Printing apparatus and printing method

A printing apparatus configured to execute a duplex print job which includes printing on both surfaces of a sheet, comprising:

• an input unit adapted to input the duplex print job;
• a printing unit adapted to print on both surfaces of the sheet on the basis of the duplex print job input by the input unit;
• an inversion transport unit adapted to turn over the sheet printed by the printing unit and re-transport the sheet to the printing unit;
• a feeder unit adapted to feed the sheet to the printing unit;
• a sheet output unit adapted to stack the sheet subjected to the print process by the printing unit;
• and
• a control unit adapted to control the printing apparatus to perform printing in either one of an automatic duplex print mode and a manual duplex print mode, the automatic duplex print mode being a mode in which printing is performed on a first surface of a sheet, the sheet is turned over by the inversion transport unit, and printing is performed on a second surface of the sheet, the manual duplex print mode being a mode in which printing is performed on a first surface of a sheet, the sheet is output to the sheet output unit, the output sheet is fed from the feeder unit, and printing is performed on a second surface of the sheet;
• wherein, when all of the pages of the duplex print job are to be printed on sheets of a first attribute, the control unit executes printing in the automatic duplex print mode, and wherein, when the duplex print job contains pages to be printed on sheets of a second attribute different from the first attribute, the control unit executes printing in the manual duplex print mode.

A printing method in a printing apparatus for executing a duplex print job for printing on both surfaces of a sheet, the method comprising:

• an inputting step of inputting the duplex print job;
• a storing step of storing the input duplex print job in a storage unit of the printing apparatus;
• a first printing step of printing on a first surface of a sheet on the basis of the duplex print job and outputting the sheet to a sheet output unit of the printing apparatus;
• a selecting step of selecting a predetermined print job to be printed from among a plurality of print jobs stored in the storage unit;
• and
• a second printing step of printing, when the selecting step selects the duplex print job including a sheet with the first surface printed in the first printing step as the predetermined print job, on a second surface of the sheet with the first surface printed in the first printing step and outputting the sheet to the sheet output unit.

A printing method in a printing apparatus for executing a duplex print job for printing on both surfaces of a sheet, the method comprising:

• an inputting step of inputting the duplex print job;
• a first printing step of printing on both surfaces of the sheet on the basis of the duplex print job input in the inputting step in an automatic duplex print mode in which a first surface of a sheet is printed, the sheet is turned over by a duplex transport mechanism of the printing apparatus, and a second surface of the sheet is printed;
• a second printing step of printing on both surfaces of the sheet on the basis of the duplex print job input in the inputting step in a manual duplex print mode in which a first surface of the sheet is printed, the sheet is output to a sheet output unit of the printing apparatus, the output sheet is fed from a feed unit of the printing apparatus, and a second surface of the sheet is printed;
• and
• a controlling step of controlling the printing apparatus to print the duplex job in the first printing step when all of the pages of the duplex print job are to be printed on sheets of a first attribute and controlling the printing apparatus to print the duplex job in the second printing step when the duplex print job contains pages to be printed on sheets of a second attribute different from the first attribute.