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    • 10. 发明授权
    • Image forming apparatus which detects a jam of a wound sheet
    • 检测卷绕片材卡纸的图像形成装置
    • US5365322A
    • 1994-11-15
    • US152378
    • 1993-11-16
    • Tatsuo HamadaNobukazu Adachi
    • Tatsuo HamadaNobukazu Adachi
    • B41J13/00B41J29/00B65H7/06G03G15/00G03G15/20G03G21/00
    • G03G15/70G03G15/2028G03G15/6582G03G2215/00548
    • An image forming apparatus includes an image bearing member, a transfer unit for transferring an unfixed image on the image bearing member onto recording material, and a fixing rotating member for fixing the unfixed image while grasping and conveying the recording material supporting the unfixed image. The apparatus further includes a first detector, provided at a side downstream from a grasping portion of the fixing rotating member in the moving direction of the recording material, for detecting the recording material, and a second detector, provided at a side upstream from the grasping portion of the fixing rotating member in the moving direction of the recording material, for detecting the recording material. The distance between the first and second detectors is less than the minimum length in the conveying direction of ordinary recording material used in the apparatus.
    • 图像形成装置包括图像承载部件,用于将图像承载部件上的未定影图像转印到记录材料上的转印单元,以及用于固定未定影图像的定影旋转部件,同时抓住并传送支撑未定影图像的记录材料。 该装置还包括:第一检测器,设置在记录材料的移动方向上的固定旋转部件的把持部的下游侧,用于检测记录材料;以及第二检测器,设置在抓握部的上游侧 在记录材料的移动方向上的固定旋转部件的一部分,用于检测记录材料。 第一和第二检测器之间的距离小于在装置中使用的普通记录材料的输送方向上的最小长度。