Adjusting one side print data to avoid overlap with the other side print data in two-sided printing

摘要

A print data processing method can generate print data for duplex printing so that the scanning accuracy of a barcode printed on one side of a receipt is not reduced by a logo or other graphic that is printed on the other side of the receipt. Whether or not a linear barcode or other code data B is contained in the front print data D1 that is printed on the front of the receipt is determined, and whether graphic data G is contained in the back print data D2 that is printed on the other side of the receipt is determined. If graphic data G is contained, the back print data D2 is adjusted so that the graphic data G is not printed to a position overlapping the code data B on the opposite side of the receipt.