US3656171A - Apparatus and method for sorting particles and jet prop recording - Google Patents

Apparatus and method for sorting particles and jet prop recording Download PDF

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Publication number
US3656171A
US3656171A US96083A US3656171DA US3656171A US 3656171 A US3656171 A US 3656171A US 96083 A US96083 A US 96083A US 3656171D A US3656171D A US 3656171DA US 3656171 A US3656171 A US 3656171A
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United States
Prior art keywords
particles
drops
marking
drop
fluid
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Expired - Lifetime
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US96083A
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English (en)
Inventor
John A Robertson
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Eastman Kodak Co
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Mead Corp
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Assigned to EASTMAN KODAK COMPANY A NJ CORP. reassignment EASTMAN KODAK COMPANY A NJ CORP. ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: MEAD CORPORATION THE A CORP. OF OH
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Expired - Lifetime legal-status Critical Current

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    • 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
    • B41J2/105—Ink jet characterised by jet control for binary-valued deflection
    • 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
    • B41J2/17—Ink jet characterised by ink handling
    • B41J2/18—Ink recirculation systems
    • B41J2/185—Ink-collectors; Ink-catchers

Definitions

  • Each charged particle in progression past the conductive surface induces thereon a sheet of electri-v cal charge and this sheet in turn causes lateral displacement of the inducing particle.
  • jet drop recording apparatus employing sheets of self-induced electrical charge for sorting fluid marking drops into print and no-print trajectories.
  • Another disadvantage of the prior art which is present in multiple channel configurations is that of crosstalk between channels.
  • a sorting device having two channels each of which operates in a maximum-charge/zerocharge binary mode. If a particle in one channel is supposed to be uncharged but actually receives say percent of a maximum charge because of crosstalk from the adjacent channel, then the spuriously charged particle will be deflected 10 percent of the full scale catch deflection. This is an error which could not be tolerated in a precision recording process.
  • This invention overcomes the disadvantages of the prior art by eliminating the steady state deflection field and accomplishing particle deflection by a self-induced deflection field.
  • Each charged particle sets up its own deflection field and is enabled to do so by an electrically conductive surface placed near the particle path.
  • an electrically conductive surface placed near the particle path.
  • This sheet of induced charge is opposite in sign to that of the inducing charge and has an associated electrical field which attracts the charged particle toward the conductive surface.
  • the self-induced electrical field have a net resultant lateral component along the base non-perturbed particle path.
  • FIG. 1 is a schematic representation of a single channel particle sorting apparatus which charges liquid particles on a binary basis and employs self-induced electrical fields to segregate charged particles from uncharged particles.
  • FIG. 2 is a diagrammatic illustration of the distribution of actual and image charges induced in a conductive wall due to the presence of a nearby charged particle.
  • FIG. 3 is a schematic illustration of a typical prior art fluid drop recording apparatus.
  • FIG. 4 is a schematic representation, partially in section, of a printing head using a common conductive surface for self-induced deflection of a linear array of charged drops.
  • FIG. 5 is a schematic representation of a particle sorting apparatus employing self-induced deflection for fluid particles generated in a circular array.
  • FIG. 1 The preferred embodiment of the present invention is shown schematically in FIG. 1 wherein a conductive fluid 1 flows through an orifice 2 in an electrically conductive plate 3 forming a filament 4 and thereafter breaks up into drops 5, 5a; some of which 5a are caught by catcher 6.
  • the fluid is forced through orifice 2 under pressure and is stimulated to break up into uniformly sized and regularly spaced drops by a constant frequency oscillating transducer (not shown) in communication with the orifice assembly or fluid supply.
  • An electrically conductive charge strip 7 is positioned adjacent filament 4 and is connected to one side of a source of electric potential 8. The other side of source 8 is connected to plate 3 for control of the potential of filament 4.
  • source 8 may communicate directly with fluid 1.
  • source 8 produces a potential difference between strip 7 and filament 4 in response to a control signal applied to input terminals 9.
  • this potential difference causes electrical charges to appear on filament 4, and some of this charge is carried away by the drops when they separate.
  • Drops 5a carry such a charge and follow a curved trajectory 10 as shown.
  • Drops 5 are uncharged due to a zero magnitude signal having been present at input terminals 9 at the respective instants when those drops separated from filament 4. Drops 5 follow a straight trajectory 1l.
  • Drops 5a are deflected to follow trajectory 10 by self-induced attraction to conductive deflection strip 12. Normally strip 12 will be grounded and mounted on an insulated wall 13. A vacuum source (not shown) is connected to porous plate 14 and draws off drops 5a as they are caught by catcher 6.
  • the attractive force operating on any drop 5a is inversely proportional to the square of the distance between the drop and strip 12. Therefore, it is desirable to position strip 12 very close to filament 4. At the same time, however, it is desirable that trajectory l0 curve back far enough to guarantee a clean catch for drops 5a. This means that the lower portion of strip 12 ought to be positioned relatively far away from trajectory 11. These somewhat conflicting requirements can both be satisfied by angling or tilting strip 12 back away from the drop stream as illustrated in FIG. 1. Typically, the tilt angle may be about 2.5".
  • this tilt angle Associated with this tilt angle would be a drop mass of about 6.2 X 10 kg., a drop diameter of about 23 microns, a drop velocity of about 9 meters per sec, a deflection strip length of about 1.25 mm, and a total distance of about 2.5 mm from the orifice plate to the catcher.
  • the distance between filament 4 and charge strip 7 would be about 25 microns and the potential difference about 200 volts. This in turn will produce a drop charge of about 10' coul. and a drop deflection of about 56 microns or about 2.5 drop diameters.
  • the operation of the deflection strip is best understood by reference to FIG. 2 wherein a charged drop 15 is falling past a conductive wall 16.
  • Drop 15 is assumed to carry a negative charge which distributes itself about the drop surface as at 17. In general the negative charge distribution will be somewhat more dense on the side of the drop facing wall 16.
  • This invention depends for its operation upon the force exerted against drop 15 by the induced field of charges 18.
  • This force can be calculated by assuming charges 17 to be concentrated at a point within drop 15 and summing the incremental forces exerted against this concentrated charge by the distributed charges on each elemental area of the surface of wall 16.
  • this distribution cannot be solved without knowledge of the distribution of charges 18.
  • distributed charges 18 may be replaced (for mathematical purposes) by image charges 21 arranged around the surface of an image drop 20. See for instance a discussion on the theory of images in the book Electromagnetic Theory by J. A. Stratton, McGraw-Hill Book Company, Inc., 1941 at Sec. 3.18. Making this replacement and applying Coulombs law to the resulting charge configuration, one finds the force on drop 15 to be given approximately by the equation:
  • FIG. 3 The operation of this invention is to be contrasted to the operation of a prior art system as illustrated in FIG. 3.
  • a supply of conductive fluid 22 is forced under pressure through a nozzle 23 to form a filament 24.
  • Vibrator 25 stimulates filament 24 to break up into uniform regularly spaced drops 26 ,26a which are either caught by catcher 27 or deposited on receiving member 28. Drops 26 are uncharged while drops 26a are charged due to an appropriately timed potential difference applied between charge tunnel 29 and filament 24.
  • the required potential difference is produced by source 30 under control of a signal applied at terminals 31.
  • the force which the illustrated prior art system requires to sort charged drops 26a from uncharged drops 26 is provided by a pair of deflection plates 32.
  • Fixed potential source 33 is connected to create a potential difference between plates 32 and this in turn produces a force exerting electric deflection field.
  • each charged drop 26a will see an oppositely charged image drop in each plate 32 which may or may not provide a non-negligible self-induced deflecting force, depending upon the distance from the drop to the plate.
  • Such a force would be in addition to the force exerted by the steady state deflection field.
  • any such self-induced deflection force is balanced out, at least initially, by a similar force attracting the drop to the other plate.
  • a printing head 34 embodying the present invention is illustrated in schematic cut-away form in FIG. 4.
  • This embodiment has a row of orifices 43 in an orifice plate 35 bonded to the under side of an ink supply manifold 36. Bonded to the lower side of the orifice plate are insulative support blocks 37 and 38.
  • a catching blade 40 is bonded to a porous plate 39, and the porous plate in turn is bonded to support block 37.
  • a series of charge strips 41 are arranged to charge the ink filaments which issue from orifices 43, and a common conductive deflection plate 42 enables self-induced deflection of all charged drops.
  • FIG. 4 is not to scale as the distance from each orifice 43 to its associated charge strip 41 is in actuality much less than the distance between adjacent orifices.
  • the orifice-to-orifice distance may be about 0.1 mm while the orifice-to-charge strip distance may be about 0.025 mm.
  • Associated with these dimensions may be an orifice diameter of about 0.013 mm and a charge strip width of about 0.05 mm.
  • Other system parameters may be as mentioned above in the discussion for the single channel illustrated in FIG. 1.
  • Deflection plate 42 and charge strips 41 may be easily fabricated by well known printed circuit techniques.
  • Head 34 may be used in combination with three similar heads to provide solid printing coverage.
  • the heads are arranged in a staggered fashion and time coordinated in the manner described in pending US. Pat. application Ser. No. 768,790, now US. Pat. No. 3,560,641.
  • Such an arrangement will provide a highly precise printing capability with the orifices located only about a quarter centimeter away from the paper.
  • the system as above described with reference to FIGS. 1 and 3 achieves an initial lateral drop acceleration of about 5,600 meters per sec. which is sufficient to displace the drops a distance of about 2.5 diameters (56 microns) during a vertical fall of only 1.25 mm.
  • the electrically conductive deflection surface may be vertically extended to a length of about 5 mm or so. In such a case the same 2.5 diameter drop deflection may be achieved with a lateral acceleration of only about 350 meters per sec. This reduction in the acceleration requirement enables reduction of the self-induced deflecting force by a factor of 16 and a 75 percent reduction of charging potential from 200 volts to 50 volts.
  • FIG. 5 An alternative embodiment of this invention is shown in FIG. 5 wherein a group of orifices 45 are circularly arranged in an orifice plate 44 and discharge a set of fluid filaments 46 through a conductive cylindrical tunnel 47.
  • Tunnel 47 is electrically insulated from plate 44 and a source of pulsed electrical potential (not shown) is connected therebetween.
  • a source of pulsed electrical potential (not shown) is connected therebetween.
  • each drop 48 sees an electrically conductive surface which is laterally non-symmetrical with respect to its initial trajectory. Accordingly each drop 48 is accelerated laterally outward toward the inner wall of tunnel 47, but it leaves the end of the tunnel before hitting the tunnel wall. Drops 48 maintain the lateral velocity which they achieve before leaving tunnel 47 and this lateral velocity carries them outward beyond upstanding lip 50 on base plate 49. Having thus been caught, they may be drawn off by a suitable source of vacuum.
  • a particle sorting apparatus comprising means for producing a progression of uniformly sized and regularly spaced particles, means for coding the progression of particles by selective impressment of a predetermined electrical charge on only some of said particles, and means for switching the charged particles into a diverted trajectory; the improvement wherein said last named means comprises electrically conductive surface means of laterally non-symmetrical configuration with respect to the initial trajectory of said particles.
  • said electrically conductive surface means being configured and positioned to carry in response to an electrical charge impressed on a particle as aforesaid a sheet of induced electrical charge of sufficient magnitude to attract said particle away from its initial trajectory with a lateral acceleration of at least 350 meters per sec. per sec.
  • Recording apparatus comprising particle sorting means and means to produce a visual record of particles sorted by said sorting means; said sorting means comprising:
  • an electrically conductive surface positioned near the path of said progression and configured to enable nearby charged particles to induce thereon sheets of electrical surface charge of distribution and strength for displacing the inducing particles into laterally sorted trajectories.
  • Fluid drop marking apparatus comprising:
  • Apparatus according to claim 6 said means for generating a stream of uniformly sized and regularly spaced fluid marking drops comprising:
  • Apparatus according to claim 7 said electrically conductive surface extending upwardly into the region where said fluid filament breaks up into drops, and said means for creatingan electrical field comprising means for establishing an electric potential difference between the conductive surface and the fluid filament.
  • said electrically conductive surface being a surface of revolution with its axis parallel to the path of said stream and offset therefrom.
  • Apparatus according to claim 7 said deflection surface being at the same electric potential as the fluid filament and said means for creating an electrical field comprising:
  • d. means responsive to an input marking control signal for selective impressment of a predetermined electrical charge on some of said drops; all other drops being uncharged,
  • g. means to produce a visible trace of the non-deflected drops.
  • Fluid drop marking apparatus said means for producing a laterally deflecting self-induced electrical field for each charged drop comprising a common electrically conductive surface positioned near all of said streams and configured whereby the sheets of electrical charge induced thereon in response to the charges on nearby drops each produce a resultant lateral electrical field in the region of the sheet inducing drop.
  • Fluid drop marking apparatus according to claim 13 said nozzles being arranged along a straight line.
  • Fluid drop marking apparatus according to claim 14 the induced sheets of electrical charge each being of sufficient magnitude to attract the inducing particle away from its initial trajectory with a lateral acceleration in the order of about 5,600 meters per sec. per sec.
  • Method according to claim 17 said step of producing a progression of uniformly sized and regularly spaced particles of marking material comprising the further steps of:
  • Method according to claim 18 said step of applying an electrical charge to said particles comprising the step of establishing an electric field of predetermined strength in the region of the tip of said filament when the control signal is at its first mentioned level.

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  • Particle Formation And Scattering Control In Inkjet Printers (AREA)
  • Electrostatic Separation (AREA)
US96083A 1970-12-08 1970-12-08 Apparatus and method for sorting particles and jet prop recording Expired - Lifetime US3656171A (en)

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US9608370A 1970-12-08 1970-12-08

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JP (1) JPS5148859B1 (xx)
AU (1) AU472244B2 (xx)
BE (1) BE776364A (xx)
CA (1) CA940192A (xx)
CH (1) CH561084A5 (xx)
FR (1) FR2117923B1 (xx)
IT (1) IT940399B (xx)
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Cited By (44)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3709432A (en) * 1971-05-19 1973-01-09 Mead Corp Method and apparatus for aerodynamic switching
US3776461A (en) * 1971-10-04 1973-12-04 Casio Computer Co Ltd Nozzle device for ink jet printing equipments
US3871004A (en) * 1974-06-26 1975-03-11 Olympia Werke Ag Ink drop writing head
US3905550A (en) * 1974-06-06 1975-09-16 Sota Inc De Avoidance of spattering in the supply of conductive liquids to charged reservoirs
US3941312A (en) * 1973-11-23 1976-03-02 Research and Development Laboratories of Ohno Company Limited Ink jet nozzle for use in a recording unit
US3958959A (en) * 1972-11-02 1976-05-25 Trw Inc. Method of removing particles and fluids from a gas stream by charged droplets
US4068241A (en) * 1975-12-08 1978-01-10 Hitachi, Ltd. Ink-jet recording device with alternate small and large drops
DE2756805A1 (de) * 1976-12-22 1978-07-06 Mead Corp Schaltungsanordnung fuer einen tintenstrahldrucker
DE2850116A1 (de) * 1977-11-21 1979-06-07 Exxon Research Engineering Co Elektrostatische aufladungs- und zerstaeubungsvorrichtung und verfahren zur elektrostatischen aufladung eines nicht leitenden mediums
US4223321A (en) * 1979-04-30 1980-09-16 The Mead Corporation Planar-faced electrode for ink jet printer and method of manufacture
USRE30479E (en) * 1978-05-17 1981-01-13 Trw Inc. Method of removing particles and fluids from a gas stream by charged droplets
US4250510A (en) * 1979-09-04 1981-02-10 The Mead Corporation Fluid jet device
US4291340A (en) * 1979-09-12 1981-09-22 The Mead Corporation Jet drop copier with multiplex ability
US4324117A (en) * 1980-06-11 1982-04-13 The Mead Corporation Jet device for application of liquid dye to a fabric web
US4347935A (en) * 1979-05-16 1982-09-07 The United States Of America As Represented By The United States Department Of Energy Method and apparatus for electrostatically sorting biological cells
US4350986A (en) * 1975-12-08 1982-09-21 Hitachi, Ltd. Ink jet printer
US4368475A (en) * 1979-09-12 1983-01-11 The Mead Corporation Jet drop copier
US4419674A (en) * 1982-02-12 1983-12-06 Mead Corporation Wire wound flat-faced charge plate
US4523202A (en) * 1981-02-04 1985-06-11 Burlington Industries, Inc. Random droplet liquid jet apparatus and process
US4550323A (en) * 1982-06-30 1985-10-29 Burlington Industries, Inc. Elongated fluid jet printing apparatus
US4560991A (en) * 1983-07-27 1985-12-24 Eastman Kodak Company Electroformed charge electrode structure for ink jet printers
EP0196074A2 (en) * 1981-02-04 1986-10-01 Burlington Industries, Inc. Random droplet liquid jet apparatus and process
US4621268A (en) * 1984-02-08 1986-11-04 Keeling Michael R Fluid application method and apparatus
US4629119A (en) * 1984-01-26 1986-12-16 Nordson Corporation Electrostatic isolation apparatus and method
US4636808A (en) * 1985-09-09 1987-01-13 Eastman Kodak Company Continuous ink jet printer
US4644369A (en) * 1981-02-04 1987-02-17 Burlington Industries, Inc. Random artificially perturbed liquid jet applicator apparatus and method
US4698642A (en) * 1982-09-28 1987-10-06 Burlington Industries, Inc. Non-artifically perturbed (NAP) liquid jet printing
US4854506A (en) * 1984-12-20 1989-08-08 Imperial Chemical Industries Plc Electrostatic spraying
US5021803A (en) * 1985-01-18 1991-06-04 Imperial Chemical Industries Plc Ink jet parallel cusp producing slot or edge configured nozzle system
US5086973A (en) * 1990-04-11 1992-02-11 Terronics Development Corp. Nozzle modulators
US5332154A (en) * 1992-02-28 1994-07-26 Lundy And Associates Shoot-up electrostatic nozzle and method
US20060197803A1 (en) * 2005-03-07 2006-09-07 Steiner Thomas W Apparatus and method for electrostatically charging fluid drops
WO2012162354A1 (en) 2011-05-25 2012-11-29 Eastman Kodak Company Liquid ejection using drop charge and mass
WO2012162082A1 (en) 2011-05-25 2012-11-29 Eastman Kodak Company Liquid ejection system including drop velocity modulation
CN103302971A (zh) * 2012-03-12 2013-09-18 张爱明 一种连续喷墨的喷头
WO2013142451A1 (en) 2012-03-20 2013-09-26 Eastman Kodak Company Drop placement error reduction in electrostatic printer
WO2013142233A1 (en) 2012-03-20 2013-09-26 Eastman Kodak Company Drop placement error reduction in electrostatic printer
US8585189B1 (en) 2012-06-22 2013-11-19 Eastman Kodak Company Controlling drop charge using drop merging during printing
WO2013191959A1 (en) 2012-06-22 2013-12-27 Eastman Kodak Company Variable drop volume continuous liquid jet printing
US8646882B2 (en) 2012-03-20 2014-02-11 Eastman Kodak Company Drop placement error reduction in electrostatic printer
US8651633B2 (en) 2012-03-20 2014-02-18 Eastman Kodak Company Drop placement error reduction in electrostatic printer
US8696094B2 (en) 2012-07-09 2014-04-15 Eastman Kodak Company Printing with merged drops using electrostatic deflection
US20140168322A1 (en) * 2011-05-27 2014-06-19 Markem-Imaje Binary continuous ink jet printer
US10336077B2 (en) 2015-12-22 2019-07-02 Dover Europe Sàrl Print head or ink jet printer with reduced solvent consumption

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US3380584A (en) * 1965-06-04 1968-04-30 Atomic Energy Commission Usa Particle separator
US3416153A (en) * 1965-10-08 1968-12-10 Hertz Ink jet recorder
US3596275A (en) * 1964-03-25 1971-07-27 Richard G Sweet Fluid droplet recorder

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Publication number Priority date Publication date Assignee Title
US3596275A (en) * 1964-03-25 1971-07-27 Richard G Sweet Fluid droplet recorder
US3380584A (en) * 1965-06-04 1968-04-30 Atomic Energy Commission Usa Particle separator
US3416153A (en) * 1965-10-08 1968-12-10 Hertz Ink jet recorder

Cited By (55)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3709432A (en) * 1971-05-19 1973-01-09 Mead Corp Method and apparatus for aerodynamic switching
US3776461A (en) * 1971-10-04 1973-12-04 Casio Computer Co Ltd Nozzle device for ink jet printing equipments
US3958959A (en) * 1972-11-02 1976-05-25 Trw Inc. Method of removing particles and fluids from a gas stream by charged droplets
US3941312A (en) * 1973-11-23 1976-03-02 Research and Development Laboratories of Ohno Company Limited Ink jet nozzle for use in a recording unit
US3905550A (en) * 1974-06-06 1975-09-16 Sota Inc De Avoidance of spattering in the supply of conductive liquids to charged reservoirs
US3871004A (en) * 1974-06-26 1975-03-11 Olympia Werke Ag Ink drop writing head
US4068241A (en) * 1975-12-08 1978-01-10 Hitachi, Ltd. Ink-jet recording device with alternate small and large drops
US4350986A (en) * 1975-12-08 1982-09-21 Hitachi, Ltd. Ink jet printer
DE2756805A1 (de) * 1976-12-22 1978-07-06 Mead Corp Schaltungsanordnung fuer einen tintenstrahldrucker
FR2375048A1 (fr) * 1976-12-22 1978-07-21 Mead Corp Circuit d'application d'un potentiel compense pour imprimante a jets d'encre
DE2850116A1 (de) * 1977-11-21 1979-06-07 Exxon Research Engineering Co Elektrostatische aufladungs- und zerstaeubungsvorrichtung und verfahren zur elektrostatischen aufladung eines nicht leitenden mediums
US4255777A (en) * 1977-11-21 1981-03-10 Exxon Research & Engineering Co. Electrostatic atomizing device
USRE30479E (en) * 1978-05-17 1981-01-13 Trw Inc. Method of removing particles and fluids from a gas stream by charged droplets
US4223321A (en) * 1979-04-30 1980-09-16 The Mead Corporation Planar-faced electrode for ink jet printer and method of manufacture
US4347935A (en) * 1979-05-16 1982-09-07 The United States Of America As Represented By The United States Department Of Energy Method and apparatus for electrostatically sorting biological cells
EP0024955A1 (en) * 1979-09-04 1981-03-11 The Mead Corporation Fluid jet devices and method of depositing fluid drops
US4250510A (en) * 1979-09-04 1981-02-10 The Mead Corporation Fluid jet device
US4368475A (en) * 1979-09-12 1983-01-11 The Mead Corporation Jet drop copier
US4291340A (en) * 1979-09-12 1981-09-22 The Mead Corporation Jet drop copier with multiplex ability
US4324117A (en) * 1980-06-11 1982-04-13 The Mead Corporation Jet device for application of liquid dye to a fabric web
EP0196074A3 (en) * 1981-02-04 1987-04-08 Burlington Industries, Inc. Random droplet liquid jet apparatus and process
US4523202A (en) * 1981-02-04 1985-06-11 Burlington Industries, Inc. Random droplet liquid jet apparatus and process
EP0196074A2 (en) * 1981-02-04 1986-10-01 Burlington Industries, Inc. Random droplet liquid jet apparatus and process
US4644369A (en) * 1981-02-04 1987-02-17 Burlington Industries, Inc. Random artificially perturbed liquid jet applicator apparatus and method
US4419674A (en) * 1982-02-12 1983-12-06 Mead Corporation Wire wound flat-faced charge plate
US4550323A (en) * 1982-06-30 1985-10-29 Burlington Industries, Inc. Elongated fluid jet printing apparatus
US4698642A (en) * 1982-09-28 1987-10-06 Burlington Industries, Inc. Non-artifically perturbed (NAP) liquid jet printing
US4560991A (en) * 1983-07-27 1985-12-24 Eastman Kodak Company Electroformed charge electrode structure for ink jet printers
US4629119A (en) * 1984-01-26 1986-12-16 Nordson Corporation Electrostatic isolation apparatus and method
US4621268A (en) * 1984-02-08 1986-11-04 Keeling Michael R Fluid application method and apparatus
US4854506A (en) * 1984-12-20 1989-08-08 Imperial Chemical Industries Plc Electrostatic spraying
US5021803A (en) * 1985-01-18 1991-06-04 Imperial Chemical Industries Plc Ink jet parallel cusp producing slot or edge configured nozzle system
WO1987001335A1 (en) * 1985-09-09 1987-03-12 Eastman Kodak Company Print head for continuous ink jet printer
US4636808A (en) * 1985-09-09 1987-01-13 Eastman Kodak Company Continuous ink jet printer
US5086973A (en) * 1990-04-11 1992-02-11 Terronics Development Corp. Nozzle modulators
US5332154A (en) * 1992-02-28 1994-07-26 Lundy And Associates Shoot-up electrostatic nozzle and method
US20060197803A1 (en) * 2005-03-07 2006-09-07 Steiner Thomas W Apparatus and method for electrostatically charging fluid drops
US7533965B2 (en) 2005-03-07 2009-05-19 Eastman Kodak Company Apparatus and method for electrostatically charging fluid drops
WO2012162354A1 (en) 2011-05-25 2012-11-29 Eastman Kodak Company Liquid ejection using drop charge and mass
WO2012162082A1 (en) 2011-05-25 2012-11-29 Eastman Kodak Company Liquid ejection system including drop velocity modulation
US9475287B2 (en) * 2011-05-27 2016-10-25 Markem-Image Holding Binary continuous ink jet printer
US20140168322A1 (en) * 2011-05-27 2014-06-19 Markem-Imaje Binary continuous ink jet printer
CN103302971A (zh) * 2012-03-12 2013-09-18 张爱明 一种连续喷墨的喷头
WO2013142233A1 (en) 2012-03-20 2013-09-26 Eastman Kodak Company Drop placement error reduction in electrostatic printer
US8646882B2 (en) 2012-03-20 2014-02-11 Eastman Kodak Company Drop placement error reduction in electrostatic printer
US8646883B2 (en) 2012-03-20 2014-02-11 Eastman Kodak Company Drop placement error reduction in electrostatic printer
US8651632B2 (en) 2012-03-20 2014-02-18 Eastman Kodak Company Drop placement error reduction in electrostatic printer
US8651633B2 (en) 2012-03-20 2014-02-18 Eastman Kodak Company Drop placement error reduction in electrostatic printer
WO2013142451A1 (en) 2012-03-20 2013-09-26 Eastman Kodak Company Drop placement error reduction in electrostatic printer
WO2013191959A1 (en) 2012-06-22 2013-12-27 Eastman Kodak Company Variable drop volume continuous liquid jet printing
US8641175B2 (en) 2012-06-22 2014-02-04 Eastman Kodak Company Variable drop volume continuous liquid jet printing
US8585189B1 (en) 2012-06-22 2013-11-19 Eastman Kodak Company Controlling drop charge using drop merging during printing
US8696094B2 (en) 2012-07-09 2014-04-15 Eastman Kodak Company Printing with merged drops using electrostatic deflection
US10336077B2 (en) 2015-12-22 2019-07-02 Dover Europe Sàrl Print head or ink jet printer with reduced solvent consumption
US11084288B2 (en) 2015-12-22 2021-08-10 Dover Europe Sàrl Print head or ink jet printer with reduced solvent consumption

Also Published As

Publication number Publication date
CH561084A5 (xx) 1975-04-30
JPS5148859B1 (xx) 1976-12-23
DE2159819B2 (de) 1975-09-18
AU3636571A (en) 1973-06-21
NL7116762A (xx) 1972-06-12
CA940192A (en) 1974-01-15
BE776364A (fr) 1972-04-04
NL157716B (nl) 1978-08-15
FR2117923A1 (xx) 1972-07-28
AU472244B2 (en) 1976-05-20
IT940399B (it) 1973-02-10
SE377210B (xx) 1975-06-23
FR2117923B1 (xx) 1975-08-29
DE2159819A1 (de) 1972-06-29

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