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US 2020/0301306 A1Published application
Charging member, charging device, process cartridge, and image forming apparatus
AssigneeFuji Xerox Co., Ltd.
InventorsYasuhiko KINUTA, Shogo TOMARI, Hiroko KOBAYASHI, Kosuke NARITA
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Abstract
A charging member includes a conductive substrate, an elastic layer disposed on the conductive substrate, and a surface layer disposed on the elastic layer. Regarding the surface of the surface layer, in the axial direction, the ratio of the mean spacing of profile irregularities Sm to the ten-point mean roughness Rz and the reduced peak height Spk respectively satisfy 15≤Sm/Rz≤35 and Spk≤5 μm.
Claims14
A charging member comprising:
- a conductive substrate;
- an elastic layer disposed on the conductive substrate;
- and
- a surface layer disposed on the elastic layer,
- wherein, regarding a surface of the surface layer, in an axial direction, a ratio of a mean spacing of profile irregularities Sm to a ten-point mean roughness Rz and a reduced peak height Spk respectively satisfy 15≤Sm/Rz≤35 and Spk≤5 μm.
- wherein, the reduced peak height Spk satisfies Spk≤3.5 μm.
3 more elements
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A charging member comprising:
- a conductive substrate;
- an elastic layer disposed on the conductive substrate;
- and
- a surface layer disposed on the elastic layer,
- wherein, regarding a surface of the surface layer, in an axial direction, a ratio of a mean spacing of profile irregularities Sm to a ten-point mean roughness Rz and a reduced peak height Spk respectively satisfy 15≤Sm/Rz≤35 and Spk≤5 μm,
- when a ratio of a mean spacing of profile irregularities Sm to a ten-point mean roughness Rz (Sm/Rz) in a circumferential direction is denoted as A and the ratio of the Sm to the Rz (Sm/Rz) in the axial direction is denoted as B, a ratio of the A to the B satisfies 0.8≤A/B≤1.2.
3 more elements
A charging member comprising:
- a conductive substrate;
- an elastic layer disposed on the conductive substrate;
- and
- a surface layer disposed on the elastic layer,
- wherein, regarding a surface of the surface layer, in an axial direction, a ratio of a mean spacing of profile irregularities Sm to a ten-point mean roughness Rz and a reduced peak height Spk respectively satisfy 15≤Sm/Rz≤35 and Spk≤5 μm,
- wherein a ten-point mean roughness Rz2 of a surface of the elastic layer that is near the surface layer in the axial direction satisfies 3≤Rz2≤10.
3 more elements
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Dependencies are inferred from the claim text.