Patent ID: 6322199
Filing Date: 2001-11-27
Classification: B41J,G03G

Abstract:
A direct recording apparatus comprising:a retaining member for retaining charged recording particles;a back electrode opposing said retaining member to electrostatically attract said recording particles;a PC board disposed between said retaining member and said back electrode so as to form a passage with said back electrode through which a recording sheet passes, and provided with apertures having diameters through which said recording particles can pass;a first electrode disposed near each of said apertures in said PC board, to which a first voltage is applied in order to more strongly attract said recording particles retained on said retaining member toward said back electrode; anda second electrode disposed near each of said apertures and nearer said back electrode than said first electrode in said PC board, to which a second voltage is applied so that a group of recording particles passing through said aperture converges;wherein gradation of an image to be recorded is controlled by adjusting an application time of said first voltage to be applied to said first electrode, said application time depending on the polarity of said second voltage to be applied to said second electrode.