Image Forming Apparatus and Control Method for the Same
First Claim
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.
1 Assignment
0 Petitions
Accused Products
Abstract
An image forming apparatus is provided, which includes a fixing unit, a cooling roller disposed downstream relative to the fixing unit in a sheet feeding direction, an ejection roller disposed downstream relative to the cooling roller in the sheet feeding direction, a driving unit rotating the cooling roller and the ejection roller normally or reversely, and a controller including a determining unit determining whether a detected temperature is higher than a predetermined temperature, the controller switching between a first mode to, after a sheet passes through the cooling roller, control the driving unit to reversely rotate the cooling roller and the ejection roller being rotating normally and a second mode to, in a state where the cooling roller is nipping the sheet, control the driving unit to reversely rotate the cooling roller and the ejection roller being rotating normally, based on the determination of the determining unit.
16 Citations
16 Claims
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1. An image forming apparatus configured to print an image on each side of a sheet by switching back the sheet, comprising:
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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, and wherein 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. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A control method for controlling an image forming apparatus configured to print an image on each side of a sheet by switching back the sheet, the image forming apparatus comprising:
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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; and 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, the control method comprising the steps of; detecting a temperature of the image forming apparatus; making a determination as to whether the detected temperature is higher than a predetermined temperature; and switching a control mode between a first mode and a second mode based on the determination 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 cooling roller and the ejection roller being rotating normally are controlled to reversely rotate, and wherein in the second mode, in a state where the cooling roller is nipping the sheet, the cooling roller and the ejection roller being rotating normally are controlled to reversely rotate. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16)
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Specification