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Image Forming Apparatus and Control Method for the Same

  • US 20110318078A1
  • Filed: 03/28/2011
  • Published: 12/29/2011
  • Est. Priority Date: 06/24/2010
  • Status: Active Grant
First Claim
Patent Images

1. An image forming apparatus configured to print an image on each side of a sheet by switching back the sheet, comprising:

  • an image forming unit configured to form a developer image on the sheet;

    a fixing unit configured to fix the developer image formed on the sheet by the image forming unit;

    a cooling roller disposed downstream relative to the fixing unit in a sheet feeding direction, the cooling roller being configured to cool the sheet on which the developer image is fixed by the fixing unit;

    an ejection roller disposed downstream relative to the cooling roller in the sheet feeding direction, the ejection roller being configured to eject the sheet onto a catch tray;

    a driving unit configured to rotate the cooling roller and the ejection roller normally or reversely;

    a temperature sensor configured to detect a temperature of the image forming apparatus; and

    a controller comprising a determining unit configured to make a determination as to whether the temperature detected by the temperature sensor is higher than a predetermined temperature, the controller being configured to switch a control mode between a first mode and a second mode based on the determination made by the determining unit as to whether the detected temperature is higher than the predetermined temperature,wherein in the first mode, after the sheet passes through the cooling roller, the controller controls the driving unit to reversely rotate the cooling roller and the ejection roller being rotating normally, andwherein in the second mode, in a state where the cooling roller is nipping the sheet, the controller controls the driving unit to reversely rotate the cooling roller and the ejection roller being rotating normally.

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