| 摘要 |
The object of the present invention is to provide an image-forming apparatus which does not cause a clogging of the apertures for a long time and supplies a sharp image. The present invention provides an image-forming apparatus which comprises (i) a toner-supporting member which supports and conveys a toner, (ii) a back electrode which is arranged on the opposite side of the toner-supporting member at a predetermined interval, (iii) a head equipped with a plural aperture and a recording electrode which is arranged in such a way that it surrounds each aperture, said head being arranged between the toner-supporting member and the back electrode, and (iv) a driver which applies a voltage to the recording electrode in response to an image signal and which causes the toner supported on the toner-supporting member to adhere jettingly to a recording medium through the apertures, wherein an opening ratio of the apertures is 40-95% when the toner is jettingly adhered to the recording medium 20 times.
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