US 12,222,661 B2
Developing apparatus having regulating blade with specific surface properties, process cartridge and image forming apparatus
Yosuke Kishi, Shizuoka (JP); Kazuaki Iwata, Shizuoka (JP); Minoru Ito, Shizuoka (JP); Masaru Kobayashi, Kanagawa (JP); Junji Seki, Kanagawa (JP); and Hiroaki Onuma, Kanagawa (JP)
Assigned to Canon Kabushiki Kaisha, Tokyo (JP)
Filed by CANON KABUSHIKI KAISHA, Tokyo (JP)
Filed on Dec. 8, 2023, as Appl. No. 18/533,374.
Claims priority of application No. 2022-200126 (JP), filed on Dec. 15, 2022.
Prior Publication US 2024/0201615 A1, Jun. 20, 2024
Int. Cl. G03G 15/08 (2006.01); G03G 21/18 (2006.01)
CPC G03G 15/0812 (2013.01) [G03G 21/1814 (2013.01); G03G 2215/0866 (2013.01)] 7 Claims
OG exemplary drawing
 
1. A developing apparatus comprising:
a developer bearing member configured to bear a developer; and
a regulating member configured to come in contact with the developer bearing member, and regulate a thickness of a layer of the developer borne on the developer bearing member, wherein
3≤Rz<20(μm),
30≤Sm≤100(μm), and
Vmp≥0.05 ml/m2 are satisfied
where Rz represents a maximum height roughness, and Sm represents an average interval of unevenness in a portion of a surface of the regulating member that comes in contact with the developer bearing member, and Vmp represents a volume in an initial state of a protruding peak part in a three-dimensional surface roughness defined in ISO 25178.