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公开(公告)号：EP0968088A1
公开(公告)日：2000-01-05
申请号：EP97950282.0
申请日：1997-12-18
摘要： A method is disclosed for adjusting the amplitude of the pressure modulation waveform in a multi-nozzle continuous ink jet printhead having a pressure modulator for causing streams of ink emitted from the nozzles to be broken up into individual droplets, and charge electrodes and charge electrode controllers for controllably applying a charge to individual ones of the droplets in each stream. The method involves generating a modulation waveform to operate the pressure modulator to cause droplets to be generated in each stream, operating the charge controllers to supply a charge signal waveform to each charge electrode; and periodically determining the phase relationship between the charge signal waveforms applied by the charge controllers and the pressure modulation waveform to achieve satisfactory charging of the droplets, determining the spread of the phase relationships to achieve satisfactory charging of the droplets, and thereafter incrementally adjusting the amplitude of the pressure modulation waveform upwardly or downwardly to optimise the break-up length of the droplet streams.
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公开(公告)号：EP0964785A1
公开(公告)日：1999-12-22
申请号：EP97950276.0
申请日：1997-12-18
IPC分类号： B41J2
摘要： Disclosed is a method of printing using a multi-nozzle ink jet print head having a pressure modulator for causing streams of ink emitted from the nozzles to be broken up into individual droplets. The nozzles are divided into a plurality of groups of nozzles, and groups of charge electrodes correspond, each group of charge electrodes having a respective charge controller. In the method a modulation waveform is generated to operate the pressure modulator to cause droplets to be generated in each stream. The charge controllers are operated to supply a charge signal waveform to the charge electrodes and charge droplets in the streams. The phase relationship of the charge signal waveform is adjusted relative to the modulation waveform.
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公开(公告)号：EP0755790A1
公开(公告)日：1997-01-29
申请号：EP95202047.7
申请日：1995-07-25
摘要： The device comprises a recording head (1) with a substantially linear array of nozzles (19) for the emission of droplets (45) of ink. Deflection means (25,27) for electrically charging and electrostatically deflecting the emitted droplets (45) are arranged in front of each nozzle (19) and the device further comprises transportation means (7,9) for transporting a record carrier (11) in such a manner that a surface of the record carrier faces the nozzles and moves in a direction (13) transverse to the array of the nozzles. The recording device is a droplet on demand recording device, each nozzle (19) communicating with a pressure chamber (17) associated with actuator means (15) for emitting an ink droplet (45) only when a predetermined signal is applied to the actuator means. The deflection means (25,27) are conceived to deflect the droplets over a range of angles in a direction substantially parallel to the array of the nozzles (19) and deflection control means (39) are provided to control the angle of deflection of the droplets so that the entire width of the record carrier (11) can be covered with ink droplets (45) from a single array of nozzles.
摘要翻译： 该装置包括记录头（1），该记录头具有用于喷射墨滴（45）的基本上线性的喷嘴（19）阵列。 在每个喷嘴（19）的前面布置有用于对所发射的液滴（45）进行充电和静电偏转的偏转装置（25,27），并且该装置还包括用于将记录载体（11） 使得记录载体的表面面向喷嘴并且在横向于喷嘴阵列的方向（13）上移动。 该记录装置是一个液滴按需记录装置，每个喷嘴（19）与一个与致动装置（15）相关的压力腔（17）连通，用于仅当预定信号施加到致动装置 。 偏转装置（25,27）被设想为在基本上平行于喷嘴（19）阵列的方向上在一定范围的角度上偏转液滴，并且提供偏转控制装置（39）以控制偏转装置 使得记录载体（11）的整个宽度可以被来自单个喷嘴阵列的墨滴（45）覆盖。
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54.发明授权
公开(公告)号：EP0460166B1
公开(公告)日：1995-06-21
申请号：EP91901428.2
申请日：1990-12-06
IPC分类号： B41J2/115
CPC分类号： B41J2/115
摘要： A method for avoiding drop charge switching errors in continuous ink jet printing of the kind using stimulation to regulate ink drop break-off of a linear array of ink streams. The method includes the steps of: controlling ink drop stimulation so that the phase distribution of drop break-off along the length of the ink stream array remains stable in time and charging stimulated drop streams in at least two different groups during at least two different address periods which are offset in phase so that all drop streams are addressed during a drop break-off condition.
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55.发明授权USER SELECTABLE DROP CHARGE SYNCHRONIZATION FOR TRAVELLING WAVE-STIMULATED, CONTINUOUS INK JET PRINTERS 失效用户可选液滴充电SYNC由行波激发连续运行COLOR喷墨打印机。
公开(公告)号：EP0458943B1
公开(公告)日：1995-01-25
申请号：EP91901389.6
申请日：1990-12-06
IPC分类号： B41J2/115
CPC分类号： B41J2/115
摘要： A system for selectively shifting the phase of drop charging along the array of ink jets of a continuous ink jet printer by producing a replicate signal of the drop stimulation signal; selectively shifting the phase of the replicate signal to provide a phase control signal; synchronizing a media feed tachometer signal to the phase control signal to produce a print enable signal; and controlling address of the charge electrodes with the print enable signal. The system further includes a selection mode wherein drop charge phase can be made random by selecting synchronization with the media feed tachometer signal.
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公开(公告)号：EP0551967A3
公开(公告)日：1993-08-25
申请号：EP93200817.0
申请日：1988-10-28
发明人： Keeling, Michael R., c/o Linx Printing Tech. PLC , Weinberg, Hillar, c/o Linx Printing Tech. PLC
IPC分类号： B41J2/195
摘要： An ink jet printer automatically adjusts the amplitude of the modulation signal applied to a transducer (159) to break the ink jet into droplets. Correct modulation amplitude is determined from changes in jet break-up length, as determined by changes in jet break-up phase relative to the modulation signal. The printer has interchangeable print heads (3), which may have different nozzle sizes. A calibration code, specifying the particular values of ink pressure, jet velocity and charge correction required for optimum performance of a particular print head (3), may be entered into control logic (93), which operates the printer accordingly. Most print head components are mounted on a mounting substrate (111), with all connections being made to the underside of the mounting substrate (111) and sealed with a potting compound, to avoid damage. Ink viscosity is controlled in response to ink pressure, which is in term controlled in response to ink jet velocity. Thus all three parameters are maintained without the need for a viscosity meter. Ink jet velocity is sensed by means of signals induced by charged drops on spaced apart sensors (89, 91), the outputs from which are wired together and fed to a common comparator (105), which simplifies construction. Internal conditions of the printer are output in response to interrogation. This permits remote fault diagnosis, e.g. over the telephone. Ease of operation is improved because the printer automatically performs the tests and operations required when starting and stopping the jet, and it automatically performs a nozzle cleaning routine when sensor inputs indicate a nozzle blockage. The ink gun (75) has an ink cavity (145) which tapers away from a bimorph piezoelectric crystal (159) which is restrained from flexing at one radius only. The gun is highly efficient and versatile, may operate at a range of frequencies and a range of nozzle sizes, and is preferably operated off resonance. Dot patterns for printed characters are stored in a character store (175), and charging electrode levels are stored in a charge level store (177), with several alternative levels being stored for each dot position for use according to whether other nearby dots are being printed. This provides compensation for the electrostatic and aerodynamic effects of ink droplets on one another. Similar compensation for unprinted droplets is provided by a historic correction store (179). The provision of guard drops is controlled by a sequencer (185). The voltage applied to the charging electrode (127), is compensated for variations in charging circuit amplification and jet-to-electrode capacitive coupling.
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57.发明公开Procédé de projection de liquide et dispositif d'impression haute-résolution dans une imprimante à jet d'encre continu mettant en oeuvre ce procédé 失效一种用于连续喷墨打印机和方法执行排出液体和装置用于高分辨率印刷方法。
公开(公告)号：EP0521764A1
公开(公告)日：1993-01-07
申请号：EP92401840.1
申请日：1992-06-29
申请人： IMAJE S.A.
CPC分类号： B41J2/075 , B41J2/025 , B41J2/115 , B41J2002/033
摘要： La présente invention concerne un procédé de projection de liquide et un dispositif d'impression haute-résolution dans une imprimante à jet d'encre continu stimulé.
Un jet d'encre (1) est fractionné en gouttes (11) au voisinage d'un dispositif de charge (7) électrostatique de ces gouttes créant un champ électrique asymétrique par rapport à l'axe (D) du jet (1). Le procédé comprend tout d'abord la création d'une microgoutte (14) unique à l'extrémité amont d'une goutte principale, par application d'une tension de charge (V M ) supérieure à la tension de Rayleigh, dans le dispositif de charge lors de l'apparition de cette goutte principale. Ensuite, la déflexion de la microgoutte destinée à l'impression est obtenue par application d'une tension de charge (V c ) à la goutte principale suivante, inférieure à la tension de charge (V M ) et à la tension de Rayleigh, modulable en fonction de la trajectoire choisie pour la microgoutte vers le support d'impression (15).摘要翻译： 本发明涉及一种液体喷射方法和在一个连续的，刺激的喷墨打印机的高分辨率打印设备。 墨（1）的喷射在静电荷装置附近分裂成液滴（11）（7），用于合成滴电场所有这一切是不对称的相对于所述喷射的轴线（D）的制造（1） ， 该方法包括，首先，创建在主液滴的上游端在该主的外观的单个微滴（14），由一个充电电压（VM）高于在充电装置中的瑞利电压大的应用程序的 下降。 接着，将微滴用于打印的偏转由应用的充电电压（Vc）以下主要降，比充电电压（VM）及瑞利电压，所有这些是可调制作为所选择的轨迹的函数低带来的 用于向所述打印介质（15）的微滴。
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公开(公告)号：EP0386049A1
公开(公告)日：1990-09-12
申请号：EP88909341.0
申请日：1988-10-28
发明人： KEELING, M. R. Linx Printing Technologies Limited , WEINBERG, H. Linx Printing Technologies Ltd.
摘要： Une imprimante à jet d'encre règle l'amplitude du signal de modulation appliqué à un transducteur (159) afin de réduire le jet d'encre en gouttelettes. La modulation d'amplitude correcte est déterminée à partir de variations de la longueur de réduction du jet, elle-même déterminée par des variations de la phase de réduction par rapport au signal de modulation. L'imprimante dispose de têtes d'impression (3) interchangeables, pouvant avoir des tailles d'ajutage différentes. On peut entrer dans la logique de commande (93) un code d'étalonnage spécifiant les valeurs de pression d'encre, la vitesse du jet et la correction de charge nécessaires à une efficacité optimum d'une tête d'impression particulière (3), ladite logique faisant fonctionner l'imprimante en conséquence.
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59.发明公开Method and apparatus for high resolution ink jet printing 失效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
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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公开(公告)号：EP0057472B1
公开(公告)日：1988-11-09
申请号：EP82100804.2
申请日：1982-02-04
发明人： Gamblin, Roger Lotis
IPC分类号： B41J3/04
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