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AssigneeRicoh Company, Ltd.
InventorsAkio Kosuge, Hiroshi Ono
Estimating the term…
An image forming apparatus has a latent image supporting body configured by a substrate and a covering layer provided on the substrate; and a charging device which is a rotating body configured by an axis member and a charging member provided on the axis member, and which charges the latent image supporting body facing the charging member. In this image forming apparatus, a value, which is obtained by dividing a capacitance [pF] between the axis member in the rotating body and the substrate in the latent image supporting body by the length [mm] in the direction perpendicular to the direction of the surface migration of the charging member, is set to be at least 0.35 [pF/mm], the capacitance being obtained when, instead of the latent image supporting body, the substrate in the latent image supporting body is caused to face the charging member.
An image forming apparatus, comprising:
A rotating member production method for producing a rotating member in a charging device which has the rotating member in which abutting members abutting onto a latent image supporting body and a discharging member facing the latent image supporting body with a predetermined gap and for discharging toward the latent image supporting body are fixed to a rotatable axis member throughout the entire circumference in the direction of rotation of the axis member, and which causes the latent image supporting body to be charged by discharge from the discharging member, while keeping the gap between the latent image supporting body and the discharging member by means of the latent image supporting body and abutting members abutting onto each other, the method comprising the steps of:
A process unit in which at least a latent image supporting body and a charging device of an image forming apparatus are detachably supported by the image forming apparatus main body as one unit, wherein the latent image supporting body comprises a substrate and a covering layer provided on the substrate, the charging device is a rotating body comprising an axis member and a charging member provided on the axis member, and charges the latent image supporting body facing the charging member, and furthermore a value, which is obtained by dividing a capacitance [pF] between the axis member in the rotating body and the substrate in the latent image supporting body by the length [mm] in the direction perpendicular to the direction of the surface migration of the charging member, is at least 0.35 [pF/mm], the capacitance being obtained when, instead of the latent image supporting body, the substrate in the latent image supporting body is caused to face the charging member.
A charging device which is a rotating body comprising abutting members abutting onto a charged body, an axis member, and a charging member provided on the axis member, and which forms a space between the charged body and the charging member by causing the abutting members to abut onto the charged member, to charge the charged body, wherein the abutting members having a degree of hardness (JIS D) of at least 44 degrees are used, the charging member having a degree of hardness (JIS D) of at least 44 degrees is used, and the space under an environment where ambient temperature is between 10 and 32 [° C.] is set between 15 through 75 [μm].
A rotating member production method for producing a rotating member in a charging device which has the rotating member in which abutting members abutting onto a charged body and a discharging member facing the charged body via a space and for discharging toward the charged body are fixed to a rotatable axis member throughout the entire circumference in the direction of rotation of the axis member, and which causes the charged body to be charged by discharge from the discharging member, while keeping the space between the charged body and the discharging member by means of the charged body and abutting members abutting onto each other, the method comprising the steps of:
A process unit having a charging device, wherein the charging device is a rotating body comprising abutting members abutting onto a charged body, an axis member, and a charging member provided on the axis member, and forms a space between the charged body and the charging member by causing the abutting members to abut onto the charged member, to charge the charged body, and wherein the abutting members having a degree of hardness (JIS D) of at least 44 degrees are used, the charging member having a degree of hardness (JIS D) of at least 44 degrees is used, and the space under an environment where ambient temperature is between 10 and 32 [° C.] is set between 15 through 75 [μm].
An image forming apparatus having a charged body charged by a charging device, wherein the charging device is a rotating body comprising abutting members abutting onto a charged body, an axis member, and a charging member provided on the axis member, and forms a space between the charged body and the charging member by causing the abutting members to abut onto the charged member, to charge the charged body, and wherein the abutting members having a degree of hardness (JIS D) of at least 44 degrees are used, the charging member having a degree of hardness (JIS D) of at least 44 degrees is used, and the space under an environment where ambient temperature is between 10 and 32 [° C.] is set between 15 through 75 [μm].
A charging device which is a rotating body comprising abutting members abutting onto a charged body, an axis member, and a charging member provided on the axis member, and which forms a space between the charged body and the charging member by causing the abutting members to abut onto the charged member, to charge the charged body, wherein the abutting members having a degree of hardness (JIS D) of at least 44 degrees are used, the charging member having a degree of hardness (JIS D) of at least 44 degrees is used, and a fluctuation width of the space per rotation of the rotating body is 40 [μm] or less under an environment where ambient temperature is between 10 and 32 [° C.].
A process unit having a charging device, wherein the charging device is a rotating body comprising abutting members abutting onto a charged body, an axis member, and a charging member provided on the axis member, and forms a space between the charged body and the charging member by causing the abutting members to abut onto the charged member, to charge the charged body, and wherein the abutting members having a degree of hardness (JIS D) of at least 44 degrees are used, the charging member having a degree of hardness (JIS D) of at least 44 degrees is used, and a fluctuation width of the space per rotation of the rotating body is 40 [μm] or less under an environment where ambient temperature is between 10 and 32 [° C.].
An image forming apparatus having a charged body charged by a charging device, wherein the charging device is a rotating body comprising abutting members abutting onto a charged body, an axis member, and a charging member provided on the axis member, and forms a space between the charged body and the charging member by causing the abutting members to abut onto the charged member, to charge the charged body, and wherein the abutting members having a degree of hardness (JIS D) of at least 44 degrees are used, the charging member having a degree of hardness (JIS D) of at least 44 degrees is used, and a fluctuation width of the space per rotation of the rotating body is 40 [μm] or less under an environment where ambient temperature is between 10 and 32 [° C.].
Dependencies are inferred from the claim text.