Back to results
US 6,212,346 B1Granted
Charging member for holding electrically conductive particles in cells
AssigneeCanon Kabushiki Kaisha
InventorsJun Hirabayashi, Harumi Ishiyama, Yasunori Chigono
Life of this patent
Estimating the term…
Abstract
The present invention relates to a charging apparatus in which, when a is a volume resistance value (Ωcm) of an electrically conductive particles, b is a volume resistivity value (Ωcm) of a foam body layer, c is a thickness (cm) of the foam body layer and d is a diameter (cm) of a cell, the following relationship is satisfied: a≦bc/10d.
Claims8
A charging apparatus comprising:
- a body to be charged;
- and
- charging 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, and
- wherein, when a is a volume resistivity value (Ωcm) of the electrically conductive particles, b is a volume resistivity value (Ωcm) 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≦bc/10d.
3 more elements
A charging member for holding electrically conductive particles, comprising:
- an electrically conductive core material;
- a foam body surface layer having cells holding the electrically conductive particles;
- and
- an electrically conductive particle layer covering a surface of the foam body,
- wherein, when a is a volume resistivity value (Ω·cm) of the electrically conductive particles, b is a volume resistivity value (Ω·cm) of the foam body surface layer, c is a thickness (cm) of the foam body surface layer and d is a diameter (cm) of the cell, a relationship bc/10d≧a is satisfied.
2 more elements
Dependencies are inferred from the claim text.