In a method or system to archive print images, at least one print image generated with aid of a printing or copying system is recorded with aid of a recording unit. The high priority circuit is operative to communicate high priority information to a single path of a differential serial communication link. The spinning air is then drawn through a conical shroud and fed into a second stage conical separator for separating fine dirt particles and collecting them in an inner substantially cylindrical collection chamber. A conventional printer prints the answer sheet prior to a test administration.