FIXING DEVICE AND IMAGE FORMATION DEVICE

PROBLEM TO BE SOLVED: To facilitate obtaining of an image of gloss targeted for an object in comparison with a case where means for adjusting a temperature of a recording material is not provided on an upstream side or downstream side of a pressing part.SOLUTION: A fixing unit 60 comprises: a fixing...

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Bibliographic Details
Main Authors MURASE HISASHI, TAKAHASHI MASAKAZU
Format Patent
LanguageEnglish
Japanese
Published 06.10.2016
Subjects
CINEMATOGRAPHY
ELECTROGRAPHY
ELECTROPHOTOGRAPHY
HOLOGRAPHY
MAGNETOGRAPHY
PHOTOGRAPHY
PHYSICS
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Summary:PROBLEM TO BE SOLVED: To facilitate obtaining of an image of gloss targeted for an object in comparison with a case where means for adjusting a temperature of a recording material is not provided on an upstream side or downstream side of a pressing part.SOLUTION: A fixing unit 60 comprises: a fixing belt 610 that is heated by an internal heating roll 612, and an external heating roll 613 to fix a toner image on a paper P; a pressing roll 62 that forms a nip part N for the paper P retaining the non-fixed toner image to pass through between the fixing belt 610 and the pressing roll; and an upstream side heating unit 81 that is provided upstream of the nip part N, and when a basis weight of the paper P is larger than a predetermined basis weight, heats the paper P to be conveyed toward the nip part N.SELECTED DRAWING: Figure 2 【課題】加圧部の上流側または下流側で記録材の温度を調整する手段を有さない場合と比較して、目標とするグロスの画像を得やすくする。【解決手段】定着ユニット６０は、内部加熱ロール６１２、外部加熱ロール６１３により加熱され、用紙Ｐにトナー像を定着する定着ベルト６１０と、定着ベルト６１０との間に未定着トナー像を保持した用紙Ｐが通過するためのニップ部Ｎを形成する加圧ロール６２と、ニップ部Ｎより上流側に設けられ、用紙Ｐの坪量が予め定められた坪量より大きい場合に、ニップ部Ｎに向けて搬送される用紙Ｐを加熱する上流側加熱ユニット８１とを備える。【選択図】図２
Bibliography:Application Number: JP20150058749