US3848258A - Multi-jet ink printer - Google Patents

Multi-jet ink printer Download PDF

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Publication number
US3848258A
US3848258A US00392913A US39291373A US3848258A US 3848258 A US3848258 A US 3848258A US 00392913 A US00392913 A US 00392913A US 39291373 A US39291373 A US 39291373A US 3848258 A US3848258 A US 3848258A
Authority
US
United States
Prior art keywords
nozzles
array
record medium
fluid
voltage pulses
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
US00392913A
Other languages
English (en)
Inventor
J Mahoney
J Perel
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.)
Xerox Corp
Original Assignee
Xerox Corp
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 Xerox Corp filed Critical Xerox Corp
Priority to US00392913A priority Critical patent/US3848258A/en
Priority to CA199,361A priority patent/CA1000778A/en
Priority to FR7419592A priority patent/FR2242246B1/fr
Priority to DE2431159A priority patent/DE2431159A1/de
Priority to BR5352/74A priority patent/BR7405352A/pt
Priority to NL7409095A priority patent/NL7409095A/xx
Priority to BE147835A priority patent/BE819105A/xx
Priority to JP49096967A priority patent/JPS5051633A/ja
Priority to IT26601/74A priority patent/IT1020191B/it
Priority to GB3784074A priority patent/GB1473007A/en
Application granted granted Critical
Publication of US3848258A publication Critical patent/US3848258A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • 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
    • B41J2/135—Nozzles
    • B41J2/145—Arrangement thereof
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S101/00—Printing
    • Y10S101/37—Printing employing electrostatic force

Definitions

  • ABSTRACT An ink printer system in which line thickness and line separation are regulated by disposing a plurality of ink nozzles in a converging array and limiting undesirable electrostatic attraction forces active in the system.
  • an electrode is positioned between each adjacent pair of nozzles of the array with the electrodes being connected to a dc. source having a value less than the peak value of the voltage pulses applied to the nozzles.
  • alternate nozzles of the array receive video pulses of the opposite polarity whereby jets of ink drops having opposite charges are formed by adjacent nozzles of the array.
  • Prior art devices for recording with liquid ink are generally of three basic types.
  • the first type operates with physical contact between an ink-fed stylus and a recording surface with the stylus being physically removable from the recording surface on receipt of an appropriate signal.
  • Drawbacks of this system include .difficulty associated with physical removal of the stylus under varying conditions of operation. At high operating speeds, such as is associated with a fast flow of intelligence, a highly damped, relatively non-elastic mechanical system is required which becomes impractical or impossible to construct.
  • a second of the prior existing types for liquid ink recording devices is one in which an ink-fed stylus is maintained in constant contact against a recording surface and is moved relative thereto in order to record inform ation, Like the last mentioned type, this provides a continuous mark onthe recording surface at all times when the stylus and recording surface are in contact.
  • This type has been largely limited in practical applications to oscillograph use since mechanical complexity has been regarded as too prohibitive to control a continuously marking stylus for the tortuous configurations necessary for modern, sophisticated writing.
  • ink spitters includes devices in which ink is projected across a gap from'a nozzle point to a recording medium.
  • One type of ink spitter is known as a continuous flow system in which ink drops are formed continuously in response to pressure and vibration.
  • a charging tunnel through which the ink drops are projected and which serves the function of applying charge to selected ink drops in accordance with a desired video signal to be produced.
  • Downstream of the tunnel there is provided a set of deflecting plates which have a potential difference between them. The electric field which is created between the plates acts on the charged drops causing them to be deflected in an amount determined by the amplitude of the applied potential difference.
  • a trough Downstream of the deflection plates, a trough is provided for catching drops which do not have any charge and transferring them to a waste reservoir.
  • a writing medium which receives the deflected ink drops, whereby an image representative of I the video signals is produced.
  • the writing medium is usually moved in synchronism with the application of the video signals to the drops.
  • a second type of ink spitter is known as an ondemand system in which ink drops are formed selectively in accordance with the video signal, all ink drops formed impinge on the recording medium.
  • Such systems are described in U.S. Pat. Nos. 3,341,859 and 2,143,376.
  • a conductive bar is placed behind the writing medium with a voltage of one polarity applied to the bar that is insufficient to draw ink from the nozzle.
  • square wave or rectangular wave voltage pulses of the other polarity are selectively applied to the nozzle, and the paper is moved. The resulting electrostatic field between the nozzle and the bar will overcome the liquid surface tension and draw ink from the nozzle to the writing medium.
  • the electrostatic forces on the ink drops near the nozzles causes the jets to diverge while moving toward the writing medium.
  • This repulsion results in an undesirable widening of the line thickness and, in some cases, variable line thicknesses.
  • the electrostatic repulsion makes it difficult to provide two ink lines with a fixed spacing therebetween.
  • an ink printing system in which line thickness and line separation are regulated by disposing a plurality of ink nozzles in a converging array and limiting undesirable electrostatic attraction forces acting on the jets of charged ink drops emanating from the nozzles.
  • an electrode is positioned between each adjacent pair of nozzles of the array with the electrodes being connected to a dc. source having a value less than the peak value of the voltage pulses applied to the nozzles.
  • polarity of the dc. source is generally the same as that of the voltage pulses applied to the nozzles.
  • alternate nozzles of the array receive video pulses of the opposite polarity whereby jets of ink drops having opposite charges are formed by adjacent nozzles of the array.
  • FIG. 1 is a schematic diagram of one embodiment of the ink printing system in accordance with the present invention.
  • FIG. 2 shows a waveform that can be supplied to the nozzles of the ink printing systems of FIGS. 1 and 3.
  • FIG. 3 is a second embodiment of an ink printing system in accordance with the present invention.
  • Nozzles 10, 12, and 14 are positioned in a converging array such that ink drops emanating therefrom are projected toward a common area 22 of a recording medium 24 which passes over a platen 26 which is preferably at ground potential. While it is presently contemplated that the preferred form of the invention would include a circular array of nozzles with uniform spacing between nozzles, it will be appreciated that such uniform spatial relationship of the nozzles is not essential.
  • the ink drops of the jets flowing from the nozzles will have that polarity, that is, if a positive going voltage pulse is supplied to the nozzles 10, 12, and 14, the ink drops of the jets flowing from the nozzles will have a positive charge.
  • the electrostatic interaction forces active in the 'vicinity of the nozzles causes the trajecto-' 22, each nozzle producing one line, the electrostatic forces on the jets of ink drops may cause the line spacing to increase or vary sporadically.
  • Electrodes'28 and 30 have a dc. signal supplied thereto which signal has a value between the maximum value of the pulses supplied to the nozzles and the potential of platen 26. For example, if the voltage pulses supplied to nozzles 10, 12, and 14, by source 32 have a maximum positive value of 3-3.5 kilovolts with respect to ground, and the platen 26 is grounded, the dc. signal supplied to electrodes 28 and 30 would have a positive value of between 2-2.5 kilovolts with respect to ground.
  • the value of the signals applied to the nozzles and the electrodes 28 and 30 could be reduced and, if the negative potential on platen 26 had a sufficient value, the signal applied to electrodes 28 and 30 may beof the opposite polarity as the signal applied to the nozzles.
  • the intermediate electrodes 28 and 30 control electrostatic interaction between adjacent nozzles, and hence control electrostatic forces on newly formed ink drops with the result that the trajectories of the ink drops from the different nozzles do not diverge.
  • FIG; 2 depicts the pulses of a waveform 40 illustrative of the signal supplied by source 32, each pulse producing desirably several ink drops.
  • each pulse has a rapidly rising leading edge 42 which increases to a predetermined level 44 of, for example, 3500 volts with the nozzles and ink specifically men tioned previously, and is maintained at level 44 for a brief period, microseconds being appropriate.
  • the trailing edge 45 of each pulse decreases slowly either linearly or exponentially, as shown, to about base level 43.
  • FIG. is illustrative of another embodiment of the invention in which divergence of the trajectories of jets of ink drops from different nozzles of any array is controlled without intermediate electrodes.
  • the waveform supplied to the intermediate nozzle 12 is of the polarity opposite to the polarity of the waveforms supplied to nozzles 10 and 14. As shown, this can be achieved by means of a conventional inverter circuit 46 disposed in the circuit supplying nozzle 12.
  • the ink drops from nozzles 10 and 14 for example, have a positive polarity, and the ink drops from nozzle 12 have a negative polarity. Since the ink drops of the jet from middle nozzle 12 are of the polarity opposite to those ink drops from the outer nozzles 10 and 14, repulsion forces between the outer jets is pre-.
  • a fluid printer for writing on a record medium comprising:
  • a fluid printer for writing on a record medium comprising:
  • a fluid printer for writing on a record medium comprising:
  • third means for supplying to said electrodes a potential having a value between said peak value and said reference value thereby to allow fluid drops from said capillary tips to converge toward said area of said record medium even though the drops have the same polarity due to voltage pulses of the same polarity being applied to the fluid contained in said nozzles.
  • a fluid printer for writing on a record medium comprising:

Landscapes

  • Particle Formation And Scattering Control In Inkjet Printers (AREA)
  • Facsimile Heads (AREA)
US00392913A 1973-08-30 1973-08-30 Multi-jet ink printer Expired - Lifetime US3848258A (en)

Priority Applications (10)

Application Number Priority Date Filing Date Title
US00392913A US3848258A (en) 1973-08-30 1973-08-30 Multi-jet ink printer
CA199,361A CA1000778A (en) 1973-08-30 1974-05-07 Multi-jet ink printer
FR7419592A FR2242246B1 (pt) 1973-08-30 1974-06-06
BR5352/74A BR7405352A (pt) 1973-08-30 1974-06-28 Aperfeicoada impressora a fluido para escrever em um meio de registro
DE2431159A DE2431159A1 (de) 1973-08-30 1974-06-28 Fluidschreiber
NL7409095A NL7409095A (pt) 1973-08-30 1974-07-04
BE147835A BE819105A (fr) 1973-08-30 1974-08-22 Dispositif d'enregistrement a encre a jets multiples
JP49096967A JPS5051633A (pt) 1973-08-30 1974-08-23
IT26601/74A IT1020191B (it) 1973-08-30 1974-08-26 Stampatrice a fluido per scrivere su un mezzo di registrazione
GB3784074A GB1473007A (en) 1973-08-30 1974-08-29 Multi-jet ink printer

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US00392913A US3848258A (en) 1973-08-30 1973-08-30 Multi-jet ink printer

Publications (1)

Publication Number Publication Date
US3848258A true US3848258A (en) 1974-11-12

Family

ID=23552531

Family Applications (1)

Application Number Title Priority Date Filing Date
US00392913A Expired - Lifetime US3848258A (en) 1973-08-30 1973-08-30 Multi-jet ink printer

Country Status (10)

Country Link
US (1) US3848258A (pt)
JP (1) JPS5051633A (pt)
BE (1) BE819105A (pt)
BR (1) BR7405352A (pt)
CA (1) CA1000778A (pt)
DE (1) DE2431159A1 (pt)
FR (1) FR2242246B1 (pt)
GB (1) GB1473007A (pt)
IT (1) IT1020191B (pt)
NL (1) NL7409095A (pt)

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3893131A (en) * 1973-09-04 1975-07-01 Xerox Corp Ink printer
US4104645A (en) * 1975-10-28 1978-08-01 Xerox Corporation Coincidence ink jet
US4199769A (en) * 1978-12-04 1980-04-22 Xerox Corporation Coincidence gate ink jet with increased operating pressure window
US4199770A (en) * 1978-12-04 1980-04-22 Xerox Corporation Coincidence gate ink jet with increased operating pressure window
US4201995A (en) * 1978-12-04 1980-05-06 Xerox Corporation Coincidence gate ink jet with increased operating pressure window
US4251823A (en) * 1978-09-01 1981-02-17 Hitachi, Ltd. Ink jet recording apparatus
US4349830A (en) * 1980-11-12 1982-09-14 Burroughs Corporation Conical nozzle for an electrostatic ink jet printer
US4364067A (en) * 1979-10-29 1982-12-14 Kabushiki Kaisha Suwa Seikosha Highly integrated ink jet head
US4468679A (en) * 1981-05-11 1984-08-28 Nippon Electric Co., Ltd. On-demand type ink-jet printer
US5854648A (en) * 1990-08-02 1998-12-29 Canon Kabushiki Kaisha Ink jet recording method and apparatus
FR2835217A1 (fr) * 2002-01-28 2003-08-01 Imaje Sa Tete d'impression a double buse d'axes convergents et imprimante equipee
US20040217006A1 (en) * 2003-03-18 2004-11-04 Small Robert J. Residue removers for electrohydrodynamic cleaning of semiconductors
CN114919291A (zh) * 2022-05-10 2022-08-19 华南理工大学 一种异极性双电喷头装置及其喷印方法

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT1116334B (it) * 1977-12-28 1986-02-10 Olivetti & Co Spa Dispositivo di scrittura senza impatto ad emissione selettiva di particelle solide di inchiostro
JPS5587572A (en) * 1978-12-27 1980-07-02 Seiko Epson Corp Ink injection head
JPS55154169A (en) * 1979-05-18 1980-12-01 Ricoh Co Ltd Ink-jet printer
DE3004541C2 (de) * 1980-02-07 1982-03-04 Siemens AG, 1000 Berlin und 8000 München Mehrkanaliges, schreibendes Meßgerät
JPH0356365Y2 (pt) * 1985-08-23 1991-12-18

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3052213A (en) * 1958-12-17 1962-09-04 Ibm Electrostatic printer apparatus for printing with liquid ink
US3341859A (en) * 1964-08-19 1967-09-12 Dick Co Ab Ink jet printer
US3446183A (en) * 1967-07-14 1969-05-27 Ransburg Electro Coating Corp Coating system

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3052213A (en) * 1958-12-17 1962-09-04 Ibm Electrostatic printer apparatus for printing with liquid ink
US3341859A (en) * 1964-08-19 1967-09-12 Dick Co Ab Ink jet printer
US3446183A (en) * 1967-07-14 1969-05-27 Ransburg Electro Coating Corp Coating system

Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3893131A (en) * 1973-09-04 1975-07-01 Xerox Corp Ink printer
US4104645A (en) * 1975-10-28 1978-08-01 Xerox Corporation Coincidence ink jet
US4251823A (en) * 1978-09-01 1981-02-17 Hitachi, Ltd. Ink jet recording apparatus
US4199769A (en) * 1978-12-04 1980-04-22 Xerox Corporation Coincidence gate ink jet with increased operating pressure window
US4199770A (en) * 1978-12-04 1980-04-22 Xerox Corporation Coincidence gate ink jet with increased operating pressure window
US4201995A (en) * 1978-12-04 1980-05-06 Xerox Corporation Coincidence gate ink jet with increased operating pressure window
US4364067A (en) * 1979-10-29 1982-12-14 Kabushiki Kaisha Suwa Seikosha Highly integrated ink jet head
US4349830A (en) * 1980-11-12 1982-09-14 Burroughs Corporation Conical nozzle for an electrostatic ink jet printer
US4468679A (en) * 1981-05-11 1984-08-28 Nippon Electric Co., Ltd. On-demand type ink-jet printer
US5854648A (en) * 1990-08-02 1998-12-29 Canon Kabushiki Kaisha Ink jet recording method and apparatus
FR2835217A1 (fr) * 2002-01-28 2003-08-01 Imaje Sa Tete d'impression a double buse d'axes convergents et imprimante equipee
WO2003064162A1 (fr) * 2002-01-28 2003-08-07 Imaje S.A. Tete d'impression a double buse d'axes convergents et imprimante equipee
US20050122381A1 (en) * 2002-01-28 2005-06-09 Thierry Golombat Converging axis dual-nozzled print head and printer fitted therewith
US7175263B2 (en) 2002-01-28 2007-02-13 Imaje Sa Converging axis dual-nozzled print head and printer fitted therewith
US20040217006A1 (en) * 2003-03-18 2004-11-04 Small Robert J. Residue removers for electrohydrodynamic cleaning of semiconductors
CN114919291A (zh) * 2022-05-10 2022-08-19 华南理工大学 一种异极性双电喷头装置及其喷印方法

Also Published As

Publication number Publication date
BE819105A (fr) 1974-12-16
BR7405352A (pt) 1976-02-24
JPS5051633A (pt) 1975-05-08
CA1000778A (en) 1976-11-30
IT1020191B (it) 1977-12-20
GB1473007A (en) 1977-05-11
DE2431159A1 (de) 1975-03-06
FR2242246A1 (pt) 1975-03-28
NL7409095A (pt) 1974-09-25
FR2242246B1 (pt) 1976-12-24

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