EP0760286A1 - Verfahren und Apparat zum Steuern des Tintennachfüllens eines Tintenstrahldruckkopfes - Google Patents

Verfahren und Apparat zum Steuern des Tintennachfüllens eines Tintenstrahldruckkopfes Download PDF

Info

Publication number
EP0760286A1
EP0760286A1 EP95309124A EP95309124A EP0760286A1 EP 0760286 A1 EP0760286 A1 EP 0760286A1 EP 95309124 A EP95309124 A EP 95309124A EP 95309124 A EP95309124 A EP 95309124A EP 0760286 A1 EP0760286 A1 EP 0760286A1
Authority
EP
European Patent Office
Prior art keywords
ink
nozzle
channel
chamber
flow
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.)
Withdrawn
Application number
EP95309124A
Other languages
English (en)
French (fr)
Inventor
Kit Baughman
Paul H. Mcclelland
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.)
HP Inc
Original Assignee
Hewlett Packard Co
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 Hewlett Packard Co filed Critical Hewlett Packard Co
Publication of EP0760286A1 publication Critical patent/EP0760286A1/de
Withdrawn legal-status Critical Current

Links

Images

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
    • B41J2/015—Ink jet characterised by the jet generation process
    • B41J2/04—Ink jet characterised by the jet generation process generating single droplets or particles on demand
    • B41J2/045—Ink jet characterised by the jet generation process generating single droplets or particles on demand by pressure, e.g. electromechanical transducers
    • B41J2/055—Devices for absorbing or preventing back-pressure

Definitions

  • This invention relates generally to inkjet printhead nozzle structures and methods and apparatus for controlling ink flow within a nozzle. More particularly, this invention relates to active methods and corresponding apparatus for controlling inkjet nozzle loading.
  • An inkjet printhead includes multiple nozzles for ejecting ink onto a print media to form character, symbols and/or graphics.
  • the ink is stored in a reservoir and passively loaded into nozzles via respective nozzle channels. For example, capillary action moves the ink from the reservoir through small nozzle channels into respective nozzle chambers. A firing resistor in a respective chamber then is activated and ejects the ink out of the nozzle.
  • the geometry of a given channel defines how quickly a corresponding nozzle chamber is refilled after nozzle firing.
  • Typical passive loading of a nozzle chamber includes the rapid flow of ink into the chamber after the nozzle fires.
  • the ink flow action is characterized as a repeating flow and ebb process in which ink flows into the chamber, then back-flows slightly.
  • Channel geometry defines passive damping qualities which limit the in-flow and determines a steady-state chamber height.
  • the flow and ebb cycle is passively damped until a steady state chamber level is maintained. Thereafter, the nozzle is fired.
  • the damping flow and ebb characteristic of passive nozzle loading occurs over a known period of time. Nozzle firing can occur any time after such period, and result in ejection of an ink drop with known repeatable volume and shape.
  • One goal of printing is to print at increasingly high printing speeds.
  • the nozzle firing frequency increases.
  • the period between firings therefore decreases.
  • the ability to form ink drops of uniform volume and shape decreases.
  • some nozzles may be fired during a flow phase and thereby generate larger ink drops than other nozzles which fire during a steady-state or an ebb phase.
  • the nozzle loading times need to decrease.
  • passive loading schemes are inherently limited to a given loading period, there is a need for a method and apparatus which actively damps the flow and ebb cycle of nozzle loading to decrease nozzle loading time.
  • Another goal of printing is to print at increasingly improved resolution.
  • To achieve increased print resolution using inkjet technology it is desirable to print with smaller ink drops. Smaller ink drops are created using smaller nozzle chambers. For smaller nozzle chambers, smaller channel geometries are needed to reliably move the ink via capillary action. As the nozzle dimensions decrease, however, it becomes more difficult for conventional fabrication processes to control channel dimensions. As the channel dimensions control the ink flow and ebb, it becomes more difficult to passively control damping for smaller ink drop sizes. Accordingly, there is a need for a method and apparatus which actively damps the flow and ebb cycle of nozzle loading.
  • an ink loading control method and apparatus actively damps ink flow (including back-flow) in an inkjet nozzle.
  • ink flow into an inkjet nozzle chamber is throttled at a nozzle channel to damp ink flow into the chamber, to reduce ink back-flow out of the chamber, and to achieve steady-state chamber conditions in a shorter time than under comparable passive ink loading schemes.
  • a capacitive damping structure is implemented.
  • the capacitive structure is defined at a nozzle channel to slow down ink flow into a nozzle chamber and to resist back-flow of ink out of the chamber.
  • the capacitive structure defines a voltage potential across the channel width.
  • the capacitive structure discharges to ground and ink flows through the channel under passive flow conditions.
  • the ink flows passively for a known time before the capacitive structure is recharged.
  • the capacitive structure is activated to recharge and create a voltage potential across the channel, the ink flow is throttled and slowed. As a result, the surge and momentum is reduced and the chamber's initial maximum bulge is not as high as under conventional passive damping schemes.
  • the backlash of the surge is correspondingly reduced resulting in less back-flow.
  • the ink includes charge centers responsive to the voltage potential across the capacitive structure.
  • the charge centers are biased to a motionless position, although their momentum may carry them through the channel.
  • the net result of the initial capillary motion forces and the generated capacitive forces is to slow the motion through the capacitive structure (and thus, through the nozzle channel).
  • One known ink-type having charge centers is a polymer-based pigment ink, in which the polymers are charged to stay in solution.
  • an inductive damping structure is implemented.
  • the inductive structure is defined at a nozzle channel to slow down ink flow into a nozzle chamber and to resist back-flow of ink out of the chamber.
  • the inductive structure defines a magnetic field across the channel width. When a nozzle is fired, the inductive structure dissipates allowing ink to flow through the channel under passive flow conditions.
  • the ink flows passively for a known time before the inductive structure is reactivated.
  • the inductive structure induces a magnetic field perpendicular to the flow direction.
  • the ink is responsive to the magnetic field. In effect the inductive structure throttles the ink flow and back-flow.
  • the ink's surge and momentum is reduced and the chamber's inial maximum bulge is not as high as under conventional passive damping schemes.
  • the backlash of the surge is correspondingly reduced resulting in less back-flow.
  • the ink is a ferromagnetic ink responsive to the magnetic forces so as to be deterred from moving along the channel.
  • the back-flow pressure is reduced once the chamber is full.
  • the time to achieve a steady-state ink level in the chamber is reduced. Specifically, the time period is reduced between (i) initial achievement of a full chamber with the ink inertia pushing forward to create a bulging meniscus at the nozzle orifice, and (ii) the incremental time thereafter required for the ink flow and back-flow to stabilize and create a steady state ink level.
  • capacitive and inductive structures are implemented together to damp ink flow and back-flow.
  • One advantage of the invention is that set-up times to achieve a known repeatable ink drop volume are maintained or reduced. Another advantage is that ink flow is effectively maintained for increasingly small ink drop sizes using conventional channel materials. A beneficial effect is that faster printing speeds and improved resolution are achieved for inkjet printers using conventional channel materials and channel geometries.
  • Fig. 1 shows a conventional inkjet nozzle structure 10 loaded with ink I.
  • a silicon substrate 12 with additional layers defines one or more nozzles.
  • a nozzle 10 receives ink I from a reservoir via a nozzle channel 14.
  • the channel 14 is defined by barriers, including substrate 12, frame 36, nozzle plate 20, and passivation layer 22.
  • the ink flows into a nozzle chamber 16.
  • the nozzle chamber 16 is defined by barriers, including film 18, nozzle plate 20 and passivation layer 22.
  • the nozzle includes additional layers between the substrate 12 and passivation layer 22, including insulative layers 24, 26, another passivation layer 28 and a conductive film layer 30.
  • the conductive film layer 30 defines a firing resistor 32.
  • the nozzle plate 20 is mounted to a flex circuit 34.
  • the flex circuit forms the nozzle plate 20.
  • respective orifices are laser drilled to achieve a precise area, orientation and position relative to the nozzle chamber 16.
  • the nozzle orifice has a uniform diameter for each nozzle. In various embodiments the nozzle orifice is 10-50 microns in diameter.
  • the nozzle 10 is coupled to an ink body 36 which defines an ink reservoir.
  • Figs. 2a-e depict the nozzle chamber 16 at various times during a conventional passive ink-loading method.
  • curve a is a time-line of such times.
  • Fig. 2a shows the nozzle chamber 16 at a time t 0 corresponding to the firing of an ink drop D.
  • capillary action results in ink I flowing through channel 14 (see Fig. 1) into chamber 16.
  • the ink I flows into the chamber 16, at time t 1 (see Fig. 2b and Fig. 3) the ink I surges to a maximum height, (shown as a bulging meniscus). The natural capillary forces then cause the ink to back-flow.
  • a time t 2 the back-flow results in a receding meniscus, See Fig. 2c.
  • the nozzle 10 then is ready to re-fire.
  • time t 4 nozzle 10 is refired as shown in Fig. 2e, restarting the passive loading process of Figs. 2a-d.
  • Fig. 4 shows a portion of a nozzle 60, according to an embodiment of this invention.
  • Nozzle 60 similar to nozzle 10, but includes a damping structure for actively controlling the ink loading process.
  • the nozzle 60 includes a channel 14 and chamber 16 which receive ink via capillary action from an ink reservoir (not shown).
  • the damping structure in one embodiment is a capacitive device 62 formed by conductive plates 64, 66 located across opposing sides of the channel 14. Voltages of opposite polarity are defined at the respective plates 64, 66 to create a voltage potential across the channel 14.
  • the plates 64, 66 and the matter between e.g., channel 14, ink I and insulative layers 68, 70
  • the capacitive structure 62 spans the length of channel 14. In other embodiments the structure 62 extends beyond the channel 14 toward an ink reservoir. In another embodiment, the structure 62 spans a length shorter than channel 14. Preferably, the structure 62 does not extend into the area of chamber 16, particularly the area adjacent to the firing resistor 32. Preferably, coupling forces between the firing resistor 32 and one or both of the plates 64, 66 is avoided.
  • the purpose of the capacitive structure 62 is to throttle the ink movement through channel 14 so as to damp the flow and ebb characteristic of the capillary ink flow action.
  • Figs. 5a-e show the nozzle 60 at various times during the actively-controlled ink loading method according to an embodiment of this invention.
  • Fig. 3 curve b represents a time-line of the various times represented in Figs. 5a-e.
  • Figs. 6a-c show firing resistor 32 current, structure 62 capacitance, and chamber 16 ink volume at the various times t' 0 through t' 4 .
  • At time t' 0 an ink drop D is fired from chamber 16 - see Fig. 5a.
  • the firing resistor current is pulsed causing the resistor to fire.
  • the ink volume in chamber 16 decreases as shown in Fig. 6c.
  • the capacitive structure 62 is activated at the time of firing (see Fig. 6b) creating a voltage potential across channel 14. Also, the natural capillary forces cause ink to flow through channel 14 into chamber 16. The voltage potential across channel 14 acts upon charge centers in the ink to throttle ink flow through channel 14 during the flow cycle.
  • the chamber 16 reaches a maximum volume of ink I - see Fig. 5b and 6c. Note that this maximum volume is less than that of a comparable nozzle 10 lacking active damping control. (Compare the heights in Figs. 2b and 5b). The natural capillary forces still cause a flow and ebb process, however, the ebb or back-flow also is damped by the capacitive structure 62. As shown in Fig. 5c and 6b, the minimum at time t' 2 is not as low as the comparable minimum of Fig. 2c. Further, the time interval between t' 2 and t' 1 is less than the time interval between t 2 and t 1 .
  • the flow and ebb repeats in a generally sinusoidal damping fashion until a steady-state ink volume is achieved at time t' 3 - see Figs. 5c and 6.
  • the time interval between t' 1 and t' 3 is less than the time interval between t 1 and t 3 .
  • the time interval between time t' 0 and t' 3 is less than the time interval between times t 0 and t 3 .
  • the firing period T may be reduced, and correspondingly the firing frequency may be increased
  • Fig. 3 shows respective firing periods for the conventional nozzle 10 and the nozzle 60 of this invention.
  • Fig. 5e shows the nozzle 60 re-firing, thereby restarting the cycle depicted in Figs. 5a-d and Fig. 6.
  • the ink I include charge centers or have charge centers induced.
  • Conventional polymer based pigments include charge centers which serve to maintain the polymers in solution. Such charge centers are further utilized according to embodiments of this invention to enable ink flow damping.
  • a force of 17-20 dynes is applied to ink having a viscosity of 2 centipoise, along a channel 14 having a diameter of approximately 26 micrometers.
  • Fig. 7 shows a portion of a nozzle 80 according to another embodiment of this invention.
  • Nozzle 80 is similar to nozzle 10 but includes an alternative damping structure for actively controlling the ink loading process.
  • the nozzle 80 includes a channel 14 and chamber 16 which receive ink via capillary action from an ink reservoir (not shown).
  • the dumping structure in this embodiment is an inductive device 82 formed by an inductive plate 84 positioned adjacent to channel 14. A current is applied to the inductive device 82 to create a magnetic field perpendicular to the channel 14 length.
  • the inductor plate 84 is positioned over the channel 14 inducing a vertical magnetic field.
  • the plate 84 is positioned along another wall defining channel 14 and generates a magnetic field having a different orientation. In each ease, however, the magnetic field is oriented perpendicular to the length of channel 14.
  • the channel length runs from the reservoir to the nozzle chamber 16.
  • the channel 14 may be uniform or non-uniform, straight, curved or sectioned.
  • the inductive structure 82 spans the entire length of channel 14. In other embodiments the structure 82 extends beyond the channel toward an ink reservoir. In another embodiment, the structure 82 spans a length shorter than channel 14. Preferably, the structure 82 does not extend into the area of chamber 16, particularly the area adjacent to the firing resistor 32. Electromagnetic coupling between the firing resistor 32 and inductive structure 82 is preferably avoided.
  • the purpose of the inductive structure 82 is to throttle the ink movement through the channel 14 so as to damp the flow and ebb cycles of the capillary ink flow action.
  • Figs. 5a-e show the nozzle 80 at various times during the actively-controlled ink loading method according to an embodiment of this invention.
  • curve b shows various times t' 0 through t' 4 compared to the conventional passive loading method times t 0 through t 4 .
  • Figs. 7a-c shows firing resistor 32 current, inductance, and chamber 16 ink volume at the various times t' 0 through t' 4 .
  • At time t' 0 an ink drop D is fired from chamber 16 - see Fig. 5a.
  • the firing resistor current is pulsed causing the resistor to fire.
  • the ink volume in chamber 16 decreases as shown in Fig. 6c.
  • the inductive structure 82 is activated at the time of firing (see Fig. 6b) creating a magnetic field across channel 14. Also, the natural capillary forces cause ink to flow through channel 14 into chamber 16. The magnetic field acts upon the ink to throttle ink flow through channel 14 during the flow cycle.
  • the chamber 16 reaches a maximum volume of ink I - see Fig. 5b and 6c. Note that this maximum volume is less than that of a comparable nozzle 10 lacking active dumping control. (Compare the heights in Figs. 2b and 5b). The natural capillary forces still cause a flow and ebb process, however, the ebb or back-flow also is dumped by the capacitive structure 62. As shown in Fig. 5c and 6b, the minimum at time t' 2 is not as low as the comparable minimum of Fig. 2c. Further, the time interval between t' 2 and t' 1 is less than the time interval between t 2 and t 1 .
  • the flow and ebb repeats in a generally sinusoidal dumping fashion until a steady-state ink volume is achieved at time t' 3 - see Figs. 5c and 6.
  • the time interval between t' 1 and t' 3 is less than the time interval between t 1 and t 3 .
  • the time interval between time t' 0 and t' 3 is less than the time interval between times t 0 and t 3 .
  • the firing period T may be reduced, and correspondingly the firing frequency may be increased
  • Fig. 3 shows respective firing periods for the conventional nozzle 10 and the nozzle 80 of this invention.
  • Fig. 5e shows the nozzle 80 re-firing, thereby restarting the cycle depicted in Figs. 5a-d and Fig. 6.
  • the ink I be ferromagnetic.
  • An embodiment of the ferromagnetic ink is described below. According to a specific embodiment a force of 17-20 dynes is applied to ink having a viscosity of 2 centipoise, along a channel 14 having a diameter of approximately 26 micrometers.
  • the ferromagnetic ink is formed by including ferromagnetic particulate in an ink.
  • Exemplary ink bases include pigment or dye, solvents and water.
  • a suspension of finely divided ferromagnetic particles in a continuous medium, such as a colloidal solution is mixed with the ink base to achieve the ferromagnetic ink.
  • the ferromagnetic particles average between 5 and 5000 angstroms in diameter.
  • the ferromagnetic particles have an average diameter of approximately 100 angstrom and range between 50 and 200 angstrom in diameter.
  • the conventional inkjet nozzle is approximately 10-50 microns in diameter, the particles average 50-2000 times smaller than the nozzle diameter.
  • the average particle diameter is less than one-fiftieth (1/50) the diameter of the nozzles, (e.g., less than 500 Angstroms).
  • the colloidal solution is a dispersed ferromagnetic iron lignosulfonate.
  • the solution has a high molecular weight as characteristic of lignosulfonate and an x-ray diffraction pattern as typical of the dispersed ferromagnetic particles.
  • An exemplary solution is sold by the Georgia Pacific Corp. of Bellingham, Washington under the name LIGNOSITE FML.
  • the solution is a thermodynamically stable aqueous colloidal dispersion of ferromagnetic iron in lignosulfonate. The dispersion does not exhibit significant settling out, even upon standing for prolonged periods.
  • the solution can be dried and redissolved without separation of the iron from the lignosulfonate and without losing the magnetic properties. Such characteristics occur because the lignosulfonate is firmly attached to the magnetic particles by chemical bonds and is not separable by non-destructive chemical processes.
  • the LIGNOSITE FML solution is sold as dark drown liquid of approximately 32% solids and a Brookfield viscosity of 29 cps at 25°C.
  • the LIGNOSITE FML is mixed a black pigment ink base at a ratio of 1 part solution to 2 parts conventional black pigment ink base.
  • a black ink in one embodiment a carbon black pigment base ink is used.
  • An exemplary embodiment of such base has a viscosity of 4.6 cps at 25°C. and a surface tension of 55.9 dynes/cm.
  • the ink has a calculated saturization magnetization of 30 Gauss and an iron content of approximately 3%.
  • One advantage of the invention is that set-up tunes to achieve a known repeatable ink drop volume are maintained or reduced. Another advantage is that ink flow is effectively controlled for increasingly small ink drop sizes using conventional channel materials. A beneficial effect is that faster printing speeds and improved resolution are achieved for inkjet printers using conventional channel materials and channel geometric relations.

Landscapes

  • Ink Jet (AREA)
  • Particle Formation And Scattering Control In Inkjet Printers (AREA)
EP95309124A 1995-08-25 1995-12-14 Verfahren und Apparat zum Steuern des Tintennachfüllens eines Tintenstrahldruckkopfes Withdrawn EP0760286A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US51927695A 1995-08-25 1995-08-25
US519276 1995-08-25

Publications (1)

Publication Number Publication Date
EP0760286A1 true EP0760286A1 (de) 1997-03-05

Family

ID=24067603

Family Applications (1)

Application Number Title Priority Date Filing Date
EP95309124A Withdrawn EP0760286A1 (de) 1995-08-25 1995-12-14 Verfahren und Apparat zum Steuern des Tintennachfüllens eines Tintenstrahldruckkopfes

Country Status (2)

Country Link
EP (1) EP0760286A1 (de)
JP (1) JPH09118020A (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2001017781A1 (en) * 1999-09-03 2001-03-15 The Research Foundation Of The State University Of New York At Buffalo Acoustic fluid jet method and system for ejecting dipolar grains
US7182432B2 (en) 2003-04-08 2007-02-27 Oce-Technologies B.V. Inkjet printhead

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5663460A (en) * 1979-10-31 1981-05-30 Ricoh Co Ltd Ink jet head
JPS5729462A (en) * 1980-07-31 1982-02-17 Matsushita Electric Ind Co Ltd Ink jet recording
JPS57100078A (en) * 1980-12-15 1982-06-22 Ricoh Co Ltd On-demand type ink jet recorder
JPS61163864A (ja) * 1985-01-14 1986-07-24 Nec Corp インクジエツトヘツド
JPH02113950A (ja) * 1988-10-24 1990-04-26 Nec Corp インクジェットヘッド
EP0436047A1 (de) * 1990-01-02 1991-07-10 Siemens Aktiengesellschaft Flüssigkeitsstrahlaufzeichnungskopf für Tintendruckeinrichtungen

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5663460A (en) * 1979-10-31 1981-05-30 Ricoh Co Ltd Ink jet head
JPS5729462A (en) * 1980-07-31 1982-02-17 Matsushita Electric Ind Co Ltd Ink jet recording
JPS57100078A (en) * 1980-12-15 1982-06-22 Ricoh Co Ltd On-demand type ink jet recorder
JPS61163864A (ja) * 1985-01-14 1986-07-24 Nec Corp インクジエツトヘツド
JPH02113950A (ja) * 1988-10-24 1990-04-26 Nec Corp インクジェットヘッド
EP0436047A1 (de) * 1990-01-02 1991-07-10 Siemens Aktiengesellschaft Flüssigkeitsstrahlaufzeichnungskopf für Tintendruckeinrichtungen

Non-Patent Citations (6)

* Cited by examiner, † Cited by third party
Title
ANONYMOUS: "Ink Jet Printer Head", IBM TECHNICAL DISCLOSURE BULLETIN, vol. 27, no. 3, NEW YORK, US, pages 1731 - 1732 *
PATENT ABSTRACTS OF JAPAN vol. 005, no. 127 (M - 083) 15 August 1981 (1981-08-15) *
PATENT ABSTRACTS OF JAPAN vol. 006, no. 093 (M - 133) 29 May 1982 (1982-05-29) *
PATENT ABSTRACTS OF JAPAN vol. 006, no. 193 (M - 160) 2 October 1982 (1982-10-02) *
PATENT ABSTRACTS OF JAPAN vol. 010, no. 368 (M - 543) 9 December 1986 (1986-12-09) *
PATENT ABSTRACTS OF JAPAN vol. 014, no. 331 (M - 0999) 17 July 1990 (1990-07-17) *

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2001017781A1 (en) * 1999-09-03 2001-03-15 The Research Foundation Of The State University Of New York At Buffalo Acoustic fluid jet method and system for ejecting dipolar grains
US7182432B2 (en) 2003-04-08 2007-02-27 Oce-Technologies B.V. Inkjet printhead

Also Published As

Publication number Publication date
JPH09118020A (ja) 1997-05-06

Similar Documents

Publication Publication Date Title
US6382754B1 (en) Ink jet printing device
EP0580154B1 (de) Verfahren zum Erzeugen von Tintentröpfchen in einen Tintenstrahldrucker und nach der Art eines Tintenstrahldruckers arbeitendes Aufzeichnungsgerät
CA1082285A (en) Method and apparatus for forming a liquid jet particularly suited for ink-jet printing
KR100482792B1 (ko) 비말분사장치의작동방법
JP3282119B2 (ja) 液体自由表面の空間位置を安定化する方法及び装置
EP0720534B1 (de) Auf abruf arbeitende hochfrequenz-tintenstrahldruckvorrichtung
EP0145130B1 (de) Bedarfsweise betriebener Tintenstrahldruckkopf mit Mitteln zur Flüssigkeitskontrolle
EP2760673A1 (de) Zirkulation von öffnung zu öffnung bei einer flüssigkeitsausstossvorrichtung
Szczech et al. Ink jet processing of metallic nanoparticle suspensions for electronic circuitry fabrication
JPH0436071B2 (de)
JP3956224B2 (ja) 液体吐出装置
JP3763200B2 (ja) インクジェット式記録装置
EP1659094A1 (de) Verfahren zur herstellung einer dreidimensionalen struktur und feine dreidimensionale struktur
JPS60259458A (ja) インク噴射記録装置
GB2200869A (en) Ink jet recording head and ink jet recording apparatus having the ink jet recording head
JPH05330044A (ja) インク噴射プリントヘッド
EP0760286A1 (de) Verfahren und Apparat zum Steuern des Tintennachfüllens eines Tintenstrahldruckkopfes
US20070200884A1 (en) Method and a system for single ligament fluid dispensing
KR20000029341A (ko) 프린터 장치
KR101056203B1 (ko) 액적 분사 장치
JP4397642B2 (ja) 静電吸引型流体吐出方法およびその装置
EP0389738A2 (de) Abstimmung der Druckknopfleistung durch Regelung der Tintenviskosität
US20080100685A1 (en) Thermal ejection of solution having solute onto device medium
EP0629503B1 (de) Tintenstrahlaufzeichnungsgerät mit elektrostatischem Betätiger und Verfahren zu seiner Steuerung
JPS59176060A (ja) インクジエツトヘツド駆動方法

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): DE FR GB IT

17P Request for examination filed

Effective date: 19970509

17Q First examination report despatched

Effective date: 19980514

RAP1 Party data changed (applicant data changed or rights of an application transferred)

Owner name: HEWLETT-PACKARD COMPANY, A DELAWARE CORPORATION

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 20011228