US 2026/0177949 A1 · ELECTROPHOTOGRAPHIC MEMBER AND ELECTROPHOTOGRAPHIC IMAGE FORMING APPARATUS

Abstract

An electrophotographic member having, on an outer surface thereof, a plurality of dimples, wherein regarding each shape of the plurality of dimples, in each of the dimples, when a maximum width of the dimple is denoted as WL (μm), a minimum width of the dimple is denoted as WS (μm), a maximum depth of the dimple is denoted as DM (μm), and in the plurality of dimples, when an arithmetic mean value of WS/WL is denoted as (WS/WL) Ave, an arithmetic mean value of WL is denoted as WLAve (μm), and an arithmetic mean value of DM is denoted as DMAve (μm), then (WS/WL) Ave, WLAve, and DMAve satisfy specific expressions (1) to (4), and a percentage of an area occupied by the dimples on the outer surface is 20.0 to 50.0 area %.

Claims6

Dependent claims

An electrophotographic member having, on an outer surface thereof, a plurality of dimples, wherein

regarding each shape of the plurality of dimples, in each of the dimples, when a maximum width of the dimple is denoted as WL (μm), a minimum width of the dimple is denoted as WS (μm), a maximum depth of the dimple is denoted as DM (μm), and in the plurality of dimples, when an arithmetic mean value of WS/WL is denoted as (WS/WL) Ave, an arithmetic mean value of WL is denoted as WLAve (μm), and an arithmetic mean value of DM is denoted as DMAve (μm), then (WS/WL) Ave, WLAve, and DMAve satisfy expressions (1) to (4) below:
(
WS
/
WL
)
⁢
Ave
≥
0.6
(
1
)
0.5
μm
≤
WLAve
≤
4.
μm
(
2
)
0.
<
(
DMAve
/
WLAve
)
≤
0.3
(
3
)
DMAve
≥
0.1
μm
,
(
4
)
and
a percentage of an area occupied by the dimples on the outer surface is 20.0 to 50.0 area %.

42 more elements

Dependencies are inferred from the claim text.

Electrophotographic member and electrophotographic image forming apparatus

Life of this patent

Electrophotographic member and electrophotographic image forming apparatus

Life of this patent

Abstract

Claims6