| 摘要 |
<p>A light emitting sensor (10a) emits light toward sheets (2) carried along a carriage path and the quantity of light transmitted through each to the sheets (2) is detected by a light receiving sensor (10b). A predetermined number of samples of light quantities received by the light receiving sensor (10b) are sampled for each of a plurality of sampling ranges. A multiple feed for each sample range is detected based on light quantity data sampled for each sampling range. A decision of the multiple feed of the sheets (2) is performed based on a plurality of results of the detection of the multiple feed for the plurality of sampling ranges. <IMAGE></p> |
