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公开(公告)号：EP1725406A4
公开(公告)日：2011-11-02
申请号：EP05714642
申请日：2005-03-16
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公开(公告)号：EP1660326B1
公开(公告)日：2009-11-11
申请号：EP04764737.5
申请日：2004-09-02
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公开(公告)号：EP1954499A1
公开(公告)日：2008-08-13
申请号：EP06838368.6
申请日：2006-11-27
摘要： A common electrohydrodynamic stimulation electrode, in response to an electrical signal, synchronously stimulates all members of a group of fluid jets emitted from corresponding nozzle channels to form a corresponding plurality of continuous streams of drops. The common electrohydrodynamic stimulation electrode includes an electrical contact operable to transmit the electrical signal to each member of the nozzle channels via a contiguous electrically conductive portion. The contiguous electrically conductive portion forms a permanently electrically conductive path between and forms a portion of each nozzle channel. Synchronous stimulation of each of the fluid jets facilitates accurate phase locking of print data dependent charging of the drop streams.
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公开(公告)号：EP1628832A2
公开(公告)日：2006-03-01
申请号：EP04821194.0
申请日：2004-02-24
申请人： IMAJE S.A.
发明人： BARBET, Bruno , HENON, Pierre
IPC分类号： B41J2/015
CPC分类号： B41J2/115 , B41J2/025 , B41J2/105 , B41J2002/022 , B41J2002/033
摘要： The invention relates to an inkjet printer (10) comprising a print head (1) which is equipped with an internal stimulation system (31). According to the invention, the stimulation system can be used to create: (i) an upstream break in a break position (11) upstream of a jet (30), said break forming drops (33) which are used for printing and jet segments (38) in a zero potential area; and (ii) a break in the jet (30) or jet segment (38) in a downstream break position (12), said break forming drops (43) which are recovered in a non-zero potential area. A sorting system (35) which is common to all of the jets (30) of the head can be used to simplify the head and to reduce the size thereof.
摘要翻译： 本发明涉及包括配备有内部刺激系统（31）的打印头（1）的喷墨打印机（10）。 根据本发明，刺激系统可用于产生：（i）射流（30）上游的断裂位置（11）的上游断裂，所述断裂形成滴（33），其用于印刷和喷射段 （38）置于零电位区域; 和（ii）在下游中断位置（12）中的射流（30）或射流段（38）中的断裂，所述断裂形成液滴（43）被回收到非零电势区域中。 可以使用头部的所有喷嘴（30）共用的分类系统（35）来简化头部并减小其尺寸。
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公开(公告)号：EP0622195A3
公开(公告)日：1996-12-04
申请号：EP94106214.3
申请日：1994-04-21
发明人： Stewart, Lowell
IPC分类号： B41J2/115
CPC分类号： B41J2/125 , B41J2/115 , B41J2/16579
摘要： The optical drop detect circuit includes an optical sensor (17) for providing an electrical output indicative of a presence of an ink drop, a transconductance amplifier (21) responsive to the output of said optical sensor, first and second cascaded bandpass amplifiers (23,25) responsive to the transconductance amplifier, a first comparator circuit (31,41) responsive to the output of the cascaded bandpass amplifiers for providing an output pursuant to optical sensing of a first minimum ink drop size, and a second comparator circuit (32,42) responsive to the output of the cascaded bandpass amplifiers for providing an output pursuant to optical sensing of a second minimum ink drop size.
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6.发明公开METHOD AND APPARATUS FOR ON LINE PHASING OF MULTIPLE NOZZLE INK JET PRINTERS 失效方法和系统上线PHASENNACHREGELUNG喷墨打印机的多喷嘴排列。
公开(公告)号：EP0668825A1
公开(公告)日：1995-08-30
申请号：EP94900218.0
申请日：1993-11-16
IPC分类号： B41J2
CPC分类号： B41J2/115
摘要： A multiple nozzle continuous ink jet printer has a common nozzle block (10) with an array of nozzles (1, 2, 3, 4, 5, 6, 7) having respective charge electrodes (12) operated by respective drop charging circuits (45, 46, 47, 48, 49, 50, 51). A pilot nozzle (34) is provided in operative proximity to the nozzles (1 to 7) to monitor and detect changes in phase due to changes in ink parameters such as temperature, viscosity and pressure. A phase selection means (42) is arranged to alter the clock phase (33) applied to the pilot nozzle drop charging circuit (44) responsive to a sensor means (38, 40) thereby maintaining optimal charging by the pilot charge electrode (36). During system initialisation the correct break-off phase relationship is established for each charge electrode (12). During printing the phase selection logic (25, 26, 27, 28, 29, 30, 31) for the printing array (1 to 7) is altered based on the alteration of the clock phase to the pilot nozzle (34).
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7.发明公开
公开(公告)号：EP0652831A1
公开(公告)日：1995-05-17
申请号：EP93917942.0
申请日：1993-07-28
发明人： STAMER, Michael, E. , ARWAY, George
IPC分类号： B41J2
摘要： Flight time of a stream of ink drops is measured and compared against a set point to determine variations therefrom. Variations due to changes in the ink composition are compensated by adding or withholding solvent in proportion to the detected change. Changes due to variations in nozzle drive voltage result in the computation and use of a new flight time set point value to avoid erroneous corrective action.
摘要翻译： 测量墨滴流的飞行时间并与设定点进行比较以确定其变化。 通过与检测到的变化成比例地添加或扣留溶剂来补偿由于油墨组合物变化引起的变化。 喷嘴驱动电压变化导致计算和使用新的飞行时间设定值，必要时可避免错误的纠正措施。
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8.发明公开
公开(公告)号：EP0551967A2
公开(公告)日：1993-07-21
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.摘要翻译： 喷墨打印机自动调节施加到换能器（159）的调制信号的幅度，以将墨水喷射成液滴。 根据喷射分解相位相对于调制信号的变化确定的喷射断裂长度的变化来确定正确的调制幅度。 打印机具有可互换的打印头（3），其可以具有不同的喷嘴尺寸。 指定用于特定打印头（3）的最佳性能所需的墨水压力，喷射速度和电荷校正的特定值的校准代码可被输入到相应地操作打印机的控制逻辑（93）中。 大多数打印头部件安装在安装基板（111）上，所有的连接都被安装到安装基板（111）的下侧，并用灌封组合物密封，以避免损坏。 墨水粘度根据墨水压力而受到控制，墨水压力根据喷墨速度而受到控制。 因此，无需使用粘度计即可维护所有三个参数。 通过在间隔开的传感器（89,91）上由充电液滴感应的信号来感测喷墨速度，其输出被连接在一起并被馈送到公共比较器（105），这简化了结构。 响应询问，输出打印机的内部条件。 这允许远程故障诊断，例如 通过电话。 打印机自动执行启动和停止喷射时所需的测试和操作，并且当传感器输入指示喷嘴堵塞时自动执行喷嘴清洁程序，从而提高了操作的便利性。 墨枪（75）具有从双压电晶体压电晶体（159）逐渐变细的墨水腔（145），该双压电晶片压电晶体仅在一个半径处被抑制。 枪是高效率和通用的，可以在一定范围的频率和一定范围的喷嘴尺寸上操作，并且优选地是通过共振来操作的。 打印字符的点阵图案存储在字符存储器（175）中，并且充电电极电平存储在充电电平存储器（177）中，根据是否存在其他附近的点，每个点位置存储几个替代电平 打印。 这为墨滴的静电和空气动力效应提供了补偿。 未印刷液滴的类似补偿由历史校正存储（179）提供。 防护液滴的提供由定序器（185）控制。 施加到充电电极（127）的电压补偿充电电路放大和喷射到电极电容耦合的变化。
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10.发明公开
公开(公告)号：EP0202032A3
公开(公告)日：1988-01-20
申请号：EP86302791
申请日：1986-04-15
摘要： Randomly generated artificial perturbation signals are acoustically coupled to fluid jets to artificially stimulate droplet formation at a rate which varies. Such changes . minimize the discernible effects of anomalies in droplet- formation (e.g. along the cross-machine dimension of an extended orifice array) caused by standing acoustic waves or other phenomena. A relatively low frequency bandwidth- limited square wave with randomly occurring transitions has a controlled amplitude related to a desired magnitude of deviation in the rate of droplet stimulation. This first random signal is used, in the exemplary embodiment, to control the frequency of a frequency modulated oscillator having a relatively higher mean frequency related to the naturally expected rate of droplet formation. As a result, piezoelectric crystal drive furnished by the oscillator randomly varies between upper and lower frequency limits. Provision is also made to ensure that such transition between upper and lower frequency limits is accomplished in a controlled and relatively gradual manner.
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