US Patent 7099036 Image forming system and image forming method

Print control program, by its constituent portions in cooperation with a scanner apparatus, spools image data sent from the scanner apparatus and controls the print engine etc. of the printer apparatus to print out the spooled image data. The print control program prepares job attribute information used for obtaining the output rate of the printer apparatus, calculates an anticipatory spool amount based on the job attribute information of the printer apparatus thus prepared and job attribute information received from the scanner apparatus, and adjusts timing for printing out the spooled image data.