Invention Grant
- Patent Title: Developing roller
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Application No.: US17024696Application Date: 2020-09-18
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Publication No.: US11269265B2Publication Date: 2022-03-08
- Inventor: Yusuke Fujisawa , Sotaro Yamashita
- Applicant: BRIDGESTONE CORPORATION
- Applicant Address: JP Tokyo
- Assignee: BRIDGESTONE CORPORATION
- Current Assignee: BRIDGESTONE CORPORATION
- Current Assignee Address: JP Tokyo
- Agency: Kenja IP Law PC
- Priority: JPJP2019-172233 20190920
- Main IPC: G03G15/08
- IPC: G03G15/08

Abstract:
Provided are a developing roller which includes a shaft, and a base layer and a surface layer sequentially formed on an outer peripheral portion of the shaft in a radial direction, where 1) a low-resilience layer is disposed between the base layer and the surface layer, 2) the low-resilience layer has a loss tangent tan δ value that is larger than a loss tangent tan δ value of any of the base layer and the surface layer when measured under conditions of a temperature of 23° C., an amplitude of ±20 μm, and a frequency of 6 Hz, and 3) the developing roller has an Asker C hardness and thickness value of 500 or less, which is defined by the following formula (1): Asker C hardness and thickness value of the developing roller=Asker C hardness of the developing roller×(thickness of the developing roller+6) (1).
Public/Granted literature
- US20210088930A1 DEVELOPING ROLLER Public/Granted day:2021-03-25
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