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    • 12. 发明授权
    • Ink jet printer
    • 喷墨打印机
    • US4801955A
    • 1989-01-31
    • US74306
    • 1987-07-15
    • Masayoshi MiuraKenji AkamiGen OdaTamotsu KojimaHiroshi Naito
    • Masayoshi MiuraKenji AkamiGen OdaTamotsu KojimaHiroshi Naito
    • B41J2/16G01D15/18
    • B41J2/1623B41J2/1606B41J2/162B41J2/1629B41J2/1631B41J2/1632B41J2202/02
    • An ink jet printer having a print head which comprises a front nozzle member having a front channel, a housing secured to the front nozzle member, and a rear nozzle member which defines with the housing a liquid chamber and further defines with the front nozzle member a laminar airflow chamber. The rear nozzle member has a forwardly projecting nozzle and a rear channel extending from the liquid chamber through the projecting nozzle in axial alignment with the front channel to form a meniscus at the front end. An electric field gradient is established between the front channel and the meniscus to cause the latter to extend toward the front channel and expelled through the front channel. A portion of the front nozzle member is rendered liquid-repellant to prevent the field distribution from being seriously disturbed by an ink layer formed on it by stray liquid particles.
    • 一种具有打印头的喷墨打印机,该打印头包括具有前通道的前喷嘴构件,固定到前喷嘴构件的壳体和与所述壳体限定液室并且与前喷嘴构件a进一步限定的后喷嘴构件 层流气流室。 后喷嘴构件具有向前突出的喷嘴和从所述液室延伸通过所述突出喷嘴与所述前通道轴向对准的后通道,以在前端形成弯月面。 在前通道和弯液面之间建立电场梯度,以使后者朝向前通道延伸并通过前通道排出。 前喷嘴部件的一部分被赋予防液性,以防止由分散的液体颗粒在其上形成的油墨层严重干扰场分布。