A method for conveying sheets, which have been printed in a printing
machine, through a sheet delivery system above a sheet deposit pile by a
sheet conveying device and, at the same time, dusting the sheets with a
powder, and preventing uncontrolled spread of excess powder, includes
interrupting a powder-laden air flow extending in a direction towards the
printing machine along an empty strand of the sheet conveying device in a
housing of the sheet delivery system at least at one interruption location
between a free end of the sheet delivery system and the printing machine,
so that transport of entrained powder in a direction towards the printing
machine is prevented; a prevention device for performing the method; a
sheet delivery system including the prevention device; and a sheet-fed
printing machine in combination with the sheet delivery system.
