Patent ID: 11947273
Assignee: NOK CORPORATION
Field: Optics (Instruments)
Classification: CPC G  F | IPC F  G

Claim 5:
6. An image forming apparatus comprising:
a conductive roller; and
a photoreceptor in contact with or close to the conductive roller,
wherein:
the conductive roller includes:
a core member including an outer surface along and about an axial line thereof; and
a surface layer arranged along the outer surface of the core member,

the surface layer includes a conductive portion, and a surface roughness imparting material in a form of particles dispersed in the conductive portion,
an average particle size of the surface roughness imparting material is in a range of 6 micrometers or greater and less than 10 micrometers,
a number of particles of the surface roughness imparting material per unit area of the surface layer is in a range of 3.5×105 particles per mm2 or greater and 7.5×105 particles per mm2 or less, and
an average thickness of the surface layer is in a range of 0.2 micrometers or greater and 5.5 micrometers or less.