| 摘要 |
PURPOSE:To prevent stagnation of a toner and to maintain the toner feeding device safe by installing a right rotation screw and a reverse rotation screw in the same length and in parallel to each other in the inside of a toner conveying pipe, and rotating the reverse rotation screw in a speed higher than the right rotation screw. CONSTITUTION:The toner conveyed with a screw in the toner conveying pipe 3 is dropped from an opening 6, and dispersed and fed through a slit 9 connecting the lower part of the roll case 8 and the casing 11 of the developing device 10 to the device 10. The toner not dropping out of the opening 6 and remaining there is returned smoothly to a box 2 by rotating the reverse rotation screw 5 in a speed higher than the right rotation screw 4 by 10-50%. As a resuflt, trouble, such as stuffing of the end of the toner conveyor pipe 3 with the toner, can be prevented. |
