| 摘要 |
Holes are formed at positions corresponding to the edge position of a recording medium that is mounted on the mounting portion of a tray, so that light reflectivities from the holes relative to the recording medium differ. As for the main scanning direction, the holes are located at positions symmetrical to the centering position for the mounting portion in the main scanning direction, and as for the sub-scanning direction, located near the recording start position for the recording medium, relative to the centering position for the mounting portion in the sub-scanning direction. With this arrangement, after the holes have been detected and the centering position for the recording medium in the main scanning direction has been detected, the sub-feeding distance whereat the tray is to be moved to the search position can be shortened, and the shifting of the centering position for the recording medium due to the skewed feeding of the tray can be reduced or prevented.
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