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3. 发明公开

EP0293496A1 Method and apparatus for high resolution ink jet printing 失效转让
标题翻译： Methode undGerätfürhochauflösendesTintenstrahldrucken。
公开(公告)号：EP0293496A1
公开(公告)日：1988-12-07
申请号：EP87105560.4
申请日：1987-04-14
申请人： Hertz, Hans Martin , Hertz, Thomas Gustav
发明人： Hertz, Carl Hellmuth , Samuelsson, Bo A.
IPC分类号： B41J2/07
CPC分类号： B41J2/2128 , B41J2/115 , B41J2002/1853
摘要： An ink jet printing method is disclosed, wherein a record is produced by applying varying amounts of ink on a plurality of pixel locations of a record medium, said method comprising the steps:

a) generating an ink jet directed towards said record medium, said ink jet breaking up into a series of drops with a predetermined drop formation rate,
b) applying an electric charge of predetermined magnitude to selected drops,
c) deflecting each charged drop as a function of its charge to determine whether the drop travels along a recording path to reach said recording medium or is intercepted,
d) producing relative transverse movement between said drop path and said recording medium,
e) generating a first signal indicative of the drop formation rate,
f) generating a second signal from said relative movement, the second signal being indicative that pixel position on the record medium is aligned with said drop path,
g) deriving a density value for the aligned pixel position in response to said a second signal,
h) generating a print pulse signal of predetermined length between leading and trailing edges in response to said derived density value and said first signal, said density value controlling the length and said first signal controlling the time of occurrence of the leading edge of said print pulse signal,
i) controlling said charging step (b) by means of said print pulse signal.

To reduce the graininess of the image recorded by the jet, said first and second signals are synchronized to establish a predetermined time relationship between the time at which said density value deriving step (g) occurs and the time when the leading edge of the print pulse occurs.
摘要翻译：公开了一种喷墨打印方法，其中通过在记录介质的多个像素位置上施加不同量的墨来产生记录，所述方法包括以下步骤：a）产生朝向所述记录介质的喷墨，所述墨射流以预定的液滴形成速率分裂成一系列液滴，b）对所选择的液滴施加预定大小的电荷，c）根据其电荷使每个充电液滴偏转，以确定液滴是否沿着记录路径行进到达所述记录介质或被截取，d）在所述液滴路径和所述记录介质之间产生相对的横向运动，e）产生指示液滴形成速率的第一信号，f）从所述相对运动产生第二信号，信号指示记录介质上的像素位置与所述液滴路径对准，g）响应于所述液滴路径导出对齐的像素位置的浓度值第二信号，h）响应于所述导出的密度值和所述第一信号产生在前缘和后缘之间的预定长度的打印脉冲信号，所述密度值控制长度，并且所述第一信号控制前缘的出现时间所述打印脉冲信号，i）通过所述打印脉冲信号控制所述充电步骤（b）。为了减少由射流记录的图像的颗粒度，所述第一和第二信号被同步，以在所述浓度值导出步骤（g）发生的时间与所述打印脉冲的前沿之间的时间之间建立预定的时间关系发生。

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