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US 10,852,662 B2Granted
Developing device, process cartridge and image forming apparatus
AssigneeCanon Kabushiki Kaisha
InventorsTakuya Oka, Yoshihiro Mitsui, Akinobu Saito, Shinichi Agata, Kentaro Yamawaki
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Abstract
A developing device includes a developer carrying member, a developing frame, and a regulating member. The regulating member includes a curved surface portion contactable to a surface of the developer carrying member, and satisfies the following relationships: 200 MPa≤HM≤1100 MPa, and 0.08 mm≤Rb≤0.3 mm, where HM is a Martens hardness of toner contained in the developer under a maximum load of 2.0×10−4 N, and Rb is a radius of curvature of the curved surface portion.
Claims15
A developing device including a developer, the developing device comprising:
- a developer carrying member configured to carry the developer;
- a developing frame configured to rotatably support said developer carrying member;
- and
- a regulating member provided in said developing frame and configured to regulate a thickness of the developer carried on said developer carrying member by contact thereof with a surface of said developer carrying member,
- wherein said regulating member includes a curved surface portion contactable to the surface of said developer carrying member, and
- wherein the following relationships are satisfied:
- 200 MPa≤HM≤1100 MPa, and
- 0.08 mm≤Rb 0.3 mm,
- where HM is a Martens hardness of toner contained in the developer under a maximum load of 2.0×10−4 N, and Rb is a radius of curvature of said curved surface portion.
6 more elements
Dependencies are inferred from the claim text.