| 摘要 |
An image forming apparatus having image forming structure for visualizing image data read out by image reading structure and forming it onto sheets of transfer materials; post-processing structure for executing a post-process including a stapling process, a folding process, and/or a sorting process in order to execute a book-binding process to the transfer materials on which the image data has been formed; and a trimmer for executing a trimming process to a bundle of the transfer materials subjected to the binding process by the post-processing structure, wherein when the trimming process by the trimmer is executed, the image forming structure sets for each sheet of the transfer materials a non-image forming area including a processing portion to which the trimming process is executed and a valid image forming area excluding the non-image forming area onto the transfer material and forms the image data read out by the image reading structure into the valid image forming area of the transfer material.
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