发明授权
US5512993A Image heating device capable of controlling activation of plural heaters
失效
能够控制多个加热器的激活的图像加热装置
- 专利标题： Image heating device capable of controlling activation of plural heaters
- 专利标题（中）： 能够控制多个加热器的激活的图像加热装置
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申请号： US331873申请日： 1994-11-01
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公开(公告)号： US5512993A公开(公告)日： 1996-04-30
- 发明人: Saijiro Endo , Yoshikuni Toyama , Hisaaki Senba , Hisatsugu Tahara , Hiroshi Matsumoto , Keisuke Hasegawa
- 申请人： Saijiro Endo , Yoshikuni Toyama , Hisaaki Senba , Hisatsugu Tahara , Hiroshi Matsumoto , Keisuke Hasegawa
- 申请人地址： JPX Tokyo
- 专利权人： Canon Kabushiki Kaisha
- 当前专利权人： Canon Kabushiki Kaisha
- 当前专利权人地址： JPX Tokyo
- 优先权： JPX4-104016 19920331; JPX4-191375 19920626; JPX4-191376 19920626; JPX4-173267 19920630; JPX4-173268 19920630; JPX4-179894 19920707
- 主分类号： G03G15/20
- IPC分类号： G03G15/20
摘要：
Disclosed is an image heating device for a fixing device in image forming apparatus. The image heating device is provided with two heaters and an image fixing roller. The image fixing roller is heated by the two heaters, one having the heat distribution in the center and the other having the heat distribution in the end portion of the fixing roller. The heaters are alternately energized so that the power requirement is maintained limited. The energization time ratio of the heaters is suitably varied according to the sheet size in order to compensate the temperature loss in the end portions when the heating is conducted in the central portion only, or to reduce the temperature rise in the end portions, encountered when narrow sheets are consecutively passed, thereby preventing various drawbacks resulting from uneven temperature distribution on the fixing roller.
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