IMAGE FORMING APPARATUS

PROBLEM TO BE SOLVED: To provide an image forming apparatus configured to prevent unfixed toner from remaining on a recording material.SOLUTION: Heating control means 67 controls heating areas independently from image information for forming a toner image, to heat a fixing roller 62 at a fixing temp...

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Main Authors ISHII HIROKI, SUGANUMA TAKUYA, UCHITANI TAKESHI, TAKESHITA HIRONOBU, SUGIYAMA HIROYUKI, SUKESAKO MASAKI, YURA JUN
Format Patent
LanguageEnglish
Japanese
Published 08.12.2014
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Summary:PROBLEM TO BE SOLVED: To provide an image forming apparatus configured to prevent unfixed toner from remaining on a recording material.SOLUTION: Heating control means 67 controls heating areas independently from image information for forming a toner image, to heat a fixing roller 62 at a fixing temperature in each of the heating areas corresponding to an image area of an unfixed image and to heat the fixing roller 62 at a temperature lower than the fixing temperature in each of the heating areas corresponding to a non-image area of the unfixed image. A residual toner detection unit 46 detects whether residual toner t sticks to an intermediate transfer belt 41 after a toner image carried on the intermediate transfer belt 41 is transferred to a recording material P as the unfixed image. When the residual toner detection unit 46 detects the residual toner t sticking to the intermediate transfer belt 41, the heating control means 67 uses toner sticking information based on a result of the detection, as operation control information for controlling a state of a thermal heater group 63 heating the fixing roller 62. 【課題】未定着トナーが記録材に付着したまま残らないようにすることができる画像形成装置を提供する。【解決手段】加熱制御手段67は、トナー像を形成するための画像情報から各加熱領域を独立して制御することによって、未定着画像の画像領域に対応する各加熱領域で定着ローラ62を定着温度に加熱し、かつ、未定着画像の非画像領域に対応する各加熱領域で定着ローラ62の定着温度よりも低い温度に加熱し、中間転写ベルト41に担持したトナー像を記録材Pに未定着画像として転写した後の中間転写ベルト41に残トナーtが付着しているか否かを検知する残トナー検知部46を備え、加熱制御手段67は、残トナー検知部46で中間転写ベルト41に残トナーtが付着していることを検知した場合には、その検出結果に基づくトナー付着情報を、サーマルヒータ群63による定着ローラ62への加熱状態を制御する運転制御情報として用いる。【選択図】図3
Bibliography:Application Number: JP20130107125