| 摘要 |
<p>PURPOSE:To provide a developing device capable of suppressing carrier sticking and toner scattering and also capable of stably obtaining a clear image of high image quality whose density is sufficently high and having no roughness. CONSTITUTION:Two-component developer with magnetic carrier whose magnetization per unit volume is <=150emu/cm<3> in a magnetic field of 100 gaus is used. And a magnet roller 23 is constituted of a magnet 23a made of 1st magnet material and a magnet 23b made of 2nd magnet material, the maximum magnetic flux density on a developing sleeve 2 by the 1st magnet 23a is higher than the maximum magnetic flux density on the sleeve 21 by the 2nd magnet 23b, and the 1st magnet 23a is positioned in a developing area.</p> |
