Image forming apparatus, image forming method, and computer-readable recording medium which performs duplex printing and inserts blank sheet images

摘要

An image forming apparatus prints print image data including both a duplex printing instruction and a simplex printing instruction while reducing or eliminating the development of a sheet interval. When it is determined that a print request includes both a duplex printing instruction and a simplex printing instruction, the maximum number N of transfer sheets that can be placed on a transport path is determined, and an order of output of print images is determined based on the maximum interleave number N. A blank sheet image is inserted in accordance with a switch timing from duplex printing to simplex printing.