WO1990014233A1 - Liquid jet recording process and apparatus therefore - Google Patents

Liquid jet recording process and apparatus therefore Download PDF

Info

Publication number
WO1990014233A1
WO1990014233A1 PCT/GB1990/000817 GB9000817W WO9014233A1 WO 1990014233 A1 WO1990014233 A1 WO 1990014233A1 GB 9000817 W GB9000817 W GB 9000817W WO 9014233 A1 WO9014233 A1 WO 9014233A1
Authority
WO
WIPO (PCT)
Prior art keywords
meniscus
liquid
droplet
cavity
enabling
Prior art date
Application number
PCT/GB1990/000817
Other languages
French (fr)
Inventor
Borge Riis Jensen
Original Assignee
P.A. Consulting Services Limited
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 P.A. Consulting Services Limited filed Critical P.A. Consulting Services Limited
Publication of WO1990014233A1 publication Critical patent/WO1990014233A1/en

Links

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B41PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41JTYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J2/00Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
    • B41J2/005Typewriters 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
    • B41J2/01Ink jet
    • B41J2/015Ink jet characterised by the jet generation process
    • B41J2/04Ink jet characterised by the jet generation process generating single droplets or particles on demand
    • B41J2/06Ink jet characterised by the jet generation process generating single droplets or particles on demand by electric or magnetic field
    • B41J2/065Ink jet characterised by the jet generation process generating single droplets or particles on demand by electric or magnetic field involving the preliminary making of ink protuberances

Definitions

  • Known liquid jet recording processes include so-called “drop-on-demand” recording processes in which liquid is contained in a cavity having a nozzle and a droplet separation arrangement, such as an electrostatic arrangement, is used to separate droplets from the liquid meniscus.
  • a desirable result in developing liquid jet recording processes and apparatus therefor is to achieve greater frequency of operation and simplicity of construction.
  • the present invention also provides a method of ejecting a droplet from a volume of liquid contained in a cavity having an exit orifice, the method comprising inducing pressure variations in the volume of liquid whereby to cause oscillations of the liquid meniscus at the orifice and enabling a droplet of liquid to separate from the meniscus.
  • the means for enabling droplet separation may take a variety of forms as will become apparent from the following description.
  • Figure 2 is a schematic diagram of part of the apparatus of claim 1 including a first type of droplet separation arrangement
  • Figure 5 is a schematic diagram similar to figure 2 showing a fourth type of droplet separation arrangement
  • Figure 6 is a schematic diagram similar to figure 2 showing a fifth type of droplet separation arrangement
  • the meniscus will return back and retract into the nozzle 3. It is possible by adjusting the amplitude of the signal supplied by the drive circuit 6 to get the meniscus 7 to oscillate with a considerable amplitude without breaking off and forming a droplet. This amplitude can be several times the diameter of the discharge orifice 2 and is a function of liquid parameters as well as the amplitude of the drive voltage. If the frequency of the drive signal corresponds to transducer resonances and/or resonances in the cavity and/or resonance in the liquid column in the nozzle, the meniscus can be made to oscillate at very high frequencies with very small electrical input power requirements. Oscillating frequencies of several hundred kilohertz have been observed.
  • a feed back control loop can be incorporated. Either the pressure in the recording liquid in the cavity 7 or the amplitude of the oscillating meniscus can be measured and used to regulate the amplitude of the voltage delivered from the drive circuit 6.
  • a droplet separation arrangement 8 In the region outside the discharge orifice 2 is placed a droplet separation arrangement 8.
  • this arrangement is energised, by an electronic drive circuit 9, additional energy is added to the recording medium in the oscillating meniscus causing a droplet to be discharged.
  • the transducer drive circuit 6 and the droplet separation drive circuit 9 can be synchronised to assure that the droplet separation arrangement adds the energy to the meniscus at the correct time within the oscillating cycle of the meniscus.
  • the total energy Erpot required to eject a droplet from a small orifice consists of three components:
  • E v is the energy required to overcome the viscous drag in the nozzle
  • E s is the energy required to overcome the surface tension and break the droplet of the meniscus
  • Ej ⁇ is the kinetic energy contained in the flying droplet.
  • Ep can also be adjusted to be higher than the sum of E v , E s and E] ⁇ that is the energy generated by the transducer 5 is sufficient to release a droplet from the oscillating meniscus during each cycle.
  • the droplet separation arrangement has to provide a negative energy component preventing droplets from being discharged and only allow a droplet discharge when a dot needs to be formed on the recording substrate 10. In practice however, this arrangement has been found to be more difficult to implement.
  • the recording apparatus described above has been a singe orifice arrangement. In most practical applications multi- orifice arrangements are required. Since the same drive transducer 5 and cavity 4 can be used to supply all nozzles 3 it is very simple to produce large arrays of droplet discharge orifices where the distance between individual orifices is very small.
  • droplet separation arrangement 8 can be implemented to provide the additional energy required to separate a droplet from the oscillating meniscus. Some of these are explained in figure 2 to figure 6. In all of the drawings appended hereto, like items are identified with like reference numerals.
  • Figure 6 shows an arrangement where two electrodes 20 and 21 forming a capacitor are placed in front of the orifice.
  • the ink which in this case should have a high dielectric constant , will be drawn into the capacitor causing a droplet to be released.
  • Figure 7 illustrates multi-orifice orifice liquid jet recording apparatus according to the invention.
  • a single cavity 4 is provided with an array of nozzles 3.
  • one wall of the cavity contains a transducer arrangement 5, preferably a piezoelectric transducer arrangement, connected to an electronic drive circuit 6.
  • the transducer produces oscillating pressure waves which cause each meniscus at each orifice to oscillate.
  • Reference numeral 8 denotes a droplet separation arrangement which may be any of the types mentioned above.
  • the droplet separation arrangement should be operable to discharge a droplet from a selected one of the orifices.
  • the droplet separation arrangement may comprise an array of heaters of the type shown in figure 3, one corresponding to each orifice 3. Selected ones of the heaters may be energised to eject droplets from selected ones of the orifices to produce spots at desired locations on the substrate. Any of the droplet separation arrangements described above can be adapted for multi-orifice apparatus.
  • a droplet separation arrangement comprising several individual elements may be operated by the same drive circuit, if desired.
  • the individual elements may be separately wired to the drive circuit or they may be separately addressable from the drive circuit.
  • the droplet separation arrangement is positioned outside the cavity 4. This is advantageous since it simplifies the construction of the cavity itself and enables it to be made very small. However, it is also possible to provide droplet separation means inside the cavity and one example of such an arrangement is illustrated in figure 8.
  • any type of internal droplet separation arrangement can be used in apparatus according to this invention.
  • a separation device can be provided for each orifice.
  • a single droplet separation arrangement could then be used instead of an array, and the operation of the arrangement would be timed with the standing waves to separate a droplet from the desired orifice.

Abstract

A liquid jet recording apparatus comprises a cavity (4) having at least one exit orifice (2) and means (5) for causing pressure variations within a liquid in the cavity whereby to cause the liquid meniscus at the orifice to oscillate. Means (8) are provided for enabling ejection of a liquid from the oscillating orifice.

Description

Liquid Jet Recording Process and Apparatus Therefor
The present invention relates to a liquid jet recording process. More particularly, the invention relates to a liquid jet recording process in which recording liquid (eg: ink) is caused to travel in the form of droplets onto the surface of a recording medium (eg: paper).
Known liquid jet recording processes include so-called "drop-on-demand" recording processes in which liquid is contained in a cavity having a nozzle and a droplet separation arrangement, such as an electrostatic arrangement, is used to separate droplets from the liquid meniscus.
Processes are also known in which a continuous stream of droplets is generated from a nozzle and the direction of travel of the droplets is controlled according to demand.
A desirable result in developing liquid jet recording processes and apparatus therefor is to achieve greater frequency of operation and simplicity of construction.
The present invention provides liquid jet recording apparatus comprising a cavity having at least one exit orifice, means for inducing pressure variations in a liquid in the cavity whereby to cause the liquid meniscus at the orifice to oscillate and means for enabling a droplet of liquid to separate from the meniscus.
Thus in the apparatus of the present invention, the liquid meniscus is continuously oscillated and droplets are separated from the meniscus at selected times as it oscillates. Using the apparatus of the present invention, extremely high speeds of operation have been achieved.
The present invention also provides a method of ejecting a droplet from a volume of liquid contained in a cavity having an exit orifice, the method comprising inducing pressure variations in the volume of liquid whereby to cause oscillations of the liquid meniscus at the orifice and enabling a droplet of liquid to separate from the meniscus.
The means for enabling droplet separation may take a variety of forms as will become apparent from the following description.
In order that the present invention may be more readily understood, several preferred embodiments thereof will now be described by way of example with reference to the accompanying drawings in which:
Figure 1 is a schematic diagram illustrating the basic principle of ink jet recording apparatus according to this invention;
Figure 2 is a schematic diagram of part of the apparatus of claim 1 including a first type of droplet separation arrangement;
Figure 3 is a schematic diagram similar to figure 2 showing a second type of droplet separation arrangement;
Figure 4 is a schematic diagram similar to figure 2 showing a third type of droplet separation arrangement;
Figure 5 is a schematic diagram similar to figure 2 showing a fourth type of droplet separation arrangement;
Figure 6 is a schematic diagram similar to figure 2 showing a fifth type of droplet separation arrangement;
Figure 7 is a schematic diagram showing the basic principle of multi-orifice ink jet recording apparatus according to this invention; and
Figure 8 is a schematic diagram of a part of the apparatus of figure 1 having a droplet separation arrangement within the cavity.
Referring first to figure 1 which is a diagram explaining the basic principle of the present invention, a recording liquid 1 to be discharged from a discharge orifice 2 is fed from a supply arrangement (not shown in figure 1 ) into a cavity 4 and is allowed by capillary force to flow out of a nozzle 3 forming a meniscus at the discharge orifice 2. One wall of the cavity 4 contains a transducer arrangement 5, preferably a piezoelectric device, connected to an electronic drive circuit 6. When the transducer 5 is energised with an oscillating signal by the drive circuit 6, oscillating pressure waves can be generated in the cavity 4. These pressure waves will during the positive cycle cause the meniscus 7 formed by the recording liquid at the discharge orifice 2 to move outwards.
During the negative cycle of the pressure waves, the meniscus will return back and retract into the nozzle 3. It is possible by adjusting the amplitude of the signal supplied by the drive circuit 6 to get the meniscus 7 to oscillate with a considerable amplitude without breaking off and forming a droplet. This amplitude can be several times the diameter of the discharge orifice 2 and is a function of liquid parameters as well as the amplitude of the drive voltage. If the frequency of the drive signal corresponds to transducer resonances and/or resonances in the cavity and/or resonance in the liquid column in the nozzle, the meniscus can be made to oscillate at very high frequencies with very small electrical input power requirements. Oscillating frequencies of several hundred kilohertz have been observed.
In order to stabilise and control the oscillation amplitude of the meniscus a feed back control loop can be incorporated. Either the pressure in the recording liquid in the cavity 7 or the amplitude of the oscillating meniscus can be measured and used to regulate the amplitude of the voltage delivered from the drive circuit 6.
In the region outside the discharge orifice 2 is placed a droplet separation arrangement 8. When this arrangement is energised, by an electronic drive circuit 9, additional energy is added to the recording medium in the oscillating meniscus causing a droplet to be discharged. The transducer drive circuit 6 and the droplet separation drive circuit 9 can be synchronised to assure that the droplet separation arrangement adds the energy to the meniscus at the correct time within the oscillating cycle of the meniscus.
Once a droplet has been separated from the oscillating meniscus it will pass through the droplet separating arrangement and deposit on the recording substrate 10 to form a dot.
The total energy Erpot required to eject a droplet from a small orifice consists of three components:
Figure imgf000007_0001
where
Ev : is the energy required to overcome the viscous drag in the nozzle
Es : is the energy required to overcome the surface tension and break the droplet of the meniscus
Ejς : is the kinetic energy contained in the flying droplet.
In operation the pressure waves generated in the cavity 4 by the transducer 5 are adjusted to provide an energy input Ep to the nozzle 3 of:
E Ev + Es
That is, Ep is not high enough to separate and move the droplets away from the oscillating meniscus. Only the droplet separation arrangement 8 is able to provide this additional energy component to the oscillating meniscus and discharge a droplet.
In principle Ep can also be adjusted to be higher than the sum of Ev, Es and E]ζ that is the energy generated by the transducer 5 is sufficient to release a droplet from the oscillating meniscus during each cycle. In this case the droplet separation arrangement has to provide a negative energy component preventing droplets from being discharged and only allow a droplet discharge when a dot needs to be formed on the recording substrate 10. In practice however, this arrangement has been found to be more difficult to implement.
For simplicity reasons the recording apparatus described above has been a singe orifice arrangement. In most practical applications multi- orifice arrangements are required. Since the same drive transducer 5 and cavity 4 can be used to supply all nozzles 3 it is very simple to produce large arrays of droplet discharge orifices where the distance between individual orifices is very small.
There are several different ways the droplet separation arrangement 8 can be implemented to provide the additional energy required to separate a droplet from the oscillating meniscus. Some of these are explained in figure 2 to figure 6. In all of the drawings appended hereto, like items are identified with like reference numerals.
Figure 2 shows an arrangement in which a light emitting device 11 such as a laser device is used to provide a thermal energy pulse to the oscillating meniscus 7. Where the device is a laser, the energy in the laser beam 12 is absorbed in the recording liquid and causes a local heating. As a result the surface tension drops and reduces the energy threshold at which the droplet will be released from the meniscus. It is .also possible with a short heat pulse to boil the ink locally. This phase change produces a small bubble which can separate the droplet from the meniscus.
Figure 3 shows an arrangement in which a small heating element 13 is situated just outside the orifice. When energised by a drive circuit 14, the heating element 13 provides a thermal energy pulse which can separate the droplet from the meniscus in the same way as described above.
Figure 4 shows an arrangement where two electrodes 15 and 16 are situated on opposite sides of the orifice. The electrode 16 is connected to a ground potential and the other electrode 15 is connected to a voltage drive circuit 17. When a sufficient high electrical field is applied across the electrodes and thus across the oscillating meniscus a droplet can be ejected.
Two possible ways in which a droplet can be ejected with the arrangement of figure 4 are as follows: A high electric field may be applied across the electrodes sufficient to cause a spark to be generated. This would cause local heating of the liquid leading to droplet separation in the manner described above. Alternatively, if the ink is a polar liquid, the electrodes can be used to generate an electric field in the region of the meniscus which will impart extra kinetic energy to the field at the meniscus leading to droplet separation.
Figure 5 shows an arrangement in which an electrode 18 is placed at a distance away from the orifice which is longer than the amplitude of the oscillating meniscus. The ink is connected to ground potential and when an electrical voltage applied from a drive circuit 19 is connected to the electrode 18 an electrostatic force can be generated pulling a droplet away from the meniscus.
Figure 6 shows an arrangement where two electrodes 20 and 21 forming a capacitor are placed in front of the orifice. When an electrical field is placed across the capacitor the ink, which in this case should have a high dielectric constant , will be drawn into the capacitor causing a droplet to be released.
Figure 7 illustrates multi-orifice orifice liquid jet recording apparatus according to the invention. In this arrangement a single cavity 4 is provided with an array of nozzles 3. As with figure 1 , one wall of the cavity contains a transducer arrangement 5, preferably a piezoelectric transducer arrangement, connected to an electronic drive circuit 6. The transducer produces oscillating pressure waves which cause each meniscus at each orifice to oscillate. Reference numeral 8 denotes a droplet separation arrangement which may be any of the types mentioned above. Preferably, the droplet separation arrangement should be operable to discharge a droplet from a selected one of the orifices. For example, the droplet separation arrangement may comprise an array of heaters of the type shown in figure 3, one corresponding to each orifice 3. Selected ones of the heaters may be energised to eject droplets from selected ones of the orifices to produce spots at desired locations on the substrate. Any of the droplet separation arrangements described above can be adapted for multi-orifice apparatus.
In the arrangement of figure 7 the cavity has an inlet and an outlet connected to the supply arrangement so that liquid can be continuously circulated through the cavity to prevent the formation of air bubbles. This feature may be included in any of the arrangements described above.
A droplet separation arrangement comprising several individual elements may be operated by the same drive circuit, if desired. The individual elements may be separately wired to the drive circuit or they may be separately addressable from the drive circuit.
In all of the arrangements described above the droplet separation arrangement is positioned outside the cavity 4. This is advantageous since it simplifies the construction of the cavity itself and enables it to be made very small. However, it is also possible to provide droplet separation means inside the cavity and one example of such an arrangement is illustrated in figure 8.
In the arrangement of figure 8 a resistor 24 is positioned inside a nozzle. When energised by a drive circuit 23, the resistor provides a thermal energy pulse which can separate a droplet from the meniscus in the manner described above.
Any type of internal droplet separation arrangement can be used in apparatus according to this invention. In a single-cavity-multi-orifice arrangement a separation device can be provided for each orifice.
Alternatively it would be possible to generate a travelling pressure wave in the cavity causing the meniscuses to oscillate at different times, or asynchronously. A single droplet separation arrangement could then be used instead of an array, and the operation of the arrangement would be timed with the standing waves to separate a droplet from the desired orifice.
Figure imgf000011_0001

Claims

CLAIMS:
1. A liquid jet recording apparatus comprising a cavity having at least one orifice, means for inducing pressure variations in a liquid in the cavity whereby to cause the liquid meniscus at the orifice to oscillate and means for enabling a droplet of liquid to separate from the meniscus.
2. Apparatus as claimed in claim 1 in which the means for enabling droplet separation are arranged to supply additional energy to liquid at the meniscus.
3. Apparatus as claimed in claim 1 or 2 in which said means for inducing pressure variations comprise a piezoelectric transducer.
4. Apparatus as claimed in claim 1, 2 or 3 in which the means for enabling droplet separation comprise a light emitting device for providing a thermal energy pulse to the oscillating meniscus.
5. Apparatus as claimed in claim 1, 2 or 3 in which the means for enabling droplet separation comprise a heating device.
6. Apparatus as claimed in claim 1", 2 or 3 in which the means for enabling droplet separation comprise a pair of electrodes arranged to produce an electric field across the meniscus.
7. Apparatus as claimed in claim 1, 2 or 3 in which the means for enabling droplet separation comprise an electrode arranged to generate electrostatic force for pulling a droplet away from the meniscus.
8. Apparatus as claimed in claim 1, 2 or 3 in which the means for enabling droplet separation are arranged to form a capacitor for attracting a droplet away from the meniscus.
9. Apparatus as claimed in any preceding claim in which the means enabling droplet separation are arranged outside the cavity.
10. Apparatus as claimed in any of claims 1 to 6 in which the means enabling droplet separation are arranged inside the cavity.
11. Apparatus as claimed in any preceding claim in which the cavity includes a nozzle terminating in said exit orifice along which the liquid may travel by capillary action.
12. Apparatus as claimed in any preceding claim including means for monitoring the pressure in the cavity or the amplitude of the meniscus and means for regulating the pressure variations in the cavity in response to said monitoring means.
13. Apparatus as claimed in any preceding claim in which the cavity has an array of exit orifices the meniscuses of which are all caused to oscillate by the same means.
14. Apparatus as claimed in claim 13 in which the droplet separation arrangement is operable to enable droplet separation from a selected one or selected ones of said orifices.
15. Apparatus as claimed in any preceding claim in which the pressure variations in the liquid are sufficient to enable droplet separation at the orifice and said means for enabling droplet separation are arranged to prevent droplet separation except when required.
16. A method of ejecting a droplet from a volume of liquid in a cavity having an exit orifice, the method comprising inducing pressure variations in the volume of liquid whereby to cause oscillations of the liquid meniscus at the orifice and enabling a droplet of liquid to separate from the meniscus.
17. A method as claimed in claim 16 in which the pressure variations are sufficient to cause a droplet of liquid to separate from the meniscus and droplet formation is prevented except when required.
18. A method as claimed in claim 16 in which droplet separation is enabled by supplying additional energy to the liquid at the meniscus.
19. A method as claimed in claim 16, 17 or 18 in which the pressure variations are induced by a transducer arrangement at a frequency corresponding to a resonant frequency of the transducer arrangement and/or the cavity and/or a column of liquid adjacent the meniscus.
20. A method as claimed in any of claims 16 to 19 for use with a cavity having a plurality of orifices in which travelling pressure waves are generated in the cavity whereby to cause the meniscuses at the respective orifices to oscillate asynchronously.
PCT/GB1990/000817 1989-05-26 1990-05-25 Liquid jet recording process and apparatus therefore WO1990014233A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB898912245A GB8912245D0 (en) 1989-05-26 1989-05-26 Liquid jet recording process
GB8912245.1 1989-05-26

Publications (1)

Publication Number Publication Date
WO1990014233A1 true WO1990014233A1 (en) 1990-11-29

Family

ID=10657468

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/GB1990/000817 WO1990014233A1 (en) 1989-05-26 1990-05-25 Liquid jet recording process and apparatus therefore

Country Status (2)

Country Link
GB (1) GB8912245D0 (en)
WO (1) WO1990014233A1 (en)

Cited By (65)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1996032267A1 (en) * 1995-04-12 1996-10-17 Eastman Kodak Company Constructions and manufacturing processes for thermally activated print heads
WO1996032725A2 (en) * 1995-04-12 1996-10-17 Eastman Kodak Company Color office printer with a high capacity digital page image store
WO1996032808A1 (en) * 1995-04-12 1996-10-17 Eastman Kodak Company Fax machine with concurrent drop selection and drop separation ink jet printing
WO1996032274A1 (en) * 1995-04-12 1996-10-17 Eastman Kodak Company Heather structure and fabrication process for monolithic print heads
WO1996032264A1 (en) * 1995-04-12 1996-10-17 Eastman Kodak Company Block fault tolerance in integrated printing heads
WO1996032278A1 (en) * 1995-04-12 1996-10-17 Eastman Kodak Company Printing method and apparatus employing electrostatic drop separation
WO1996032269A1 (en) * 1995-04-12 1996-10-17 Eastman Kodak Company Heater power compensation for thermal lag in thermal printing systems
WO1996032273A1 (en) * 1995-04-12 1996-10-17 Eastman Kodak Company Method and apparatus for accurate control of temperature pulses in printing heads
WO1996032259A2 (en) * 1995-04-12 1996-10-17 Eastman Kodak Company Fault tolerance in high volume printing presses
WO1996032262A1 (en) * 1995-04-12 1996-10-17 Eastman Kodak Company A color plotter using concurrent drop selection and drop separation ink jet printing technology
WO1996032289A1 (en) * 1995-04-12 1996-10-17 Eastman Kodak Company Apparatus for printing multiple drop sizes and fabrication thereof
WO1996032270A1 (en) * 1995-04-12 1996-10-17 Eastman Kodak Company Integrated drive circuitry in drop on demand print heads
WO1996032265A1 (en) * 1995-04-12 1996-10-17 Eastman Kodak Company A color video printer and a photocd system with integrated printer
WO1996032268A1 (en) * 1995-04-12 1996-10-17 Eastman Kodak Company Data distribution in monolithic print heads
WO1996032283A1 (en) * 1995-04-12 1996-10-17 Eastman Kodak Company Monolithic print head structure and a manufacturing process therefor using anisotropic wet etching
WO1996032281A2 (en) * 1995-04-12 1996-10-17 Eastman Kodak Company Nozzle placement in monolithic drop-on-demand print heads
WO1996032288A1 (en) * 1995-04-12 1996-10-17 Eastman Kodak Company Four level ink set for bi-level color printing
WO1996032266A1 (en) * 1995-04-12 1996-10-17 Eastman Kodak Company Detection of faulty actuators in printing heads
WO1996032263A1 (en) * 1995-04-12 1996-10-17 Eastman Kodak Company Nozzle duplication for fault tolerance in integrated printing heads
WO1996032260A1 (en) * 1995-04-12 1996-10-17 Eastman Kodak Company A notebook computer with integrated concurrent drop selection and drop separation color printing system
WO1996032284A1 (en) * 1995-04-12 1996-10-17 Eastman Kodak Company Monolithic printing heads and manufacturing processes therefor
WO1996032271A1 (en) * 1995-04-12 1996-10-17 Eastman Kodak Company Heater power compensation for printing load in thermal printing systems
WO1996032282A1 (en) * 1995-04-12 1996-10-17 Eastman Kodak Company A high speed digital fabric printer
WO1996032276A1 (en) * 1995-04-12 1996-10-17 Eastman Kodak Company Integrated four color print heads
WO1996032272A1 (en) * 1995-04-12 1996-10-17 Eastman Kodak Company Page image and fault tolerance control apparatus for printing systems
WO1996032279A1 (en) * 1995-04-12 1996-10-17 Eastman Kodak Company A liquid ink printing apparatus and system
WO1996032280A1 (en) * 1995-04-12 1996-10-17 Eastman Kodak Company Power supply connection for monolithic print heads
WO1996032286A2 (en) * 1995-04-12 1996-10-17 Eastman Kodak Company A nozzle clearing procedure for liquid ink printing
WO1996032809A1 (en) * 1995-04-12 1996-10-17 Eastman Kodak Company A color photocopier using a drop on demand ink jet printing system
WO1996032261A1 (en) * 1995-04-12 1996-10-17 Eastman Kodak Company A portable printer using a concurrent drop selection and drop separation printing system
WO1996032277A1 (en) * 1995-04-12 1996-10-17 Eastman Kodak Company Coincident drop selection, drop separation printing method and system
WO1996032285A1 (en) * 1995-04-12 1996-10-17 Eastman Kodak Company A self-aligned construction and manufacturing process for monolithic print heads
US5781202A (en) * 1995-04-12 1998-07-14 Eastman Kodak Company Fax machine with concurrent drop selection and drop separation ink jet printing
US5796416A (en) * 1995-04-12 1998-08-18 Eastman Kodak Company Nozzle placement in monolithic drop-on-demand print heads
US5796418A (en) * 1995-04-12 1998-08-18 Eastman Kodak Company Page image and fault tolerance control apparatus for printing systems
US5801739A (en) * 1995-04-12 1998-09-01 Eastman Kodak Company High speed digital fabric printer
US5808639A (en) * 1995-04-12 1998-09-15 Eastman Kodak Company Nozzle clearing procedure for liquid ink printing
US5812162A (en) * 1995-04-12 1998-09-22 Eastman Kodak Company Power supply connection for monolithic print heads
US5815179A (en) * 1995-04-12 1998-09-29 Eastman Kodak Company Block fault tolerance in integrated printing heads
US5825385A (en) * 1995-04-12 1998-10-20 Eastman Kodak Company Constructions and manufacturing processes for thermally activated print heads
US5838339A (en) * 1995-04-12 1998-11-17 Eastman Kodak Company Data distribution in monolithic print heads
US5841449A (en) * 1995-04-12 1998-11-24 Eastman Kodak Company Heater power compensation for printing load in thermal printing systems
US5850241A (en) * 1995-04-12 1998-12-15 Eastman Kodak Company Monolithic print head structure and a manufacturing process therefor using anisotropic wet etching
US5856836A (en) * 1995-04-12 1999-01-05 Eastman Kodak Company Coincident drop selection, drop separation printing method and system
US5859652A (en) * 1995-04-12 1999-01-12 Eastman Kodak Company Color video printer and a photo CD system with integrated printer
US5864351A (en) * 1995-04-12 1999-01-26 Eastman Kodak Company Heater power compensation for thermal lag in thermal printing systems
US5880759A (en) * 1995-04-12 1999-03-09 Eastman Kodak Company Liquid ink printing apparatus and system
US5892524A (en) * 1995-04-12 1999-04-06 Eastman Kodak Company Apparatus for printing multiple drop sizes and fabrication thereof
US5905517A (en) * 1995-04-12 1999-05-18 Eastman Kodak Company Heater structure and fabrication process for monolithic print heads
US5914737A (en) * 1995-04-12 1999-06-22 Eastman Kodak Company Color printer having concurrent drop selection and drop separation, the printer being adapted for connection to a computer
US5920331A (en) * 1995-04-12 1999-07-06 Eastman Kodak Company Method and apparatus for accurate control of temperature pulses in printing heads
US5984446A (en) * 1995-04-12 1999-11-16 Eastman Kodak Company Color office printer with a high capacity digital page image store
US6002847A (en) * 1996-04-10 1999-12-14 Eastman Kodak Company High capacity compressed document image storage for digital color printers
US6012799A (en) * 1995-04-12 2000-01-11 Eastman Kodak Company Multicolor, drop on demand, liquid ink printer with monolithic print head
EP0933212A3 (en) * 1998-02-03 2000-01-26 Eastman Kodak Company Image forming system and method
US6030072A (en) * 1995-04-12 2000-02-29 Eastman Kodak Company Fault tolerance in high volume printing presses
US6045710A (en) * 1995-04-12 2000-04-04 Silverbrook; Kia Self-aligned construction and manufacturing process for monolithic print heads
US6126846A (en) * 1995-10-30 2000-10-03 Eastman Kodak Company Print head constructions for reduced electrostatic interaction between printed droplets
US6217155B1 (en) 1995-10-30 2001-04-17 Eastman Kodak Company Construction and manufacturing process for drop on demand print heads with nozzle heaters
US6250740B1 (en) 1998-12-23 2001-06-26 Eastman Kodak Company Pagewidth image forming system and method
EP1116586A1 (en) * 2000-01-11 2001-07-18 Eastman Kodak Company Assisted drop-on-demand inkjet printer
EP0765242B1 (en) * 1995-04-12 2002-03-06 Eastman Kodak Company Pressurizable liquid ink cartridge for coincident forces printers
WO2005077547A1 (en) * 2004-02-13 2005-08-25 Chempilots A/S A method for dispensing viscous materials
WO2019011672A1 (en) * 2017-07-12 2019-01-17 Mycronic AB Jetting devices with energy output devices and methods of controlling same
CN110914063A (en) * 2017-07-12 2020-03-24 迈康尼股份公司 Jet device with acoustic transducer and control method thereof

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4502054A (en) * 1981-07-10 1985-02-26 Ing. C. Olivetti & C., S.P.A. Selective ink-jet printing device
US4697195A (en) * 1985-09-16 1987-09-29 Xerox Corporation Nozzleless liquid droplet ejectors
JPS62240559A (en) * 1986-04-14 1987-10-21 Toshiba Corp Ink jet recorder
EP0243117A2 (en) * 1986-04-17 1987-10-28 Xerox Corporation Spatially addressable capillary wave droplet ejectors

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4502054A (en) * 1981-07-10 1985-02-26 Ing. C. Olivetti & C., S.P.A. Selective ink-jet printing device
US4697195A (en) * 1985-09-16 1987-09-29 Xerox Corporation Nozzleless liquid droplet ejectors
JPS62240559A (en) * 1986-04-14 1987-10-21 Toshiba Corp Ink jet recorder
EP0243117A2 (en) * 1986-04-17 1987-10-28 Xerox Corporation Spatially addressable capillary wave droplet ejectors

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
IBM TECHNICAL DISCLOSURE BULLETIN. vol. 13, no. 5, October 1970, NEW YORK US pages 1131 - 1132; E.C. Greanias: "Hydraulic-electrostatic printer." see the whole document *
PATENT ABSTRACTS OF JAPAN vol. 12, no. 113 (M-683)(2960) 09 April 1988, & JP-A-62 240559 (T. ONO) 21 October 1987, see the whole document *

Cited By (79)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5796418A (en) * 1995-04-12 1998-08-18 Eastman Kodak Company Page image and fault tolerance control apparatus for printing systems
WO1996032281A3 (en) * 1995-04-12 1996-11-14 Eastman Kodak Co Nozzle placement in monolithic drop-on-demand print heads
WO1996032808A1 (en) * 1995-04-12 1996-10-17 Eastman Kodak Company Fax machine with concurrent drop selection and drop separation ink jet printing
WO1996032274A1 (en) * 1995-04-12 1996-10-17 Eastman Kodak Company Heather structure and fabrication process for monolithic print heads
WO1996032264A1 (en) * 1995-04-12 1996-10-17 Eastman Kodak Company Block fault tolerance in integrated printing heads
WO1996032278A1 (en) * 1995-04-12 1996-10-17 Eastman Kodak Company Printing method and apparatus employing electrostatic drop separation
WO1996032269A1 (en) * 1995-04-12 1996-10-17 Eastman Kodak Company Heater power compensation for thermal lag in thermal printing systems
WO1996032273A1 (en) * 1995-04-12 1996-10-17 Eastman Kodak Company Method and apparatus for accurate control of temperature pulses in printing heads
WO1996032259A2 (en) * 1995-04-12 1996-10-17 Eastman Kodak Company Fault tolerance in high volume printing presses
WO1996032262A1 (en) * 1995-04-12 1996-10-17 Eastman Kodak Company A color plotter using concurrent drop selection and drop separation ink jet printing technology
WO1996032289A1 (en) * 1995-04-12 1996-10-17 Eastman Kodak Company Apparatus for printing multiple drop sizes and fabrication thereof
WO1996032267A1 (en) * 1995-04-12 1996-10-17 Eastman Kodak Company Constructions and manufacturing processes for thermally activated print heads
WO1996032265A1 (en) * 1995-04-12 1996-10-17 Eastman Kodak Company A color video printer and a photocd system with integrated printer
WO1996032268A1 (en) * 1995-04-12 1996-10-17 Eastman Kodak Company Data distribution in monolithic print heads
WO1996032283A1 (en) * 1995-04-12 1996-10-17 Eastman Kodak Company Monolithic print head structure and a manufacturing process therefor using anisotropic wet etching
WO1996032281A2 (en) * 1995-04-12 1996-10-17 Eastman Kodak Company Nozzle placement in monolithic drop-on-demand print heads
WO1996032288A1 (en) * 1995-04-12 1996-10-17 Eastman Kodak Company Four level ink set for bi-level color printing
WO1996032266A1 (en) * 1995-04-12 1996-10-17 Eastman Kodak Company Detection of faulty actuators in printing heads
WO1996032263A1 (en) * 1995-04-12 1996-10-17 Eastman Kodak Company Nozzle duplication for fault tolerance in integrated printing heads
WO1996032260A1 (en) * 1995-04-12 1996-10-17 Eastman Kodak Company A notebook computer with integrated concurrent drop selection and drop separation color printing system
WO1996032284A1 (en) * 1995-04-12 1996-10-17 Eastman Kodak Company Monolithic printing heads and manufacturing processes therefor
WO1996032271A1 (en) * 1995-04-12 1996-10-17 Eastman Kodak Company Heater power compensation for printing load in thermal printing systems
WO1996032282A1 (en) * 1995-04-12 1996-10-17 Eastman Kodak Company A high speed digital fabric printer
WO1996032276A1 (en) * 1995-04-12 1996-10-17 Eastman Kodak Company Integrated four color print heads
WO1996032272A1 (en) * 1995-04-12 1996-10-17 Eastman Kodak Company Page image and fault tolerance control apparatus for printing systems
WO1996032279A1 (en) * 1995-04-12 1996-10-17 Eastman Kodak Company A liquid ink printing apparatus and system
WO1996032280A1 (en) * 1995-04-12 1996-10-17 Eastman Kodak Company Power supply connection for monolithic print heads
WO1996032286A2 (en) * 1995-04-12 1996-10-17 Eastman Kodak Company A nozzle clearing procedure for liquid ink printing
WO1996032809A1 (en) * 1995-04-12 1996-10-17 Eastman Kodak Company A color photocopier using a drop on demand ink jet printing system
WO1996032261A1 (en) * 1995-04-12 1996-10-17 Eastman Kodak Company A portable printer using a concurrent drop selection and drop separation printing system
WO1996032277A1 (en) * 1995-04-12 1996-10-17 Eastman Kodak Company Coincident drop selection, drop separation printing method and system
WO1996032285A1 (en) * 1995-04-12 1996-10-17 Eastman Kodak Company A self-aligned construction and manufacturing process for monolithic print heads
WO1996032286A3 (en) * 1995-04-12 1996-11-14 Eastman Kodak Co A nozzle clearing procedure for liquid ink printing
US5808639A (en) * 1995-04-12 1998-09-15 Eastman Kodak Company Nozzle clearing procedure for liquid ink printing
WO1996032259A3 (en) * 1995-04-12 1996-11-14 Eastman Kodak Co Fault tolerance in high volume printing presses
WO1996032725A3 (en) * 1995-04-12 1997-06-05 Eastman Kodak Co Color office printer with a high capacity digital page image store
US5781202A (en) * 1995-04-12 1998-07-14 Eastman Kodak Company Fax machine with concurrent drop selection and drop separation ink jet printing
US5796416A (en) * 1995-04-12 1998-08-18 Eastman Kodak Company Nozzle placement in monolithic drop-on-demand print heads
WO1996032270A1 (en) * 1995-04-12 1996-10-17 Eastman Kodak Company Integrated drive circuitry in drop on demand print heads
EP0765242B1 (en) * 1995-04-12 2002-03-06 Eastman Kodak Company Pressurizable liquid ink cartridge for coincident forces printers
WO1996032725A2 (en) * 1995-04-12 1996-10-17 Eastman Kodak Company Color office printer with a high capacity digital page image store
US5812162A (en) * 1995-04-12 1998-09-22 Eastman Kodak Company Power supply connection for monolithic print heads
US5815179A (en) * 1995-04-12 1998-09-29 Eastman Kodak Company Block fault tolerance in integrated printing heads
US5815178A (en) * 1995-04-12 1998-09-29 Eastman Kodak Company Printing method and apparatus employing electrostatic drop separation
US5825385A (en) * 1995-04-12 1998-10-20 Eastman Kodak Company Constructions and manufacturing processes for thermally activated print heads
US5838339A (en) * 1995-04-12 1998-11-17 Eastman Kodak Company Data distribution in monolithic print heads
US5841449A (en) * 1995-04-12 1998-11-24 Eastman Kodak Company Heater power compensation for printing load in thermal printing systems
US5850241A (en) * 1995-04-12 1998-12-15 Eastman Kodak Company Monolithic print head structure and a manufacturing process therefor using anisotropic wet etching
US5856836A (en) * 1995-04-12 1999-01-05 Eastman Kodak Company Coincident drop selection, drop separation printing method and system
US5859652A (en) * 1995-04-12 1999-01-12 Eastman Kodak Company Color video printer and a photo CD system with integrated printer
US5864351A (en) * 1995-04-12 1999-01-26 Eastman Kodak Company Heater power compensation for thermal lag in thermal printing systems
US5880759A (en) * 1995-04-12 1999-03-09 Eastman Kodak Company Liquid ink printing apparatus and system
US5892524A (en) * 1995-04-12 1999-04-06 Eastman Kodak Company Apparatus for printing multiple drop sizes and fabrication thereof
US5905517A (en) * 1995-04-12 1999-05-18 Eastman Kodak Company Heater structure and fabrication process for monolithic print heads
US5914737A (en) * 1995-04-12 1999-06-22 Eastman Kodak Company Color printer having concurrent drop selection and drop separation, the printer being adapted for connection to a computer
US5920331A (en) * 1995-04-12 1999-07-06 Eastman Kodak Company Method and apparatus for accurate control of temperature pulses in printing heads
EP0890436A3 (en) * 1995-04-12 1999-07-28 Eastman Kodak Company A liquid ink printing apparatus and system
US5984446A (en) * 1995-04-12 1999-11-16 Eastman Kodak Company Color office printer with a high capacity digital page image store
US6012799A (en) * 1995-04-12 2000-01-11 Eastman Kodak Company Multicolor, drop on demand, liquid ink printer with monolithic print head
US6030072A (en) * 1995-04-12 2000-02-29 Eastman Kodak Company Fault tolerance in high volume printing presses
US6045710A (en) * 1995-04-12 2000-04-04 Silverbrook; Kia Self-aligned construction and manufacturing process for monolithic print heads
US5801739A (en) * 1995-04-12 1998-09-01 Eastman Kodak Company High speed digital fabric printer
US6126846A (en) * 1995-10-30 2000-10-03 Eastman Kodak Company Print head constructions for reduced electrostatic interaction between printed droplets
US6217155B1 (en) 1995-10-30 2001-04-17 Eastman Kodak Company Construction and manufacturing process for drop on demand print heads with nozzle heaters
US6002847A (en) * 1996-04-10 1999-12-14 Eastman Kodak Company High capacity compressed document image storage for digital color printers
EP0933212A3 (en) * 1998-02-03 2000-01-26 Eastman Kodak Company Image forming system and method
US6126270A (en) * 1998-02-03 2000-10-03 Eastman Kodak Company Image forming system and method
US6250740B1 (en) 1998-12-23 2001-06-26 Eastman Kodak Company Pagewidth image forming system and method
EP1116586A1 (en) * 2000-01-11 2001-07-18 Eastman Kodak Company Assisted drop-on-demand inkjet printer
US6527357B2 (en) 2000-01-11 2003-03-04 Eastman Kodak Company Assisted drop-on-demand inkjet printer
WO2005077547A1 (en) * 2004-02-13 2005-08-25 Chempilots A/S A method for dispensing viscous materials
KR102537372B1 (en) * 2017-07-12 2023-05-26 마이크로닉 아베 Injection devices with energy output devices and control methods thereof
WO2019011672A1 (en) * 2017-07-12 2019-01-17 Mycronic AB Jetting devices with energy output devices and methods of controlling same
KR20200028986A (en) * 2017-07-12 2020-03-17 마이크로닉 아베 Injection devices with energy output devices and control methods thereof
CN110913998A (en) * 2017-07-12 2020-03-24 迈康尼股份公司 Injection device with energy output device and control method thereof
CN110914063A (en) * 2017-07-12 2020-03-24 迈康尼股份公司 Jet device with acoustic transducer and control method thereof
JP2020526387A (en) * 2017-07-12 2020-08-31 マイクロニック アクティエボラーグ Injection device with energy output device and its control method
US11040531B2 (en) 2017-07-12 2021-06-22 Mycronic AB Jetting devices with energy output devices and methods of controlling same
US11065868B2 (en) 2017-07-12 2021-07-20 Mycronic AB Jetting devices with acoustic transducers and methods of controlling same

Also Published As

Publication number Publication date
GB8912245D0 (en) 1989-07-12

Similar Documents

Publication Publication Date Title
WO1990014233A1 (en) Liquid jet recording process and apparatus therefore
JP2842320B2 (en) Droplet ejection device and droplet ejection method
US4719476A (en) Spatially addressing capillary wave droplet ejectors and the like
US4719480A (en) Spatial stablization of standing capillary surface waves
US3893623A (en) Fluid jet deflection by modulation and coanda selection
US7777395B2 (en) Continuous drop emitter with reduced stimulation crosstalk
US5305016A (en) Traveling wave ink jet printer with drop-on-demand droplets
JPH0684071B2 (en) Printer head for ink jet printer
US9162454B2 (en) Printhead including acoustic dampening structure
JP2708769B2 (en) Liquid jet recording head
US8714676B2 (en) Drop formation with reduced stimulation crosstalk
US6048051A (en) Ink-jet printing method and ink-jet printing apparatus using dielectric migration force
JP2793593B2 (en) Liquid jet recording head
JP2713721B2 (en) Liquid jet recording method
US20140307029A1 (en) Printhead including tuned liquid channel manifold
JPH0664161A (en) Ink particle formation in ink jet printer
US6511157B1 (en) Ink jet printerhead with a plurality of nozzles and two distinct groups of filters
JP2716722B2 (en) Liquid jet recording head
US8684483B2 (en) Drop formation with reduced stimulation crosstalk
JP2002144557A (en) Method for driving ink-jet head
JP2763539B2 (en) Liquid jet recording head
JP2651190B2 (en) Liquid jet recording method
US9168740B2 (en) Printhead including acoustic dampening structure
JP2735121B2 (en) Liquid jet recording head
JPH1058673A (en) Ink jet recording head

Legal Events

Date Code Title Description
AK Designated states

Kind code of ref document: A1

Designated state(s): JP US

AL Designated countries for regional patents

Kind code of ref document: A1

Designated state(s): AT BE CH DE DK ES FR GB IT LU NL SE