Patent ID: 8757063

Claim:
A method of printing, comprising: a printer receiving a print job including a document and header data relating to the document; drawing a first sheet of used paper from a used paper source into a printer having an optical scanner and a print head; using the optical scanner to scan a first face of the first sheet to detect the presence or absence of print thereon; in response to detecting print on the first face of the first sheet, causing the print head to print an obstruction on the first face of the first sheet and print the header data on a second face of the first sheet without scanning the second face of the first sheet; in response to detecting no print on the first face of the first sheet, causing the print head to print the header data of the print job on the first face of the first sheet; drawing a second sheet of paper from an unused paper source into the printer; and printing at least a portion of the document of the print job on the second sheet of unused paper without scanning either face of the second sheet.