| 摘要 |
An image forming apparatus includes: a first image forming unit provided at a first stage for executing a print process to a single-side of a sheet, including a first feeding tray; and a second image forming unit provided at a next stage for executing a print process to a single-side of a sheet, including a second feeding tray. These units are connected in series so as to execute single-side or both-sides print process. The apparatus further including a control section which, when a first print process for the sheet fed from the first feeding tray and a second print process for the sheet fed from the second feeding tray are switched based upon print instruction information so as to execute the switched print process, controls an operation state of the first image forming unit depending on an execution condition of the second print process.
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