Electro-conductive roll and image-forming apparatus using the same
First Claim
1. An electro-conductive roll that makes contact with a body to be charged in a state in which a voltage is applied to the roll, and charges the body to be charged, wherein a surface of the electro-conductive roll satisfies the following conditions (a) and (b):
- (a) the surface of the electro-conductive roll has a 10-point average roughness of 5 μ
m or less; and
(b) the surface of the electro-conductive roll has a dynamic ultra-microhardness in the range of 0.04 to 0.5.
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Accused Products
Abstract
An electro-conductive roll is provided that makes contact with a body to be charged in a state in which a voltage is applied thereto, and charges the body to be charged, a surface of the electro-conductive roll satisfying the following conditions (a) and (b):
(a) the surface of the electro-conductive roll has a 10-point average roughness of 5 μm or less; and
(b) the surface of the electro-conductive roll has a dynamic ultra-microhardness in the range of 0.04 to 0.5.
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Citations
20 Claims
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1. An electro-conductive roll that makes contact with a body to be charged in a state in which a voltage is applied to the roll, and charges the body to be charged, wherein a surface of the electro-conductive roll satisfies the following conditions (a) and (b):
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(a) the surface of the electro-conductive roll has a 10-point average roughness of 5 μ
m or less; and
(b) the surface of the electro-conductive roll has a dynamic ultra-microhardness in the range of 0.04 to 0.5. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19)
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20. An image-forming apparatus comprising:
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a photoreceptor;
a charging device that charges the photoreceptor;
an exposure device that exposes the charged photoreceptor and forms an electrostatic latent image;
a developing device that develops the electrostatic latent image with a toner; and
a transfer device that transfers a toner image to a receiving medium, wherein the charging device, in a state where voltage is applied thereto, comes in contact with the photoreceptor, and comprises an electro-conductive roll that charges the photoreceptor, wherein a surface of the electro-conductive roll satisfies the following conditions (a) and (b);
(a) the surface of the electro-conductive roll has a 10-point average roughness (Rz) of 5 μ
m or less; and
(b) the surface of the electro-conductive roll has a dynamic ultra-microhardness in the range of 0.04 to 0.5.
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Specification