US3737914A - Liquid jet recorder - Google Patents

Liquid jet recorder Download PDF

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Publication number
US3737914A
US3737914A US00128278A US3737914DA US3737914A US 3737914 A US3737914 A US 3737914A US 00128278 A US00128278 A US 00128278A US 3737914D A US3737914D A US 3737914DA US 3737914 A US3737914 A US 3737914A
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Prior art keywords
jets
recorder
fluid
nozzles
jet
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Expired - Lifetime
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US00128278A
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English (en)
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C Hertz
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Individual
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Individual
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Priority claimed from SE04528/70A external-priority patent/SE347375B/xx
Priority claimed from DE19702045617 external-priority patent/DE2045617C2/de
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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
    • 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
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T82/00—Turning
    • Y10T82/25—Lathe
    • Y10T82/2514—Lathe with work feeder or remover
    • Y10T82/2516—Magazine type
    • Y10T82/2518—Bar feeder

Definitions

  • a hollow control electrode is disposed around the point of drop formation so that a large potential pulse imposed between the fluid and [56] Referencgs cued electrode will cause the jet to break up, thus per- UNITED STATES PATENTS mitt ing the jet to be intensity modulated.
  • the jet nozzle 1s supported in an element which can be moved to Johnson fit al vary the direction of the jet axis peridica"y In one lg; gtonet system, a group of such nozzles, mounted to provide a wee e 1 3,416,153 l2/1968 Hertz et a1.
  • LIQUID JET RECORDER This invention relates to graphic recording system and more particularly to a liquid jet recorder.
  • German Auslegeschrift DAS 1,271,754 US Pat. No. 3,416,153 describes a method of intensity-modulating a tracing liquid jet and how this method is practiced.
  • use is made as tracing element of a fine liquid jet which is formed by ink ejected under high pressure from a nozzle. Some millimetres in front of the nozzle, the jet spontaneously breaks up into droplets which are supplied to a record carrier following exactly along a line. If an electrode is disposed in the vicinity of this point of drop formation and a sufficiently high electrical voltage is applied between said electrode and the tracing liquid, it is observed that the liquid jet a short distance behind the point of drop formation dissolves into a diffuse cloud of droplets which produces only a very diffuse coloration of the record carrier. This coloration may finally be eliminated altogether by suitable means so that one obtains on the record carrier an ink trace which permits high-frequency electric modulation.
  • the present invention makes it possible to print alphanumerical characters of desirable quality with the aid of a simple apparatus.
  • the invention opens up avenues for arranging a large number of ink jets which can be electrically modulated independently of each other according to the abovementioned principle, in substantially closer relation than that attainable in using the prior-art electrode systems.
  • FIG. 1 shows the principle of a liquid jet recording system in a possible embodiment of the invention
  • FIG. 2 shows two examples of characters printed by this system
  • FIG. 3 shows a recorder having a plurality of recording systems as illustrated in FIG. 1;
  • FIG. 4 shows two superimposed recorders of the type illustrated in FIG. 3;
  • FIG. 5 shows a structural improvement of the recorder in FIG. 3
  • FIG. 6 shows a recorder having considerably simplifled control electrodes
  • FIGS. 7 9 show alternative embodiments of the control electrode in the recorder shown in FIG. 6;
  • FIG. 10 shows a device that prevents the tracing liquid from drying in the nozzles.
  • FIG. 1 An embodiment of the recording system which is the basis of the invention is illustrated in FIG. 1.
  • Fine capillary tube 12 is fixedly mounted in holder 5 and extends through a hole in plate 6 towards control electrode 3.
  • Plate 6 is secured to resilient means such as leaf spring 7, the other end of which is attached to a support or holder 10.
  • the nozzle 4 at the end of the capillary tube 12 will be caused to swing back and forth in a plane at right angles to the direction of motion of the record carrier 2.
  • Means, not shown, are provided for supporting and moving record carrier 2, typically a paper strip.
  • control electrode 3 While travelling from nozzle 4 to record carrier 2, liquid jet 1 passes through control electrode 3 which is not shown in detail here because its construction is already described in German Offenlegungsschrift 1,950,430.
  • the control electrode may be given, for instance, a rectangular cross section.
  • the shape of the liquid jet may be influenced in a known manner by application of a control voltage derived from electronic generator 11. The latter applies a potential between control electrode 3 and the tracing liquid in capillary tube 12. Because the liquid jet breaks up upon application of the potential as described in German Auslegeschrift'DAS 1,271,754, in this manner there is provided intensity modulation of recording trace 18.
  • Capillary tube 12 in the apparatus illustrated in FIG. 1 is, for instance, a glass tube about 20 mm long and 0.1
  • the tracing liquid is forced through capillary glass tube 12 under a pressure of 20 to 30 atm. gauge and forms a fine linearly collected liquid jet.
  • Plate 6 causes capillary glass tube 12 to oscillate typically at a frequency of about 200 to 1,000 Hz.
  • the record carrier travels past capillary tube 12 at a constant speed of 20 to cm per second and is spaced approximately 25 mm from the nozzle 4.
  • the apparatus shown in FIG. 1, which causes the liquid jet mechanically to oscillate transversely can also be realized in other ways.
  • the liquid jet could also be translated in a periodically oscillating movement.
  • the desired periodical change in direction of the liquid jet could also be attained in another way, for instance by suitable application of an electrical alternating field perpendicularly to the direction of the liquid jet 1.
  • this can be realized with the aid of an alternating air stream directed perpendicularly at the liquid jet, or by supplying highfrequency mechanical oscillations at a frequency of 100 kHz and more to the end 4 of the capillary glass tube 12.
  • FIG. 3 shows a plan view of such an arrangement. I-Iere, five capillary tubes 12a thru 12e are arranged in juxtaposition so that their liquid jets la thru 1e are directed towards record carrier 2, which is movable in a plane normal to the common plane of the jets.
  • the liquid jets can be intensity-modulated individually by control electrodes 3a thru 32, each control electrode being connected to its respective electronic control circuit (not shown). All capillary tubes 12a thru 12c are secured in holder '14 and each of them is passed through a hole in oscillating beam 13. The latter is se- It maybe difficult to dispose the recording systems illustrated in FIG. 1 sufficiently close to one another so that character columns will not be too widelyspaced apart. This difficulty can be overcome by the following system of which also two or more can be used concurof record carrier 2 so as to permit simultaneous tracing cured to two leaf springs 7a and 7b and is caused to oscillate by electromagnet 8 in the manner previously described: The other ends of the leaf springs are connected to fixed support blocks 10a and 10b.
  • liquid jets 1a thru 1e can be electrically influenced individually in a suitable way, which results in an intensity-modulation of the recording traces, as already described. If a suitable sequence of electrical pulses is applied to each of the control electrodes, five alphanumerical or other characters can thus be printed simultaneously and independently of each other on record carrier 2. Obviously, it is possible to trace in this way any desired number of character columns beside one another if a corresponding number of the recording systems shown in FIG. 1 is arranged in juxtaposition.
  • slot 15 is preferably formed in beam 13. This slot partially shields a photoelectric sensor such as photodiode 17 from lamp 16. Upon oscillation of beam 13 by magnet 8, an electrical alternating signal will thus be obtained from the photodiode, and the phase of that alternating voltage is then synchronously associated with the phase of oscillation of beam 13. Such an alternating voltage can also be obtained in a known manner with the aid of other transducers, such as piezoelectrical, capacitive, inductive or resistive transducers in place of a photoelectric sensor.
  • control electrodes 3a thru 3e are not absolutely necessary for the function of the device shown in FIG. 3, provided that a correct geometry is chosen for the control electrodes so as to insure that the electrical field at the point of drop formation of the individual liquid jets la thru 1e is determined only by the control electrode associated with the respective liquid jet.
  • the recording systems can be arranged more closely together than what is possible with the recorder illustrated in FIG. 4.
  • FIG. 5 shows part of an exemplary construction of two juxtaposed recording systems in such an arrange ment.
  • the spacing'between each of the upper control electrode portions such as plates 3f and the corresponding lower control electrode portions such as plate 3g should typically amount to about 1 mm.
  • each control electrode pair such as 3f and 3g, or 3h and Bi are conductively interconnected and coupled to a respective electronic voltage pulse generator such as 11f and 11):.
  • a respective electronic voltage pulse generator such as 11f and 11:.
  • at least the surface of thecontrol electrodes facing the liquid jet are electrically conductive and porous, and are connected to a suction means not shown in FIG. 5) for sucking away any 'of the tracing liquid striking such'porous surfaces.
  • each of the control electrode portions may be individually connected to a control pulse. generator, which implies a more complex control with two independent signals per jet, one for each electrode plate or portion.
  • control electrode pairs In the recorder shown in FIG. 5 all control electrode pairs have to be insulated from each other. With a large number of juxtaposed jets, this implies because of the suction means (not shownin FIG. 5) .practical difficul'ties such that it is impossible to build a recorder according to FIG. 5 if the liquid jets have to be spaced less than some minimum distances apart. Therefore, alternatively, as shown in FIG. 6, a single. control electrode 3j composed for instance, of two parallel plates can be substituted for the system of control electrodes of FIG. 5.
  • the liquid jets can be modulated also in this way, since according to German Offenlegungsschrift 1,950,430, the electrical control of the jet is dependent only upon the voltage difference between the liquidv jet emerging from the capillary tube and the control elec- 12k and 12m are again secured like in FIG. 3 in holder 14 and are caused to oscillate by motion of beam 13.
  • the electrodes 19k thru 19m may be enclosed within corresponding filters.
  • control electrode 3j common to all liquid jets may be connected to ground or to a constant voltage.
  • the control electrode 3j can also be connected to an electronic voltage pulse generator 23, which makes it possible collectively to influence all liquid jets.
  • the control electrode 3j can be composed of two porous electrically conductive and electrically interconnected plates which are about 20 mm wide and are disposed about 0.5 mm above and beneath the plane defined by the plane of oscillation of the liquid jets.
  • the plates of the control electrode 3j may be provided with internal passageways connected to suction pump 24.
  • these plates may be provided with a suction sleeve as in German Offenlegungsschrift 1,950,430.
  • control electrode 3j may be given other shapes, and, in particular, the distance between the plates of the control electrode may vary or be tapered in the direction of the jet.
  • the two plates of the control electrode 3j may be provided with different potentials.
  • control electrode 3j may be formed in a unitary structure which for each tracing jet has a tubular passage the axis of which coincides with the axis of the jet.
  • FIG. 7 shows such an embodiment wherein the passages have rectangular cross sections.
  • a slot-shaped porous shutter may be interposed between control electrode 3j and the record carrier 2, and this shutter in turn may have applied to it a suitable constant voltage.
  • FIG. 8 shows an embodiment, chosen by way of example, of such a recorder in which the control electrode consists of two metal sheets 3k and 3m.
  • the tracing liquid which has deposited on the inner side of the control electrode flows by gravity into grooves k and 25m and along said grooves to an outlet at the lateral end of the electrode, whereby the suction pump 24 shown in FIG. 6 can be dispensed with.
  • the recorder shown in FIGS. 3-5 and 6 in vertical position, gravity can be exploited to carry away the tracing liquid.
  • FIGS. 3 thru 8 inclusive permit an intensity modulation of the recording traces also in the case when the liquid jets are not caused to oscillate but are stationary.
  • the line in which record carrier 2 intersects the plane formed by the liquid jets does not lie at right angles to the direction of motion of the record carrier but almost coincides with said direction.
  • the liquid jets pass through control electrode 3j in parallel relation. It may rather be advantageous for certain uses if the jets are directed substantially concentrically in a common plane towards apoint in the vicinity of the record carrier 2, as is shown in plane view in FIG. 9.
  • the part of the tracing liquid intercepted by control electrode 3 is sucked away and is thus lost. This can be prevented if, for instance, in FIG. 6, the tracing liquid sucked away by suction pump 24 is returned to the supply container 20a.
  • the tracing liquid may not lose solvent, such as water, and gradually thickens, fresh solvent can be added in correct amounts.
  • This procedure may be automatized by run ning the tracing liquid through a semipermeable tube surrounded by a solution of suitable osmotic pressure. The correct solvent concentration will thus be constantly adjusted in the tracing fluid by osmosis.
  • oscillating beam 13 may be designed for instance as a hollow or double-walled structure (as shown in FIG. 10) into which capillary tubes 12 open through holes, as already hereinbefore described.
  • beam 13 is filled with a protective liquid through flexible supply conduit 27 from closed supply container 28, the protective liquid will cover nozzles 4.
  • the liquid level in the container should be so selected that the liquid certainly penetrates into beam 13 but is prevented by surface tension from escaping through apertures 26.
  • container 26 is also connected by appropriate valving (not shown) to suction pump 24 which, as shown in FIG. 6, is also utilized to suck away tracing liquid fron control electrode 3j, then automatically when the arrangement is made operative the liquid will immediately be sucked out of hollow beam 13.
  • the arrangement illustrated in FIG. 10 has the further advantage that the front wall of beam 13 can serve to shield electrically nozzles 4 from each other, it that front wall is made from conductive material and is connected to a suitable voltage.
  • the double wall of the beam at each position of the capillary tubes can be replaced by a small vertical tube secured to beam 13 and so arranged as to convey protective liquid to each nozzle 4 of a respective capillary tube 12.
  • the tracing speed of the recorders illustrated in FIGS. 3 to 8 inclusive can be in the order of 20 to I00 lines per second, and therefore it is not necessary to associate with each character position a separate electronic coding unit which produces the correct voltage pulse sequences for the tracing of the characters. If a shift register is associated with each character position, it is in fact, possible to carry out recording of all characters in a line during the time it takes the paper advance mechanism to provide the necessary line spacing.
  • digital information delivered in series form by an electronic computer can be recoded digit by digit in a central coding unit and be stored in the shift registers in such a way that a parallel relatively slow reading of all shift registers simultaneously supplies to the control electrodes in each tracing position precisely the pulse sequence that is necessary to trace the character read into the respective shift register. It may be desirable to connect a voltage amplifier between the shift register and control electrode '3 or the electrodes such as 19k. It is obvious that reading of the information from the shift registers must take place in correct time relation with the mechanical oscillations of beam 13. Such synchronization may be realized by means of the electrical signal from photodiode 17 or in another manner,
  • a liquid jet recorder for writing with an electrically conductive marking fluid on a receiving surface movable along a first path, said recorder comprising ,in combination,
  • a recorder as defined in claim 1 including a common control electrode for at least one group of said 'ets.
  • J 5 A recorder as defined in claim 1 including individual sources of supply of said tracing fluid for each of said jets, individual electrodes each associated with a corresponding one of said sources for imposing a potential on the fluid in said source.
  • a recorder as defined in claim 1 including means I for covering the opening in said nozzles with a protective liquid during a period when said fluid is not being ejected.
  • a recorder as defined in claim 8 including pump means for removing said liquid prior to ejection of said fluid from said nozzles.
  • a liquid jet recorder for pressure ejecting toward a recording surface a plurality of jets of an electrically conductive tracing fluid from corresponding nozzles, and including means for periodically varying the direction of said jets along paths substantially normal to the jet axes, electrical means for applying electrical potentials for each of said jets, and means for supplying said fluid to said nozzles from a common fluid source
  • said means for supplying comprises a plurality of tubes each connecting a corresponding one of said nozzles to said common source, each of said tubes being dimensioned in length and cross-section so that the electrical resistivity of said fluid in each of said tubes is sufficiently high to constitute an electrical buffer between said nozzles with respect to said potentials.

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  • Particle Formation And Scattering Control In Inkjet Printers (AREA)
  • Special Spraying Apparatus (AREA)
  • Ink Jet (AREA)
US00128278A 1970-04-02 1971-03-26 Liquid jet recorder Expired - Lifetime US3737914A (en)

Applications Claiming Priority (2)

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SE04528/70A SE347375B (enrdf_load_stackoverflow) 1970-04-02 1970-04-02
DE19702045617 DE2045617C2 (de) 1970-09-15 1970-09-15 Tröpfchenaufladeeinrichtung für einen Flüssigkeitsstrahlschreiber mit mehreren Flüssigkeitsstrahlerzeugungssystemen

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JP (1) JPS5523751B1 (enrdf_load_stackoverflow)
CA (1) CA944807A (enrdf_load_stackoverflow)
FR (1) FR2085784B2 (enrdf_load_stackoverflow)
GB (1) GB1347097A (enrdf_load_stackoverflow)
IT (1) IT984546B (enrdf_load_stackoverflow)
NL (1) NL175110C (enrdf_load_stackoverflow)

Cited By (32)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3832719A (en) * 1972-04-21 1974-08-27 Ibm Modified diffused ink jet printer
US3839721A (en) * 1973-06-27 1974-10-01 Ibm Device for retention of ink jet nozzle clogging and ink spraying
US3852772A (en) * 1971-09-03 1974-12-03 Recognition Equipment Inc Mechanically cycled ink jet printer
US3916421A (en) * 1973-07-02 1975-10-28 Hertz Carl H Liquid jet recorder
US3945020A (en) * 1973-10-01 1976-03-16 Siemens Aktiengesellschaft Liquid jet recorder
US3975740A (en) * 1973-10-02 1976-08-17 Siemens Aktiengesellschaft Liquid jet recorder
US4050075A (en) * 1974-10-17 1977-09-20 Hertz Carl H Ink jet method and apparatus
DE2741151A1 (de) * 1976-09-13 1978-03-16 Bell & Howell Co Tintenstrahldrucker mit ablenkbaren duesen
US4090205A (en) * 1977-04-06 1978-05-16 The Mead Corporation Apparatus and method for jet drop printing
US4122457A (en) * 1976-09-13 1978-10-24 Bell & Howell Company Ink jet printer with deflected nozzles
US4167743A (en) * 1978-01-05 1979-09-11 Beckman Instruments, Inc. Recorder pen servicing accessory
EP0004737A3 (en) * 1978-04-10 1979-10-31 Xerox Corporation Electrostatic scanning ink jet method and apparatus
US4196437A (en) * 1976-02-05 1980-04-01 Hertz Carl H Method and apparatus for forming a compound liquid jet particularly suited for ink-jet printing
WO1980000875A1 (en) * 1978-10-13 1980-05-01 Dennison Mfg Co Ink jet printing
US4228442A (en) * 1979-01-24 1980-10-14 Ncr Corporation Means for preventing drying of ink at nozzles of print heads
US4231046A (en) * 1977-11-14 1980-10-28 Sharp Kabushiki Kaisha Ink issuance orifice protection in an ink jet system printer
US4249187A (en) * 1978-04-24 1981-02-03 Bell & Howell Company Ink jet printer with deflected nozzles
US4281331A (en) * 1980-01-24 1981-07-28 Dennison Manufacturing Company Variable rate ink jet printing
WO1981003306A1 (en) * 1980-05-16 1981-11-26 Commw Scient Ind Res Org Density control of jet printing droplets
US4349828A (en) * 1980-02-04 1982-09-14 Xerox Corporation Method and apparatus for oscillating an array of marking elements
WO1982003123A1 (en) * 1981-03-09 1982-09-16 Ncr Co Dot matrix printer
US4356499A (en) * 1979-11-28 1982-10-26 Ricoh Co., Ltd. Ink-jet recording device
US4382263A (en) * 1981-04-13 1983-05-03 Xerox Corporation Method for ink jet printing where the print rate is increased by simultaneous multiline printing
US4410895A (en) * 1981-10-26 1983-10-18 Xerox Corporation Ink jet sensor method and apparatus
US4520368A (en) * 1983-08-10 1985-05-28 Xerox Corporation Ink jet printing method and apparatus
US4577197A (en) * 1985-01-17 1986-03-18 Xerox Corporation Ink jet printer droplet height sensing control
WO1987002937A1 (en) * 1985-11-18 1987-05-21 Sanders Royden C Jun Dot matrix printing and scanning
US4783977A (en) * 1984-10-29 1988-11-15 Milliken Research Corporation Apparatus for forming and interrupting fluid streams
US4856920A (en) * 1986-01-03 1989-08-15 Sanders Royden C Jun Dot matrix printing and scanning
US5412411A (en) * 1993-11-26 1995-05-02 Xerox Corporation Capping station for an ink-jet printer with immersion of printhead in ink
USRE37862E1 (en) 1985-01-31 2002-10-01 Thomas G. Hertz Method and apparatus for high resolution ink jet printing
US6605811B2 (en) * 2001-11-09 2003-08-12 Elionix Inc. Electron beam lithography system and method

Families Citing this family (2)

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US4721968A (en) * 1983-09-22 1988-01-26 Canon Kabushiki Kaisha Ink jet transparency-mode recorder
DE3341399A1 (de) * 1983-11-15 1985-05-23 Siemens AG, 1000 Berlin und 8000 München Verfahren zum erhoehen der aufloesung bei einer tintenmosaikschreibeinrichtung sowie anordnung zur durchfuehrung des verfahrens

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US3373437A (en) * 1964-03-25 1968-03-12 Richard G. Sweet Fluid droplet recorder with a plurality of jets
US3416153A (en) * 1965-10-08 1968-12-10 Hertz Ink jet recorder
US3346869A (en) * 1966-02-16 1967-10-10 Dick Co Ab Nozzle cover
US3564120A (en) * 1968-10-18 1971-02-16 Mead Corp Image construction system with arcuately scanning drop generators

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Cited By (34)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3852772A (en) * 1971-09-03 1974-12-03 Recognition Equipment Inc Mechanically cycled ink jet printer
US3832719A (en) * 1972-04-21 1974-08-27 Ibm Modified diffused ink jet printer
US3839721A (en) * 1973-06-27 1974-10-01 Ibm Device for retention of ink jet nozzle clogging and ink spraying
US3916421A (en) * 1973-07-02 1975-10-28 Hertz Carl H Liquid jet recorder
US3945020A (en) * 1973-10-01 1976-03-16 Siemens Aktiengesellschaft Liquid jet recorder
US3975740A (en) * 1973-10-02 1976-08-17 Siemens Aktiengesellschaft Liquid jet recorder
US4050075A (en) * 1974-10-17 1977-09-20 Hertz Carl H Ink jet method and apparatus
US4196437A (en) * 1976-02-05 1980-04-01 Hertz Carl H Method and apparatus for forming a compound liquid jet particularly suited for ink-jet printing
DE2741151A1 (de) * 1976-09-13 1978-03-16 Bell & Howell Co Tintenstrahldrucker mit ablenkbaren duesen
US4122457A (en) * 1976-09-13 1978-10-24 Bell & Howell Company Ink jet printer with deflected nozzles
US4090205A (en) * 1977-04-06 1978-05-16 The Mead Corporation Apparatus and method for jet drop printing
US4231046A (en) * 1977-11-14 1980-10-28 Sharp Kabushiki Kaisha Ink issuance orifice protection in an ink jet system printer
US4167743A (en) * 1978-01-05 1979-09-11 Beckman Instruments, Inc. Recorder pen servicing accessory
EP0004737A3 (en) * 1978-04-10 1979-10-31 Xerox Corporation Electrostatic scanning ink jet method and apparatus
US4249187A (en) * 1978-04-24 1981-02-03 Bell & Howell Company Ink jet printer with deflected nozzles
US4240081A (en) * 1978-10-13 1980-12-16 Dennison Manufacturing Company Ink jet printing
WO1980000875A1 (en) * 1978-10-13 1980-05-01 Dennison Mfg Co Ink jet printing
US4228442A (en) * 1979-01-24 1980-10-14 Ncr Corporation Means for preventing drying of ink at nozzles of print heads
US4356499A (en) * 1979-11-28 1982-10-26 Ricoh Co., Ltd. Ink-jet recording device
US4281331A (en) * 1980-01-24 1981-07-28 Dennison Manufacturing Company Variable rate ink jet printing
US4349828A (en) * 1980-02-04 1982-09-14 Xerox Corporation Method and apparatus for oscillating an array of marking elements
WO1981003306A1 (en) * 1980-05-16 1981-11-26 Commw Scient Ind Res Org Density control of jet printing droplets
WO1982003123A1 (en) * 1981-03-09 1982-09-16 Ncr Co Dot matrix printer
US4382263A (en) * 1981-04-13 1983-05-03 Xerox Corporation Method for ink jet printing where the print rate is increased by simultaneous multiline printing
US4410895A (en) * 1981-10-26 1983-10-18 Xerox Corporation Ink jet sensor method and apparatus
US4520368A (en) * 1983-08-10 1985-05-28 Xerox Corporation Ink jet printing method and apparatus
US4783977A (en) * 1984-10-29 1988-11-15 Milliken Research Corporation Apparatus for forming and interrupting fluid streams
US4577197A (en) * 1985-01-17 1986-03-18 Xerox Corporation Ink jet printer droplet height sensing control
USRE37862E1 (en) 1985-01-31 2002-10-01 Thomas G. Hertz Method and apparatus for high resolution ink jet printing
WO1987002937A1 (en) * 1985-11-18 1987-05-21 Sanders Royden C Jun Dot matrix printing and scanning
US4794387A (en) * 1985-11-18 1988-12-27 Sanders Royden C Jun Enhanced raster image producing system
US4856920A (en) * 1986-01-03 1989-08-15 Sanders Royden C Jun Dot matrix printing and scanning
US5412411A (en) * 1993-11-26 1995-05-02 Xerox Corporation Capping station for an ink-jet printer with immersion of printhead in ink
US6605811B2 (en) * 2001-11-09 2003-08-12 Elionix Inc. Electron beam lithography system and method

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FR2085784B2 (enrdf_load_stackoverflow) 1973-01-12
GB1347097A (en) 1974-02-13
NL175110B (nl) 1984-04-16
FR2085784A2 (enrdf_load_stackoverflow) 1971-12-31
CA944807A (en) 1974-04-02
NL175110C (nl) 1984-09-17
IT984546B (it) 1974-11-20
JPS5523751B1 (enrdf_load_stackoverflow) 1980-06-25
NL7104488A (enrdf_load_stackoverflow) 1971-10-05

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