| 摘要 |
PURPOSE:To obtain a recording apparatus having high resolving power and high reliability, by constituting an electrode head so that first and second electric insulating supports having a large number of grooves formed to the surfaces thereof are arranged so that the valley of each groove of one support is meshed with the crest of each groove of the other support and electrode needles are provided in the trough of the grooves of the first and second supports. CONSTITUTION:Grooves arranged at a constant pitch are processed to the surfaces of first and second electric insulating supports 101, 102 and both supports are matched so that the crest of each groove of one support is meshed with the trough of each groove of the other support and electrode needles 103 are provided in the troughs 104. As the material quality of both supports, a sintered body of hexagonal boron nitride or gypsum is pref. and, in a composite such as a resin, hexagonal boron nitride etc. are used as a filler. Each electrode needle 103 is pref. a coated copper wire and the spaces formed by the first and second supports and the electrode needles are perfectly filled with a resin. The depth of each groove is deeper than the dimension of the diameter of the electrode needle and shallower than the twofold dimension of said diameter. Thus constituted electrode head 201 is pressed to recording paper 202 to be moved relatively. A return electrode 203 is provided to a part of the recording paper and electric signal is applied between said electrode 203 and one electrode needle of the electrode head from an electric signal source 204. |
