Invention Grant
- Patent Title: Development roll for electrophotography device
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Application No.: US16568293Application Date: 2019-09-12
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Publication No.: US10656555B2Publication Date: 2020-05-19
- Inventor: Kentaro Imai , Kadai Takeyama , Yutaka Kadoshima , Kosuke Minematsu , Satoshi Tatsumi
- Applicant: Sumitomo Riko Company Limited
- Applicant Address: JP Aichi
- Assignee: Sumitomo Riko Company Limited
- Current Assignee: Sumitomo Riko Company Limited
- Current Assignee Address: JP Aichi
- Agency: JCIPRNET
- Priority: com.zzzhc.datahub.patent.etl.us.BibliographicData$PriorityClaim@2a8ab622
- Main IPC: G03G15/08
- IPC: G03G15/08

Abstract:
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.
Public/Granted literature
- US20200012210A1 DEVELOPMENT ROLL FOR ELECTROPHOTOGRAPHY DEVICE Public/Granted day:2020-01-09
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