Patent ID: 6212346
Filing Date: 2001-04-03
Classification: G03G

Abstract:
A charging apparatus comprising:a body to be charged; andcharging means for charging said body to be charged, said charging means including a charging member which has a foam body surface layer which closely contacts said body to be charged and an electrically conductive particle layer covering a surface of said charging member;wherein said charging means injects an electric charge to said body to be charred via the electrically conductive particle, andwherein, when a is a volume resistivity value (.OMEGA.cm) of the electrically conductive particles, b is a volume resistivity value (.OMEGA.cm) of the foam body surface layer, c is a thickness (cm) of the foam body layer and d is a diameter (cm) of the cell, the following relationship is satisfied:a.ltoreq.bc/10d.