| 摘要 |
PROBLEM TO BE SOLVED: To switch delivery methods by controlling to deliver a printed printing recording medium through a predetermined delivery port in a selected delivery method. SOLUTION: In printing to both faces, a printing request is relayed to a perfect printing queue in the order from a P2 to a P4 to a P1 to a P3. Printing the P2 is carried out to one face of a printing recording medium PM1 at a first feed and transfer, and at the same time, printing the P4 is carried out to one face of a printing medium PM2. At a re-feed and transfer, printing the P1 is conducted to the other face of the printing recording medium PM1 and printing the P3 is carried out to the other face of the printing recording medium PM2. The paper is delivered. When a delivery method is switched to a face up, the P2 and P4 are printed to the other faces of the printing recording media PM1 and PM2 respectively at a first feed and transfer and the paper is delivered in the face up method.
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