Duplex copying machine with air blower for an intermediate tray

摘要

A duplex copying machine that includes an automatic document feeder and a sheet feeder for conveying sheets, which each have an original image copied on one surface, toward a photoreceptor. The sheet feeder blows air on the leading end of the lowermost sheet out of a plurality of sheets set on a sheet tray by way of an air blowing fan to separate the lowermost sheet from the sheets above the lowermost sheet. The amount of air blown by the air blowing fan in situations where the automatic document feeder is not used and the sheets (each having an original image copied on one surface) are being successively stacked on the sheet tray is made smaller than the larger amount of air used in the situation where the sheets are being conveyed.