DEVELOPING DEVICE AND IMAGE FORMING APPARATUS INCLUDING THE SAME

To provide a developing device of a non-magnetic one-component system that can satisfactorily maintain image quality even when the developing device uses a low temperature fixing toner, and an image forming apparatus including the same.SOLUTION: Melt viscosity (Pa s) at 95°C of a toner is set to be...

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Bibliographic Details
Main Authors WADA MINORU, OTA YUKARI, ISHINO MASATO
Format Patent
LanguageEnglish
Japanese
Published 25.02.2022
Subjects
CINEMATOGRAPHY
ELECTROGRAPHY
ELECTROPHOTOGRAPHY
HOLOGRAPHY
MAGNETOGRAPHY
PHOTOGRAPHY
PHYSICS
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Summary:To provide a developing device of a non-magnetic one-component system that can satisfactorily maintain image quality even when the developing device uses a low temperature fixing toner, and an image forming apparatus including the same.SOLUTION: Melt viscosity (Pa s) at 95°C of a toner is set to be included within a range of 10000 or more and 200000 or less. When an amount of toner conveyed on a developing roller 331 regulated by a regulation blade 334 is Md(g/m2), an amount of toner attached in a solid image on a photoreceptor drum 30 is Mp(g/m2), a peripheral speed of the developing roller 331 is Sd(mm/sec), and a peripheral speed of the photoreceptor drum 331 is Sp(mm/sec), relationships of 0.2≤Mp/Md≤0.8 and 0.8×Sd/Sp<Mp/Md are satisfied.SELECTED DRAWING: Figure 2 【課題】低温定着トナーを用いた場合であっても画像品質を良好に維持することが可能な非磁性一成分方式の現像装置およびこれを備えた画像形成装置を提供する。【解決手段】トナーの９５℃における溶融粘度（Ｐａ・ｓ）が１００００以上２０００００以下の範囲に含まれるように設定されている。規制ブレード３３４によって規制された現像ローラー３３１上のトナーの搬送量をＭｄ（ｇ／ｍ２）、感光体ドラム３０上のベタ画像におけるトナーの付着量をＭｐ（ｇ／ｍ２）、現像ローラー３３１の周速をＳｄ（ｍｍ／ｓｅｃ）、感光体ドラム３３１の周速をＳｐ（ｍｍ／ｓｅｃ）とすると、０．２≦Ｍｐ／Ｍｄ≦０．８、かつ、０．８×Ｓｄ／Ｓｐ＜Ｍｐ／Ｍｄの関係が満たされている。【選択図】図２
Bibliography:Application Number: JP20200136106