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

Claim 7:
8. An inspection method for a conductive roller, the inspection method comprising:
a first process, and
a second process,
wherein:
the inspection method is an inspection method for determining whether characteristics of the conductive roller are good,
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,
an average thickness of the surface layer is in a range of 0.2 micrometers or greater and 5.5 micrometers or less,
the first process includes calculating a number of particles of the surface roughness imparting material per unit area of the surface layer; and
the second process includes determining, based on the number of particles being in a range of 3.5×105 particles per mm2 or greater and 7.5×105 particles per mm2 or less, that the characteristics of the conductive roller are good.