| 摘要 |
PURPOSE:To provide a nozzle head with small aperture in narrow spacing, by a method wherein two nozzle head members have surface of water wetting portions and water repelling portions, being alternately arranged in parallel, and are opposed with each other, and a lot of nozzles are formed along the water wetting portion. CONSTITUTION:A nozzle head for ink jet comprises a first nozzle head member 9 having surface of water wetting portions 7a-7d of given and water repelling portions 8a-8d of given width, being alternately arranged in parallel, and a second nozzle head member 10 in similar constitution to the first member 9. Both members 9, 10 are opposed with spacing of about tens of mum between surface of both members. In order to constitute the nozzle head member, manufacturing process of PS type in known offset printing can be used. A nozzle of fine size can be formed at high density although it was not obtained in conventional mechanical process, and output recording can be obtained in high resolving power and high density. Furthermore a lot of nozzle heads can be manufactured easily in low cost.
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