| 摘要 |
<p>PROBLEM TO BE SOLVED: To improve the responsiveness of a toner flow when an aperture electrode body is kept on or off, uniformly and quickly attain saturation electrification, and form an image having sufficient density contrast with a low driving voltage for driving the aperture electrode body. SOLUTION: This image forming device is provided with a toner feeding device 10 and an aperture electrode body 1 having multiple apertures. The aperture transit of the electrified toner 16 fed from the toner feeding device 10 via the aperture electrode body 1 is controlled, and an image is formed on the printing paper 20 arranged near the aperture electrode body 1 on the opposite side to the toner feeding device 10. A fluidity improving agent having the same polarity as the toner 16 and a fluidity improving agent having the reverse polarity to the toner 16 are added to the toner 16 at the prescribed ratio, preferably the fluidity improving agent having the reverse polarity to the toner 16 is set within the range 1/5-1/3 against the fluidity improving agent having the same polarity as the toner 16 set to 1.</p> |
