DEVELOPMENT ROLL FOR ELECTROPHOTOGRAPHY DEVICE

Provided is a development roll for electrophotography devices in which image defects are suppressed and which achieve both maintenance of high charging properties and discharging properties. The development roll is provided with a shaft member, an elastic substance layer formed on the outer circumfe...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser:	TAKEYAMA, Kadai, MINEMATSU, Kosuke, IMAI, Kentaro, KADOSHIMA, Yutaka, TATSUMI, Satoshi
Format:	Patent
Sprache:	eng
Schlagworte:	CINEMATOGRAPHY ELECTROGRAPHY ELECTROPHOTOGRAPHY HOLOGRAPHY MAGNETOGRAPHY PHOTOGRAPHY PHYSICS
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Beschreibung
Zusammenfassung:	Provided is a development roll for electrophotography devices in which image defects are suppressed and which achieve both maintenance of high charging properties and discharging properties. The development roll is provided with a shaft member, an elastic substance layer formed on the outer circumference of the shaft member, an intermediate layer formed on the outer circumference of the elastic substance layer, and a surface layer formed on the outer circumference of the intermediate layer. The volume resistivity of the surface layer 18 is within the range of 1.0×1014 to 1.0×1020 Ω·cm, and the volume resistivity of the intermediate layer 16 is within the range of 1.0×107 to 1.0×1013 Ω·cm.