Development Roller, Development Device, Image Forming Apparatus, and Method of Manufacturing Development Roller
AssigneeSeiko Epson Corporation
InventorsYoichi YAMADA, Masahiro MAEDA, Junichi SUZUKI, Takatomo FUKUMOTO
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Abstract
A development roller includes a base unit having a base recess and a base projection that are formed in a predetermined area of a circumference surface of the base unit, and a surface layer formed on the circumference surface of the base unit and having on the circumference thereof a recess and a projection formed respectively in accordance with the base recess and the base projection of the base unit. Surface hardness of the projection is higher than surface hardness of the recess.
Claims20
A development roller, comprising a base unit having a base recess and a base projection that are formed in a predetermined area of a circumference surface of the base unit, and a surface layer formed on the circumference surface of the base unit and having on the circumference thereof a recess and a projection formed respectively in accordance with the base recess and the base projection of the base unit,
- wherein surface hardness of the projection is higher than surface hardness of the recess.
A method of manufacturing a development roller, comprising forming a base recess and a base projection on at least an entire image forming area of a base unit, covering at least the entire image forming area with an amorphous metal subsequent to the formation of the base recess and base projection, and crystallizing the amorphous metal covering the base projection.
A method of manufacturing a development roller, comprising forming a base recess and a base projection on at least an entire image forming area of a base unit, and covering at least the entire image forming area with at least one layer of a amorphous metal subsequent to the formation of the base recess and base projection.
Dependencies are inferred from the claim text.