公开(公告)号：US20080285996A1

公开(公告)日：2008-11-20

申请号：US12117022

申请日：2008-05-08

申请人： Satoshi Kinouchi ,  Osamu Takagi ,  Yoshinori Tueda ,  Toshihiro Sone ,  Koichiro Saito

发明人： Satoshi Kinouchi ,  Osamu Takagi ,  Yoshinori Tueda ,  Toshihiro Sone ,  Koichiro Saito

IPC分类号： G03G15/20

CPC分类号： G03G15/2039 ,  G03G2215/2032

摘要： A fixing device includes a heat roller having a degaussing alloy material, an induction heating member for exciting the heat roller, an inverter circuit for giving power at a predetermined frequency to the induction heating member, and a control unit, and when driving at a first drive frequency and fixing small size sheets by continuous passing, a local temperature rise occurs at an end part of the heat roller, and the end part approaches the Curie temperature, and when impedance of the inverter circuit reduces and an excessive current flows in the circuit, the fixing device drives at a higher second drive frequency, thereby increases a resistance of the heat roller by an epidermal effect of magnetic flux, increases an apparent resistance of the inverter circuit, makes it possible to use a flowing current within a normal range, heating a central part of the heat roller, and continues the fixing.

摘要翻译： 定影装置包括具有消磁合金材料的加热辊，用于激励加热辊的感应加热部件，向感应加热部件以规定频率供给的逆变器电路，以及控制部， 驱动频率和连续通过固定小尺寸片材时，在加热辊的端部发生局部温度升高，并且端部接近居里温度，并且当逆变器电路的阻抗减小并且电路中流过的电流过大时 固定装置以较高的第二驱动频率驱动，从而通过磁通的表皮效应增加加热辊的电阻，增加逆变器电路的视在电阻，可以使用在正常范围内的流动电流， 加热加热辊的中心部分，并继续固定。