Method for recognition of printing sheet led in printer, particularly for recognizing, whether printing sheet is printed or blank, involves inserting optical sensor having transmission unit and receipt unit

摘要

The method involves inserting an optical sensor (2) having a transmission unit (3) and a receipt unit (4). The presence of a color mark located on the printing sheet (1) is determined by the optical sensor. The sheet is printed and a counting pulse is issued with each recognition of a printed or blank sheet. An independent claim is included for a device for recognition of a printing sheet led in a printer, particularly for recognizing, whether the printing sheet is printed or blank.