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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：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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5.发明公开Nozzle drive control system and method for ink jet printing 失效Düsenantriebssteuerung和Tintenstrahldruckverfahren。
公开(公告)号：EP0628412A2
公开(公告)日：1994-12-14
申请号：EP94202383.9
申请日：1990-03-22
摘要： A method of, and a control circuit for, determining the exciting voltage to be applied to the nozzle of an ink jet printer to break a stream of ink into droplets for printing includes the steps of slowly increasing the exciting voltage from a minimum value and detecting and recording the value C(H) at which droplet formation first occurs closest to the nozzle. The exciting voltage for printing is estimated by applying electrical test patterns (Figure 6) to the ink droplets such that the patterns will vary in phase relative to droplet timing whereby only some of the test patterns will successfully charge the droplets. After that, those droplets which have been successfully charged are detected and the value C(H) determined from the change in the sequence of detected charge patterns. The exciting voltage for printing is estimated according to the formula V(est) = C(H) - E , where E is a voltage related to the performance on the ink.
摘要翻译： 一种用于确定要施加到喷墨打印机的喷嘴的激励电压以将墨水流打破成液滴以进行打印的方法和控制电路包括以下步骤：从最小值缓慢增加激励电压并检测 并记录液滴形成第一次最接近喷嘴的值C（H）。 通过对墨滴施加电测试图案（图6）来估计印刷的激发电压，使得图案相对于液滴正时相位变化，由此仅一些测试图案将成功地对液滴充电。 之后，检测到成功充电的液滴，并根据检测到的电荷模式顺序的变化确定值C（H）。 根据公式V（est）= C（H）-E估算印刷的激励电压，其中E是与油墨性能相关的电压。
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公开(公告)号：EP2714405B1
公开(公告)日：2018-10-24
申请号：EP12727462.9
申请日：2012-05-23
摘要： A continuous liquid ejection system includes a liquid chamber in fluidic communication with a nozzle. The liquid chamber contains liquid under pressure sufficient to eject a liquid jet through the nozzle. A drop formation device is associated with the liquid jet. The drop forming device is actuatable to produce a modulation in the liquid jet to selectively cause portions of the liquid jet to break off into one or more pairs of drops traveling along a path. Each drop pair is separated on average by a drop pair period. Each drop pair includes a first drop and a second drop. The drop formation device is also actuatable to produce a modulation in the liquid jet to selectively cause portions of the liquid jet to break off into one or more third drops traveling along the path separated on average by the same drop pair period. The third drop is larger than the first drop and the second drop. A charging device includes a charge electrode associated with the liquid jet and a source of varying electrical potential between the charge electrode and the liquid jet. The source of varying electrical potential provides a waveform that includes a period that is equal to the period of formation of the drop pairs or the third drops, the drop pair period. The waveform also includes a first distinct voltage state and a second distinct voltage state. The charging device and the drop formation device are synchronized to produce a first charge to mass ratio on the first drop of the drop pair, a second charge to mass ratio on the second drop of the drop pair, and a third charge to mass ratio on the third drop. The third charge to mass ratio is substantially the same as the first charge to mass ratio. A deflection device causes the first drop of the drop pair having the first charge to mass ratio to travel along a first path, and causes the second drop of the drop pair having the second charge to mass ratio to travel along a second path, and causes the third drop having a third charge to mass ratio to travel along a third path. The third path is substantially the same as the first path.
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公开(公告)号：EP2828083A1
公开(公告)日：2015-01-28
申请号：EP13714093.5
申请日：2013-03-14
IPC分类号： B41J2/115
CPC分类号： B41J2/115
摘要： A group timing delay device shifts the timing of drop formation waveforms supplied to drop formation devices of one of first and second nozzle groups so that print drops from the nozzle groups are not aligned relative to each other along a nozzle array direction. A charging device includes a common charge electrode associated with liquid jets from the nozzle groups and a source of varying electrical potential between the charge electrode and liquid jets which provides a charging waveform that is independent of a print and non-print drop pattern. The charging device is synchronized with the drop formation devices and the group timing delay device to produce a print drop charge state on print drops of a drop pair, a first non-print drop charge state on non-print drops of the drop pair, and a second non-print drop charge state on third drops.
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公开(公告)号：EP2714405A1
公开(公告)日：2014-04-09
申请号：EP12727462.9
申请日：2012-05-23
摘要： A continuous liquid ejection system includes a liquid chamber in fluidic communication with a nozzle. The liquid chamber contains liquid under pressure sufficient to eject a liquid jet through the nozzle. A drop formation device is associated with the liquid jet. The drop forming device is actuatable to produce a modulation in the liquid jet to selectively cause portions of the liquid jet to break off into one or more pairs of drops traveling along a path. Each drop pair is separated on average by a drop pair period. Each drop pair includes a first drop and a second drop. The drop formation device is also actuatable to produce a modulation in the liquid jet to selectively cause portions of the liquid jet to break off into one or more third drops traveling along the path separated on average by the same drop pair period. The third drop is larger than the first drop and the second drop. A charging device includes a charge electrode associated with the liquid jet and a source of varying electrical potential between the charge electrode and the liquid jet. The source of varying electrical potential provides a waveform that includes a period that is equal to the period of formation of the drop pairs or the third drops, the drop pair period. The waveform also includes a first distinct voltage state and a second distinct voltage state. The charging device and the drop formation device are synchronized to produce a first charge to mass ratio on the first drop of the drop pair, a second charge to mass ratio on the second drop of the drop pair, and a third charge to mass ratio on the third drop. The third charge to mass ratio is substantially the same as the first charge to mass ratio. A deflection device causes the first drop of the drop pair having the first charge to mass ratio to travel along a first path, and causes the second drop of the drop pair having the second charge to mass ratio to travel along a second path, and causes the third drop having a third charge to mass ratio to travel along a third path. The third path is substantially the same as the first path.
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公开(公告)号：EP1917143B1
公开(公告)日：2012-04-04
申请号：EP06800580.0
申请日：2006-07-31
CPC分类号： B41J29/393 , B41J2/17566
摘要： Embodiments of ink short detection are disclosed.
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公开(公告)号：EP1917143A1
公开(公告)日：2008-05-07
申请号：EP06800580.0
申请日：2006-07-31
CPC分类号： B41J29/393 , B41J2/17566
摘要： Embodiments of ink short detection are disclosed.
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