| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an image forming apparatus, in which a photosensitive drum exhibiting high hardness and high elasticity is used in a C-roller charging system and stable transfer, with little stains can be performed over a prolonged period of time. <P>SOLUTION: In the image forming apparatus comprising an image carrier, a charging device, an electrostatic latent image forming means, a development means and a transfer means, a photoreceptor which is the image carrier has a photosensitive layer and a protective layer on a conductive support, where the protective layer has HU (universal hardness) of 150-220 N/mm<SP>2</SP>and the modulus We of elastic deformation of 45-65%, when indented under a maximum load of 6 mN in a hardness test using a Vickers quadrangular-pyramidal diamond indentor in an environment at 25°C and 50% humidity; and when the surface roughness Rzjis of a surface of the protective layer of the photoreceptor is represented by D1 (μm), the surface roughness Rzjis of the transfer device by D3 (μm), the Asker C hardness of the transfer device by C(°), and the weight average particle diameter of the toner by D2 (μm), the expression: D1×We/10<D2<D3×C/100 is satisfied. <P>COPYRIGHT: (C)2006,JPO&NCIPI |
