US3673601A - Liquid jet recorder - Google Patents

Liquid jet recorder Download PDF

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Publication number
US3673601A
US3673601A US24140A US3673601DA US3673601A US 3673601 A US3673601 A US 3673601A US 24140 A US24140 A US 24140A US 3673601D A US3673601D A US 3673601DA US 3673601 A US3673601 A US 3673601A
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US
United States
Prior art keywords
liquid jet
nozzle
jet
jet recorder
applying
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
US24140A
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English (en)
Inventor
Carl Hellmuth Hertz
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Individual
Original Assignee
Individual
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Filing date
Publication date
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Publication of US3673601A publication Critical patent/US3673601A/en
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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
    • B41J2/17—Ink jet characterised by ink handling
    • B41J2/18—Ink recirculation systems
    • B41J2/185—Ink-collectors; Ink-catchers
    • 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
    • B41J2/015—Ink jet characterised by the jet generation process
    • B41J2/02—Ink jet characterised by the jet generation process generating a continuous ink jet
    • B41J2/03—Ink jet characterised by the jet generation process generating a continuous ink jet by pressure
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N1/00—Scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission; Details thereof
    • H04N1/024—Details of scanning heads ; Means for illuminating the original
    • H04N1/032—Details of scanning heads ; Means for illuminating the original for picture information reproduction
    • H04N1/034—Details of scanning heads ; Means for illuminating the original for picture information reproduction using ink, e.g. ink-jet heads
    • 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
    • B41J2002/1853—Ink-collectors; Ink-catchers ink collectors for continuous Inkjet printers, e.g. gutters, mist suction means

Definitions

  • the prcscm device is a liquid jet recorder having a capillary nozzle out of which an electrically conductive ink jet is ex- U.S. Cl ..346/75 pelled by pressure and a comm] electrode or tube coaxiauy surrounding the path of the jet, the wall of the tube being [58] Field of Search ..346/75 porous to the ink and famed of an elecmcauy conductive material.
  • Charging means are included for charging the jet at [56] Rdmnces cited one potential and the electrode at another potential.
  • a principal object of the present invention is to provide means for reducing the background provided by such control electrodes. Another object of the present invention is to increase the upper limit frequency of writing devices employing such control electrodes.
  • the present invention incorporates by reference the system shown in the aforesaid patent application and therefore includes jet nozzle 20 through which fluid ink 22 is expressed along axis A-A as a jet to ultimately under certain conditions impinge upon a recording surface such as paper 24 mounted on.a movable member such as drum 25.
  • the jet is controlled by control electrode 26 having a hollow elongated interior formed of electrically conductive material and being axially aligned with axis A-A.
  • the interior of the electrode 26 is lined with a porous material on liner 27 backed by suction chamber 28.
  • a suction pump 29 is connected through conduit 30 to chamber 28 for applying a net negative air pressure to the latter.
  • the electrode is charged with a control voltage provided by a connection between liner 27 and source 34 while the fluid in nozzle 20 is kept at another voltage as by grounded contact 32.
  • the dispersion of the jet is not sufficient to insure that all the ink impinges on the liner 27 and, thus, there is a tendency to create a background on paper 24.
  • this background can be suppressed by applying a high electrostatic charge on the surface of recording paper 24 typically of the same sign or polarity as the electric charge of the drops in the dispersed jet. This results in the drops in the dispersed jet being repelled back toward control electrode 26 and thus prevent the formation of background on the recording paper.
  • the above-mentioned charge can be obtained in various ways. As normal paper generally is not quite insulating, it is 1 necessary to insulate drum 25 from the environment. This is best done by making the whole drum or part thereof from an insulating material. The above-mentioned charge can thenbe applied to the paper surface by arranging one or more conductive points 36 or, in the immediate vicinity of the drum, a thin wire which is parallel to the-drum. Point 36, or the wire, is connected to source 40 of high voltage so that a corona discharge arises at point 36 orthe wire. This gives the paper surface the desired electric charge which prevents the dispersed drops from reaching the paper surface. The distance from the corona point to the recording paper is preferably about 5-10 mm. and the: voltage applied at the corona points about 8-10 kv. I
  • the outer drum surface is made from conductive material, an electric voltage can be applied to this coating by means of a sliding contact. Due to the conductivity of the recording paper, paper surface 24 then will have the same potential. This system has the advantage that the voltage required to repel the dispersed drops is somewhat smaller.
  • the sliding contact may also be applied directly so that it slides on. the paper surface proper, as shown in the drawing by the sliding contact 38 represented by dotted lines.
  • liquid jet is not laterally dispersed and thus increase its diameter (i.e., become a conical spray) on its way towards the recording paper when control electrode 26 is held atground potential, i.e., the same potential as the. tracing liquid. This requires that nozzle 20 be very carefully designed.
  • the dispersion effect can be made more efficient if the drop formation process in front of nozzle 20 can be controlled. Further, the upper'limit frequency of the writing device increases the more drops and the more uniform drops there are formed per second at the drop formation point. This can be done mechanically by vibrating the nozzle at a suitable frequency which is dependent inter alia, on the diameter of the nozzle.
  • the simplest way of doing this is to apply a vibrator 42, e.g., a piezo-electric crystal to the vicinity of the nozzle 20, for instance, at its feed tube or mounting means, as shown in the drawing.
  • a vibrator 42 e.g., a piezo-electric crystal
  • this vibrating system which preferably oscillates along the jet axis A-A, gives better resolution than that obtained by the device described in the aforesaid patent application; i.e., it allows the jet to trace or print with more accuracy in that it provides droplets with uniform fluid dynamics and thus uniform mechanical flight characteristics.
  • the nozzle vibration frequency should be carefully synchronized to the frequencies applied to the droplet charging electrode.
  • this synchronization aspect is quite unnecessary and, in-
  • the frequency of nozzle vibration can be quite different than the frequency applied at electrode 26.
  • Another advantage of the present invention over the electrode device described in the aforesaid patent application is that a large number of such electrodes may be placed side by side without the electric fields from adjacent control electrodes interfering with the field. at the drop formation point of their respective liquid jets.
  • the advantage of this in connection with writing out numbers has already been pointed out in the aforesaid patent application. It is clear, however, that the number of such writing units that can be placed beside or obliquely after each other is unlimited so that a whole surface can at the same time be provided with writing by means of a large number of liquid jets, the writing traces of which lie very closely beside each other.
  • a fine jet of-an electrically conductive tracing fluid from a capillary nozzle, and including a control electrode positioned adjacent said nozzle at the point of droplet formation, and means for selectively applying between said nozzle and electrode a potential sufficient to cause said jet to disperse into a conical spray, the
  • said means for applying said charge comprises at least one metallic point positioned adjacent to said surface and connected to a voltage source so as to provide a corona discharge to said surface for charging the latter.

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Particle Formation And Scattering Control In Inkjet Printers (AREA)
US24140A 1969-04-02 1970-03-31 Liquid jet recorder Expired - Lifetime US3673601A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE4689/69A SE342334B (ja) 1969-04-02 1969-04-02

Publications (1)

Publication Number Publication Date
US3673601A true US3673601A (en) 1972-06-27

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Family Applications (1)

Application Number Title Priority Date Filing Date
US24140A Expired - Lifetime US3673601A (en) 1969-04-02 1970-03-31 Liquid jet recorder

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US (1) US3673601A (ja)
SE (1) SE342334B (ja)

Cited By (48)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3750564A (en) * 1971-02-05 1973-08-07 Olympia Werke Ag Electrostatic capillary apparatus for producing an imprint
US3898670A (en) * 1972-06-30 1975-08-05 Rolf Bernhard Erikson Line printer incorporating liquid ink jet recording
US3945022A (en) * 1973-10-01 1976-03-16 Siemens Aktiengesellschaft Liquid jet recorder
US3945020A (en) * 1973-10-01 1976-03-16 Siemens Aktiengesellschaft Liquid jet recorder
US3945021A (en) * 1973-10-02 1976-03-16 Siemens Aktiengesellschaft Liquid jet recorder
US3987492A (en) * 1973-10-01 1976-10-19 Siemens Aktiengesellschaft Liquid jet recorder
US3988740A (en) * 1971-09-25 1976-10-26 Agfa-Gevaert, A.G. Apparatus for depositing liquid droplets on a moving receiving surface
JPS51132835A (en) * 1975-05-13 1976-11-18 Nippon Telegr & Teleph Corp <Ntt> Deflection electrode
US4001839A (en) * 1973-10-02 1977-01-04 Siemens Aktiengesellschaft Liquid jet recorder
US4019188A (en) * 1975-05-12 1977-04-19 International Business Machines Corporation Micromist jet printer
DE2741151A1 (de) * 1976-09-13 1978-03-16 Bell & Howell Co Tintenstrahldrucker mit ablenkbaren duesen
US4126711A (en) * 1974-09-24 1978-11-21 Xerox Corporation Charge pattern development method and apparatus
US4135196A (en) * 1976-09-22 1979-01-16 Sharp Kabushiki Kaisha Grooved charging electrode in an ink jet system printer
US4170016A (en) * 1977-12-12 1979-10-02 Gould Inc. Priming apparatus for liquid ink writing instruments
US4272772A (en) * 1977-12-12 1981-06-09 Gould Inc. Priming apparatus for liquid ink writing instruments
US4410900A (en) * 1979-10-23 1983-10-18 Canon Kabushiki Kaisha Ink jet recording apparatus
US4523202A (en) * 1981-02-04 1985-06-11 Burlington Industries, Inc. Random droplet liquid jet apparatus and process
US4543591A (en) * 1982-05-11 1985-09-24 Canon Kabushiki Kaisha Suction recovery apparatus
US4644369A (en) * 1981-02-04 1987-02-17 Burlington Industries, Inc. Random artificially perturbed liquid jet applicator apparatus and method
US4668959A (en) * 1985-12-10 1987-05-26 Iris Graphics Inc. Mist reduction for ink jet printers
US4668533A (en) * 1985-05-10 1987-05-26 E. I. Du Pont De Nemours And Company Ink jet printing of printed circuit boards
US4698642A (en) * 1982-09-28 1987-10-06 Burlington Industries, Inc. Non-artifically perturbed (NAP) liquid jet printing
US4829325A (en) * 1986-11-14 1989-05-09 Matsushita Electric Industrial Co., Ltd. Ink jet recording apparatus with an electrode disposed at writing paper side
US4839664A (en) * 1987-07-02 1989-06-13 Burlington Industries, Inc. Fluid-jet catcher with removable porous metal ingestion blade
US5142297A (en) * 1989-03-28 1992-08-25 Stork X-Cel B.V. Nozzle configuration for an ink-jet printer and process for operating such a nozzle configuration
US5270368A (en) * 1992-07-15 1993-12-14 Videojet Systems International, Inc. Etch-resistant jet ink and process
US5395432A (en) * 1993-10-05 1995-03-07 Videojet Systems International, Inc. Security jet ink
WO1995035212A1 (en) * 1994-06-17 1995-12-28 Natural Imaging Corporation Electrohydrodynamic ink jet printer and printing method
EP0747220A2 (en) * 1995-06-07 1996-12-11 Xerox Corporation Electric-field manipulation of ejected ink drops in printing
US5594044A (en) * 1995-03-03 1997-01-14 Videojet Systems International, Inc. Ink jet ink which is rub resistant to alcohol
US5596027A (en) * 1995-07-13 1997-01-21 Videojet Systems International, Inc. Condensation and water resistant jet ink
US5652286A (en) * 1995-02-03 1997-07-29 Videojet Systems International, Inc. Wet surface marking jet ink
US5755860A (en) * 1996-12-19 1998-05-26 Videojet Systems International, Inc. Invisible fluorescent jet ink
US5889083A (en) * 1996-09-06 1999-03-30 Videojet Systems International, Inc. Aqueous jet ink compositions
US6010564A (en) * 1997-10-16 2000-01-04 Videojet Systems International, Inc. Jet ink composition
DE19847421A1 (de) * 1998-10-14 2000-04-20 Easy Lab Gmbh Pipettier- oder Dosierverfahren und -vorrichtung
US6140391A (en) * 1998-10-09 2000-10-31 Marconi Data Systems Inc. Reactive jet ink composition
US6221933B1 (en) 1998-02-27 2001-04-24 Marconi Data Systems Inc. Fast drying jet ink composition
US6251175B1 (en) 1998-08-06 2001-06-26 Marconi Data Systems Inc. Jet ink composition
US6312113B1 (en) 1999-10-29 2001-11-06 Marconi Data Systems Inc. Ink circulation system
US6444019B1 (en) 1998-11-06 2002-09-03 Videojet Technologies Inc. Ink jet ink composition
US6726756B1 (en) 2000-05-26 2004-04-27 Videojet Technologies Inc. Continuous ink jet printing ink composition
US20040110868A1 (en) * 2002-12-09 2004-06-10 Videojet Technologies Inc. Opaque ink jet ink composition
US20040154495A1 (en) * 2003-02-12 2004-08-12 Videojet Technologies Inc. Jet ink composition for low surface energy substrates
US20040220298A1 (en) * 2003-03-13 2004-11-04 Videojet Technologies Inc. Ink jet ink composition and method for security marking
WO2005105468A1 (en) 2004-04-30 2005-11-10 Videojet Technologies Inc. Method for improving the quality of ink jet printed images
WO2011018786A1 (en) 2009-08-10 2011-02-17 Kornit Digital Ltd. Inkjet compositions and processes for stretchable substrates
US9114609B1 (en) 2014-05-16 2015-08-25 Xerox Corporation System and method for ink drop acceleration with time varying electrostatic fields

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1941001A (en) * 1929-01-19 1933-12-26 Rca Corp Recorder
US3369252A (en) * 1964-06-10 1968-02-13 Dick Co Ab Ink drop printer
US3416153A (en) * 1965-10-08 1968-12-10 Hertz Ink jet recorder
US3500436A (en) * 1968-01-08 1970-03-10 Teletype Corp Fluid transfer device

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1941001A (en) * 1929-01-19 1933-12-26 Rca Corp Recorder
US3369252A (en) * 1964-06-10 1968-02-13 Dick Co Ab Ink drop printer
US3416153A (en) * 1965-10-08 1968-12-10 Hertz Ink jet recorder
US3500436A (en) * 1968-01-08 1970-03-10 Teletype Corp Fluid transfer device

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
Hertz et al.; A method for the Intensity Modulation of a Recording Inkjet and its Applications; ACTA Universitatis Lundensia II 1967, No. 15. *

Cited By (57)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3750564A (en) * 1971-02-05 1973-08-07 Olympia Werke Ag Electrostatic capillary apparatus for producing an imprint
US3988740A (en) * 1971-09-25 1976-10-26 Agfa-Gevaert, A.G. Apparatus for depositing liquid droplets on a moving receiving surface
US3898670A (en) * 1972-06-30 1975-08-05 Rolf Bernhard Erikson Line printer incorporating liquid ink jet recording
US3945022A (en) * 1973-10-01 1976-03-16 Siemens Aktiengesellschaft Liquid jet recorder
US3945020A (en) * 1973-10-01 1976-03-16 Siemens Aktiengesellschaft Liquid jet recorder
US3987492A (en) * 1973-10-01 1976-10-19 Siemens Aktiengesellschaft Liquid jet recorder
US3945021A (en) * 1973-10-02 1976-03-16 Siemens Aktiengesellschaft Liquid jet recorder
US4001839A (en) * 1973-10-02 1977-01-04 Siemens Aktiengesellschaft Liquid jet recorder
US4126711A (en) * 1974-09-24 1978-11-21 Xerox Corporation Charge pattern development method and apparatus
US4019188A (en) * 1975-05-12 1977-04-19 International Business Machines Corporation Micromist jet printer
JPS562025B2 (ja) * 1975-05-13 1981-01-17
JPS51132835A (en) * 1975-05-13 1976-11-18 Nippon Telegr & Teleph Corp <Ntt> Deflection electrode
DE2741151A1 (de) * 1976-09-13 1978-03-16 Bell & Howell Co Tintenstrahldrucker mit ablenkbaren duesen
US4135196A (en) * 1976-09-22 1979-01-16 Sharp Kabushiki Kaisha Grooved charging electrode in an ink jet system printer
US4170016A (en) * 1977-12-12 1979-10-02 Gould Inc. Priming apparatus for liquid ink writing instruments
US4272772A (en) * 1977-12-12 1981-06-09 Gould Inc. Priming apparatus for liquid ink writing instruments
US4600931A (en) * 1979-10-23 1986-07-15 Canon Kabushiki Kaisha Ink jet recording apparatus
US4410900A (en) * 1979-10-23 1983-10-18 Canon Kabushiki Kaisha Ink jet recording apparatus
US4523202A (en) * 1981-02-04 1985-06-11 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
US4543591A (en) * 1982-05-11 1985-09-24 Canon Kabushiki Kaisha Suction recovery apparatus
US4698642A (en) * 1982-09-28 1987-10-06 Burlington Industries, Inc. Non-artifically perturbed (NAP) liquid jet printing
US4668533A (en) * 1985-05-10 1987-05-26 E. I. Du Pont De Nemours And Company Ink jet printing of printed circuit boards
US4668959A (en) * 1985-12-10 1987-05-26 Iris Graphics Inc. Mist reduction for ink jet printers
WO1987003678A1 (en) * 1985-12-10 1987-06-18 Iris Graphics, Inc. Ink jet printer electrical field-mist reduction system
US4829325A (en) * 1986-11-14 1989-05-09 Matsushita Electric Industrial Co., Ltd. Ink jet recording apparatus with an electrode disposed at writing paper side
US4839664A (en) * 1987-07-02 1989-06-13 Burlington Industries, Inc. Fluid-jet catcher with removable porous metal ingestion blade
US5142297A (en) * 1989-03-28 1992-08-25 Stork X-Cel B.V. Nozzle configuration for an ink-jet printer and process for operating such a nozzle configuration
US5270368A (en) * 1992-07-15 1993-12-14 Videojet Systems International, Inc. Etch-resistant jet ink and process
US5395432A (en) * 1993-10-05 1995-03-07 Videojet Systems International, Inc. Security jet ink
WO1995035212A1 (en) * 1994-06-17 1995-12-28 Natural Imaging Corporation Electrohydrodynamic ink jet printer and printing method
US5838349A (en) * 1994-06-17 1998-11-17 Natural Imaging Corporation Electrohydrodynamic ink jet printer and printing method
US5652286A (en) * 1995-02-03 1997-07-29 Videojet Systems International, Inc. Wet surface marking jet ink
US5594044A (en) * 1995-03-03 1997-01-14 Videojet Systems International, Inc. Ink jet ink which is rub resistant to alcohol
EP0747220A2 (en) * 1995-06-07 1996-12-11 Xerox Corporation Electric-field manipulation of ejected ink drops in printing
EP0747220A3 (en) * 1995-06-07 1997-07-23 Xerox Corp Influencing the ink droplets ejected during printing by means of an electrical field
US5975683A (en) * 1995-06-07 1999-11-02 Xerox Corporation Electric-field manipulation of ejected ink drops in printing
US5596027A (en) * 1995-07-13 1997-01-21 Videojet Systems International, Inc. Condensation and water resistant jet ink
US5889083A (en) * 1996-09-06 1999-03-30 Videojet Systems International, Inc. Aqueous jet ink compositions
US5755860A (en) * 1996-12-19 1998-05-26 Videojet Systems International, Inc. Invisible fluorescent jet ink
US6010564A (en) * 1997-10-16 2000-01-04 Videojet Systems International, Inc. Jet ink composition
US6221933B1 (en) 1998-02-27 2001-04-24 Marconi Data Systems Inc. Fast drying jet ink composition
US6251175B1 (en) 1998-08-06 2001-06-26 Marconi Data Systems Inc. Jet ink composition
US6140391A (en) * 1998-10-09 2000-10-31 Marconi Data Systems Inc. Reactive jet ink composition
DE19847421A1 (de) * 1998-10-14 2000-04-20 Easy Lab Gmbh Pipettier- oder Dosierverfahren und -vorrichtung
US6444019B1 (en) 1998-11-06 2002-09-03 Videojet Technologies Inc. Ink jet ink composition
US6312113B1 (en) 1999-10-29 2001-11-06 Marconi Data Systems Inc. Ink circulation system
US6726756B1 (en) 2000-05-26 2004-04-27 Videojet Technologies Inc. Continuous ink jet printing ink composition
US20040110868A1 (en) * 2002-12-09 2004-06-10 Videojet Technologies Inc. Opaque ink jet ink composition
US7279511B2 (en) 2002-12-09 2007-10-09 Videojet Technologies Inc. Opaque ink jet ink composition
US20040154495A1 (en) * 2003-02-12 2004-08-12 Videojet Technologies Inc. Jet ink composition for low surface energy substrates
US7309388B2 (en) 2003-02-12 2007-12-18 Videojet Technologies Inc. Jet ink composition for low surface energy substrates
US20040220298A1 (en) * 2003-03-13 2004-11-04 Videojet Technologies Inc. Ink jet ink composition and method for security marking
US7147801B2 (en) 2003-03-13 2006-12-12 Videojet Technologies Inc. Ink jet ink composition and method for security marking
WO2005105468A1 (en) 2004-04-30 2005-11-10 Videojet Technologies Inc. Method for improving the quality of ink jet printed images
WO2011018786A1 (en) 2009-08-10 2011-02-17 Kornit Digital Ltd. Inkjet compositions and processes for stretchable substrates
US9114609B1 (en) 2014-05-16 2015-08-25 Xerox Corporation System and method for ink drop acceleration with time varying electrostatic fields

Also Published As

Publication number Publication date
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