FIXING APPARATUS AND IMAGE FORMING APPARATUS

• Main Authors: MICHIDA KAZUHIRO, YOSHIDA TSUGUHIRO, SATO YUTAKA, WAKATSU KOHEI
• Format: Patent
• Language: English; Japanese
• Published: 24.09.2020
• Subjects: CINEMATOGRAPHY; ELECTRIC HEATING; ELECTRIC LIGHTING NOT OTHERWISE PROVIDED FOR; ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR; ELECTRICITY; ELECTROGRAPHY; ELECTROPHOTOGRAPHY; HOLOGRAPHY; MAGNETOGRAPHY; PHOTOGRAPHY; PHYSICS

To suppress the reduction of productivity when switching an electric power supply path to a heating element.SOLUTION: A fixing apparatus comprises: a heater 54 including at least heating elements 54b1 and 54b2; a film 51 heated by the heater 54; a pressure roller 53 forming a fixation nip part N with the film 51; a heating element switching device 57 for switching an electric power supply path for supplying electric power to the heating element 54b1 or the heating element 54b2; and a CPU 94 for controlling the heating element switching device 57. The CPU 94 starts an operation for switching the electric power supply path by the heating element switching device 57 so as to supply the electric power to the heating element 54b2 while clamping a small size paper sheet in the fixation nip part N when continuously printing the small size paper sheet.SELECTED DRAWING: Figure 6 【課題】発熱体への電力供給経路の切り替え動作時の生産性の低下を抑制すること。【解決手段】発熱体５４ｂ１と発熱体５４ｂ２と、を少なくとも有するヒータ５４と、ヒータ５４により加熱されるフィルム５１と、フィルム５１とともに定着ニップ部Ｎを形成する加圧ローラ５３と、発熱体５４ｂ１又は発熱体５４ｂ２に電力を供給するための電力供給経路を切り替える発熱体切り替え器５７と、発熱体切り替え器５７を制御するＣＰＵ９４と、を備え、ＣＰＵ９４は、小サイズ紙に連続して印刷を行う場合に、小サイズ紙が定着ニップ部Ｎにおいて挟持されている間に、発熱体５４ｂ２に電力が供給されるように発熱体切り替え器５７による電力供給経路の切り替え動作を開始する。【選択図】図６