| abstract |
(57) [Summary] [Purpose] To provide a high-quality and highly reliable contact transfer device that does not suffer from voids, decrease in density, stains on the back of paper, etc. regardless of the environment and durability. (EN) Provided is a low-cost and small-sized contact transfer device that uses a power supply that does not require complicated control. [Structure] Means 10 for applying a bias to a transfer member 104 In the transfer device for transferring the toner, which is obtained by externally mixing at least two kinds of external additives having different average particle diameters on the latent image carrier 101 to the resin mother particles of the toner 106 and transferring the toner to the transfer target, The apparent density of the loose toner is R (g / cc), and the hardness of the transfer member (JISA) is H. Then, the relation of R ≧ 0.350 + 0.001 × H is satisfied. |