| 摘要 |
<p>A transmission type photosensor (20) is opposed to a label sheet (5) conveyed by a sheet conveyor (6), and a label position is detected from the output value of the sensor (20). A reflection type photosensor (21) is opposed to a tag sheet conveyed by the sheet conveyor (6), and a tag position is detected by the output value of the sensor (21). When the detection timing of the label or the tag falls outside the allowable range set in advance, the sheet is judged to be defective. In this case, an examination is performed by evaluating either the level of the output value of the reflection type sensor for detecting the tag position (in the case of the label sheet) or the level of the output value of the transmission type photosensor for detecting the label position (in the case of the tag sheet). The label sheet is judged as finished when the output value of the reflection type photosensor is low, while the tag sheet is judged as finished when the output value of the transmission type photosensor is high. Accordingly, defects can be clearly distinguished from the completion of transfer.</p> |
