and configured such that either of at least two intermediary image bearing members different in size and respectively configured such that when installed in the installing part of the main body housing of the apparatus, the first image on the intermediary transfer member is transferred thereupon, can be installed therein in a detachable manner. The image forming apparatus is configured such that when the either of at least two intermediary image bearing members different in size is installed in the installing part of the main body housing of the apparatus, the first image on the installed either of at least two intermediary image bearing members is transferred onto one side of a recording medium and a second image formed on the intermediary transfer member by another visible images subsequently transferred from the at least one image bearing member being superimposed one upon another is transferred onto the other side of the recording medium. <IMAGE>
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