| 摘要 |
PURPOSE:To obtain a reproduced image good in image density, gradiation, and sharpness, by using a mixture of toners different in amt. triboelectrified with carrier for toner. CONSTITUTION:A toner A and a toner B different in amt. triboelectrified with carrier are uniformly mixed at a constant ratio, contained in a toner replenishing device, and properly fed into a developer vessel, or the toners A, B are contained in each toner replenishing device 30, 35 respectively, and each is fed into the developer vessel 5 by rotation of each toner replenishing roll 32, 37. A mixing ratio of them is optionally selected by controlling the rotation of the rolls 32, 37 in accordance with original density, thus permitting formation of an image good in reproducibility of image density and gradation, and sharpness. |
