Abstract: A method of printing on a sheet of recording medium included in a randomly oriented stack of recording media provided to a printing apparatus, the method comprising: a) using a scanning element disposed in a printing path of the printing apparatus to scan a first side of the sheet of recording medium to provide scan data; b) analyzing the scan data to determine whether the first side has previously been marked on; and c) making a predetermined indicator on the first side of the sheet of recording medium if it is determined that the first side has previously been marked on.

Abstract: A printing apparatus includes a print media input holder; a print region; at least one media transport element for moving sheets of recording medium from the print media input holder to the print region; a scan element disposed along a printing path; and a print media output holder; and a controller including: a selectable media sort mode that includes: using the scan element to determine whether a sheet of recording medium has marks on a first side of the sheet; and moving the sheet of recording medium to a first location or a second location depending on whether the first side of the sheet is determined to have marks on it; and a selectable printing mode that does not include determining whether the sheet of recording medium has marks on it.

Abstract: A method of printing on a sheet of recording medium included in a randomly oriented stack of recording media provided to a printing apparatus, the method comprising: a) using a scanning element disposed in a printing path of the printing apparatus to scan a first side of the sheet of recording medium to provide scan data; b) analyzing the scan data to determine whether the first side has previously been marked on; and c) making a predetermined indicator on the first side of the sheet of recording medium if it is determined that the first side has previously been marked on.

Abstract: A printing apparatus includes a print media input holder; a print region; at least one media transport element for moving sheets of recording medium from the print media input holder to the print region; and a scan element disposed along a printing path; and a controller including: a first selectable printing mode that includes: using the scan element to determine whether a first side of a sheet of recording medium has marks on it; and printing on the first side of the sheet if it is determined that the first side does not have marks on it; and a second selectable printing mode that does not include determining whether the sheet of recording medium has marks on it.