| 摘要 |
<p>NEW MATERIAL:To eliminate turbulence of alignment property by comparing the size of a paper sheet discharged from an image forming device main body with the size of a paper sheet directly before charging, prohibiting image forming process in the main body when the size is changed from a small one to a large one, and preventing to load a large paper sheet on a small one. CONSTITUTION:When no paper sheet on an upper tray 70 is detected with a sensor SE2, prohibition of printing is released, a paper sheet is printed and received on the upper tray 70. Nextly, the size of this paper sheet is compared with the size of a paper sheet herefrom to be printed, at no change the new one is processed for printing, and received on the tray 70. If there is change, it is received on a lower tray 70a. When there is a paper sheet in the lower tray 70a, the size of this paper sheet is compared with the size of the paper sheet herefrom to be printed, and if the latter is larger, printing process is prohibited. Consequently, a large size paper sheet is not loaded on small one, and alignment property of the paper sheet is not disturbed.</p> |
