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US 8,007,426 B2Granted
Developing roller
AssigneeKonica Minolta Business Technologies, Inc.
InventorsMeizo Shirose, Satoshi Uchino
Life of this patent
Estimating the term…
Abstract
A developing roller that can form a toner image with high quality includes: a supporting shaft, and at least one resin layer formed on a peripheral face of the supporting shaft, the resin layer containing carbon black in which a number average Feret's diameter is in a range from 5 to 300 nm and primary particles account for 5% or more on a number basis, and the carbon black being dispersed in a base resin material thereof.
Claims7
A developing roller comprising:
- a supporting shaft, and
- at least one resin layer formed on a peripheral face of the supporting shaft,
- the resin layer containing carbon black in which a number average Feret's diameter is in a range from 5 to 300 nm and primary particles account for 5% or more on a number basis, and the carbon black being dispersed in a base resin material thereof;
- and
- wherein a surface of the carbon black particle is surface-treated with a phenol-based organic compound having a molecular weight of 50 or more to 1500 or less.
2 more elements
Dependencies are inferred from the claim text.