EP1007363B1 - Systeme de commande de projection de liquide electriquement conducteur - Google Patents

Systeme de commande de projection de liquide electriquement conducteur Download PDF

Info

Publication number
EP1007363B1
EP1007363B1 EP98928414A EP98928414A EP1007363B1 EP 1007363 B1 EP1007363 B1 EP 1007363B1 EP 98928414 A EP98928414 A EP 98928414A EP 98928414 A EP98928414 A EP 98928414A EP 1007363 B1 EP1007363 B1 EP 1007363B1
Authority
EP
European Patent Office
Prior art keywords
jet
control system
drops
potentials
electrical
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP98928414A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP1007363A1 (fr
Inventor
Paul Bajeux
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Markem Imaje SAS
Original Assignee
Imaje SA
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Imaje SA filed Critical Imaje SA
Publication of EP1007363A1 publication Critical patent/EP1007363A1/fr
Application granted granted Critical
Publication of EP1007363B1 publication Critical patent/EP1007363B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J2/00—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
    • B41J2/005—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by bringing liquid or particles selectively into contact with a printing material
    • B41J2/01—Ink jet
    • B41J2/07—Ink jet characterised by jet control
    • B41J2/075—Ink jet characterised by jet control for many-valued deflection
    • B41J2/08—Ink jet characterised by jet control for many-valued deflection charge-control type

Definitions

  • the present invention relates to a system for electrically sprayed liquid control driver.
  • a system for electrically sprayed liquid control driver is in particular usable in an inkjet printhead using the continuous jet process.
  • each jet of electrically conductive liquid is split into drops.
  • the drops are electrically charged and their path is then deflected by a field electric which, depending on information to reproduce, deviate each drop either to a gutter ink recovery, either to the support where ink must be deposited.
  • the ink is pressurization upstream of an ejection nozzle.
  • To the output of the nozzle there is emission of a continuous jet.
  • This continuous jet is processed by the control system projection of liquid through several organs performing various functions.
  • the jet is first divided in drops by an organ controlled by a signal splitting.
  • the drops separating of the continuous jet are electrically charged under the effect of the electric field established between the charging electrode and the liquid. They then pass in a field deflection electric generated between two electrodes or deflection plates to be deflected according to the value of this electric field.
  • drops On leaving the system liquid spray control, drops are either recovered to return to the circuit ink supply, either deposited on the support.
  • control systems for projection of liquid put into service on printers exhibit a number disadvantages. They require many parts produced and positioned with precision. These parts are complex and must be separated by so-called safety distances and / or by shields and by empty or insulating spaces ensuring the separation of functions, which unnecessarily lengthens the path of the drops.
  • the pieces making each function create discontinuous surfaces which cause local electric field elevations in the interior space, suitable for discharges electric. These surfaces are also difficult to clean when removing material residue to inside the print head. Rooms performing each function being supported by insulators, their surfaces can charge electrically variably and the liquid undergoes then parasitic electric fields. The result random deflections of the drops. With such control systems, the electrical voltages set work can reach 10 kV.
  • Document WO 94/16896 recommends the use of electrically conductive plastic for realize a projection control system of electrically conductive liquid. This allows to reduce the cost, the number of additional parts such as shields and simplify wiring. Matter electrically conductive plastic also picks up electrical charges.
  • This plastic material can be polyacetylene which is a conductive polymer intrinsic. Preferably, it is a resin plastic such as Nylon®, polyester, acetal containing conductive fibers (carbon, steel stainless) coated with nickel. The heterogeneity of a fibrous resin grows on the surface, particularly with molded manufacturing. The insulating part of the fibrous plastic being rather on the surface, the static charges can accumulate there.
  • WO-A-88/01572 discloses a control system for projection of an electrically conductive liquid and emitted in the form of a jet under pressure, corresponding in the preamble of claim 1.
  • a harmful phenomenon in these printheads inkjet comes from the possible interaction between drops in flight.
  • a good control system for projection must provide a drop path weak to fight against this phenomenon.
  • Some manufacturers have chosen not to coat the conductive deflection plates with a dielectric material. In order to avoid discharges accidental electrostatic, they place resistors in the power supply circuit deflection plates to limit the flow of discharge in the circuit. Several types of discharge may occur during operation a printer.
  • the first type of discharge is given in the case of a voltage applied between two well-polished plates.
  • the electric field is identical everywhere and the shock ionization conditions are fulfilled uniformly on average.
  • Thermal agitation causes, in a place, at a given time, an elevation brutal current which then passes from a quasi value null to a gigantic value if there is no resistors in the circuit.
  • the stored energy is used almost completely in a brief instant related to the shape of the storage capacitor, and this shape defining the electromagnetic regime of the transient of discharge.
  • the power density dissipated is gigantic and concentrated very locally. In the when using connected metal plates by about three meters of cable to the power supply high voltage, the stored energy can exceed 1 mJ.
  • resistors of protection also for the safety of people and material (coating the electrodes may EDM), the risk of fire.
  • the location of these resistors must be done to break up the stored electrical energy. Above all, it is necessary reduce the energy stored in hazardous locations like the deflection space. There are commonly, the order of 20 ⁇ J stored in this space.
  • a first object of the present invention is to reduce the number of mechanical components and projection control system liquid.
  • a second object of the present invention is to remove discontinuities from the internal surfaces of the liquid spray control system.
  • a third object of the present invention is to reduce the path of the drops subjected to interactions between them in the control system of projection of liquid.
  • a fourth object of the present invention is integrate the electrical circuits necessary for liquid spray control system in a same component.
  • the continuous surface of the first element can also be covered with a resistive coating continued.
  • the first and second elements can also present ways to split the jet of liquid into drops and tilt the jet. These means make it possible to apply a field electric on the jet and may include means resistive and capacitive means.
  • the resistive means are advantageously constituted by part of the resistive coating which has, preferably discontinuities in certain portions in order to increase the efficiency of the jet fractionation.
  • the capacitive means may include said coating supported by an insulating layer, this insulating layer serving as a dielectric and being supported by conductive means supported by said insulating support.
  • the following description will relate to an ink spray control system for continuous jet print head.
  • the ink can be issued according to one or more jets which are split in drops.
  • the ink drops, charged electrically, are then deflected by a field electric to either lead to a circuit of ink recovery and recycling, either to a support on which the ink must be deposited.
  • ink 3 contained in a cavity 1 is emitted under pressure by a nozzle 2.
  • the ink jet 4, emitted by the nozzle 2 is projected into space 5 defined by the surfaces continuous presented by two elements 6 and 8, these surfaces facing each other.
  • Multiple jets ink, such as jet 4 can be emitted from several nozzles between these continuous surfaces, such as the shows figure 2.
  • Element 6 includes a flat insulating support 60, for example made of alumina, the face of which towards the space 5 supports conductive tracks 62 to 66 and a resistive coating 67.
  • the conductive tracks 62 to 66 electrically connect the resistive coating 67 to voltage generators, respectively 32 to 36, intended to supply control potentials, respectively U 2 to U 6 .
  • the other face of the support 60 can also support conductive tracks, for example 71, 72, 73, resistive coatings, for example the resistive coating 74, the dielectric coating 76 and electrical or electronic components, for example the component 75 ( see figure 2).
  • Electrical or electronic components deposited on the support 60 can be circuits integrated analog or logic, transistors diodes, capacitors, a transformer. They allow for voltage increases, current and voltage measurements, the generations of signals needed to split the inkjet (if applicable) and at the expense of the drops, generations of supply voltages.
  • the electrical connections between the two faces support 60 can be done by metallized holes, such as metallized hole 77.
  • metallized holes such as metallized hole 77.
  • the element 8, in the example described, comprises a continuous support 81, for example of alumina, or of another insulating material, covered with a continuous resistive coating 82.
  • a voltage generator 31 makes it possible to provide a potential U 1 to the continuous resistive coating 82.
  • the element 8 can also consist simply of metal or of another conductive material offering a continuous surface. The voltage generator 31 is then directly connected to the material of this element.
  • the ink jet 4 which enters the projection control system according to the invention, has an electric potential U jet which will be taken as the reference potential to simplify the explanations.
  • This ink jet can be provided beforehand with a kinematic disturbance depending on the time and leading to the separation of the jet into drops after a period of time, for example by means of a resonator included in the cavity 1. It can on the contrary be devoid kinematic disturbance when leaving the nozzle, in which case splitting into drops is carried out by the projection control system according to the invention.
  • the insulating support 60 supports, in its part located near the ink ejection nozzle, three electrodes 11, 12 and 13 arranged successively in the direction of the ink jet and covered with an insulating layer 15.
  • the tracks conductive 62 (see also Figure 1) are deposited on the insulating layer 15, so as to frame the electrodes 11 and 12.
  • the resistive coating 67 covers both the conductive tracks 62 and the insulating layer 15.
  • This resistive coating 67 has discontinuities (that is to say interruptions) on three small regularly spaced portions 16, corresponding to the upstream part (in the direction of advancement of the jet) of the conductive tracks 62, this to avoid propagation of the signal U 2 origin on the coating 67 against the jet.
  • the electrodes 11, 12 and 13 are brought to the potential U jet , the electrode 81 to the potential U 1 and the conductive tracks 62 to the potential U 2 .
  • the ink jet 4 undergoes two attractive forces coming from the potentials U 2 and U 1 . These two forces are in opposition. Their difference produces the inclination of the incident jet constantly and / or dynamically if the potential U 2 is variable. This provides the jet with a kinematic disturbance over time leading to the subsequent separation of the jet into drops.
  • the jet then progressing in the liquid projection control system has its inclination and its disturbance which are amplified.
  • the kinematic disturbance given by the fractionation signal reduces the diameter of the jet in certain places under the action of surface forces. This progresses until the cancellation of this diameter. It is the splitting of the jet, or the breaking. It is the moment of sampling of the electric charge of the drop formed according to the potentials U 3 , U 4 and U 1 associated with the distances between the liquid and these potentials. In the example described here, the potentials U 3 and U 4 are equal and represent the charge control signal. This gives a certain independence of the electric charge of the drop with respect to the place of fractionation.
  • the jet or the drops Since entering the system, the jet or the drops are constantly deflected by the action of forces from the surrounding potentials and the charges of the drops and the jet. The charged drops then evolve into a space where the deflection field remains large and becomes constant over time. We move away from the influence of the charge control provided by the potentials U 3 and U 4 .
  • the free space between the potentials of the resistive coating 67 and U 1 is defined increasing according to the needs of the printer to be defined. In practice, this prevents the drops from approaching the internal surfaces of the system in an unstable manner.
  • the definition of the potentials brought to the resistive coating 67 is predefined to guarantee an operation without electric shocks, and without risk for the cohesion of the drops.
  • the drops obtained by the fractionation signal have, at the output of the system according to the invention, trajectories controlled by the charge signal supplying the potentials U 3 , U 4 and by the tilt signal supplying the potential U 2 .
  • the different static potentials used in the ink spraying control system according to the invention are obtained by electrical circuits within the reach of those skilled in the art.
  • a chopping transistor defining a low voltage potential at the terminals of the primary of a step-up transformer and having several secondary. Diodes connected to the transformer secondary provide positive and negative rectified voltages of the same amplitude. This makes it possible to obtain the supply voltages of two amplifiers supplying the potentials U 2 , U 3 and U 4 .
  • the potential U 1 is obtained in an analogous manner.
  • the potentials U 5 and U 6 can be obtained using multiplier cells formed by diodes and capacitors and which make it possible to obtain multiples of the peak-to-peak voltage appearing at a secondary of the transformer.
  • a control device is provided, this device receiving the voltage measurements representing the result of the voltage behavior in the deflection X.
  • the measurements are used to modify either the low voltage supplying the 'together or the pace of the chopper, i.e. the information sent to obtain the potentials U 3 , U 4 or U 2 . This makes it possible to obtain the constancy of the deflection X with respect to the variations of the circuits for obtaining the electrical voltages.
  • a variable air thickness between the jet inlet and the out of the drops We use the increased field electric possible at short distance. This is good known and is illustrated by the Paschen curve defining the voltage giving an ionization not controllable, in a pressurized gas, between two conductive plates separated by a given distance. This, combined with the actual deflection of the drops loaded, provides the particular curvature of the surface to be generated. Reducing free space gives a substantial decrease in the amplitude of control voltages with increased deflection efficiency.
  • the present invention makes it possible to drop the voltages used at 2300 V compared to a classic design using 8000 V.
  • the value of a is given essentially by the ratio between the capacity between two drops in flight and Ce. Here the distance between the drop and the electrode is reduced. It rises and thus reduces. The development of the charge of the drops becomes less sensitive to this phenomenon.
  • an ink deposit causes the existence of a disturbing current which passes through it.
  • the diagram of the potentials U is compared with a set of electrodes 22, 23 and 24 carried respectively to potentials U 22 , U 23 and U 24 and separated by insulating parts 25 and 26.
  • the surface 27 of the part insulator 25 is easily polluted by parasitic electrical charges. If an ink deposit 28 occurs between the electrodes 23 and 24, a disturbing current i will flow in the ink deposit above the insulating part 26.
  • the potential diagram shown is obtained with corresponding potential variations to intense electric fields, in particular for the insulating part 25. The potentials and the currents are then modified and the measurements make it possible to alert the control member.
  • the system can decide to modify orders or to stop periodic closings of the chopper.
  • FIG. 5 takes up the principle of the invention: presence of an insulating support 60 supporting conductive tracks 62, 63 and 64 and a continuous resistive coating 67.
  • the conductive tracks 62, 63 and 64 are brought respectively to the potentials U 2 , U 3 and U 4 .
  • the presence of an ink deposit 18 between the conductive tracks 63 and 64 causes the circulation of a small disturbing current i between the tracks 63 and 64.
  • the resistive coating 67 makes it possible to define and reduce the electric field on the insulating. Thus, the potential drop between the electrodes is organized.
  • the associated potential diagram clearly shows that the surface electric field is weak between the conductive tracks.
  • the insulation is no longer accessible to the static field of free space, the charges flow on the surface, without taking the time to disturb the deflection of the liquid.
  • the resistive coating deposited on the support insulator 60, and possibly on electrode 81, can have a square resistance of 5 M ⁇ to 100 M ⁇ .
  • the ink used by inkjet printers contains a volatile liquid which creates condensation, especially on nearby surfaces inkjet.
  • partial voltages of the various gases, gradients of temperature, surfaces close to the inkjet will line with liquid, which causes conduction on the walls. We then notice a drift of the deflection of the drops.
  • this requires a value domain of the square resistance of the resistive coating.
  • the use of such a coating advantageously provides the potential for desired surface and local heating of this same area. So the surfaces close to the inkjet can be moderately heated using potential differences used to control the ink movement.
  • We can predict the square resistance allowing the detection of dysfunctions linked to the disturbance of quantities electric during spurious ink deposits. Then, we have the heat dissipation paths from resistive coating and components near electrics.
  • the method according to the invention employs a surface continuous common to the functions, from the entry of the jet to the out of the drops. This reduces and even suppress local elevations of the electric field due to the use of small radii of curvature. So we can follow the discharge limits more precisely restricting operation and increasing the efficiency of deflection. We can thus delete landfills of the second type regulated by the law of Langmuir exposed above.
  • the potentials of the functions fractionation, load, deflection are generated from continuously on a continuous surface to control the surface electric field of interface between functions.
  • the dimension along the axis of deflection begins at the entry of the jet with values of the order of several jet diameters. Field boundaries are increased by the smallness of the dimensions used.
  • the electric fields of the present invention are greater than 1.5 MV / m used in conventional printers. They can reach 6 MV / m. Limiting factors come from imbalance of the liquid surface by electrical pressure counteracting the surface pressure. For the same desired deflection result, the effective distance from the necessary liquid path can be reduced.
  • U 4 is the sampled control signal during the break. For a voltage U 4 of +100 V, the drop is negatively charged and takes a trajectory giving positive X. The drop runs along the upper surface limit. For a voltage U 4 of -350 V, the drop is positively charged and takes a trajectory giving X negative. The drop runs along the lower surface limit.
  • U 1 is the signal of order sampled during the break. For a voltage U 1 of +300 V, the drop is negatively charged, and takes a trajectory giving positive X. The drop runs along the upper surface limit. For a voltage U 1 of -50 V, the drop is positively charged and takes a trajectory giving X negative. The drop runs along the lower surface limit.
  • U 1 200 V
  • U 2 0,
  • U 3 -300 V
  • U 4 -350 V
  • U 5 -400 V
  • U 6 -1000 V.
  • U jet is the control signal sampled during breakage.
  • U jet of -50 V the drop is negatively charged and takes a trajectory giving positive X.
  • the drop runs along the upper surface limit.
  • U jet of +200 V the drop is positively charged and takes a trajectory giving X negative.
  • the drop runs along the lower surface limit.
  • the first control mode gives the preferred combination, adaptable to the multijet.
  • the jets and U 1 , U 2 , U 5 , U 6 potentials are common to the different jets.
  • the control voltage is comparatively higher excursion.
  • the second control mode gives the preferred combination, adaptable to the monojet if one wishes to keep the simplicity of the potential U 1 . It is possible to replace the equipotential U 1 with a second monolithic circuit. This produces before each break a specific charge voltage in the manner of the potentials U 3 , U 4 . On the rest of the surface, a constant potential is defined, framing the charge controls.
  • the third control mode gives a variant, adaptable to the monojet.
  • the drop charge control potential is that of the jet.
  • the control voltage is comparatively lower excursion.
  • the implementation is simple, the nozzle is at control potential.
  • the ink supply to the nozzle is carried out under an insulating tube. For example, if the length of the insulating tube is 0.5 m, its internal section is 2 mm 2 and if the resistivity of the ink is 8 ⁇ .m, the load resistance of the control is then equal 2 M ⁇ , which represents a slight disturbance for the charge control generator.
  • the potential U 2 makes it possible to modify, by its static value, the inclination of the incident jet or / and to dynamically deflect the jet and / or to propagate a disturbance in lieu of liquid separation information.
  • the principle of continuous jet deflection is realized. This makes it possible to deflect portions of liquid subsequently not electrically charged. In the method according to the invention, most of the deflection results from the force applied to the charged drop.
  • the static U 2 potential is used to adjust to compensate for jet alignment errors.
  • the means of producing the control electrode and the electrical behavior are particularly advantageous in the present invention.
  • the definition of resistive, conductive and insulating deposits defines a propagation of the potential U 2 (t) in the direction of advance of the jet.
  • the dynamic potential of the resistive deposit significantly close in amplitude and phase of U 2, is present over a variable extent according to the desired frequency of droplet formation.
  • cd is around 150 nF / m and that of rd is 2.5 G ⁇ / m.
  • a penetration range of 78 ⁇ m For a frequency of 100 kHz, we obtain a penetration range of 78 ⁇ m.
  • the entire resistive coating is at the static potential U 2 and makes it possible to obtain a significant static deflection to adjust the inclination of the jet.
  • the equivalent dynamic potential width of the electrode is that of the conductor at potential U 2 . This width is defined to obtain the maximum of the fractionation for the highest frequency for the formation of the drops, at least for the smallest distance between two consecutive future drops.
  • a first mode is similar to the process described in US-A-4,220,958. Its principle is to use a "pump electrode" adjacent to the column of fluid, connected to a source of electrical energy to establish an electric field. variable, developing a normal force on the fluid column, to cause the formation of drops at substantially constant spacing. As shown in FIG. 6, the length of an electrode for applying the potential U 2 (t) is approximately half a spacing between drops. The period of the voltage U 2 (t) is that of the formation of the drops.
  • the effective length of the electrode establishing a variable electric field for developing a normal force on the jet is also of the order of half a spacing between drops.
  • this effective length of the electrode is achieved by summing a fixed conductive electrode to which is added a diffuse length linked to the propagation of the variable signal U 2 on the resistive deposit coupled to the capacitive deposit.
  • the method according to the invention allows a certain adaptation of the effective length of the electrode establishing a variable electric field on the jet.
  • the variation of the effective length of the electrode as a function of the frequency of the signal U 2 (t) makes it possible to effectively stimulate over a larger frequency band.
  • a deflection of the jet is created by the action of the electric field emitted by the resistive electrode to stretch the jet in the inflection points of its trajectory.
  • the surface tension continues the flow of the liquid from these inflection points to then give the future breaks between drops.
  • the advantage of this control mode is to define dimensions of the electrode twice as large in the direction of advancement of the jet. If the design proposed in US-A-4 220 958 was half a drop spacing for its electrode, the present mode of attack of the jet requires a drop spacing. As shown in Figure 7, the period of the voltage U 2 (t) is then double that of the formation of the drops. Under the reference 50, the inflection points of the trajectory of the ink jet have been shown.
  • the lithography technique used for the production of conductive and resistive electrodes to then be coarser. This provides an advantage since the width dimension of the conductive track must be smaller than the spacing between drops. You can choose a half-spacing between drops for the width of the conductive track, the resistive track taking over to transmit the potential U 2 .
  • the spacing between drops is then 250 ⁇ m.
  • the width dimension of the track is then of 125 ⁇ m. This value is easily obtained by conductive ink deposition screen printing techniques thick layer type of the electronics industry.

Landscapes

  • Particle Formation And Scattering Control In Inkjet Printers (AREA)
  • Cathode-Ray Tubes And Fluorescent Screens For Display (AREA)
EP98928414A 1997-06-03 1998-06-02 Systeme de commande de projection de liquide electriquement conducteur Expired - Lifetime EP1007363B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
FR9706799A FR2763870B1 (fr) 1997-06-03 1997-06-03 Systeme de commande de projection de liquide electriquement conducteur
FR9706799 1997-06-03
PCT/FR1998/001107 WO1998055315A1 (fr) 1997-06-03 1998-06-02 Systeme de commande de projection de liquide electriquement conducteur

Publications (2)

Publication Number Publication Date
EP1007363A1 EP1007363A1 (fr) 2000-06-14
EP1007363B1 true EP1007363B1 (fr) 2002-09-18

Family

ID=9507522

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98928414A Expired - Lifetime EP1007363B1 (fr) 1997-06-03 1998-06-02 Systeme de commande de projection de liquide electriquement conducteur

Country Status (10)

Country Link
US (1) US6511164B1 (zh)
EP (1) EP1007363B1 (zh)
JP (1) JP2002502332A (zh)
CN (1) CN1095752C (zh)
AU (1) AU741223B2 (zh)
CA (1) CA2292641A1 (zh)
DE (1) DE69808104T2 (zh)
ES (1) ES2184279T3 (zh)
FR (1) FR2763870B1 (zh)
WO (1) WO1998055315A1 (zh)

Families Citing this family (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2821291B1 (fr) 2001-02-27 2003-04-25 Imaje Sa Tete d'impression et imprimante a electrodes de deflexion ameliorees
US7252372B2 (en) * 2004-03-08 2007-08-07 Fujifilm Corporation Liquid ejection apparatus and ejection control method
WO2005087495A1 (en) * 2004-03-17 2005-09-22 Kodak Graphic Communications Canada Company Method and apparatus for controlling charging of droplets
US7163281B2 (en) * 2004-05-05 2007-01-16 Eastman Kodak Company Method for improving drop charging assembly flatness to improved drop charge uniformity in planar electrode structures
JP4654706B2 (ja) * 2005-02-16 2011-03-23 セイコーエプソン株式会社 液体噴射装置
US7249829B2 (en) * 2005-05-17 2007-07-31 Eastman Kodak Company High speed, high quality liquid pattern deposition apparatus
JP4604953B2 (ja) * 2005-10-13 2011-01-05 セイコーエプソン株式会社 静電アクチュエータ、それを備えた液滴吐出ヘッド、液滴吐出装置及びデバイス並びに液滴吐出ヘッドの駆動方法
US7988247B2 (en) * 2007-01-11 2011-08-02 Fujifilm Dimatix, Inc. Ejection of drops having variable drop size from an ink jet printer
US8540351B1 (en) * 2012-03-05 2013-09-24 Milliken & Company Deflection plate for liquid jet printer
US9452602B2 (en) * 2012-05-25 2016-09-27 Milliken & Company Resistor protected deflection plates for liquid jet printer
ITMO20130269A1 (it) * 2013-09-27 2015-03-28 Smartjet S R L Unità ad elettrodi di controllo di fase e deflessione
EP3099490B1 (en) * 2014-01-27 2020-08-12 HP Indigo B.V. Valve
US10926470B2 (en) 2016-10-17 2021-02-23 Wacker Chemie Ag Method for producing silicone elastomer articles with elevated print quality
CN107685539B (zh) * 2017-09-22 2019-04-23 京东方科技集团股份有限公司 喷墨打印喷头、喷墨量测量系统和方法及喷墨量控制方法
CN107745580B (zh) * 2017-11-02 2023-04-07 北京赛腾标识系统股份公司 偏转电极及喷码机喷头
CN109808310B (zh) * 2019-03-07 2020-11-06 浙江鸣春纺织股份有限公司 一种喷码机连续喷墨打印装置

Family Cites Families (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4138686A (en) * 1977-04-06 1979-02-06 Graf Ronald E Electrostatic neutral ink printer
US4122458A (en) * 1977-08-19 1978-10-24 The Mead Corporation Ink jet printer having plural parallel deflection fields
US4220958A (en) 1978-12-21 1980-09-02 Xerox Corporation Ink jet electrohydrodynamic exciter
JPS5931167A (ja) * 1982-08-13 1984-02-20 Hitachi Ltd インクジエツトプリンタ
US4560991A (en) * 1983-07-27 1985-12-24 Eastman Kodak Company Electroformed charge electrode structure for ink jet printers
DE3481833D1 (de) * 1984-02-27 1990-05-10 Codi Jet Markierungs Systeme G Tintenstrahldrucker.
US4658269A (en) 1986-06-02 1987-04-14 Xerox Corporation Ink jet printer with integral electrohydrodynamic electrodes and nozzle plate
DE3787807T2 (de) * 1986-08-28 1994-02-10 Commw Scient Ind Res Org Methode und apparat zum drucken durch ablenkung eines flüssigkeitsstroms.
WO1988006525A1 (en) 1987-03-02 1988-09-07 Commonwealth Scientific And Industrial Research Or Stream deflection jet body for liquid jet printers
US4845512A (en) 1988-10-12 1989-07-04 Videojet Systems International, Inc. Drop deflection device and method for drop marking systems
US4928113A (en) * 1988-10-31 1990-05-22 Eastman Kodak Company Constructions and fabrication methods for drop charge/deflection in continuous ink jet printer
GB2249995B (en) * 1990-11-21 1995-03-01 Linx Printing Tech Electrostatic deflection of charged particles
FR2681010B1 (fr) * 1991-09-10 1995-02-17 Imaje Module d'impression multijet et appareil d'impression comportant plusieurs modules.
CA2145385A1 (en) * 1992-10-13 1994-04-28 George Arway Method and system for drop marking and a drop deflector for use therewith
US5363124A (en) 1993-01-26 1994-11-08 Videojet Systems International, Inc. Printhead for ink jet printers
DE69609248T2 (de) * 1995-05-26 2001-03-08 Scitex Digital Printing, Inc. Verfahren zur Herstellung von Ladungselektroden

Also Published As

Publication number Publication date
CA2292641A1 (en) 1998-12-10
FR2763870A1 (fr) 1998-12-04
FR2763870B1 (fr) 1999-08-20
ES2184279T3 (es) 2003-04-01
AU741223B2 (en) 2001-11-29
WO1998055315A1 (fr) 1998-12-10
AU8024898A (en) 1998-12-21
US6511164B1 (en) 2003-01-28
DE69808104D1 (de) 2002-10-24
EP1007363A1 (fr) 2000-06-14
DE69808104T2 (de) 2003-05-15
CN1265624A (zh) 2000-09-06
CN1095752C (zh) 2002-12-11
JP2002502332A (ja) 2002-01-22

Similar Documents

Publication Publication Date Title
EP1007363B1 (fr) Systeme de commande de projection de liquide electriquement conducteur
FR2906755A1 (fr) Impression par deflexion d'un jet d'encre par un champ variable.
EP0051006B1 (fr) Procédé et dispositifs pour transférer des charges électriques de signes différents dans une zone d'espace et application aux éliminateurs d'électricité statique
EP0281438B1 (fr) Dispositif de projection électrostatique de produit en poudre
FR2692501A1 (fr) Dispositif de projection électrostatique de produit de revêtement liquide à tête de pulvérisation rotative.
FR2892052A1 (fr) Impression par deflexion differentielle de jet d'encre
FR2732907A1 (fr) Dispositif rotatif electrostatique de pulverisation par atomisation
EP0192000A1 (fr) Paratonnerre à décharge couronne impulsionnelle intermittente
EP2988877B1 (fr) Projecteur electrostatique de produit de revetement liquide et installation de projection comprenant un tel projecteur
FR2952851A1 (fr) Imprimante a jet d'encre continu a qualite et autonomie d'impression ameliorees
FR2821291A1 (fr) Tete d'impression et imprimante a electrodes de deflexion ameliorees
EP1767894B1 (fr) Dispositif embarqué de génération de décharges plasma pour le pilotage d'un engin supersonique ou hypersonique
EP0733407A1 (fr) Dispositif de projection électrostatique de produit de revêtement
FR2598636A1 (fr) Atomiseur rotatif pour la projection de peintures liquides et analogues
FR2552277A1 (fr) Perfectionnements dans la construction des paratonnerres
EP1987530B1 (fr) Installation et procede de nano -fabrication
FR3088242A1 (fr) Procede et dispositif de formation de gouttes a l'aide d'une cavite a facteur de qualite degrade
JPH078848A (ja) 静電霧化型塗布装置
WO2002043216A1 (fr) Paratonnerre a dispositif d'amorcage et procede de commande du courant d'effluve d'un tel paratonnerre
EP0124465A1 (fr) Dispositif de contrÔle de charge, et son application au contrÔle de la vitesse des gouttes d'encre d'une imprimante à jet d'encre.
EP1624991B1 (fr) Dispositif d'usinage par electroerosion
EP0888520A1 (fr) Procede et dispositif pour mesurer un ecart axial dans un systeme d'alignement a fil tendu
FR3138808A1 (fr) Dispositif de réduction de la charge électrique d’un véhicule spatial
FR2578293A1 (fr) Moteur a reaction avec compensation du potentiel electrostatique, et procede de compensation correspondant
EP4364541A1 (fr) Element piezoelectrique pour nebulisateur, avec une duree de vie amelioree

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

17P Request for examination filed

Effective date: 19991122

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): DE ES GB IT NL SE

17Q First examination report despatched

Effective date: 20010418

GRAG Despatch of communication of intention to grant

Free format text: ORIGINAL CODE: EPIDOS AGRA

GRAG Despatch of communication of intention to grant

Free format text: ORIGINAL CODE: EPIDOS AGRA

GRAH Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOS IGRA

GRAH Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOS IGRA

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): DE ES GB IT NL SE

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: NL

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20020918

REG Reference to a national code

Ref country code: GB

Ref legal event code: FG4D

Free format text: NOT ENGLISH

REF Corresponds to:

Ref document number: 69808104

Country of ref document: DE

Date of ref document: 20021024

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SE

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20021218

GBT Gb: translation of ep patent filed (gb section 77(6)(a)/1977)

Effective date: 20021205

NLV1 Nl: lapsed or annulled due to failure to fulfill the requirements of art. 29p and 29m of the patents act
REG Reference to a national code

Ref country code: ES

Ref legal event code: FG2A

Ref document number: 2184279

Country of ref document: ES

Kind code of ref document: T3

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: ES

Payment date: 20030522

Year of fee payment: 6

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 20030627

Year of fee payment: 6

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed

Effective date: 20030619

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 20040602

Year of fee payment: 7

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: ES

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20040603

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20050101

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES;WARNING: LAPSES OF ITALIAN PATENTS WITH EFFECTIVE DATE BEFORE 2007 MAY HAVE OCCURRED AT ANY TIME BEFORE 2007. THE CORRECT EFFECTIVE DATE MAY BE DIFFERENT FROM THE ONE RECORDED.

Effective date: 20050602

Ref country code: GB

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20050602

REG Reference to a national code

Ref country code: ES

Ref legal event code: FD2A

Effective date: 20040603

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 20050602