IMAGE FORMING APPARATUS AND PROCESS CARTRIDGE

IMAGE FORMING APPARATUS AND PROCESS CARTRIDGE

An image forming apparatus includes an image bearing member, a charging roller, a cleaning roller and a developing member. The charging roller is provided with a surface contacting a surface of the image bearing member and charges the surface of the image bearing member. The cleaning roller is provi...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser: FUJINO, HIROKAZU, ITO, MOTONARI, KURACHI, MASAHIRO, FUKUSHIMA, NAOKI
Format: Patent
Sprache:eng
Schlagworte:
CINEMATOGRAPHY
ELECTROGRAPHY
ELECTROPHOTOGRAPHY
HOLOGRAPHY
MAGNETOGRAPHY
PHOTOGRAPHY
PHYSICS
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Beschreibung
Zusammenfassung:An image forming apparatus includes an image bearing member, a charging roller, a cleaning roller and a developing member. The charging roller is provided with a surface contacting a surface of the image bearing member and charges the surface of the image bearing member. The cleaning roller is provided with an elastic foam layer contacting the surface of the charging roller cleans the surface of the charging roller. A storage elastic modulus of the surface of the charging roller measured in a measuring environment of 23° C., 50% RH and a measuring frequency of 10 Hz is defined as E′C and a storage elastic modulus of the elastic foam layer of the cleaning roller is defined as E′CC. The storage elastic modulus E′C of the surface of the charging roller and the storage elastic modulus E′CC of the elastic foam layer of the cleaning roller satisfy E′C>E′CC.