| 摘要 |
PURPOSE: An original feeding device is provided to extend the span of a sensor and to reduce power consumption. CONSTITUTION: An original feeding device(100) having a sensor for detecting an original by a light emitting element and a light-receiving element is composed of a first detector for detecting presence/absence of a sheet and a second detector capable of being electrically switched between a detection possible condition that the presence/absence of the sheet is detected and a detection impossible condition that the presence/absence of the sheet is not detected. The second sensor is switched to the detection impossible condition when presence of the original is detected by the first detector.
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