| 摘要 |
A sheet reversing and discharging device of the present invention conveys each of a tab sheet and an ordinary sheet in a particular manner. Before a tab sheet enters a reversal tray, a drive roller is driven in the reverse direction while a driven roller is lowered into contact with the drive roller beforehand. The drive roller and driven roller pull in the tab sheet in the direction of conveyance until the tab of the tab sheet moves away from the tip of a path selector. The drive roller and driven roller surely convey the tab sheet to the reversal tray after the tab has moved away from the above tip. Whether or not the tab has moved away from the tip is determined on the basis of a period of time elapsed since a sheet sensor adjoining the inlet of the device has sensed the trailing edge of the tab sheet.
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