CURL REDUCTION DEVICE AND IMAGE FORMING APPARATUS
PROBLEM TO BE SOLVED: To reduce the generation of curl in a sheet without increasing cost even when the temperature inside the device is increased.SOLUTION: A curl reduction device 7a comprises: a fixing film 22 that includes a heater 23; a pressure roller 24 that forms a fixing nip N with the fixin...
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Format: | Patent |
Sprache: | eng ; jpn |
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Zusammenfassung: | PROBLEM TO BE SOLVED: To reduce the generation of curl in a sheet without increasing cost even when the temperature inside the device is increased.SOLUTION: A curl reduction device 7a comprises: a fixing film 22 that includes a heater 23; a pressure roller 24 that forms a fixing nip N with the fixing film 22 to fix an image to a sheet P conveyed to the fixing nip N; and a curl reduction part 12 that, on the downstream side in a sheet conveyance direction of the fixing nip N, causes the heater 23 to supply, to the back face of the sheet P conveyed from the fixing nip N being on the pressure roller 24 side at the fixing nip N, a larger quantity of heat than that to the front face being on the fixing film 22 side.SELECTED DRAWING: Figure 3
【課題】装置内の温度が上昇した場合等であってもコストを上昇させることなくシートにおけるカールの発生を抑制すること。【解決手段】カール抑制装置7aは、ヒータ23を有する定着フィルム22と、定着フィルム22との間に定着ニップNを形成し、定着ニップNに搬送される用紙Pに画像を定着させる加圧ローラ24と、定着ニップNのシート搬送方向の下流側において、定着ニップNから搬送される用紙Pの定着ニップNにおける加圧ローラ24側となる裏面に定着フィルム22側となる表面より大きい熱量がヒータ23より供給されるようにするカール抑制部12と、を有する。【選択図】図3 |
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