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    • 4. 发明授权
    • Bubble jet recording apparatus with processing circuit for tone
gradation recording
    • 具有用于音调灰度记录的处理电路的气泡喷射记录装置
    • US5521621A
    • 1996-05-28
    • US180831
    • 1994-01-12
    • Ichiro EndoYasushi SatoSeiji SaitoTakashi NakagiriShigeru Ohno
    • Ichiro EndoYasushi SatoSeiji SaitoTakashi NakagiriShigeru Ohno
    • B41J2/05B41J2/135B41J2/195B41J2/21B41J2/205
    • B41J2/0458B41J2/04593B41J2/195B41J2/2128
    • A recording apparatus comprises an inlet for accepting a liquid to be delivered to an outlet orifice through a liquid flow path. Liquid is supplied to the inlet for flow through the liquid flow path to a heating element, which heats liquid in the liquid flow path. Heating is sufficient to cause a change of state of the liquid (that is, to generate a bubble) and produce a force acting on the liquid which overcomes the surface tension of liquid at the orifice and thereby projects a droplet of liquid from the orifice. The temperature of the heating element is raised at each actuation to a temperature above the maximum temperature at which the liquid in the liquid flow path is subjected only to nucleate boiling so as to promote substantially instantaneous transfer of heat to the liquid proximate to the heating element and to retard the transfer of heat from the heating element to liquid at other locations in the liquid flow path. A processing circuit changes either the size or number of the projected droplets to effect tone gradation recording.
    • 记录装置包括用于接收通过液体流动路径输送到出口孔的液体的入口。 液体被供应到入口以流过液体流动路径到加热元件,加热元件加热液体流动路径中的液体。 加热足以引起液体状态的变化(即产生气泡)并产生作用在液体上的力,其克服了孔处液体的表面张力,从而从孔突出液滴。 加热元件的温度在每个致动时升高到高于液体流动路径中的液体仅经受核沸腾的最高温度的温度,以便促使热量基本上瞬时转移到靠近加热元件的液体 并且阻止在液体流路中的其它位置处的热量从加热元件传递到液体。 处理电路改变投影液滴的大小或数量,以进行色调灰度记录。