Abstract: An image carrier according to one or more embodiments may include: a cylindrical image carrier member including an outer circumferential surface formed with an image carrier layer configured to carry a developer image; one or more silencers disposed in the image carrier member; and a bonding member that bonds the one or more the silencers to an inner circumferential surface of the image carrier member. For each silencer, the inner circumferential surface of the image carrier member includes one or more bonding areas to which the bonding member is attached. A bonding range, in which the one or more bonding areas are fit, for each silencer, has a length thereof in an axial direction of the silencer being greater than a length thereof in a circumferential direction of the silencer.

Abstract: An image carrier according to one or more embodiments may include: a cylindrical image carrier member including an outer circumferential surface formed with an image carrier layer configured to carry a developer image; one or more silencers disposed in the image carrier member; and a bonding member that bonds the one or more the silencers to an inner circumferential surface of the image carrier member. For each silencer, the inner circumferential surface of the image carrier member includes one or more bonding areas to which the bonding member is attached. A bonding range, in which the one or more bonding areas are fit, for each silencer, has a length thereof in an axial direction of the silencer being greater than a length thereof in a circumferential direction of the silencer.

Abstract: A charging device includes a charging member that charges a surface of an image bearing body. The charging member includes a rotation shaft applied with a voltage, and a resilient conductive layer provided on an outer circumferential surface of the rotation shaft. The resilient conductive layer charges the surface of the image bearing body. The resilient conductive layer has a plurality of high resistance regions arranged at intervals in an axial direction of the rotation shaft.

Abstract: An image formation unit includes a rotatable image carrier, a charge member configured to electrically charge a surface of the image carrier, a charge cleaning member including cell marks in a surface layer thereof and configured to clean a surface of the charge member, a first cleaning member configured to clean the surface of the image carrier, and a second cleaning member including cell marks in a surface layer thereof and provided downstream of the first cleaning member in a rotation direction of the image carrier. The cell density of the charge cleaning member is equal to or more than the cell density of the second cleaning member.

Abstract: A charging device includes a charging member that charges a surface of an image bearing body. The charging member includes a rotation shaft applied with a voltage, and a resilient conductive layer provided on an outer circumferential surface of the rotation shaft. The resilient conductive layer charges the surface of the image bearing body. The resilient conductive layer has a plurality of high resistance regions arranged at intervals in an axial direction of the rotation shaft.

Abstract: A charge member is positioned in contact with an image carrier and charges a surface of the image carrier. The charge member includes a support body, an elastic layer having conductivity, which is formed on the support body; and a first surface treatment layer, which contains isocyanate compound and polycarbonate compound, is formed on the elastic layer. Residual potential of the charge member in 0.1 [seconds] after corona discharge at a voltage of 6.0 [kV] is 12.16 [V] or less.

Abstract: An image formation unit includes a rotatable image carrier, a charge member configured to electrically charge a surface of the image carrier, a charge cleaning member including cell marks in a surface layer thereof and configured to clean a surface of the charge member, a first cleaning member configured to clean the surface of the image carrier, and a second cleaning member including cell marks in a surface layer thereof and provided downstream of the first cleaning member in a rotation direction of the image carrier. The cell density of the charge cleaning member is equal to or more than the cell density of the second cleaning member.

Abstract: A charging device for charging an image supporting member includes a charging roller for charging the image supporting member; and a cleaning member for cleaning the surface of the charging roller. The charging roller has a surface, and the surface has irregularity oriented in a direction opposite to a direction that the cleaning member slides against the charging roller. Further, the surface has a maximum peak height Rp within a range of 2 ?m?Rp?10 ?m, and an average profile length RSm within a range of 40 ?m?RSm?200 ?m.

Abstract: An image forming apparatus has: a photosensitive drum as an image holding body to form an electrostatic image; a charging roller which is arranged so as to face the drum and charges it; pressing springs which apply a pressing force to the charging roller toward the drum; and spacer members as gap holding members which are attached to both sides of the charging roller, are come into contact with the drum surface, and hold a gap between the drum and the charging roller. The pressing force of the springs and a frictional coefficient between the drum and the spacer members are set in order to driven-rotate the charging roller to the drum at the same peripheral velocity by a frictional force occurring between the drum and the spacer members. The apparatus uses a contactless charging system for realizing high charging performance, high picture quality, and high durability.

Abstract: A charging device for charging an image supporting member includes a charging roller for charging the image supporting member; and a cleaning member for cleaning the surface of the charging roller. The charging roller has a surface, and the surface has irregularity oriented in a direction opposite to a direction that the cleaning member slides against the charging roller. Further, the surface has a maximum peak height Rp within a range of 2 ?m?Rp?10 ?m, and an average profile length RSm within a range of 40 ?m?RSm?200 ?m.

Abstract: An image forming apparatus has: a photosensitive drum as an image holding body to form an electrostatic image; a charging roller which is arranged so as to face the drum and charges it; pressing springs which apply a pressing force to the charging roller toward the drum; and spacer members as gap holding members which are attached to both sides of the charging roller, are come into contact with the drum surface, and hold a gap between the drum and the charging roller. The pressing force of the springs and a frictional coefficient between the drum and the spacer members are set in order to driven-rotate the charging roller to the drum at the same peripheral velocity by a frictional force occurring between the drum and the spacer members. The apparatus uses a contactless charging system for realizing high charging performance, high picture quality, and high durability.