THERMAL FIXATION DEVICE

• Main Author: ONISHI TAKAHIRO
• Format: Patent
• Language: English; Japanese
• Published: 15.02.2018
• Subjects: CINEMATOGRAPHY; ELECTROGRAPHY; ELECTROPHOTOGRAPHY; HOLOGRAPHY; MAGNETOGRAPHY; PHOTOGRAPHY; PHYSICS

PROBLEM TO BE SOLVED: To prevent a film from slipping due to a temperature drop.SOLUTION: Provided is a fixation device comprising: a thermal rotor for heating a recording material on which an unfixed toner image is formed; a pressure rotor for forming a nip part between the thermal rotor and itself and applying pressure so that the recording material is brought under pressure into contact with the thermal rotor in the nip part; and temperature state detection means for detecting the temperature state of the thermal rotor. At termination of heating of the recording material by the thermal rotor, rotation of the thermal rotor is executed with a first conveyance speed for the purpose of cooling and then, when a prescribed temperature state is detected by the temperature state detection means, rotation of the thermal rotor is executed with a second conveyance speed slower than the first conveyance speed.SELECTED DRAWING: Figure 12 【課題】温度低下によるフィルムスリップを防止可能とすること。【解決手段】未定着のトナー画像が形成された記録材を加熱するための加熱回転体と、前記加熱回転体との間でニップ部を形成し、前記ニップ部において前記記録材を前記加熱回転体に圧接させるように圧力を加える加圧回転体と、前記加熱回転体の温度状態を検知するための温度状態検知手段とを具備し、前記加熱回転体による前記記録材の加熱終了の際に、冷却のために前記加熱回転体の回転を第１の搬送速度により実行し、その後、前記温度状態検知手段が所定の温度状態を検知した場合に、前記加熱回転体の回転を前記第１の搬送速度よりも遅い第２の搬送速度で実行することを特徴とする定着装置。【選択図】図１２