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    • 17. 发明申请
    • IMAGE FORMING APPARATUS AND CONTROL METHOD THEREFOR
    • 图像形成装置及其控制方法
    • US20080253818A1
    • 2008-10-16
    • US12100320
    • 2008-04-09
    • Ichiro SASAKINaohisa NAGATAAkinobu NISHIKATASatoru YAMAMOTOHiroshi MATSUMOTO
    • Ichiro SASAKINaohisa NAGATAAkinobu NISHIKATASatoru YAMAMOTOHiroshi MATSUMOTO
    • G03G15/00
    • G03G15/238G03G2215/00599G03G2215/00603
    • An image forming apparatus that can satisfy productivity at the time of double-sided image formation without jamming due to a collision of a succeeding sheet with a preceding sheet, and without upsizing of the apparatus. The image forming apparatus performs a sheet circulation transport for circulating and transporting a sheet to an image forming unit to perform image formation on both a first side and a second side of the sheet. The sheet is fed to the image forming unit at a predetermined image formation start timing for the first side image formation. The first side image-formed sheet is reversed, and re-fed to the image forming unit for the second side image formation while causing the first side image-formed sheet to wait at least one of sheet waiting positions. A full state where all the sheet waiting positions are full of the first side image-formed sheets is detected. The sheet feeding unit is controlled so that the number of sheets on which the sheet circulation transport is performed is greater than the number of the sheet waiting positions. When the full state detecting unit detects the full state, the sheet re-feeding unit is controlled so that a head sheet among the first side image-formed sheets waiting at the sheet waiting positions is fed in advance of the predetermined image formation start timing.
    • 一种图像形成装置,其能够满足双面图像形成时的生产率,而不会由于后续纸张与前一张纸的碰撞而卡住,并且不会使装置升高。 图像形成装置执行用于将片材循环和输送到图像形成单元的片材循环传送,以在片材的第一侧和第二侧上进行图像形成。 在第一侧面图像形成的预定图像形成开始定时,将片材馈送到图像形成单元。 第一侧图像形成片材被反转,并且在使第一侧成像片材等待片材等待位置中的至少一个的同时,将其重新馈送到用于第二侧面图像形成的图像形成单元。 检测所有纸张等待位置充满第一侧图像形成纸张的完整状态。 控制片材进给单元,使得进行片材循环传送的片材的数量大于片材等待位置的数量。 当全状态检测单元检测到完全状态时,控制纸张再进给单元,使得在预定图像形成开始定时之前馈送在纸张等待位置等待的第一侧成像纸之间的打印头纸。