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    • 4. 发明申请
    • Heating device and fixing apparatus having the same
    • 加热装置和具有该装置的定影装置
    • US20070065190A1
    • 2007-03-22
    • US11370824
    • 2006-03-09
    • Dong-Jin SeolJae-Hyeuk Jeong
    • Dong-Jin SeolJae-Hyeuk Jeong
    • G03G15/20
    • G03G15/2053
    • A heating device suitable for use in an image forming apparatus and a fixing apparatus having the same. The heating device comprises heating roller having a double-layered structure of a magnetic layer and a non-magnetic layer; a heat generation unit installed on the inner peripheral surface of the heating roller; a first insulation layer for insulating the heating roller and the heat generation unit; an internal tube installed on the inner peripheral surface of the heat generation unit so that the heat generation unit can be tightly contacted with the heating roller; and a second insulation layer for insulating the heat generation unit and the internal tube. The heating device can make the temperature of the heating roller equalized and maximize the power efficiency because the heating roller has a double-layered structure of a magnetic layer and a non-magnetic layer and the heat generation unit is tightly contacted with the heating roller. The inventive fixing apparatus is provided with such a heating device.
    • 适用于图像形成装置的加热装置和具有该加热装置的定影装置。 加热装置包括具有磁性层和非磁性层的双层结构的加热辊; 安装在加热辊的内周面上的发热体单元; 用于使加热辊和发热单元绝缘的第一绝缘层; 安装在发热体的内周面的内管,使得发热体能够与加热辊紧密接触; 以及用于绝热发热单元和内管的第二绝缘层。 加热装置可以使加热辊的温度均匀化并且由于加热辊具有磁性层和非磁性层的双层结构并且发热单元与加热辊紧密接触而使功率效率最大化。 本发明的定影装置设置有这种加热装置。